/**
* Check the two triangles of a given grid space for intersection.
*
* @param gridX grid row
* @param gridY grid column
* @param pick our pick ray
* @param intersection the store variable
* @param block the terrain block we are currently testing against.
* @return true if a pick was found on these triangles.
*/
protected boolean checkTriangles(
float gridX, float gridY, Ray pick, Vector3f intersection, TerrainBlock block) {
if (!getTriangles(gridX, gridY, block)) return false;
if (!pick.intersectWhere(_gridTriA, intersection)) {
return pick.intersectWhere(_gridTriB, intersection);
} else {
return true;
}
}
/** {@inheritDoc} */
public Vector3f getIntersection(Ray ray, Spatial parent, Vector3f store, boolean local) {
if (store == null) {
store = new Vector3f();
}
TrianglePickResults results = new TrianglePickResults();
results.setCheckDistance(true);
Vector3f[] vertices = new Vector3f[3];
parent.findPick(ray, results);
boolean hit = false;
if (results.getNumber() > 0) {
PickData data = results.getPickData(0);
ArrayList<Integer> triangles = data.getTargetTris();
if (!triangles.isEmpty()) {
TriMesh mesh = (TriMesh) data.getTargetMesh();
mesh.getTriangle(triangles.get(0).intValue(), vertices);
for (int j = 0; j < vertices.length; j++) {
mesh.localToWorld(vertices[j], vertices[j]);
}
hit = ray.intersectWhere(vertices[0], vertices[1], vertices[2], store);
if (hit && local) {
parent.worldToLocal(store, store);
return store;
} else if (hit && !local) {
return store;
}
}
}
return null;
}