To implement pathfinding in Delphi, you can use a graph data structure to represent the connections between different locations, and then use an algorithm like Dijkstra’s or A* to find the shortest path between two points. Here is an example of how you might implement this:
First, you will need to define a class to represent a node in your graph. This class should include at least two properties: a value to store the data associated with the node, and a list of edges that connect the node to other nodes in the graph. Here is an example of what this class might look like:
|
1 2 3 4 5 6 7 8 9 10 |
type TNode = class private FValue: Integer; FEdges: TList<TEdge>; public constructor Create(value: Integer); property Value: Integer read FValue; property Edges: TList<TEdge> read FEdges; end; |
Next, you will need to define a class to represent an edge in your graph. This class should include at least two properties: a reference to the node that the edge originates from, and a reference to the node that the edge connects to. Here is an example of what this class might look like:
|
1 2 3 4 5 6 7 8 9 10 |
type TEdge = class private FFromNode: TNode; FToNode: TNode; public constructor Create(fromNode: TNode, toNode: TNode); property FromNode: TNode read FFromNode; property ToNode: TNode read FToNode; end; |
After you have defined the classes to represent your nodes and edges, you can use them to construct your graph. To do this, you will need to create a list of nodes, and then create edges that connect these nodes together. Here is an example of how you might do this:
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 |
var nodeList: TList<TNode>; edgeList: TList<TEdge>; nodeA, nodeB, nodeC, nodeD: TNode; begin // Create a list of nodes nodeList := TList<TNode>.Create; // Add some nodes to the list nodeA := TNode.Create(1); nodeList.Add(nodeA); nodeB := TNode.Create(2); nodeList.Add(nodeB); nodeC := TNode.Create(3); nodeList.Add(nodeC); nodeD := TNode.Create(4); nodeList.Add(nodeD); // Create a list of edges edgeList := TList<TEdge>.Create; // Add some edges to the list edgeList.Add(TEdge.Create(nodeA, nodeB)); edgeList.Add(TEdge.Create(nodeA, nodeC)); edgeList.Add(TEdge.Create(nodeB, nodeD)); edgeList.Add(TEdge.Create(nodeC, nodeD)); // Add the edges to the nodes nodeA.Edges.AddRange(edgeList); nodeB.Edges.AddRange(edgeList); nodeC.Edges.AddRange(edgeList); nodeD.Edges.AddRange(edgeList); end; |
Leave a Reply