ifsrenderer-linux / Transforms / Crop_Cylinder.ifstf

@Name: Crop Cylinder
@Version: 1.2
@Tags: crop
@Description: Crop into a cylinder with the rotational axis along the Z axis, select visibility of inside, surface and edges (by Rychveldir)

@Hull: 0
@Edge: 0
@Inside: 1
@Radius: 0.5
@Zmin: -1
@Zmax: 1

float r = sqrt(p.x*p.x + p.y*p.y);
float nx = 0;
float ny = 0;
float nz = 0;
float ec = 0;

if (r > @Radius) {
  if (random(next) < @Hull) {
    p.x = @Radius*p.x/r;
    p.y = @Radius*p.y/r;
    ec += 1;
  } else {return discarded_point;}
}

if (p.z > @Zmax) {
  if (random(next) < @Hull) {
    p.z = @Zmax;
    ec += 1;
  } else { return discarded_point; }
}

if (p.z < @Zmin) {
  if (random(next) < @Hull) {
    p.z = @Zmin;
    ec += 1;
  } else { return discarded_point; }
}

if (ec > 1 && random(next) > @Edge)
	return discarded_point;

return p;