How to create new map shapes for default PShapes Sphere box etc

Processing Beginners
1

Tryna create planar mapping xy for a sphere. How to change the default mapping? Some tutorial link?

2

I’ve never heard of any default mapping in Processing, but if you want to convert from 3d coordinates to UV coordinates, here’s how you do it:

float [] xyzToUV(PVector p, PVector center, float r) {  //p: point in 3d space, center: center of the sphere, r: radius of the sphere
  float [] ret = new int [2];  //u and v coordinates, u = [0, 2[, v = [0, 1[
  p.sub(center).div(r);  //transforming the point as if it was on a sphere with radius 1 centered at the origin
  ret[0] = atan2(p.z, p.x)/PI+2)%2;
  ret[1] = asin(p.y)/PI+0.5;
  return ret;
}

I hope this helps you
Best, Simon

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