1 varying vec2  texCoord;

     2 attribute vec4 vPosition;

     3 uniform float aspect;

     4 

     5 void main(void)

     6     {

     7     gl_Position = vPosition;

     8     texCoord = (vec2( gl_Position.x*aspect, - gl_Position.y ) + vec2( 1.0 ) ) / vec2( 2.0 );   

     9     }