Dynamic cube map generation and rendering

hi,
I succefully obtained a cube map at runtime
but in 6 GL_TEXTURE_2D only.
it looks correct on a textured cube.

I’m trying to use them with GL_TEXTURE_CUBE_MAP_ARB.
found some examples but i don’t know where i am wrong.
if you seen any error, notify me please
any comment is welcome.

/* UpdateCubeMap()*/

for (i=0;i<6;i++)
  { 
    glLoadIdentity();
    /* appropriate call to glulookat(); */
    glPushMatrix();
    glViewport(0,0,256,256);

    glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );

    RenderScene();

    glEnable(GL_TEXTURE_CUBE_MAP_ARB);
    glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, WP->textures[52] /*cube map texture*/);

    glCopyTexSubImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB+i, 0, 0, 0, 0, 0, 256, 256);
    glTexParameteri(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB+i,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB+i,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
    glTexParameteri(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB+i,GL_TEXTURE_WRAP_S,GL_CLAMP);
    glTexParameteri(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB+i,GL_TEXTURE_WRAP_T,GL_CLAMP);
    glDisable(GL_TEXTURE_CUBE_MAP_ARB);
  }
 

/* rendering */

 
glPushMatrix();

   glEnable(GL_TEXTURE_CUBE_MAP_ARB);
   glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, WP->textures[52] /*cube map texture*/);

   glTranslatef(...);
   glRotatef(...);
   glScalef(...);

   glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
   glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
   glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_ARB);
   glEnable(GL_TEXTURE_GEN_S);
   glEnable(GL_TEXTURE_GEN_T);
   glEnable(GL_TEXTURE_GEN_R);

     glutSolidTeapot(1.0);

   glDisable(GL_TEXTURE_GEN_S);
   glDisable(GL_TEXTURE_GEN_T);
   glDisable(GL_TEXTURE_GEN_R);
   glDisable(GL_TEXTURE_CUBE_MAP_ARB);

glPopMatrix();

thx

–
brucemangy

Maybe if you were to explain what goes wrong? Dropping a few glGetError() calls in there should also go a long way.

– Tom

yeah, this has been discussed at length in the beginners forum…

Ah! In that case…