public static CSG Cylinder(CSGVector bottom, CSGVector top, int radius)
{
CylinderBottom = bottom;
CylinderTop = top;
CylinderRadius = radius;
ray = CylinderTop.minus(CylinderBottom);
int slices = 16;
axisZ = ray.unit();
int isY = Math.Abs(axisZ.y) > 0.5 ? 1 : 0;
axisX = new CSGVector(isY, 1 - isY, 0).cross(axisZ).unit();
axisY = axisX.cross(axisZ).unit();
CSGVertex start = new CSGVertex(CylinderBottom, axisZ.negated());
CSGVertex end = new CSGVertex(CylinderTop, axisZ.unit());
List <CSGPolygon> polygons = new List <CSGPolygon>();
for (int i = 0; i < slices; i++)
{
double t0 = (double)i / (double)slices;
double t1 = (double)(i + 1) / (double)slices;
polygons.Add(new CSGPolygon(start, point(0, t0, -1), point(0, t1, -1)));
polygons.Add(new CSGPolygon(point(0, t1, 0), point(0, t0, 0), point(1, t0, 0), point(1, t1, 0)));
polygons.Add(new CSGPolygon(end, point(1, t1, 1), point(1, t0, 1)));
}
return(CSG.fromPolygons(polygons));
}
