private void clearPathDisplay()
{
if (SourceNode != null && TargetNode != null)
{
for (int i = 0; i < path.Count - 1; i++)
ChangeEdgeColor(g.GetEdge(path[i], path[i + 1]), EdgeColor);
ChangeNodeColor(SourceNode, NodeColor);
ChangeNodeColor(TargetNode, NodeColor);
SourceNode = null;
TargetNode = null;
}
else if (SourceNode != null && TargetNode == null)
{
ChangeNodeColor(SourceNode, NodeColor);
SourceNode = null;
}
else if (SourceNode == null && TargetNode != null)
{
for (int i = 0; i < path.Count - 1; i++)
ChangeEdgeColor(g.GetEdge(path[i], path[i + 1]), EdgeColor);
ChangeNodeColor(TargetNode, NodeColor);
TargetNode = null;
}
}
private void checkForClickedNode(Vector2 clickPosition,
bool leftAltPressed, bool rightAltPressed)
{
PositionalNode nodeClicked = null;
PathNodeRadar nodeRadar = new PathNodeRadar(clickPosition, g);
List<PositionalNode> adjacentNodes;
nodeRadar.AdjacentNodes(out adjacentNodes);
foreach (PositionalNode n in adjacentNodes)
{
Vector2 mouseToNode = n.Position - clickPosition;
if (mouseToNode.LengthSquared() < nodeRadius * nodeRadius)
{
nodeClicked = n;
break;
}
}
if (nodeClicked != null)
{
if (leftAltPressed && !rightAltPressed)
{
if (SourceNode != null)
ChangeNodeColor(SourceNode, NodeColor);
SourceNode = nodeClicked;
ChangeNodeColor(nodeClicked, Color.White);
}
else if (!leftAltPressed && rightAltPressed)
{
if (TargetNode != null)
ChangeNodeColor(TargetNode, NodeColor);
TargetNode = nodeClicked;
ChangeNodeColor(nodeClicked, Color.Black);
}
}
}
public void ChangeNodeColor(PositionalNode n, Color c)
{
nodeColors[n.Index] = c;
}