public void initializeWithArray(Vector2 lowLeftBound, Vector2 upRightBound, Node.SquareType[][] terrainArr)
{
lowerLeftBound = lowLeftBound;
upperRightBound = upRightBound;
numXNodes = terrainArr[0].Length;
numYNodes = terrainArr.Length;
// Determine correct node density
float xDist = lowerLeftBound.x - upperRightBound.x;
nodeDensity = numXNodes / xDist;
// Magic number allows for proper drawing of nodes.
radii = 0.75f / nodeDensity;
numValidNodes = 0;
// Initialize the node array. Note the inverted y, normal x setup.
nodeArr = new Node[numYNodes][];
for (int y = 0; y < numYNodes; y++)
{
nodeArr[y] = new Node[numXNodes];
for (int x = 0; x < numXNodes; x++)
{
IntVec2 arrPos = new IntVec2(x, y);
Vector2 newPosV2 = ArrPosToWorldSpace(arrPos);
nodeArr[y][x] = new Node(transform.gameObject, nodeImg, newPosV2, arrPos, terrainArr[y][x], radii * 2, numValidNodes++);
//add up-left edge (inverse y)
if (allowedPaths > Paths.quadDir)
{
if (x - 1 >= 0 && y - 1 >= 0
&& isOkayToFloodDiag(arrPos, IntVec2.down, IntVec2.left))
nodeArr[y][x].addBidirEdge(nodeArr[y - 1][x - 1], sqrt2);
//add up-right edge (inverse y)
if (x + 1 < numXNodes && y - 1 >= 0
&& isOkayToFloodDiag(arrPos, IntVec2.down, IntVec2.right))
nodeArr[y][x].addBidirEdge(nodeArr[y - 1][x + 1], sqrt2);
}
//add up edge
if (y - 1 >= 0
&& isOkayToFloodUDLR(arrPos, IntVec2.down, (Vector2)IntVec2.left))
nodeArr[y][x].addBidirEdge(nodeArr[y - 1][x], 1);
//add left edge
if (x - 1 >= 0
&& isOkayToFloodUDLR(arrPos, IntVec2.left, (Vector2)IntVec2.up))
nodeArr[y][x].addBidirEdge(nodeArr[y][x - 1], 1);
}
}
isInitialized = true;
}
// Same, but with diagonals.
private bool isOkayToFloodDiag(IntVec2 startPos, IntVec2 dir1, IntVec2 dir2)
{
return true;
}
/// <summary>
/// Converts an array position to world space.
/// </summary>
/// <param name="pos">The position in array space.</param>
/// <returns>The position in world space.</returns>
public Vector2 ArrPosToWorldSpace(IntVec2 pos)
{
float x = pos.x / nodeDensity;
float y = pos.y / nodeDensity;
x += lowerLeftBound.x;
y += lowerLeftBound.y;
return new Vector2(x, y);
}
/// <summary>
/// null helper function for floodfill.
/// Returns true.
/// </summary>
/// <returns>true!</returns>
private bool isOkayToFloodUDLR(IntVec2 startPos, IntVec2 direction, Vector2 orthAngle)
{
return true;
}
// Same, but with diagonals.
private bool isOkayToFloodDiag(IntVec2 startPos, IntVec2 dir1, IntVec2 dir2)
{
IntVec2 newPos = startPos + dir1 + dir2;
IntVec2 orth = dir1 - dir2;
Vector2 orthAngle = ((Vector2) orth) / sqrt2;
Vector2 newPosV2 = ArrPosToWorldSpace(newPos);
Vector2 oldPosV2 = ArrPosToWorldSpace(startPos);
//Linecase uses width in consideration of spreading to new nodes, this time diagonally
return (!Physics2D.OverlapCircle(newPosV2, radii, LAYER_FILTER_MASK)
&& !Physics2D.Linecast(oldPosV2 + orthAngle * radii, newPosV2 + orthAngle * radii, LAYER_FILTER_MASK)
&& !Physics2D.Linecast(oldPosV2 - orthAngle * radii, newPosV2 - orthAngle * radii, LAYER_FILTER_MASK));
}
/// <summary>
/// Helper function for floodfill. Does extra checks / physics checks to see if we can add a node in the specified location.
/// </summary>
/// <param name="startPos">The position to start from.</param>
/// <param name="direction">The direction to go to.</param>
/// <param name="orthAngle">The orthogonal to the direction.</param>
/// <returns></returns>
private bool isOkayToFloodUDLR(IntVec2 startPos, IntVec2 direction, Vector2 orthAngle)
{
IntVec2 newPos = startPos + direction;
Vector2 newPosV2 = ArrPosToWorldSpace(newPos);
Vector2 oldPosV2 = ArrPosToWorldSpace(startPos);
//Linecase uses width in consideration of spreading to new nodes.
return (!Physics2D.OverlapCircle(newPosV2, radii, LAYER_FILTER_MASK)
&& !Physics2D.Linecast(oldPosV2 + orthAngle * radii, newPosV2 + orthAngle * radii, LAYER_FILTER_MASK)
&& !Physics2D.Linecast(oldPosV2 - orthAngle * radii, newPosV2 - orthAngle * radii, LAYER_FILTER_MASK));
}
/// <summary>
/// Fills all nodes in area and connects edges as necessesary.
