Initial commit

resources/shaders/vertex/model-normals.vert

@@ -0,0 +1,68 @@
+#version 330 core
+layout (location = 0) in vec3 aPosition;
+layout (location = 1) in vec3 aNormal;
+layout (location = 2) in vec2 aTextureCoord;
+layout (location = 3) in vec3 aTangent;
+layout (location = 4) in vec3 aBitangent;
+
+struct Light {
+    vec3 position;
+
+// Light colors RGB value
+    vec3 ambient;
+    vec3 diffuse;
+    vec3 specular;
+};
+uniform Light uLight;
+
+out VS_OUT {
+    vec2 textureCoord;
+    vec3 position;
+    vec3 normal;
+    vec3 tangentLight;
+    vec3 tangentView;
+    vec3 tangentFrag;
+    Light light;
+} vOut;
+
+// Model View Projection matrix found by P * V * M
+struct MVP {
+    mat4 model;
+    mat4 view;
+    mat4 projection;
+// Additional uniform to allow CPU to provide mat3(transpose(inverse(uModel)))
+// + Makes a big difference in quality of diffuse shading
+// + QMatrix4x4.normalMatrix() returns a mat3 that can be used as a uniform
+    mat3 normalMatrix;
+};
+uniform MVP uMVP;
+
+vec4 VertexPosition(in MVP mvp, in vec3 position)
+{
+    return mvp.projection * mvp.view * mvp.model * vec4(position, 1.0f);
+}
+
+// Light object and camera position vectors
+uniform vec3 uCameraPosition;
+
+void main()
+{
+    // Finx TBN 3x3 matrix values for normals
+    vec3 T = normalize(vec3(uMVP.model * vec4(aTangent, 0.0)));
+    vec3 B = normalize(vec3(uMVP.model * vec4(aBitangent, 0.0)));
+    vec3 N = normalize(vec3(uMVP.model * vec4(aNormal, 0.0)));
+    mat3 TBN = transpose(mat3(T, B, N));
+
+    // Set tangent postiions for fragment shader
+    vOut.tangentLight = TBN * uLight.position;
+    vOut.tangentView = TBN * uCameraPosition;
+    vOut.tangentFrag = TBN * vec3(uMVP.model * vec4(aPosition, 1.0f));
+
+    // Set normal, position, and texture coordinate for frag shader
+    vOut.textureCoord = aTextureCoord;
+    vOut.normal = uMVP.normalMatrix * aNormal;
+    vOut.position = vec3(uMVP.model * vec4(aPosition, 1.0f));
+    vOut.light = uLight;
+
+    gl_Position = VertexPosition(uMVP, aPosition);
+}