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qtk
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Add Scene class to manage active object data 

+ Move MainWidget::Camera() to Scene::Camera()
+ Move MainWidget::Projection() to Scene::Projection()
+ Add Scene::View() static function to retrieve camera view matrix
This commit is contained in:
Shaun Reed 2021-09-19 14:06:41 -04:00
parent fb359060bc
commit aebab76915
10 changed files with 855 additions and 772 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
CMakeLists.txt
View File

@ -73,21 +73,23 @@ target_link_libraries(texture PUBLIC Qt5::Widgets)
add_library(object lib/object.cpp) add_library(object lib/object.cpp)
target_include_directories(object PUBLIC lib/) target_include_directories(object PUBLIC lib/)
target_link_libraries(object PUBLIC Qt5::Widgets) target_link_libraries(object PUBLIC Qt5::Widgets)
target_link_libraries(object INTERFACE mesh)
# MeshRenderer # MeshRenderer
add_library(meshrenderer lib/meshrenderer.cpp) add_library(meshrenderer lib/meshrenderer.cpp)
target_include_directories(meshrenderer PUBLIC lib/) target_include_directories(meshrenderer PUBLIC lib/)
target_link_libraries(meshrenderer PUBLIC Qt5::Widgets) target_link_libraries(meshrenderer PUBLIC object)
# Camera3D # Camera3D
add_library(camera3d lib/camera3d.cpp) add_library(camera3d lib/camera3d.cpp)
target_include_directories(camera3d PUBLIC lib/) target_include_directories(camera3d PUBLIC lib/)
target_link_libraries(camera3d INTERFACE input)
target_link_libraries(camera3d PUBLIC Qt5::Widgets) target_link_libraries(camera3d PUBLIC Qt5::Widgets)
# Skybox # Skybox
add_library(skybox lib/skybox.cpp) add_library(skybox lib/skybox.cpp)
# Skybox needs Mesh, Camera3D, and Qt5::Widgets
target_link_libraries(skybox PRIVATE mesh) target_link_libraries(skybox PRIVATE mesh)
# Skybox needs Mesh and Camera3D and Qt5::Widgets
target_link_libraries(skybox PRIVATE camera3d) target_link_libraries(skybox PRIVATE camera3d)
# Transform3D # Transform3D
@ -102,19 +104,22 @@ target_link_libraries(model PRIVATE assimp)
# Model library requires transform3d and Qt5::Widgets # Model library requires transform3d and Qt5::Widgets
target_link_libraries(model PUBLIC transform3d) target_link_libraries(model PUBLIC transform3d)
# Scene
add_library(scene lib/scene.cpp)
target_include_directories(scene PUBLIC lib/)
target_link_libraries(scene PUBLIC model)
target_link_libraries(scene PUBLIC meshrenderer)
target_link_libraries(scene PUBLIC skybox)
target_link_libraries(scene PUBLIC texture)
################################################################################ ################################################################################
# Final Application # Final Application
################################################################################ ################################################################################
target_link_libraries(main-widget PUBLIC model) #target_link_libraries(main-widget PRIVATE input)
target_link_libraries(main-widget PRIVATE input)
target_link_libraries(main-widget PRIVATE transform3d)
target_link_libraries(main-widget PRIVATE object)
target_link_libraries(main-widget PRIVATE meshrenderer)
target_link_libraries(main-widget PRIVATE texture)
target_link_libraries(main-widget PRIVATE skybox)
target_link_libraries(main-widget PRIVATE mesh) target_link_libraries(main-widget PRIVATE mesh)
target_link_libraries(main-widget PUBLIC scene)
# Link qtk executable to main main-widget library # Link qtk executable to main main-widget library
target_link_libraries(qtk PUBLIC main-widget) target_link_libraries(qtk PUBLIC main-widget)

6
README.md
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@ -8,14 +8,14 @@ You can import your own models within `mainwdget.cpp`, inside the
to explain which model or example I'm modifying. Rotations and translations to explain which model or example I'm modifying. Rotations and translations
happen in `MainWidget::update()`, to get textures loading on models look into happen in `MainWidget::update()`, to get textures loading on models look into
[material files](http://www.paulbourke.net/dataformats/mtl/) and see some [material files](http://www.paulbourke.net/dataformats/mtl/) and see some
examples in the `resources/models/` directory. examples in the `resources/models/` directory. For more in-depth examples, see
`scene.h` and `scene.cpp`
Can be built with cmake manually or using Can be built with cmake manually or using
[Qt Creator](https://github.com/qt-creator/qt-creator). [Qt Creator](https://github.com/qt-creator/qt-creator).
To build and run `qtk` on Ubuntu - To build and run `qtk` on Ubuntu -
```bash ```bash
# Qt Creator
sudo apt update -y && sudo apt install qttools5-dev freeglut3-dev libassimp-dev cmake build-essential sudo apt update -y && sudo apt install qttools5-dev freeglut3-dev libassimp-dev cmake build-essential
git clone https://gitlab.com/shaunrd0/qtk && cd qtk git clone https://gitlab.com/shaunrd0/qtk && cd qtk
mkdir build && cd build mkdir build && cd build
@ -45,7 +45,7 @@ Spartan with normals -
"Scythe World Of Warcraft" (https://skfb.ly/6UooG) by Warcraft-3D-Models is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/). "Scythe World Of Warcraft" (https://skfb.ly/6UooG) by Warcraft-3D-Models is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).
"Spartan Armour MKV - Halo Reach" () by McCarthy3D is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/). "Spartan Armour MKV - Halo Reach" (https://skfb.ly/6QVvM) by McCarthy3D is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).
"Survival Guitar Backpack (Low Poly)" (https://skfb.ly/6RnCB) by Berk Gedik is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/). "Survival Guitar Backpack (Low Poly)" (https://skfb.ly/6RnCB) by Berk Gedik is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/).
