// Compiler should remove unneeded stuff
attribute vec3 vertex_position;
attribute vec3 vertex_normal;
attribute vec4 vertex_tangent;
attribute vec2 vertex_texCoord0;
attribute vec2 vertex_texCoord1;
attribute vec4 vertex_color;

uniform mat4 matrix_viewProjection;
uniform mat4 matrix_model;
uniform mat3 matrix_normal;
uniform vec3 view_position;

varying vec3 vPositionW;
varying vec3 vNormalW;
varying vec3 vTangentW;
varying vec3 vBinormalW;
varying vec2 vUv0;
varying vec2 vUv1;
varying vec4 vVertexColor;
varying vec3 vNormalV;

struct vsInternalData {
    vec3 positionW;
    mat4 modelMatrix;
    mat3 normalMatrix;
};


vec2 getUv0(inout vsInternalData data) {
    return vertex_texCoord0;
}

mat4 getModelMatrix(inout vsInternalData data) {
    return matrix_model;
}

vec3 getNormal(inout vsInternalData data) {
    data.normalMatrix = matrix_normal;
    return normalize(data.normalMatrix * vertex_normal);
}


vec4 getPosition(inout vsInternalData data) {
    data.modelMatrix = getModelMatrix(data);
    vec4 posW = data.modelMatrix * vec4(vertex_position, 1.0);
    data.positionW = posW.xyz;
    return matrix_viewProjection * posW;
}

vec3 getWorldPosition(inout vsInternalData data) {
    return data.positionW;
}


void main(void) {
   vsInternalData data;

   gl_Position = getPosition(data);
   vPositionW    = getWorldPosition(data);
   vNormalW    = getNormal(data);
   vUv0        = getUv0(data);
}