//
// Simple passthrough vertex shader
//
attribute vec3 in_Position;                  // (x,y,z)
attribute vec3 in_Normal;                  // (x,y,z)     unused in this shader.
attribute vec4 in_Colour;                    // (r,g,b,a)
attribute vec2 in_TextureCoord;              // (u,v)

varying vec2 v_vTexcoord;
varying vec4 v_vColour;
varying vec3 v_vNormal;

varying vec4 v_worldPosition;

void main() {
    vec4 object_space_pos = vec4( in_Position.x, in_Position.y, in_Position.z, 1.0);
    gl_Position = gm_Matrices[MATRIX_WORLD_VIEW_PROJECTION] * object_space_pos;
	
    v_worldPosition = (gm_Matrices[MATRIX_WORLD] * object_space_pos);
    v_vColour       = in_Colour;
    v_vTexcoord     = in_TextureCoord;
	
	vec3 worldNormal = normalize(gm_Matrices[MATRIX_WORLD] * vec4(in_Normal, 0.)).xyz;
	v_vNormal = worldNormal;
}