Model by Berk Gedik, from: https://sketchfab.com/3d-models/survival-guitar-backpack-low-poly-799f8c4511f84fab8c3f12887f7e6b36 Model by Berk Gedik, from: https://sketchfab.com/3d-models/survival-guitar-backpack-low-poly-799f8c4511f84fab8c3f12887f7e6b36

755
lib/mainwidget.cpp
View File

@ -10,18 +10,11 @@
#include <input.h> #include <input.h>
#include <mesh.h> #include <mesh.h>
#include <meshrenderer.h>
#include <model.h>
#include <object.h> #include <object.h>
#include <skybox.h> #include <scene.h>
#include <texture.h>
#include <mainwidget.h> #include <mainwidget.h>
// Static member initialization
QMatrix4x4 MainWidget::mProjection;
Camera3D MainWidget::mCamera;
/******************************************************************************* /*******************************************************************************
* Constructors, Destructors * Constructors, Destructors
@ -66,575 +59,11 @@ void MainWidget::teardownGL()
void MainWidget::initObjects() void MainWidget::initObjects()
{ {
mCamera.transform().setTranslation(0.0f, 0.0f, 5.0f); mScene = new Scene;
mCamera.transform().setRotation(180.0f, 0.0f, 1.0f, 0.0f);
mSkybox = new Skybox;
//
// Model loading
mModels.push_back(new Model("backpack",
"../resources/models/backpack/backpack.obj"));
// Sometimes model textures need flipped in certain directions
mModels.back()->flipTexture("diffuse.jpg", false, true);
mModels.back()->mTransform.setTranslation(0.0f, 0.0f, -10.0f);
mModels.push_back(
new Model("bird",
"../resources/models/bird/bird.obj"));
mModels.back()->mTransform.setTranslation(2.0f, 2.0f, -10.0f);
// Sometimes the models are very large
mModels.back()->mTransform.scale(0.0025f);
mModels.back()->mTransform.rotate(-110.0f, 0.0f, 1.0f, 0.0f);
mModels.push_back(new Model("lion",
"../resources/models/lion/lion.obj"));
mModels.back()->mTransform.setTranslation(-3.0f, -1.0f, -10.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.push_back(
new Model("alien",
"../resources/models/alien-hominid/alien.obj"));
mModels.back()->mTransform.setTranslation(2.0f, -1.0f, -5.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.push_back(
new Model("scythe",
"../resources/models/scythe/scythe.obj")
);
mModels.back()->mTransform.setTranslation(-6.0f, 0.0f, -10.0f);
mModels.back()->mTransform.rotate(-90.0f, 1.0f, 0.0f, 0.0f);
mModels.back()->mTransform.rotate(90.0f, 0.0f, 1.0f, 0.0f);
mModels.push_back(
new Model("masterChief",
"../resources/models/spartan/spartan.obj"));
mModels.back()->mTransform.setTranslation(-1.5f, 0.5f, -2.0f);
// Render an alien with specular
// Test alien Model with phong lighting and specular mapping
mMeshes.push_back(
new MeshRenderer("alienTestLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(4.0f, 1.5f, 10.0f);
mMeshes.back()->mTransform.scale(0.25f);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setColor(GREEN);
mMeshes.back()->init();
mModels.push_back(
new Model("alienTest",
"../resources/models/alien-hominid/alien.obj",
":/model-specular.vert", ":/model-specular.frag"));
mModels.back()->mTransform.setTranslation(3.0f, -1.0f, 10.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.back()->setUniform("uMaterial.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.specular", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.ambientStrength", 0.8f);
mModels.back()->setUniform("uMaterial.diffuseStrength", 0.8f);
mModels.back()->setUniform("uMaterial.specularStrength", 1.0f);
mModels.back()->setUniform("uMaterial.shine", 32.0f);
mModels.back()->setUniform("uLight.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.specular", QVector3D(1.0f, 1.0f, 1.0f));
// Test spartan Model with phong lighting, specular and normal mapping
mMeshes.push_back(
new MeshRenderer("spartanTestLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(1.0f, 1.5f, 10.0f);
mMeshes.back()->mTransform.scale(0.25f);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setColor(GREEN);
mMeshes.back()->init();
mModels.push_back(
new Model("spartanTest",
"../resources/models/spartan/spartan.obj",
":/model-normals.vert", ":/model-normals.frag"));
mModels.back()->mTransform.setTranslation(0.0f, -1.0f, 10.0f);
mModels.back()->mTransform.scale(2.0f);
mModels.back()->setUniform("uMaterial.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.specular", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.ambientStrength", 1.0f);
mModels.back()->setUniform("uMaterial.diffuseStrength", 1.0f);
mModels.back()->setUniform("uMaterial.specularStrength", 1.0f);
mModels.back()->setUniform("uMaterial.shine", 128.0f);
mModels.back()->setUniform("uLight.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.specular", QVector3D(1.0f, 1.0f, 1.0f));
// Test basic cube with phong.vert and phong.frag shaders
mMeshes.push_back(
new MeshRenderer("testLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 1.25f, 10.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.back()->setDrawType(GL_LINE_LOOP);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setColor(GREEN);
mMeshes.back()->init();
mMeshes.push_back(
new MeshRenderer("testPhong", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, 10.0f);
mMeshes.back()->setShaders(":/phong.vert", ":/phong.frag");
mMeshes.back()->setColor(QVector3D(0.0f, 0.25f, 0.0f));
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->setUniform("uMaterial.ambient", QVector3D(0.0f, 0.3f, 0.0f));
mMeshes.back()->setUniform("uMaterial.diffuse", QVector3D(0.0f, 0.2f, 0.0f));
mMeshes.back()->setUniform("uMaterial.specular", QVector3D(1.0f, 1.0f, 1.0f));
mMeshes.back()->setUniform("uMaterial.ambientStrength", 1.0f);
mMeshes.back()->setUniform("uMaterial.diffuseStrength", 1.0f);
mMeshes.back()->setUniform("uMaterial.specularStrength", 1.0f);
mMeshes.back()->setUniform("uMaterial.shine", 64.0f);
mMeshes.back()->setUniform("uLight.ambient", QVector3D(0.25f, 0.2f, 0.075f));
mMeshes.back()->setUniform("uLight.diffuse", QVector3D(0.75f, 0.6f, 0.22f));
mMeshes.back()->setUniform("uLight.specular", QVector3D(0.62f, 0.55f, 0.37f));
mMeshes.back()->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mMeshes.back()->mProgram.release();
//
// Creating simple objects with the MeshRenderer class
mMeshes.push_back(
new MeshRenderer("rightTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-5.0f, 0.0f, -2.0f);
mMeshes.push_back(
new MeshRenderer("centerCube", Cube(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-7.0f, 0.0f, -2.0f);
mMeshes.push_back(
new MeshRenderer("leftTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-9.0f, 0.0f, -2.0f);
mMeshes.back()->setDrawType(GL_LINE_LOOP);
mMeshes.push_back(
new MeshRenderer("topTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-7.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.push_back(
new MeshRenderer("bottomTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-7.0f, -2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.back()->setColor(GREEN);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setDrawType(GL_LINE_LOOP);
mMeshes.back()->init();
//
// Testing for normals, texture coordinates
// RGB Normals cube to show normals are correct with QTK_DRAW_ARRAYS
mMeshes.push_back(
new MeshRenderer("rgbNormalsCubeArraysTest", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, 4.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
// RGB Normals cube to show normals are correct with QTK_DRAW_ELEMENTS_NORMALS
mMeshes.push_back(
new MeshRenderer("rgbNormalsCubeElementsTest", Cube(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, 2.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
// Texturing a cube using texture coordinates and glDrawArrays
// + Texturing with UVs using glDrawElements requires QTK_DRAW_ELEMENTS_NORMALS
