varying vec3 myTexCoord;

 

uniform vec4 XPlane;

uniform vec4 YPlane;

uniform vec4 ZPlane;

 

mat3 Transpose(mat3 m)

{

  mat3 tmp;

  tmp[0][0] = m[0][0];

  tmp[0][1] = m[1][0];

  tmp[0][2] = m[2][0];

 

  tmp[1][0] = m[0][1];

  tmp[1][1] = m[1][1];

  tmp[1][2] = m[2][1];

 

  tmp[2][0] = m[0][2];

  tmp[2][1] = m[1][2];

  tmp[2][2] = m[2][2];

 

  return tmp;

}

 

void main(void) {

  vec4 EyeVertex = gl_ModelViewMatrix*gl_Vertex;

  mat3 InverseModelView = Transpose(gl_NormalMatrix);

  vec4 XEyePlane = vec4(vec3(XPlane)*InverseModelView,0.0);

  vec4 YEyePlane = vec4(vec3(YPlane)*InverseModelView,0.0);

  vec4 ZEyePlane = vec4(vec3(ZPlane)*InverseModelView,0.0);

 

  myTexCoord.s = dot(EyeVertex,XEyePlane);

  myTexCoord.t = dot(EyeVertex,YEyePlane);

  myTexCoord.p = dot(EyeVertex,ZEyePlane);

  gl_Position = ftransform();

}

 

vec4 ecPosition = gl_ModelViewMatrix * gl_Vertex;

gl_TexCoord[0].s = dot( ecPosition, gl_ObjectPlaneS[0] );

gl_TexCoord[0].t = dot( ecPosition, gl_ObjectPlaneT[0] );

gl_TexCoord[0].p = dot( ecPosition, gl_ObjectPlaneR[0] );

gl_TexCoord[0].q = dot( ecPosition, gl_ObjectPlaneQ[0] );