source/lessons/instanced_rendering/planetary models/shaders/refr.vs.glsl


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#version 330 core
layout(location=0) in vec3 aPos;
layout(location=1) in vec3 aNormal;

uniform mat4 View;
uniform mat4 Model;
uniform mat4 Projection;

out vec3 Normal;
out vec3 Position;

void main() {
  // @note: This is the calculation for getting the normal vector
  // one that is unaffected by non-uniform scaling that is.
  // look at the lighting chapter in learnopengl.com to understand this more
  Normal = mat3(transpose(inverse(Model))) * aNormal;
  Position = vec3(Model * vec4(aPos, 1.0));
  gl_Position = Projection * View * Model * vec4(aPos, 1.0);
};