// + UVs required duplicating element position data from QTK_DRAW_ELEMENTS
// + This is because the same position must use different UV coordinates
mMeshes.push_back(
new MeshRenderer("uvCubeArraysTest", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(-3.0f, 0.0f, -2.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->texture().bind();
mMeshes.back()->texture().release();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Test drawing a cube with texture coordinates using glDrawElements
mMeshes.push_back(
new MeshRenderer("uvCubeElementsTest", Cube(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(-1.7f, 0.0f, -2.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->texCoords().data(),
mMeshes.back()->texCoords().size()
* sizeof(mMeshes.back()->texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->mProgram.setUniformValue("uTexture", 0);
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mTransform.rotate(45.0f, 0.0f, 1.0f, 0.0f);
// Texturing a cube using a cube map
// + Cube map texturing works with both QTK_DRAW_ARRAYS and QTK_DRAW_ELEMENTS
mMeshes.push_back(
new MeshRenderer("testCubeMap", Cube(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-3.0f, 1.0f, -2.0f);
mMeshes.back()->mTransform.setRotation(45.0f, 0.0f, 1.0f, 0.0f);
mMeshes.back()->setShaders(":/texture-cubemap.vert", ":/texture-cubemap.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initCubeMap(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Create a cube with custom shaders
// + Apply RGB normals shader and spin the cube for a neat effect
mMeshes.push_back(
new MeshRenderer("rgbNormalsCube", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 2.0f, -2.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
// RGB Normals triangle to show normals are correct with QTK_DRAW_ARRAYS
mMeshes.push_back(
new MeshRenderer("rgbTriangleArraysTest", Triangle(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(7.0f, 0.0f, 2.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// RGB Normals triangle to show normals are correct with QTK_DRAW_ELEMENTS
mMeshes.push_back(
new MeshRenderer("rgbTriangleElementsTest",
Triangle(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(7.0f, 0.0f, 4.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Test drawing triangle with glDrawArrays with texture coordinates
mMeshes.push_back(
new MeshRenderer("testTriangleArraysUV", Triangle(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(-3.0f, 2.0f, -2.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->texture().bind();
mMeshes.back()->texture().release();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Test drawing triangle with glDrawElements with texture coordinates
mMeshes.push_back(
new MeshRenderer("testTriangleElementsUV",
Triangle(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(-2.5f, 0.0f, -1.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->texture().bind();
mMeshes.back()->texture().release();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
//
// Lighting cube examples
// Example of a cube with no lighting applied
mMeshes.push_back(
new MeshRenderer("noLight", Cube(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, -2.0f);
mMeshes.back()->setShaders(":/solid-perspective.vert",
":/solid-perspective.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mMeshes.back()->mProgram.release();
// Create objects that represent light sources for lighting examples
mMeshes.push_back(
new MeshRenderer("phongLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(3.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.push_back(
new MeshRenderer("diffuseLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(9.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.push_back(
new MeshRenderer("specularLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(11.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
// Initialize Phong example cube
mTestPhong = new MeshRenderer("phong", Cube());
mTestPhong->mTransform.setTranslation(3.0f, 0.0f, -2.0f);
mTestPhong->setShaders(":/solid-phong.vert", ":/solid-phong.frag");
mTestPhong->init();
mTestPhong->mProgram.bind();
mTestPhong->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestPhong->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestPhong->setUniform("uAmbientStrength", 0.2f);
mTestPhong->setUniform("uSpecularStrength", 0.50f);
mTestPhong->setUniform("uSpecularShine", 256);
mTestPhong->mVAO.bind();
mTestPhong->mNBO.create();
mTestPhong->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestPhong->mNBO.bind();
mTestPhong->mNBO.allocate(mTestPhong->normals().data(),
mTestPhong->normals().size()
* sizeof(mTestPhong->normals()[0]));
mTestPhong->mProgram.enableAttributeArray(1);
mTestPhong->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestPhong->mNBO.release();
mTestPhong->mVAO.release();
mTestPhong->mProgram.release();
// Initialize Ambient example cube
mTestAmbient = new MeshRenderer("ambient", Cube());
mTestAmbient->mTransform.setTranslation(7.0f, 0.0f, -2.0f);
mTestAmbient->setShaders(":/solid-ambient.vert", ":/solid-ambient.frag");
mTestAmbient->init();
mTestAmbient->mProgram.bind();
mTestAmbient->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestAmbient->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestAmbient->setUniform("uAmbientStrength", 0.2f);
mTestAmbient->mVAO.bind();
mTestAmbient->mNBO.create();
mTestAmbient->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestAmbient->mNBO.bind();
mTestAmbient->mNBO.allocate(mTestAmbient->normals().data(),
mTestAmbient->normals().size()
* sizeof(mTestAmbient->normals()[0]));
mTestAmbient->mProgram.enableAttributeArray(1);
mTestAmbient->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestAmbient->mNBO.release();
mTestAmbient->mVAO.release();
mTestAmbient->mProgram.release();
// Initialize Diffuse example cube
mTestDiffuse = new MeshRenderer("diffuse", Cube());
mTestDiffuse->mTransform.setTranslation(9.0f, 0.0f, -2.0f);
mTestDiffuse->setShaders(":/solid-diffuse.vert", ":/solid-diffuse.frag");
mTestDiffuse->init();
mTestDiffuse->mProgram.bind();
mTestDiffuse->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestDiffuse->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestDiffuse->setUniform("uAmbientStrength", 0.2f);
mTestDiffuse->mVAO.bind();
mTestDiffuse->mNBO.create();
mTestDiffuse->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestDiffuse->mNBO.bind();
mTestDiffuse->mNBO.allocate(mTestDiffuse->normals().data(),
mTestDiffuse->normals().size()
* sizeof(mTestDiffuse->normals()[0]));
mTestDiffuse->mProgram.enableAttributeArray(1);
mTestDiffuse->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestDiffuse->mNBO.release();
mTestDiffuse->mVAO.release();
mTestDiffuse->mProgram.release();
// Initialize Specular example cube
mTestSpecular = new MeshRenderer("specular", Cube());
mTestSpecular->mTransform.setTranslation(11.0f, 0.0f, -2.0f);
mTestSpecular->setShaders(":/solid-specular.vert", ":/solid-specular.frag");
mTestSpecular->init();
mTestSpecular->mProgram.bind();
mTestSpecular->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestSpecular->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestSpecular->setUniform("uAmbientStrength", 0.2f);
mTestSpecular->setUniform("uSpecularStrength", 0.50f);
mTestSpecular->setUniform("uSpecularShine", 256);
mTestSpecular->mVAO.bind();
mTestSpecular->mNBO.create();
mTestSpecular->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestSpecular->mNBO.bind();
mTestSpecular->mNBO.allocate(mTestSpecular->normals().data(),
mTestSpecular->normals().size()
* sizeof(mTestSpecular->normals()[0]));
mTestSpecular->mProgram.enableAttributeArray(1);
