101 lines
3.2 KiB
C++
101 lines
3.2 KiB
C++
/*##############################################################################
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## Author: Shaun Reed ##
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## Legal: All Content (c) 2021 Shaun Reed, all rights reserved ##
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## About: Skybox class using QtOpenGL ##
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## ##
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## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
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##############################################################################*/
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#include <texture.h>
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#include <skybox.h>
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Skybox::Skybox(std::string right, std::string top, std::string front,
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std::string left, std::string bottom, std::string back,
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const std::string & name)
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: mCubeMap(Texture::initCubeMap(
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QImage(right.c_str()).mirrored(), QImage(top.c_str()),
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QImage(front.c_str()), QImage(left.c_str()),
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QImage(bottom.c_str()), QImage(back.c_str()))),
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mVBO(QOpenGLBuffer::VertexBuffer),
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mVertices(Cube(QTK_DRAW_ELEMENTS).vertices()),
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mIndices(Cube(QTK_DRAW_ELEMENTS).indices())
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{ init();}
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Skybox::Skybox(std::string name)
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: Skybox(":/right.png", ":/top.png", ":/front.png",
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":/left.png", ":/bottom.png", ":/back.png",
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name)
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{}
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Skybox::Skybox(QOpenGLTexture * cubeMap, const std::string & name)
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: mCubeMap(cubeMap) { init();}
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/*******************************************************************************
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* Public Member Functions
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******************************************************************************/
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void Skybox::draw()
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{
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glDepthFunc(GL_LEQUAL);
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glDepthMask(GL_FALSE);
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mVAO.bind();
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mProgram.bind();
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mCubeMap->bind();
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mProgram.setUniformValue("uProjectionMatrix", MainWidget::Projection());
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mProgram.setUniformValue("uViewMatrix", MainWidget::Camera().toMatrix());
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mProgram.setUniformValue("uTexture", 0);
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glDrawElements(GL_TRIANGLES, mIndices.size(),
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GL_UNSIGNED_INT, mIndices.data());
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mCubeMap->release();
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mProgram.release();
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mVAO.release();
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glDepthFunc(GL_LESS);
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glDepthMask(GL_TRUE);
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glActiveTexture(GL_TEXTURE0);
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}
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/*******************************************************************************
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* Private Member Functions
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******************************************************************************/
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void Skybox::init()
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{
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// Set up shader program
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mProgram.create();
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mProgram.addShaderFromSourceFile(QOpenGLShader::Vertex, ":/skybox.vert");
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mProgram.addShaderFromSourceFile(QOpenGLShader::Fragment, ":/skybox.frag");
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mProgram.link();
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mProgram.bind();
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// Setup VAO
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mVAO.create();
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mVAO.bind();
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// Setup VBO for vertex position data
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mVBO.create();
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mVBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
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mVBO.bind();
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// Allocate vertex positions into VBO
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mVBO.allocate(mVertices.data(),
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mVertices.size() * sizeof(mVertices[0]));
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// Enable attribute array for vertex positions
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mProgram.enableAttributeArray(0);
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mProgram.setAttributeBuffer(0, GL_FLOAT, 0,
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3, sizeof(QVector3D));
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// Set shader texture unit to 0
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mProgram.setUniformValue("uTexture", 0);
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mVAO.release();
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mVBO.release();
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mProgram.release();
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}
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