void OnCollisionEnter2D(Collision2D collision)
{
// check gameobject is still alive.
if (false == isStillAlive(gameObject, collision))
{
return;
}
//
// if tobeDestroyFlg is set, there is no more process to do.
//
if (GetToBeDestroyFlg() == true)
{
DestroyNode(gameObject, 0);
// update new edges after destroying the node.
loop.IterateEdgeForUpdatePrefab(UpdateEdge);
// if (checkPrefabNodeHasUniqueNodeIndex() == false)
// {
// Application.Quit();
// }
return;
}
//
// if both either of node is pre-spawn, collision cannot be executed.
//
if (canCollide(collision) == false)
{
return;
}
//
// Combine 2 nodes and tell the other node to be destroyed.
//
Vector2 middlePos = (collision.transform.position + transform.position) / 2.0f;
transform.position = middlePos;
NodeComponent otherNode = collision.gameObject.GetComponent <NodeComponent>();
int otherIndex = otherNode.GetNodeIndex();
// debug
// int upperBound = loop.edges.GetUpperBound(0);
// if (loop.nodes.Count != loop.numOfNodes || (upperBound+1) != loop.numOfDimension)
// {
// Application.Quit();
// }
// if( nodeIndex == (upperBound+1))
// {
// Application.Quit();
//}
// delete the disappear edge if any.
Edge edge = loop.GetEdge(nodeIndex, otherIndex);
if (edge != null)
{
Destroy(edge.GetEdgePrefab(), 0);
}
// combine 2 nodes.(actually delete both and craete new one.)
List <Edge> outEdgesMerge = new List <Edge>();
int newNodeIndex = loop.combineNodes(nodeIndex, otherIndex, middlePos, outEdgesMerge);
// Debug.Log("deleted node indecies : " + nodeIndex + "," + otherIndex);
// DebugOutNumberOfNodeAndEdge();
// create new one.
Node newNode = loop.GetNode(newNodeIndex);
Vector2 pos = new Vector2(newNode.GetXPos(), newNode.GetYPos());
GameObject nodePrefab = loopComponent.CreateNode(pos, newNodeIndex, newNode.getNodeValue());
newNode.SetNodePrefab(nodePrefab);
// delete disappear edges.
for (int i = 0; i < outEdgesMerge.Count; i++)
{
Destroy(outEdgesMerge[i].GetEdgePrefab(), 0.0f);
}
// tell the other node that these two nodes area dead.
otherNode.SetToBeDestroyFlg();
// destroy myself.
DestroyNode(this.gameObject, 0);
// destroy the other.
DestroyNode(collision.gameObject, 0);
}