mTestSpecular->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestSpecular->mNBO.release();
mTestSpecular->mVAO.release();
mTestSpecular->mProgram.release();
// Drawing a primitive object using Qt and OpenGL // Drawing a primitive object using Qt and OpenGL
// The Object class only stores basic QOpenGL* members and shape data // The Object class only stores basic QOpenGL* members and shape data
// + Within mainwidget, mObject serves as a basic QOpenGL example
mObject = new Object("testObject"); mObject = new Object("testObject");
mObject->setVertices(Cube(QTK_DRAW_ELEMENTS).vertices()); mObject->setVertices(Cube(QTK_DRAW_ELEMENTS).vertices());
mObject->setIndices(Cube(QTK_DRAW_ELEMENTS).indices()); mObject->setIndices(Cube(QTK_DRAW_ELEMENTS).indices());
@ -681,63 +110,19 @@ void MainWidget::paintGL()
// Clear buffers // Clear buffers
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT); glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
mSkybox->draw(); // Draw the scene first, since it handles drawing our skybox
mScene->draw();
for (auto & model : mModels) model->draw();
mTestPhong->mProgram.bind();
mTestPhong->setUniform("uModelInverseTransposed",
mTestPhong->mTransform.toMatrix().normalMatrix());
mTestPhong->setUniform(
"uLightPosition",
MeshRenderer::getInstance("phongLight")->mTransform.translation());
mTestPhong->setUniform("uCameraPosition",
mCamera.transform().translation());
mTestPhong->mProgram.release();
mTestPhong->draw();
mTestAmbient->mProgram.bind();
mTestAmbient->setUniform("uCameraPosition",
mCamera.transform().translation());
mTestAmbient->mProgram.release();
mTestAmbient->draw();
mTestDiffuse->mProgram.bind();
mTestDiffuse->setUniform("uModelInverseTransposed",
mTestDiffuse->mTransform.toMatrix().normalMatrix());
mTestDiffuse->setUniform(
"uLightPosition",
MeshRenderer::getInstance("diffuseLight")->mTransform.translation());
mTestDiffuse->setUniform("uCameraPosition",
mCamera.transform().translation());
mTestDiffuse->mProgram.release();
mTestDiffuse->draw();
mTestSpecular->mProgram.bind();
mTestSpecular->setUniform(
"uModelInverseTransposed",
mTestSpecular->mTransform.toMatrix().normalMatrix());
mTestSpecular->setUniform(
"uLightPosition",
MeshRenderer::getInstance("specularLight")->mTransform.translation());
mTestSpecular->setUniform("uCameraPosition",
mCamera.transform().translation());
mTestSpecular->mProgram.release();
mTestSpecular->draw();
// Draw any additional objects within mainwidget manually
mObject->mProgram.bind(); mObject->mProgram.bind();
mObject->mVAO.bind(); mObject->mVAO.bind();
mObject->mProgram.setUniformValue("uModel", mObject->mProgram.setUniformValue("uModel", mObject->mTransform.toMatrix());
mObject->mTransform.toMatrix()); mObject->mProgram.setUniformValue("uView", Scene::Camera().toMatrix());
mObject->mProgram.setUniformValue("uView", mCamera.toMatrix()); mObject->mProgram.setUniformValue("uProjection", Scene::Projection());
mObject->mProgram.setUniformValue("uProjection", mProjection);
glDrawElements(GL_TRIANGLES, mObject->indices().size(), glDrawElements(GL_TRIANGLES, mObject->indices().size(),
GL_UNSIGNED_INT, mObject->indices().data()); GL_UNSIGNED_INT, mObject->indices().data());
mObject->mVAO.release(); mObject->mVAO.release();
mObject->mProgram.release(); mObject->mProgram.release();
for (const auto &mesh : mMeshes) mesh->draw();
} }
void MainWidget::initializeGL() void MainWidget::initializeGL()
@ -775,8 +160,8 @@ void MainWidget::initializeGL()
void MainWidget::resizeGL(int width, int height) void MainWidget::resizeGL(int width, int height)
{ {
mProjection.setToIdentity(); Scene::Projection().setToIdentity();
mProjection.perspective(45.0f, Scene::Projection().perspective(45.0f,
float(width) / float(height), float(width) / float(height),
0.1f, 1000.0f); 0.1f, 1000.0f);
} }
@ -790,103 +175,7 @@ void MainWidget::update()
{ {
updateCameraInput(); updateCameraInput();
auto position = MeshRenderer::getInstance("alienTestLight")->mTransform.translation(); mScene->update();
Model::getInstance("alienTest")->setUniform(
"uLight.position", position);
Model::getInstance("alienTest")->setUniform(
"uCameraPosition", mCamera.transform().translation());
auto posMatrix = Model::getInstance("alienTest")->mTransform.toMatrix();
Model::getInstance("alienTest")->setUniform(
"uMVP.normalMatrix", posMatrix.normalMatrix());
Model::getInstance("alienTest")->setUniform(
"uMVP.model", posMatrix);
Model::getInstance("alienTest")->setUniform(
"uMVP.view", MainWidget::Camera().toMatrix());
Model::getInstance("alienTest")->setUniform(
"uMVP.projection", MainWidget::Projection());
Model::getInstance("alienTest")->mTransform.rotate(0.75f, 0.0f, 1.0f, 0.0f);
position = MeshRenderer::getInstance("spartanTestLight")->mTransform.translation();
Model::getInstance("spartanTest")->setUniform(
"uLight.position", position);
Model::getInstance("spartanTest")->setUniform(
"uCameraPosition", mCamera.transform().translation());
posMatrix = Model::getInstance("spartanTest")->mTransform.toMatrix();
Model::getInstance("spartanTest")->setUniform(
"uMVP.normalMatrix", posMatrix.normalMatrix());
Model::getInstance("spartanTest")->setUniform(
"uMVP.model", posMatrix);
Model::getInstance("spartanTest")->setUniform(
"uMVP.view", MainWidget::Camera().toMatrix());
Model::getInstance("spartanTest")->setUniform(
"uMVP.projection", MainWidget::Projection());
Model::getInstance("spartanTest")->mTransform.rotate(0.75f, 0.0f, 1.0f, 0.0f);
MeshRenderer::getInstance("testPhong")->mTransform.rotate(
0.75f, 1.0f, 0.5f, 0.0f);
MeshRenderer::getInstance("testPhong")->mProgram.bind();
position = MeshRenderer::getInstance("testLight")->mTransform.translation();
MeshRenderer::getInstance("testPhong")->setUniform(
"uLight.position", position);
MeshRenderer::getInstance("testPhong")->setUniform(
"uCameraPosition", mCamera.transform().translation());
posMatrix = MeshRenderer::getInstance("testPhong")->mTransform.toMatrix();
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.normalMatrix", posMatrix.normalMatrix());
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.model", posMatrix);
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.view", MainWidget::Camera().toMatrix());
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.projection", MainWidget::Projection());
MeshRenderer::getInstance("testPhong")->mProgram.release();
// Rotate lighting example cubes
mTestPhong->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
MeshRenderer::getInstance("noLight")->mTransform.rotate(
0.75f, 0.5f, 0.3f, 0.2f);
mTestAmbient->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
mTestDiffuse->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
mTestSpecular->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
// Examples of various translations and rotations
// Rotate in multiple directions simultaneously
MeshRenderer::getInstance("rgbNormalsCube")->mTransform.rotate(
0.75f, 0.2f, 0.4f, 0.6f);
// Pitch forward and roll sideways
MeshRenderer::getInstance("leftTriangle")->mTransform.rotate(
0.75f, 1.0f, 0.0f, 0.0f);
MeshRenderer::getInstance("rightTriangle")->mTransform.rotate(
0.75f, 0.0f, 0.0f, 1.0f);
// Move between two positions over time
static float translateX = 0.025f;
float limit = -9.0f; // Origin position.x - 2.0f
float posX =
MeshRenderer::getInstance("topTriangle")->mTransform.translation().x();
if (posX < limit || posX > limit + 4.0f) {
translateX = -translateX;
}
MeshRenderer::getInstance("topTriangle")->mTransform.translate(
translateX, 0.0f, 0.0f);
MeshRenderer::getInstance("bottomTriangle")->mTransform.translate(
-translateX, 0.0f, 0.0f);
// And lets rotate the triangles in two directions at once
