#version 300 es

/*this will affect all the float guys (float, vecN, matN )*/
precision mediump float;

layout (location = 0) in vec3 vertPos;   // Attributo Posizione
layout (location = 1) in vec2 coord_uv; // Attributo texture
layout (location = 2) in vec3 vertNor;
layout (location = 3) in vec3 vertTan;
layout (location = 4) in vec3 vertBitan;

 uniform mat4 Model;
 uniform mat4 ModelRot;
 uniform mat4 Projection;
 uniform mat4 View;
 uniform vec3 boundingBoxLBN;
 uniform vec3 boundingBoxRTF;

 out vec3 fragPos;
 out vec2 frag_uv;
 out vec3 fragNormal;
 out vec3 fragBoundPos;
 out vec3 fragBaryc;

 out mat3 TBN;


void main()
{   
	frag_uv = coord_uv;
	vec3 normal = normalize(vertNor);

    vec3 T = normalize(vec3(ModelRot * vec4(vertTan, 0.0)));
    vec3 B = normalize(vec3(ModelRot * vec4(vertBitan, 0.0)));
    vec3 N = normalize(vec3(ModelRot * vec4(vertNor, 0.0)));
    TBN = mat3(T, B, N);

	vec3 boundPos = vertPos - boundingBoxLBN;
    vec3 boundDim = boundingBoxRTF - boundingBoxLBN;
    fragBoundPos = vec3( boundPos.x / boundDim.x, boundPos.y / boundDim.y, boundPos.z / boundDim.z);

    fragNormal = mat3(ModelRot) * vec3(normal);
    fragPos=(Model*vec4(vertPos,1)).xyz;
    fragBoundPos=(Model*vec4(boundPos,1)).xyz;
    gl_Position=Projection*View*Model*vec4(vertPos,1);
	fragBaryc = vec3(gl_VertexID % 3 == 0, gl_VertexID % 3 == 1, gl_VertexID % 3 == 2);
}