public static void findCollisions(
final Spatial spatial, final Spatial scene, final CollisionResults results) {
if (spatial == scene
|| spatial.getWorldBound() == null
|| !spatial.getSceneHints().isPickingHintEnabled(PickingHint.Collidable)
|| !scene.getSceneHints().isPickingHintEnabled(PickingHint.Collidable)) {
return;
}
if (spatial instanceof Node) {
final Node node = (Node) spatial;
if (node.getWorldBound().intersects(scene.getWorldBound())) {
// further checking needed.
for (int i = 0; i < node.getNumberOfChildren(); i++) {
PickingUtil.findCollisions(node.getChild(i), scene, results);
}
}
} else if (spatial instanceof Mesh) {
final Mesh mesh = (Mesh) spatial;
if (mesh.getWorldBound().intersects(scene.getWorldBound())) {
if (scene instanceof Node) {
final Node parent = (Node) scene;
for (int i = 0; i < parent.getNumberOfChildren(); i++) {
PickingUtil.findCollisions(mesh, parent.getChild(i), results);
}
} else {
results.addCollision(mesh, (Mesh) scene);
}
}
}
}
public static boolean hasCollision(
final Spatial spatial, final Spatial scene, final boolean checkPrimitives) {
if (spatial == scene
|| spatial.getWorldBound() == null
|| !spatial.getSceneHints().isPickingHintEnabled(PickingHint.Collidable)
|| !scene.getSceneHints().isPickingHintEnabled(PickingHint.Collidable)) {
return false;
}
if (spatial instanceof Node) {
final Node node = (Node) spatial;
if (node.getWorldBound().intersects(scene.getWorldBound())) {
if (node.getNumberOfChildren() == 0 && !checkPrimitives) {
return true;
}
// further checking needed.
for (int i = 0; i < node.getNumberOfChildren(); i++) {
if (PickingUtil.hasCollision(node.getChild(i), scene, checkPrimitives)) {
return true;
}
}
}
} else if (spatial instanceof Mesh) {
final Mesh mesh = (Mesh) spatial;
if (mesh.getWorldBound().intersects(scene.getWorldBound())) {
if (scene instanceof Node) {
final Node parent = (Node) scene;
for (int i = 0; i < parent.getNumberOfChildren(); i++) {
if (PickingUtil.hasCollision(mesh, parent.getChild(i), checkPrimitives)) {
return true;
}
}
return false;
}
if (!checkPrimitives) {
return true;
}
return PickingUtil.hasTriangleCollision(mesh, (Mesh) scene);
}
return false;
}
return false;
}
public Object getChild(final Object parent, final int index) {
if (parent instanceof Node) {
final Node parentNode = (Node) parent;
return parentNode.getChild(index);
}
return null;
}
public static void findPick(final Spatial spatial, final Ray3 ray, final PickResults results) {
if (!spatial.getSceneHints().isPickingHintEnabled(PickingHint.Pickable)) {
return;
}
if (spatial instanceof Node) {
final Node node = (Node) spatial;
if (node.getNumberOfChildren() == 0 || node.getWorldBound() == null) {
return;
}
if (node.getWorldBound().intersects(ray)) {
// further checking needed.
for (int i = 0; i < node.getNumberOfChildren(); i++) {
PickingUtil.findPick(node.getChild(i), ray, results);
}
}
} else if (spatial instanceof Mesh) {
final Mesh mesh = (Mesh) spatial;
if (mesh.getWorldBound() == null) {
return;
}
if (mesh.getWorldBound().intersects(ray)) {
// find the primitive that is being hit.
// add this node and the primitive to the PickResults list.
results.addPick(ray, mesh);
}
}
}
/**
* Recreate this Collision Tree for the given Node and child index.
*
* @param childIndex the index of the child to generate the tree for.
* @param parent The Node that this tree should represent.
* @param doSort true to sort primitives during creation, false otherwise
*/
public void construct(
final int childIndex, final int section, final Node parent, final boolean doSort) {
final Spatial spat = parent.getChild(childIndex);
if (spat instanceof Mesh) {
_mesh = makeRef((Mesh) spat);
_primitiveIndices = new int[((Mesh) spat).getMeshData().getPrimitiveCount(section)];
for (int i = 0; i < _primitiveIndices.length; i++) {
_primitiveIndices[i] = i;
}
createTree(section, 0, _primitiveIndices.length, doSort);
}
}