static final boolean normalize(Vector3f v) {
float len = v.length();
if (len > 0) {
len = 1.0f / len;
v.x *= len;
v.y *= len;
v.z *= len;
return true;
}
return false;
}
static boolean getNormal(Point3f p1, Point3f p2, Point3f p3, Vector3f normal) {
Vector3f v1 = new Vector3f();
Vector3f v2 = new Vector3f();
// Must compute normal
v1.sub(p2, p1);
v2.sub(p2, p3);
normal.cross(v1, v2);
normal.negate();
float length = normal.length();
if (length > 0) {
length = 1 / length;
normal.x *= length;
normal.y *= length;
normal.z *= length;
return true;
}
return false;
}