cube mapping TROUBLE!!!!

Luke Miklos · 2003-11-18T09:20:34

Alright... I''ve looked online a TON & have ended up writing my cubemap code as stated below. The problem I''m having is that the sphere that I''m cube-mapping to is white, no matter what. Always white. Check it out... Oh ya... you''ll notice that I''m actually capturing 12 textures... 6 are just 2D textures so I could see display them on 6 polygons off the to side of the scene just to verify that I was rendering the 6 images correctly for the cube map. GLuint cmap; GLuint CUBE_TEXTURES[6]; //THIS IS IN THE INIT ROUTINE (ran once at start of program) q = gluNewQuadric(); gluQuadricNormals(q, GL_SMOOTH); gluQuadricOrientation(q,GLU_OUTSIDE); gluQuadricDrawStyle(q, GLU_FILL); gluQuadricTexture(q, GL_TRUE); glEnable(GL_NORMALIZE); glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_EXT); glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_EXT); glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_EXT); //PARAMETER OPTION 1 glTexParameteri(GL_TEXTURE_CUBE_MAP_EXT, GL_TEXTURE_MIN_FILTER,GL_NEAREST); glTexParameteri(GL_TEXTURE_CUBE_MAP_EXT, GL_TEXTURE_MAG_FILTER,GL_NEAREST); //TRIED GL_LINEAR too glGenTextures(1,&cmap); glGenTextures(6,&CUBE_TEXTURES[0]); //THIS IS WHERE WE RENDER THE SCENE 6 times & capture a texture //for each "camera view" (runs every frame) GLuint cube_directions[6] = {RIGHT,LEFT,UP,DOWN,BLACK,FLAT}; GLenum cube_faces[6]={ GL_TEXTURE_CUBE_MAP_POSITIVE_X_EXT, GL_TEXTURE_CUBE_MAP_NEGATIVE_X_EXT, GL_TEXTURE_CUBE_MAP_POSITIVE_Y_EXT, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT, GL_TEXTURE_CUBE_MAP_POSITIVE_Z_EXT, GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT }; for(i=0;i<6;i++) { glClearColor(0.0f, 0.0f, 0.0f, 0.5); glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); glViewport(0,0,cmap_width,cmap_height); //DRAW CRAP HERE glBindTexture(GL_TEXTURE_2D,CUBE_TEXTURES); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); glReadPixels(0,0,cmap_width,cmap_height,GL_RGB, GL_UNSIGNED_BYTE,pixels); /*glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 0, 0,cmap_width,cmap_height, 0);*/ glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,cmap_width,cmap_height, 0,GL_RGB,GL_UNSIGNED_BYTE,pixels); glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_EXT); glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_EXT); glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_REFLECTION_MAP_EXT); glEnable(GL_TEXTURE_GEN_S); glEnable(GL_TEXTURE_GEN_T); glEnable(GL_TEXTURE_GEN_R); glEnable(GL_TEXTURE_CUBE_MAP_EXT); glBindTexture(GL_TEXTURE_CUBE_MAP_EXT, cmap); /*glCopyTexImage2D(cube_faces[i], 0, GL_RGB, 0,0,cmap_width,cmap_height, 0);*/ glTexImage2D(cube_faces[i],0,GL_RGB,cmap_width,cmap_height, 0,GL_RGB,GL_UNSIGNED_BYTE,pixels); glDisable(GL_TEXTURE_GEN_S); glDisable(GL_TEXTURE_GEN_T); glDisable(GL_TEXTURE_GEN_R); glDisable(GL_TEXTURE_CUBE_MAP_EXT); } //END OF FOR LOOP //DRAW CUBE MAPPED OBJECT NOW.... glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glViewport( 0, 0, 640, 480 ); glColor4f(1.0f,1.0f,1.0f,0.5f); glEnable(GL_DEPTH_TEST); glDisable(GL_BLEND); glLoadIdentity(); glTranslatef(0.0f,0.0f,board_depth); glRotatef(rotate_x,1.0f,0.0f,0.0f); glTranslatef(0.0f,translate_y,0.0f); glTranslatef(ball_x,ball_y,ball_radius); glEnable(GL_TEXTURE_CUBE_MAP_EXT); glEnable(GL_TEXTURE_GEN_S); glEnable(GL_TEXTURE_GEN_T); glEnable(GL_TEXTURE_GEN_R); glBindTexture(GL_TEXTURE_CUBE_MAP_EXT, cmap); gluSphere(q,ball_radius,64,64); glDisable(GL_TEXTURE_CUBE_MAP_EXT); glDisable(GL_TEXTURE_GEN_S); glDisable(GL_TEXTURE_GEN_T); glDisable(GL_TEXTURE_GEN_R); ANY HELP???????????????????? PLEASE!!!!!!!!!!!!!!!!!!!!!!

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Started by Luke Miklos November 14, 2003 08:09 PM

10 comments, last by Luke Miklos 20 years, 5 months ago

Luke Miklos

142

Author

November 17, 2003 05:13 PM

Intamin,
I just looked up the info on gluPerspective() & that looks like exactly what I was missing. Great!!! I will be sure to try that out tonight. Thanks. I think I was just resetting the viewport before without resetting the perspective. :/ DUH.

Halibut,
I tried rotating the scene by 180 on the Z axis before rendering it & the reflections DO appear right side up... they just scroll the wrong way on my sphere, either left to right, or north to south. So it does look pretty good, but if you do a point check... you''ll notice that its geometrically incorrect. Any quick suggestions? Otherwise I''ll keep trying crap, & eventually I''ll run across the fix.

Luke

Whatsoever you do, do it heartily as to the Lord, and not unto men.

Intamin AG

122

November 18, 2003 09:20 AM

glScalef(-1.0, -1.0, -1.0);

That''s all!

The world isn't unpredictable. It's CHAOTIC.

cube mapping TROUBLE!!!!

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cube mapping TROUBLE!!!!

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