public void PaintNodeType(NodeBehaviour node)
{
if (node)
{
node.GetComponentInChildren <MeshRenderer>().material.color = node.IsVisitable ? visitableColor : unvisitableColor;
}
}
public void PaintPathNode(NodeBehaviour node)
{
if (node)
{
node.GetComponentInChildren <MeshRenderer>().material.color = paintPathColor;
}
}
//Starts the pathfinding algorithm
public void StartPathfinding()
{
//You could create any pathfinder:
//var myPathFinder = new BFS(); / new GreedyBFS(); / new Dijkstra(); / new AStar();
//and calculate the path:
//INode[] path = myPathFinder.CalculatePath(start,end);
//Create pathfinder by the selected value on the Algorithm enum
IPathFinder pathFinder = CreatePathfinder(pathfindingAlgorithm);
if (pathFinder == null)
{
Debug.Log("Unsupported algorithm: " + pathfindingAlgorithm.ToString());
return;
}
//Check for start and end nodes
NodeBehaviour start = null;
NodeBehaviour end = null;
RaycastHit hitInfo;
if (Physics.Raycast(startPoint.position, Vector3.down, out hitInfo, Mathf.Infinity))
{
start = hitInfo.collider.transform.parent.GetComponent <NodeBehaviour>();
}
if (Physics.Raycast(endPoint.position, Vector3.down, out hitInfo, Mathf.Infinity))
{
end = hitInfo.collider.transform.parent.GetComponent <NodeBehaviour>();
}
//If everything is ready, calculates the path
if (start != null && end != null)
{
CleanPath(); //Clean previous painted path
lastPath = pathFinder.CalculatePath(start, end);
if (lastPath != null && lastPath.Length > 1)
{
if (paintCoroutine != null)
{
StopCoroutine(paintCoroutine);
}
paintCoroutine = StartCoroutine(PaintPathRoutine(lastPath, paintTimeDelay)); //Paint the path
}
else
{
Debug.LogWarning("There is not any path connecting start and end nodes.");
}
}
else
{
Debug.LogWarning("Can not find a path. Start (green) and End (red) points should be above a Node.");
}
}
//Use a raycast to check whether or not the mouse is pointing on a node before moving the object
private void OnMouseDrag()
{
RaycastHit hitInfo;
Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out hitInfo, Mathf.Infinity))
{
if (hitInfo.collider.transform.parent != null)
{
//Only move the object if it is on a node
NodeBehaviour node = hitInfo.collider.transform.parent.GetComponent <NodeBehaviour>();
if (node != null && node.IsVisitable)
{
int x = Mathf.RoundToInt(node.transform.position.x);
int z = Mathf.RoundToInt(node.transform.position.z);
transform.position = new Vector3(x, transform.position.y, z);
}
}
}
}
