/**
* Adds a series of polygons by rotating the points list (ps) steps times, and colouring them as
* defined by the color array (stripes!).
*/
public void lathePolygons(float[][] ps, Color[] color, int steps) {
float _ps[][] = new float[ps.length][3];
float stepAngle = (float) Math.PI * 2 / steps; // the angle of each step in radians
int currColor = 0;
float m[][];
for (int step = 0; step < steps; step++) {
// translate each point to it next step round
m = Tools3d.rotateAboutZ(stepAngle);
for (int i = 0; i < ps.length; i++) {
Tools3d.applyTo(m, ps[i], _ps[i]);
}
// build the polygons
for (int point = 0; point < ps.length - 1; point++) {
this.addPolygon(
new float[][] {_ps[point], ps[point], ps[point + 1], _ps[point + 1]}, color[currColor]);
}
// copy the translated array to the starting array read for the next iteration
for (int i = 0; i < ps.length; i++) {
ps[i][0] = _ps[i][0];
ps[i][1] = _ps[i][1];
ps[i][2] = _ps[i][2];
}
currColor++;
if (currColor == color.length) {
currColor = 0;
}
}
}
