glut_241.vert

#ifdef GL_ES
precision highp float;
#endif

// our vertex data
attribute vec3 aPosition;

//attribute vec2 aTexCoord;

varying vec2 vTexCoord;

void main ()
{
//  vTexCoord = aTexCoord;
  vTexCoord = aPosition.xy;

  // copy the position data into a vec4, using 1.0 as the w component
  vec4 positionVec4 = vec4 (aPosition, 1.0);

  positionVec4.xy = positionVec4.xy * 2.0 - 1.0;

  // send the vertex information on to the fragment shader
  gl_Position = positionVec4;
}