#version 460
layout (location = 0) in vec3 aPos;
layout (location = 1) in vec2 aTexCoord;
layout (location = 2) in vec3 aNormal;
layout (location = 3) in vec3 aTangent;
layout (location = 4) in vec3 aBitangent;
uniform mat4 MVP;
uniform mat4 ModelMatrix;
uniform mat4 NormalRotationMatrix;
out vec2 TexCoord;
out vec4 WldPos;
out mat3 TBN;

out vec3 shadowSpacePos;

//out vec3 glPos;


uniform mat4 SunVP;


void main(){
    WldPos = ModelMatrix * vec4(aPos.xyz,1.0f);
    vec4 prepos = MVP * vec4(aPos,1.0f);

    gl_Position = vec4(prepos.x,-prepos.y,prepos.zw);

    TexCoord = aTexCoord;

    vec4 ShadowClipSpace = SunVP * ModelMatrix * vec4(aPos,1.0f);
    shadowSpacePos = ShadowClipSpace.xyz / ShadowClipSpace.w;


    vec3 T = normalize(vec3(NormalRotationMatrix * vec4(aTangent,   0.0f)));
    vec3 B = normalize(vec3(NormalRotationMatrix * vec4(aBitangent, 0.0f)));
    vec3 N = normalize(vec3(NormalRotationMatrix * vec4(aNormal,    0.0f)));
    TBN = mat3(T, B, N);
};