texture & light

[wizzo]

here is my problem : i can load some sphere (they are a solar system), no problem.
aside, i can load a tga texture, no problem

but when i want both at the same time, i get the planet reder, but the texture is so so dark that i almost see it...

so the problem would be the render of a light on a texture... if anybody can help great thx

wizzo

[gunslinger]

hi there,
i had a similar problem with the rendering of a terrain. when i turned the lights on, pooof, all the land became dark. U simply have to supply the vertex normals for every vertex of the sphere. Boring but necessary. Lemme now if that was of any help. Bye and good luck, the Gunslinger

[wizzo]

ok thx
the problem is that i am a real beginner, and that i don't know how to do the normal to a sphere... can you help me doing it (i used glut for the sphere) ?
thx for your help, really - now if i dont know how to solve the problem, i know what it is which is good =D

wizzo

[nexusone]

Part of you problem maybe is that glutSolidSphere does not have any texture coors, only normals.

If you want to use a texture can use gluSphere and have it create normals and texture coords for you.

example:

sphere = gluNewQuadric();
gluQuadricDrawStyle( sphere, GLU_FILL);
gluQuadricNormals( sphere, GLU_SMOOTH); // Normals setting for glu objects
gluQuadricOrientation( sphere, GLU_OUTSIDE);
gluQuadricTexture( sphere, GL_TRUE); // Create texture coords.

If you want the complete code, look at glball demo on my website,uses glut for window creation and gluSphere:
www.angelfire.com/linux/nexusone/

Originally posted by wizzo:
ok thx
the problem is that i am a real beginner, and that i don't know how to do the normal to a sphere... can you help me doing it (i used glut for the sphere) ?
thx for your help, really - now if i dont know how to solve the problem, i know what it is which is good =D

wizzo

[This message has been edited by nexusone (edited 04-16-2003).]

[This message has been edited by nexusone (edited 04-16-2003).]

[wizzo]

hum.... gluquadric is to map the texture to the shere right ? my original problem was to apply a texture to a square, behind the sphere but i couldnt map a texture to a sphere too, so thx, that helped me too =) i'm gonna try that
wizzo