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Author |
Topic: texture on a sphere (Read 457 times) |
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tobt
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texture on a sphere
« on: Jul 20th, 2004, 5:21pm » |
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i would like to map a texture to a sphere.
in one thread i read about loading an image and place it with texture(theimage) in the beginShape, endShape term.
in another thread i read about to draw a sphere by using the following method. (from toxi.)
but how can i put these two elements together?
(How works the texture() - there is no reference)
thanks, tobt.
CODE:
void xsphere(float r) {
if (g.sphere_detail == 0) {
sphereDetail(30);
}
int sd=g.sphere_detail;
float[] sx=g.sphereX;
float[] sy=g.sphereY;
float[] sz=g.sphereZ;
int v1,v2;
push();
// scale(r); // REMOVED!!!
// 1st ring from south pole
beginShape(TRIANGLE_STRIP);
for (int i = 0; i <= sd; i++) {
v2 = i % sd;
vertex(0, -r, 0);
vertex(sx[v2]*r, sy[v2]*r, sz[v2]*r);
}
endShape();
// middle rings
int voff = 0;
for(int i = 2; i < sd; i++) {
voff += sd;
beginShape(TRIANGLE_STRIP);
for (int j = 0; j <= sd; j++) {
v1 = voff - sd + j % sd;
v2 = voff + j % sd;
vertex(sx[v1]*r, sy[v1]*r, sz[v1]*r);
vertex(sx[v2]*r, sy[v2]*r, sz[v2]*r);
}
endShape();
}
// add the northern cap
beginShape(TRIANGLE_STRIP);
for (int i = 0; i <= sd; i++) {
v2 = voff + i % sd;
vertex(0, r, 0);
vertex(sx[v2]*r, sy[v2]*r, sz[v2]*r);
}
endShape();
pop();
}
}
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| « Last Edit: Jul 20th, 2004, 5:21pm by tobt » |
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