ATTRIBUTE vec2 aVert; // [0.0-1.0]                                   
                                                                             
        uniform mat3 uDestMatrix;                                            
        uniform mat3 uTexMatrix0;                                            
        uniform mat3 uTexMatrix1;                                            
                                                                             
        VARYING vec2 vTexCoord0;                                             
        VARYING vec2 vTexCoord1;                                             
                                                                             
        void main(void)                                                      
        {                                                                    
            vec2 destPos = (uDestMatrix * vec3(aVert, 1.0)).xy;              
            gl_Position = vec4(destPos * 2.0 - 1.0, 0.0, 1.0);               
                                                                             
            vTexCoord0 = (uTexMatrix0 * vec3(aVert, 1.0)).xy;                
            vTexCoord1 = (uTexMatrix1 * vec3(aVert, 1.0)).xy;                
        }