Texture mapping on gluDisk
- by Marnix
I'm trying to map a brick texture on the edge of a fountain and I'm using gluDisk for that. How can I make the right coordinates for the disk? My code looks like this and I have only found a function that takes the texture along with the camera.
I want the cubic texture to be alongside of the fountain, but gluDisk does a linear mapping. How do I get a circular mapping?
void Fountain::Draw()
{
glPushMatrix(); // push 1
this->ApplyWorldMatrixGL();
glEnable(GL_TEXTURE_2D); // enable texturing
glPushMatrix(); // push 2
glRotatef(90,-1,0,0); // rotate 90 for the quadric
// also drawing more here...
// stone texture
glBindTexture(GL_TEXTURE_2D, texIDs[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glPushMatrix(); // push 3
glTranslatef(0,0,height);
// spherical texture generation
// this piece of code doesn't work as I intended
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
glEnable(GL_TEXTURE_GEN_S);
glEnable(GL_TEXTURE_GEN_T);
GLUquadric *tub = gluNewQuadric();
gluQuadricTexture(tub, GL_TRUE);
gluDisk(tub, radius, outerR, nrVertices, nrVertices);
gluDeleteQuadric(tub);
glDisable(GL_TEXTURE_GEN_S);
glDisable(GL_TEXTURE_GEN_T);
glPopMatrix(); // pop 3
// more drawing here...
glPopMatrix(); // pop 2
// more drawing here...
glPopMatrix(); // pop 1
}
To refine my question a bit. This is an image of what it is at default (left) and of what I want (right). The texture should fit in the border of the disk, a lot of times. If this is possible with the texture matrix, than that's fine with me as well.
