//
// 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;

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_vColour = in_Colour;
    v_vTexcoord = in_TextureCoord;
}

//######################_==_YOYO_SHADER_MARKER_==_######################@~
varying vec2 v_vTexcoord;
varying vec4 v_vColour;

uniform vec2  dimension;

uniform int   selectionSize;
uniform float selection[64];
uniform float selectionGroup[640];

void main() {
    vec2 tx   = 1. / dimension;
    vec4 base = texture2D( gm_BaseTexture, v_vTexcoord );
    float bs  = base.r - 1.;
    gl_FragColor = vec4(0.);
    
    if(bs == -1.) return;
    
    for(int i = 0; i < selectionSize; i++) {
        float selInd = selection[i];
        if(selInd < 10000.) continue;
        
        int _arr = int(selInd - 10000.);
        int _len = int(selectionGroup[_arr * 64]);
        
        for(int k = 0; k < _len; k++) {
            float _subI = selectionGroup[_arr * 64 + 1 + k];
            if(_subI == -1.) continue;
            
            if(bs == _subI) {
                gl_FragColor = vec4(selInd, 0., 0., 1.);
                return;
            }
        }
    }
    
}