public void clipW(Point3D pA, Point3D pB, Point3D pC, int color) {
if (pA.w > pB.w) {
Point3D p = pA;
pA = pB;
pB = p;
}
if (pB.w > pC.w) {
Point3D p = pB;
pB = pC;
pC = p;
}
if (pA.w > pB.w) {
Point3D p = pA;
pA = pB;
pB = p;
}
if (pC.w < wmin) {
return;
}
if (pB.w < wmin) {
double t = (wmin - pC.w) / (pA.w - pC.w);
Point3D nv1 = pA.mul(t).add(pC.mul(1.0 - t));
t = (wmin - pC.w) / (pB.w - pC.w);
Point3D nv2 = pB.mul(t).add(pC.mul(1.0 - t));
dehomog(nv1, nv2, pC, color, fill);
return;
}
if (pA.w < wmin) {
double t = (wmin - pB.w) / (pA.w - pB.w);
Point3D nva = pA.mul(t).add(pB.mul(1.0 - t));
t = (wmin - pC.w) / (pA.w - pC.w);
Point3D nvb = pA.mul(t).add(pC.mul(1.0 - t));
dehomog(nva, nvb, pC, color, fill);
dehomog(nva, pB, pC, color, fill);
return;
}
dehomog(pA, pB, pC, color, fill);
}