/**
* This is a <b>VERY </b> brute force method of detecting if two TriMesh objects intersect.
*
* @param mesh1 The first TriMesh.
* @param mesh2 The second TriMesh.
* @return True if they intersect, false otherwise.
*/
public static boolean meshIntersection(TriMesh mesh1, TriMesh mesh2) {
IntBuffer indexA = mesh1.getIndexBuffer();
IntBuffer indexB = mesh2.getIndexBuffer();
TransformMatrix aTransform = new TransformMatrix();
aTransform.setRotationQuaternion(mesh1.getWorldRotation());
aTransform.setTranslation(mesh1.getWorldTranslation());
aTransform.setScale(mesh1.getWorldScale());
TransformMatrix bTransform = new TransformMatrix();
bTransform.setRotationQuaternion(mesh2.getWorldRotation());
bTransform.setTranslation(mesh2.getWorldTranslation());
bTransform.setScale(mesh2.getWorldScale());
Vector3f[] vertA = BufferUtils.getVector3Array(mesh1.getVertexBuffer());
for (int i = 0; i < vertA.length; i++) aTransform.multPoint(vertA[i]);
Vector3f[] vertB = BufferUtils.getVector3Array(mesh2.getVertexBuffer());
for (int i = 0; i < vertB.length; i++) bTransform.multPoint(vertB[i]);
for (int i = 0; i < mesh1.getTriangleCount(); i++) {
for (int j = 0; j < mesh2.getTriangleCount(); j++) {
if (intersection(
vertA[indexA.get(i * 3 + 0)],
vertA[indexA.get(i * 3 + 1)],
vertA[indexA.get(i * 3 + 2)],
vertB[indexB.get(j * 3 + 0)],
vertB[indexB.get(j * 3 + 1)],
vertB[indexB.get(j * 3 + 2)])) return true;
}
}
return false;
}
