public boolean intersectsBoundingBox(BoundingBox bb) {
assert Vector3f.isValidVector(center) && Vector3f.isValidVector(bb.center);
if (FastMath.abs(bb.center.x - center.x) < getRadius() + bb.xExtent
&& FastMath.abs(bb.center.y - center.y) < getRadius() + bb.yExtent
&& FastMath.abs(bb.center.z - center.z) < getRadius() + bb.zExtent) {
return true;
}
return false;
}
private float getMaxAxis(Vector3f scale) {
float x = FastMath.abs(scale.x);
float y = FastMath.abs(scale.y);
float z = FastMath.abs(scale.z);
if (x >= y) {
if (x >= z) {
return x;
}
return z;
}
if (y >= z) {
return y;
}
return z;
}
public BoundingVolume transform(Matrix4f trans, BoundingVolume store) {
BoundingSphere sphere;
if (store == null || store.getType() != BoundingVolume.Type.Sphere) {
sphere = new BoundingSphere(1, new Vector3f(0, 0, 0));
} else {
sphere = (BoundingSphere) store;
}
trans.mult(center, sphere.center);
Vector3f axes = new Vector3f(1, 1, 1);
trans.mult(axes, axes);
float ax = getMaxAxis(axes);
sphere.radius = FastMath.abs(ax * radius) + RADIUS_EPSILON - 1f;
return sphere;
}