MeshRenderer::getInstance("topTriangle")->mTransform.rotate(
0.75f, 0.2f, 0.0f, 0.4f);
MeshRenderer::getInstance("bottomTriangle")->mTransform.rotate(
0.75f, 0.0f, 0.2f, 0.4f);
// And make the bottom triangle green, instead of RGB
// Rotate center cube in several directions simultaneously
// + Not subject to gimbal lock since we are using quaternions :)
MeshRenderer::getInstance("centerCube")->mTransform.rotate(
0.75f, 0.2f, 0.4f, 0.6f);
QWidget::update(); QWidget::update();
} }
@ -1034,31 +323,31 @@ void MainWidget::updateCameraInput()
static const float rotSpeed = 0.5f; static const float rotSpeed = 0.5f;
// Handle rotations // Handle rotations
mCamera.transform().rotate(-rotSpeed * Input::mouseDelta().x(), Scene::Camera().transform().rotate(-rotSpeed * Input::mouseDelta().x(),
Camera3D::LocalUp); Camera3D::LocalUp);
mCamera.transform().rotate(-rotSpeed * Input::mouseDelta().y(), Scene::Camera().transform().rotate(-rotSpeed * Input::mouseDelta().y(),
mCamera.right()); Scene::Camera().right());
// Handle translations // Handle translations
QVector3D translation; QVector3D translation;
if (Input::keyPressed(Qt::Key_W)) { if (Input::keyPressed(Qt::Key_W)) {
translation += mCamera.forward(); translation += Scene::Camera().forward();
} }
if (Input::keyPressed(Qt::Key_S)) { if (Input::keyPressed(Qt::Key_S)) {
translation -= mCamera.forward(); translation -= Scene::Camera().forward();
} }
if (Input::keyPressed(Qt::Key_A)) { if (Input::keyPressed(Qt::Key_A)) {
translation -= mCamera.right(); translation -= Scene::Camera().right();
} }
if (Input::keyPressed(Qt::Key_D)) { if (Input::keyPressed(Qt::Key_D)) {
translation += mCamera.right(); translation += Scene::Camera().right();
} }
if (Input::keyPressed(Qt::Key_Q)) { if (Input::keyPressed(Qt::Key_Q)) {
translation -= mCamera.up() / 2.0f; translation -= Scene::Camera().up() / 2.0f;
} }
if (Input::keyPressed(Qt::Key_E)) { if (Input::keyPressed(Qt::Key_E)) {
translation += mCamera.up() / 2.0f; translation += Scene::Camera().up() / 2.0f;
} }
mCamera.transform().translate(transSpeed * translation); Scene::Camera().transform().translate(transSpeed * translation);
} }
} }

19
lib/mainwidget.h
View File

@ -15,13 +15,12 @@
#include <QOpenGLFunctions> #include <QOpenGLFunctions>
#include <QOpenGLWidget> #include <QOpenGLWidget>
#include <camera3d.h>
#define QTK_DEBUG #define QTK_DEBUG
class MeshRenderer; class MeshRenderer;
class Model; class Model;
class Object; class Object;
class Scene;
class Skybox; class Skybox;
class Texture; class Texture;
@ -35,10 +34,6 @@ public:
explicit MainWidget(const QSurfaceFormat &format); explicit MainWidget(const QSurfaceFormat &format);
~MainWidget() override; ~MainWidget() override;
// Static Members
static inline QMatrix4x4 &Projection() { return mProjection;}
static inline Camera3D &Camera() { return mCamera;}
private: private:
void teardownGL(); void teardownGL();
void initObjects(); void initObjects();
@ -65,18 +60,8 @@ private:
void printContextInformation(); void printContextInformation();
void updateCameraInput(); void updateCameraInput();
// Private Members Scene * mScene;
static Camera3D mCamera;
static QMatrix4x4 mProjection;
Skybox * mSkybox;
Object * mObject; Object * mObject;
MeshRenderer * mTestPhong;
MeshRenderer * mTestSpecular;
MeshRenderer * mTestDiffuse;
MeshRenderer * mTestAmbient;
std::vector<MeshRenderer *> mMeshes;
std::vector<Model *> mModels;
QOpenGLDebugLogger * mDebugLogger; QOpenGLDebugLogger * mDebugLogger;
}; };

6
lib/meshrenderer.cpp
View File

@ -8,7 +8,7 @@
#include <QImageReader> #include <QImageReader>
#include <mainwidget.h> #include <scene.h>
#include <texture.h> #include <texture.h>
#include <meshrenderer.h> #include <meshrenderer.h>
@ -129,8 +129,8 @@ void MeshRenderer::setShaders(const std::string & vert, const std::string & frag
void MeshRenderer::setUniformMVP(const char * model, const char * view, void MeshRenderer::setUniformMVP(const char * model, const char * view,
const char * projection) const char * projection)
{ {
mProgram.setUniformValue(projection, MainWidget::Projection()); mProgram.setUniformValue(projection, Scene::Projection());
mProgram.setUniformValue(view, MainWidget::Camera().toMatrix()); mProgram.setUniformValue(view, Scene::View());
mProgram.setUniformValue(model, mTransform.toMatrix()); mProgram.setUniformValue(model, mTransform.toMatrix());
} }

8
lib/model.cpp
View File

@ -9,7 +9,7 @@
#include <QFileInfo> #include <QFileInfo>
#include <mainwidget.h> #include <scene.h>
#include <texture.h> #include <texture.h>
#include <model.h> #include <model.h>
@ -105,8 +105,8 @@ void ModelMesh::draw(QOpenGLShaderProgram & shader)
// Set Model View Projection values // Set Model View Projection values
shader.setUniformValue("uModel", mTransform.toMatrix()); shader.setUniformValue("uModel", mTransform.toMatrix());
shader.setUniformValue("uView", MainWidget::Camera().toMatrix()); shader.setUniformValue("uView", Scene::View());
shader.setUniformValue("uProjection", MainWidget::Projection()); shader.setUniformValue("uProjection", Scene::Projection());
GLuint diffuseCount = 1; GLuint diffuseCount = 1;
GLuint specularCount = 1; GLuint specularCount = 1;
@ -389,7 +389,7 @@ ModelMesh::Textures Model::loadMaterialTextures(
void Model::sortModels() void Model::sortModels()
{ {
auto cameraPos = MainWidget::Camera().transform(); auto cameraPos = Scene::Camera().transform();
auto cameraDistance = [&cameraPos](const ModelMesh &a, const ModelMesh &b) auto cameraDistance = [&cameraPos](const ModelMesh &a, const ModelMesh &b)
{ {
// Sort by the first vertex position, since all transforms will be the same // Sort by the first vertex position, since all transforms will be the same

759
lib/scene.cpp Normal file
View File

@ -0,0 +1,759 @@
/*##############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2021 Shaun Reed, all rights reserved ##
## About: Classes for managing objects and data within a scene ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
##############################################################################*/
#include <camera3d.h>
#include <texture.h>
#include <meshrenderer.h>
#include <model.h>
#include <scene.h>
Camera3D Scene::mCamera;
QMatrix4x4 Scene::mProjection;
/*******************************************************************************
* Constructors, Destructors
******************************************************************************/
Scene::Scene()
{
init();
}
Scene::~Scene()
{
delete mTestPhong;
delete mTestSpecular;
delete mTestDiffuse;
delete mTestAmbient;
for (auto & mesh : mMeshes) delete mesh;
for (auto & model : mModels) delete model;
}
/*******************************************************************************
* Public Member Functions
******************************************************************************/
void Scene::init()
{
mCamera.transform().setTranslation(0.0f, 0.0f, 5.0f);
mCamera.transform().setRotation(180.0f, 0.0f, 1.0f, 0.0f);
// Initialize Phong example cube
mTestPhong = new MeshRenderer("phong", Cube());
mTestPhong->mTransform.setTranslation(3.0f, 0.0f, -2.0f);
mTestPhong->setShaders(":/solid-phong.vert", ":/solid-phong.frag");
mTestPhong->init();
mTestPhong->mProgram.bind();
mTestPhong->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestPhong->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestPhong->setUniform("uAmbientStrength", 0.2f);
mTestPhong->setUniform("uSpecularStrength", 0.50f);
mTestPhong->setUniform("uSpecularShine", 256);
mTestPhong->mVAO.bind();
mTestPhong->mNBO.create();
mTestPhong->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestPhong->mNBO.bind();
mTestPhong->mNBO.allocate(mTestPhong->normals().data(),
