Initial commit

resources/shaders/vertex/phong.vert

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+#version 330
+layout(location = 0) in vec3 aPosition;
+layout(location = 1) in vec3 aNormal;
+
+out vec3 vPosition;
+out vec3 vNormal;
+
+// 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);
+}
+
+void main()
+{
+  // Find normals, pass to fragment shader
+  vNormal = uMVP.normalMatrix * aNormal;
+  //  vNormal = aNormal; // This is possible without the additional uniform
+  // Or you could find this on the GPU using the uModel matrix
+  //  vNormal = mat3(transpose(inverse(uModel))) * aNormal;
+
+  // Set the vertex position to pass to fragment shader using only model matrix
+  vPosition = vec3(uMVP.model * vec4(aPosition, 1.0f));
+
+  // Set vertex gl_Position using MVP matrix
+  gl_Position = VertexPosition(uMVP, aPosition);
+}