#version 430
layout(location = 0) uniform mat4 M;

layout(std140, binding = 0) uniform SceneUniforms
{
    mat4 PV;	//camera projection * view matrix
    vec4 eye_w;	//world-space eye position
};

layout(location = 0) in vec3 pos_attrib;
layout(location = 1) in vec2 tex_coord_attrib;
layout(location = 2) in vec3 normal_attrib;  

void main() {
    gl_Position = vec4(pos_attrib, 1.0);
}


// #version 400 core 
// layout(location = 0) uniform mat4 M;
// layout(location = 1) uniform float time;

// layout(std140, binding = 0) uniform SceneUniforms
// {
//     mat4 PV;	//camera projection * view matrix
//     vec4 eye_w;	//world-space eye position
// };

// layout(location = 0) in vec3 pos_attrib; //this variable holds the position of mesh vertices
// layout(location = 1) in vec2 tex_coord_attrib;
// layout(location = 2) in vec3 normal_attrib;  

// out VertexData
// {
//     vec2 tex_coord;
//     vec3 pw;       //world-space vertex position
//     vec3 nw;   //world-space normal vector
// } outData; 

// void main(void)
// {
//     gl_Position = PV*M*vec4(pos_attrib, 1.0); //transform vertices and send result into pipeline
    
//     //Use dot notation to access members of the interface block
//     outData.tex_coord = tex_coord_attrib;           //send tex_coord to fragment shader
//     outData.pw = vec3(M*vec4(pos_attrib, 1.0));		//world-space vertex position
//     outData.nw = vec3(M*vec4(normal_attrib, 0.0));	//world-space normal vector
// }