mTestPhong->normals().size()
* sizeof(mTestPhong->normals()[0]));
mTestPhong->mProgram.enableAttributeArray(1);
mTestPhong->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestPhong->mNBO.release();
mTestPhong->mVAO.release();
mTestPhong->mProgram.release();
// Initialize Ambient example cube
mTestAmbient = new MeshRenderer("ambient", Cube());
mTestAmbient->mTransform.setTranslation(7.0f, 0.0f, -2.0f);
mTestAmbient->setShaders(":/solid-ambient.vert", ":/solid-ambient.frag");
mTestAmbient->init();
mTestAmbient->mProgram.bind();
mTestAmbient->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestAmbient->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestAmbient->setUniform("uAmbientStrength", 0.2f);
mTestAmbient->mVAO.bind();
mTestAmbient->mNBO.create();
mTestAmbient->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestAmbient->mNBO.bind();
mTestAmbient->mNBO.allocate(mTestAmbient->normals().data(),
mTestAmbient->normals().size()
* sizeof(mTestAmbient->normals()[0]));
mTestAmbient->mProgram.enableAttributeArray(1);
mTestAmbient->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestAmbient->mNBO.release();
mTestAmbient->mVAO.release();
mTestAmbient->mProgram.release();
// Initialize Diffuse example cube
mTestDiffuse = new MeshRenderer("diffuse", Cube());
mTestDiffuse->mTransform.setTranslation(9.0f, 0.0f, -2.0f);
mTestDiffuse->setShaders(":/solid-diffuse.vert", ":/solid-diffuse.frag");
mTestDiffuse->init();
mTestDiffuse->mProgram.bind();
mTestDiffuse->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestDiffuse->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestDiffuse->setUniform("uAmbientStrength", 0.2f);
mTestDiffuse->mVAO.bind();
mTestDiffuse->mNBO.create();
mTestDiffuse->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestDiffuse->mNBO.bind();
mTestDiffuse->mNBO.allocate(mTestDiffuse->normals().data(),
mTestDiffuse->normals().size()
* sizeof(mTestDiffuse->normals()[0]));
mTestDiffuse->mProgram.enableAttributeArray(1);
mTestDiffuse->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestDiffuse->mNBO.release();
mTestDiffuse->mVAO.release();
mTestDiffuse->mProgram.release();
// Initialize Specular example cube
mTestSpecular = new MeshRenderer("specular", Cube());
mTestSpecular->mTransform.setTranslation(11.0f, 0.0f, -2.0f);
mTestSpecular->setShaders(":/solid-specular.vert", ":/solid-specular.frag");
mTestSpecular->init();
mTestSpecular->mProgram.bind();
mTestSpecular->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mTestSpecular->setUniform("uLightColor", QVector3D(1.0f, 1.0f, 1.0f));
mTestSpecular->setUniform("uAmbientStrength", 0.2f);
mTestSpecular->setUniform("uSpecularStrength", 0.50f);
mTestSpecular->setUniform("uSpecularShine", 256);
mTestSpecular->mVAO.bind();
mTestSpecular->mNBO.create();
mTestSpecular->mNBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
mTestSpecular->mNBO.bind();
mTestSpecular->mNBO.allocate(mTestSpecular->normals().data(),
mTestSpecular->normals().size()
* sizeof(mTestSpecular->normals()[0]));
mTestSpecular->mProgram.enableAttributeArray(1);
mTestSpecular->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mTestSpecular->mNBO.release();
mTestSpecular->mVAO.release();
mTestSpecular->mProgram.release();
//
// Model loading
mModels.push_back(new Model("backpack",
"../resources/models/backpack/backpack.obj"));
// Sometimes model textures need flipped in certain directions
mModels.back()->flipTexture("diffuse.jpg", false, true);
mModels.back()->mTransform.setTranslation(0.0f, 0.0f, -10.0f);
mModels.push_back(
new Model("bird",
"../resources/models/bird/bird.obj"));
mModels.back()->mTransform.setTranslation(2.0f, 2.0f, -10.0f);
// Sometimes the models are very large
mModels.back()->mTransform.scale(0.0025f);
mModels.back()->mTransform.rotate(-110.0f, 0.0f, 1.0f, 0.0f);
mModels.push_back(new Model("lion",
"../resources/models/lion/lion.obj"));
mModels.back()->mTransform.setTranslation(-3.0f, -1.0f, -10.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.push_back(
new Model("alien",
"../resources/models/alien-hominid/alien.obj"));
mModels.back()->mTransform.setTranslation(2.0f, -1.0f, -5.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.push_back(
new Model("scythe",
"../resources/models/scythe/scythe.obj")
);
mModels.back()->mTransform.setTranslation(-6.0f, 0.0f, -10.0f);
mModels.back()->mTransform.rotate(-90.0f, 1.0f, 0.0f, 0.0f);
mModels.back()->mTransform.rotate(90.0f, 0.0f, 1.0f, 0.0f);
mModels.push_back(
new Model("masterChief",
"../resources/models/spartan/spartan.obj"));
mModels.back()->mTransform.setTranslation(-1.5f, 0.5f, -2.0f);
//
// Building example mesh objects
// Render an alien with specular
// Test alien Model with phong lighting and specular mapping
mMeshes.push_back(
new MeshRenderer("alienTestLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(4.0f, 1.5f, 10.0f);
mMeshes.back()->mTransform.scale(0.25f);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setColor(GREEN);
mMeshes.back()->init();
mModels.push_back(
new Model("alienTest",
"../resources/models/alien-hominid/alien.obj",
":/model-specular.vert", ":/model-specular.frag"));
mModels.back()->mTransform.setTranslation(3.0f, -1.0f, 10.0f);
mModels.back()->mTransform.scale(0.15f);
mModels.back()->setUniform("uMaterial.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.specular", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.ambientStrength", 0.8f);
mModels.back()->setUniform("uMaterial.diffuseStrength", 0.8f);
mModels.back()->setUniform("uMaterial.specularStrength", 1.0f);
mModels.back()->setUniform("uMaterial.shine", 32.0f);
mModels.back()->setUniform("uLight.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.specular", QVector3D(1.0f, 1.0f, 1.0f));
// Test spartan Model with phong lighting, specular and normal mapping
mMeshes.push_back(
new MeshRenderer("spartanTestLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(1.0f, 1.5f, 10.0f);
mMeshes.back()->mTransform.scale(0.25f);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setColor(GREEN);
mMeshes.back()->init();
mModels.push_back(
new Model("spartanTest",
"../resources/models/spartan/spartan.obj",
":/model-normals.vert", ":/model-normals.frag"));
mModels.back()->mTransform.setTranslation(0.0f, -1.0f, 10.0f);
mModels.back()->mTransform.scale(2.0f);
mModels.back()->setUniform("uMaterial.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.specular", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uMaterial.ambientStrength", 1.0f);
mModels.back()->setUniform("uMaterial.diffuseStrength", 1.0f);
mModels.back()->setUniform("uMaterial.specularStrength", 1.0f);
mModels.back()->setUniform("uMaterial.shine", 128.0f);
mModels.back()->setUniform("uLight.ambient", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.diffuse", QVector3D(1.0f, 1.0f, 1.0f));
mModels.back()->setUniform("uLight.specular", QVector3D(1.0f, 1.0f, 1.0f));
// Test basic cube with phong.vert and phong.frag shaders
mMeshes.push_back(
new MeshRenderer("testLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 1.25f, 10.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.back()->setDrawType(GL_LINE_LOOP);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setColor(GREEN);
mMeshes.back()->init();
mMeshes.push_back(
new MeshRenderer("testPhong", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, 10.0f);
mMeshes.back()->setShaders(":/phong.vert", ":/phong.frag");
mMeshes.back()->setColor(QVector3D(0.0f, 0.25f, 0.0f));
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->setUniform("uMaterial.ambient", QVector3D(0.0f, 0.3f, 0.0f));
mMeshes.back()->setUniform("uMaterial.diffuse", QVector3D(0.0f, 0.2f, 0.0f));
mMeshes.back()->setUniform("uMaterial.specular", QVector3D(1.0f, 1.0f, 1.0f));
mMeshes.back()->setUniform("uMaterial.ambientStrength", 1.0f);
mMeshes.back()->setUniform("uMaterial.diffuseStrength", 1.0f);
mMeshes.back()->setUniform("uMaterial.specularStrength", 1.0f);
mMeshes.back()->setUniform("uMaterial.shine", 64.0f);
mMeshes.back()->setUniform("uLight.ambient", QVector3D(0.25f, 0.2f, 0.075f));
mMeshes.back()->setUniform("uLight.diffuse", QVector3D(0.75f, 0.6f, 0.22f));
mMeshes.back()->setUniform("uLight.specular", QVector3D(0.62f, 0.55f, 0.37f));
mMeshes.back()->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mMeshes.back()->mProgram.release();
//
// Create simple shapes using MeshRenderer class and data in mesh.h
mMeshes.push_back(
new MeshRenderer("rightTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-5.0f, 0.0f, -2.0f);
mMeshes.push_back(
new MeshRenderer("centerCube", Cube(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-7.0f, 0.0f, -2.0f);
mMeshes.push_back(
new MeshRenderer("leftTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-9.0f, 0.0f, -2.0f);
mMeshes.back()->setDrawType(GL_LINE_LOOP);
mMeshes.push_back(
new MeshRenderer("topTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-7.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.push_back(
new MeshRenderer("bottomTriangle", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-7.0f, -2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.back()->setDrawType(GL_LINE_LOOP);
// This function changes values we have allocated in a buffer, so init() after
mMeshes.back()->setColor(GREEN);
mMeshes.back()->init();
//
// Testing for normals, texture coordinates
// RGB Normals cube to show normals are correct with QTK_DRAW_ARRAYS
mMeshes.push_back(
new MeshRenderer("rgbNormalsCubeArraysTest", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, 4.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
// RGB Normals cube to show normals are correct with QTK_DRAW_ELEMENTS_NORMALS
mMeshes.push_back(
new MeshRenderer("rgbNormalsCubeElementsTest", Cube(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, 2.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
// Texturing a cube using texture coordinates and glDrawArrays
// + Texturing with UVs using glDrawElements requires QTK_DRAW_ELEMENTS_NORMALS
// + UVs required duplicating element position data from QTK_DRAW_ELEMENTS
// + This is because the same position must use different UV coordinates
mMeshes.push_back(
new MeshRenderer("uvCubeArraysTest", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(-3.0f, 0.0f, -2.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->texture().bind();
mMeshes.back()->texture().release();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Test drawing a cube with texture coordinates using glDrawElements
mMeshes.push_back(
new MeshRenderer("uvCubeElementsTest", Cube(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(-1.7f, 0.0f, -2.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->texCoords().data(),
mMeshes.back()->texCoords().size()
* sizeof(mMeshes.back()->texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->mProgram.setUniformValue("uTexture", 0);
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mTransform.rotate(45.0f, 0.0f, 1.0f, 0.0f);
// Texturing a cube using a cube map
// + Cube map texturing works with both QTK_DRAW_ARRAYS and QTK_DRAW_ELEMENTS
mMeshes.push_back(
new MeshRenderer("testCubeMap", Cube(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(-3.0f, 1.0f, -2.0f);
mMeshes.back()->mTransform.setRotation(45.0f, 0.0f, 1.0f, 0.0f);
mMeshes.back()->setShaders(":/texture-cubemap.vert", ":/texture-cubemap.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initCubeMap(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Create a cube with custom shaders
// + Apply RGB normals shader and spin the cube for a neat effect
mMeshes.push_back(
new MeshRenderer("rgbNormalsCube", Cube(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 2.0f, -2.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mProgram.release();
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
// RGB Normals triangle to show normals are correct with QTK_DRAW_ARRAYS
mMeshes.push_back(
new MeshRenderer("rgbTriangleArraysTest", Triangle(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(7.0f, 0.0f, 2.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// RGB Normals triangle to show normals are correct with QTK_DRAW_ELEMENTS
mMeshes.push_back(
new MeshRenderer("rgbTriangleElementsTest",
Triangle(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(7.0f, 0.0f, 4.0f);
mMeshes.back()->setShaders(":/rgb-normals.vert", ":/rgb-normals.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->normals().data(),
mMeshes.back()->normals().size()
* sizeof(mMeshes.back()->normals()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
3, sizeof(QVector3D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Test drawing triangle with glDrawArrays with texture coordinates
mMeshes.push_back(
new MeshRenderer("testTriangleArraysUV", Triangle(QTK_DRAW_ARRAYS)));
mMeshes.back()->mTransform.setTranslation(-3.0f, 2.0f, -2.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->texture().bind();
mMeshes.back()->texture().release();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
// Test drawing triangle with glDrawElements with texture coordinates
mMeshes.push_back(
new MeshRenderer("testTriangleElementsUV",
Triangle(QTK_DRAW_ELEMENTS_NORMALS)));
mMeshes.back()->mTransform.setTranslation(-2.5f, 0.0f, -1.0f);
mMeshes.back()->setShaders(":/texture2d.vert", ":/texture2d.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setTexture(Texture::initTexture2D(":/crate.png"));
mMeshes.back()->setUniform("uTexture", 0);
mMeshes.back()->texture().bind();
mMeshes.back()->texture().release();
mMeshes.back()->mVAO.bind();
mMeshes.back()->mNBO.destroy();
mMeshes.back()->mNBO.create();
mMeshes.back()->mNBO.bind();
mMeshes.back()->mNBO.allocate(mMeshes.back()->mShape.texCoords().data(),
mMeshes.back()->mShape.texCoords().size()
* sizeof(mMeshes.back()->mShape.texCoords()[0]));
mMeshes.back()->mProgram.enableAttributeArray(1);
mMeshes.back()->mProgram.setAttributeBuffer(1, GL_FLOAT, 0,
2, sizeof(QVector2D));
mMeshes.back()->mNBO.release();
mMeshes.back()->mVAO.release();
mMeshes.back()->mProgram.release();
//
// Lighting cube examples
// Example of a cube with no lighting applied
mMeshes.push_back(
new MeshRenderer("noLight", Cube(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(5.0f, 0.0f, -2.0f);
mMeshes.back()->setShaders(":/solid-perspective.vert",
":/solid-perspective.frag");
mMeshes.back()->init();
mMeshes.back()->mProgram.bind();
mMeshes.back()->setUniform("uColor", QVector3D(0.0f, 0.25f, 0.0f));
mMeshes.back()->mProgram.release();
// Create objects that represent light sources for lighting examples
mMeshes.push_back(
new MeshRenderer("phongLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(3.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.push_back(
new MeshRenderer("diffuseLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(9.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
mMeshes.push_back(
new MeshRenderer("specularLight", Triangle(QTK_DRAW_ELEMENTS)));
mMeshes.back()->mTransform.setTranslation(11.0f, 2.0f, -2.0f);
mMeshes.back()->mTransform.scale(0.25f);
}
void Scene::draw()
{
mSkybox.draw();
for (auto & model : mModels) model->draw();
for (const auto &mesh : mMeshes) mesh->draw();
mTestPhong->mProgram.bind();
mTestPhong->setUniform("uModelInverseTransposed",
mTestPhong->mTransform.toMatrix().normalMatrix());
mTestPhong->setUniform(
"uLightPosition",
MeshRenderer::getInstance("phongLight")->mTransform.translation());
mTestPhong->setUniform("uCameraPosition",
Scene::Camera().transform().translation());
mTestPhong->mProgram.release();
mTestPhong->draw();
mTestAmbient->mProgram.bind();
mTestAmbient->setUniform("uCameraPosition",
Scene::Camera().transform().translation());
mTestAmbient->mProgram.release();
mTestAmbient->draw();
mTestDiffuse->mProgram.bind();
mTestDiffuse->setUniform("uModelInverseTransposed",
mTestDiffuse->mTransform.toMatrix().normalMatrix());
mTestDiffuse->setUniform(
"uLightPosition",
MeshRenderer::getInstance("diffuseLight")->mTransform.translation());
mTestDiffuse->setUniform("uCameraPosition", Scene::Camera().transform().translation());
mTestDiffuse->mProgram.release();
mTestDiffuse->draw();
mTestSpecular->mProgram.bind();
mTestSpecular->setUniform(
"uModelInverseTransposed",
mTestSpecular->mTransform.toMatrix().normalMatrix());
mTestSpecular->setUniform(
"uLightPosition",
MeshRenderer::getInstance("specularLight")->mTransform.translation());
mTestSpecular->setUniform("uCameraPosition", Scene::Camera().transform().translation());
mTestSpecular->mProgram.release();
mTestSpecular->draw();
}
void Scene::update()
{
auto position = MeshRenderer::getInstance("alienTestLight")->mTransform.translation();
Model::getInstance("alienTest")->setUniform(
"uLight.position", position);
Model::getInstance("alienTest")->setUniform(
"uCameraPosition", Scene::Camera().transform().translation());
auto posMatrix = Model::getInstance("alienTest")->mTransform.toMatrix();
Model::getInstance("alienTest")->setUniform(
"uMVP.normalMatrix", posMatrix.normalMatrix());
Model::getInstance("alienTest")->setUniform(
"uMVP.model", posMatrix);
Model::getInstance("alienTest")->setUniform(
"uMVP.view", Scene::Camera().toMatrix());
Model::getInstance("alienTest")->setUniform(
"uMVP.projection", Scene::Projection());
Model::getInstance("alienTest")->mTransform.rotate(0.75f, 0.0f, 1.0f, 0.0f);
position = MeshRenderer::getInstance("spartanTestLight")->mTransform.translation();
Model::getInstance("spartanTest")->setUniform(
"uLight.position", position);
Model::getInstance("spartanTest")->setUniform(
"uCameraPosition", Scene::Camera().transform().translation());
posMatrix = Model::getInstance("spartanTest")->mTransform.toMatrix();
Model::getInstance("spartanTest")->setUniform(
"uMVP.normalMatrix", posMatrix.normalMatrix());
Model::getInstance("spartanTest")->setUniform(
"uMVP.model", posMatrix);
Model::getInstance("spartanTest")->setUniform(
"uMVP.view", Scene::Camera().toMatrix());
Model::getInstance("spartanTest")->setUniform(
"uMVP.projection", Scene::Projection());
Model::getInstance("spartanTest")->mTransform.rotate(0.75f, 0.0f, 1.0f, 0.0f);
MeshRenderer::getInstance("testPhong")->mTransform.rotate(
0.75f, 1.0f, 0.5f, 0.0f);
MeshRenderer::getInstance("testPhong")->mProgram.bind();
position = MeshRenderer::getInstance("testLight")->mTransform.translation();
MeshRenderer::getInstance("testPhong")->setUniform(
"uLight.position", position);
MeshRenderer::getInstance("testPhong")->setUniform(
"uCameraPosition", Scene::Camera().transform().translation());
posMatrix = MeshRenderer::getInstance("testPhong")->mTransform.toMatrix();
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.normalMatrix", posMatrix.normalMatrix());
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.model", posMatrix);
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.view", Scene::Camera().toMatrix());
MeshRenderer::getInstance("testPhong")->setUniform(
"uMVP.projection", Scene::Projection());
MeshRenderer::getInstance("testPhong")->mProgram.release();
// Rotate lighting example cubes
mTestPhong->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
MeshRenderer::getInstance("noLight")->mTransform.rotate(
0.75f, 0.5f, 0.3f, 0.2f);
mTestAmbient->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
mTestDiffuse->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
mTestSpecular->mTransform.rotate(0.75f, 0.5f, 0.3f, 0.2f);
// Examples of various translations and rotations
// Rotate in multiple directions simultaneously
MeshRenderer::getInstance("rgbNormalsCube")->mTransform.rotate(
0.75f, 0.2f, 0.4f, 0.6f);
// Pitch forward and roll sideways
MeshRenderer::getInstance("leftTriangle")->mTransform.rotate(
0.75f, 1.0f, 0.0f, 0.0f);
MeshRenderer::getInstance("rightTriangle")->mTransform.rotate(
0.75f, 0.0f, 0.0f, 1.0f);
// Move between two positions over time
static float translateX = 0.025f;
float limit = -9.0f; // Origin position.x - 2.0f
float posX =
MeshRenderer::getInstance("topTriangle")->mTransform.translation().x();
if (posX < limit || posX > limit + 4.0f) {
translateX = -translateX;
}
MeshRenderer::getInstance("topTriangle")->mTransform.translate(
translateX, 0.0f, 0.0f);
MeshRenderer::getInstance("bottomTriangle")->mTransform.translate(
-translateX, 0.0f, 0.0f);
// And lets rotate the triangles in two directions at once
MeshRenderer::getInstance("topTriangle")->mTransform.rotate(
0.75f, 0.2f, 0.0f, 0.4f);
MeshRenderer::getInstance("bottomTriangle")->mTransform.rotate(
0.75f, 0.0f, 0.2f, 0.4f);
// And make the bottom triangle green, instead of RGB
// Rotate center cube in several directions simultaneously
// + Not subject to gimbal lock since we are using quaternions :)
MeshRenderer::getInstance("centerCube")->mTransform.rotate(
0.75f, 0.2f, 0.4f, 0.6f);
}

45
lib/scene.h Normal file
View File

@ -0,0 +1,45 @@
/*##############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2021 Shaun Reed, all rights reserved ##
## About: Classes for managing objects and data within a scene ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
##############################################################################*/
#ifndef QTK_SCENE_H
#define QTK_SCENE_H
#include <camera3d.h>
#include <skybox.h>
#include <QMatrix4x4>
class MeshRenderer;
class Model;
class Scene {
public:
Scene();
~Scene();
void init();
void draw();
void update();
static Camera3D & Camera() { return mCamera;}
static QMatrix4x4 View() { return mCamera.toMatrix();}
static QMatrix4x4 & Projection() { return mProjection;}
private:
static Camera3D mCamera;
static QMatrix4x4 mProjection;
Skybox mSkybox;
MeshRenderer * mTestPhong;
MeshRenderer * mTestSpecular;
MeshRenderer * mTestDiffuse;
MeshRenderer * mTestAmbient;
std::vector<MeshRenderer *> mMeshes;
std::vector<Model *> mModels;
};
#endif // QTK_SCENE_H

5
lib/skybox.cpp
View File

@ -6,6 +6,7 @@
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ## ## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
##############################################################################*/ ##############################################################################*/
#include <scene.h>
#include <texture.h> #include <texture.h>
#include <skybox.h> #include <skybox.h>
@ -46,8 +47,8 @@ void Skybox::draw()
mProgram.bind(); mProgram.bind();
mCubeMap->bind(); mCubeMap->bind();
mProgram.setUniformValue("uProjectionMatrix", MainWidget::Projection()); mProgram.setUniformValue("uProjectionMatrix", Scene::Projection());
mProgram.setUniformValue("uViewMatrix", MainWidget::Camera().toMatrix()); mProgram.setUniformValue("uViewMatrix", Scene::Camera().toMatrix());
mProgram.setUniformValue("uTexture", 0); mProgram.setUniformValue("uTexture", 0);
glDrawElements(GL_TRIANGLES, mIndices.size(), glDrawElements(GL_TRIANGLES, mIndices.size(),
GL_UNSIGNED_INT, mIndices.data()); GL_UNSIGNED_INT, mIndices.data());

1
lib/skybox.h
View File

@ -15,7 +15,6 @@
#include <QOpenGLVertexArrayObject> #include <QOpenGLVertexArrayObject>
#include <camera3d.h> #include <camera3d.h>
#include <mainwidget.h>
#include <mesh.h> #include <mesh.h>