/// Does not have stack overflow problems, but may create a graph
/// that isn't connected all the way through.
/// </summary>
private void fillAll()
{
for (int y = 0; y < numYNodes; y++)
{
for (int x = 0; x < numXNodes; x++)
{
IntVec2 arrPos = new IntVec2(x, y);
Vector2 newPosV2 = ArrPosToWorldSpace(arrPos);
#if DEBUG_PATHFINDER_UPDATELOOP
if (!Physics2D.OverlapCircle(newPosV2, radii, LAYER_FILTER_MASK))
#endif
{
nodeArr[y][x] = new Node(transform.gameObject, nodeImg, newPosV2, arrPos, Node.randWalkState(), radii * 2, numValidNodes++);
//add up-left edge (inverse y)
if (allowedPaths > Paths.quadDir)
{
if (x - 1 >= 0 && y - 1 >= 0
&& nodeArr[y - 1][x - 1] != null
&& isOkayToFloodDiag(arrPos, IntVec2.down, IntVec2.left))
nodeArr[y][x].addBidirEdge(nodeArr[y - 1][x - 1], sqrt2);
//add up-right edge (inverse y)
if (x + 1 < numXNodes && y - 1 >= 0
&& nodeArr[y - 1][x + 1] != null
&& isOkayToFloodDiag(arrPos, IntVec2.down, IntVec2.right))
nodeArr[y][x].addBidirEdge(nodeArr[y - 1][x + 1], sqrt2);
}
//add up edge
if (y - 1 >= 0
&& nodeArr[y - 1][x] != null
&& isOkayToFloodUDLR(arrPos, IntVec2.down, (Vector2)IntVec2.left))
nodeArr[y][x].addBidirEdge(nodeArr[y - 1][x], 1);
//add left edge
if (x - 1 >= 0
&& nodeArr[y][x - 1] != null
&& isOkayToFloodUDLR(arrPos, IntVec2.left, (Vector2)IntVec2.up))
nodeArr[y][x].addBidirEdge(nodeArr[y][x - 1], 1);
}
}
}
}
/// <summary>
/// Constructs a Node.
/// </summary>
/// <param name="floorImg">The image which the node will use to display itself if set to do so.</param>
/// <param name="position">Where the node is positioned in world space.</param>
/// <param name="gridPos">The node position in the graph space.</param>
/// <param name="scale">The node's visible scale.</param>
/// <param name="num">The node's internal number.</param>
/// <param name="vis">Whether the node is visible or not. Default is false.</param>
public Node(GameObject parent, Sprite floorImg, Vector2 position, IntVec2 gridPos, SquareType typeOfTerrain, float scale = 0.75f, int num = 0, bool vis = true)
{
pos = position;
this.gridPos = gridPos;
GameObject drawer = new GameObject("Node " + pos);
drawer.isStatic = true;
drawer.transform.parent = parent.transform;
//set sprite back in z, so it draws beneath everything.
drawer.transform.position = new Vector3(position.x, position.y, 1);
spriteDraw = drawer.AddComponent<SpriteRenderer>();
spriteDraw.sprite = floorImg;
drawer.tag = gameTag;
// Draw a little bigger than scale.
spriteDraw.transform.localScale = new Vector2(scale * 1.35f, scale * 1.35f);
// Draw with 50% alpha-white.
//spriteDraw.color = defColor;
//terrainType = randWalkState();
terrainType = typeOfTerrain;
edgePenalty = costOfWalkState(terrainType);
resetColor();
//spriteDraw.color = Random.ColorHSV(0.2f, 1.0f, 0.1f, 0.7f, 0.2f, 1.0f);
CameFrom = null;
number = num;
#if DEBUG_NODE_EDGES
lineDraw = drawer.AddComponent<LineRenderer>();
lineDraw.SetWidth(0.1f, 0.1f);
lineDraw.SetVertexCount(maxEdges * 2 + 1);
for (int i = 0; i < 17; i++)
lineDraw.SetPosition(i, pos);
#endif
#if DEBUG_NODE_TEXT
GameObject guiText = new GameObject("Debug text on Node " + pos);
Vector2 guiPos = new Vector2(Camera.main.WorldToScreenPoint(pos).x / Camera.main.pixelWidth,
Camera.main.WorldToScreenPoint(pos).y / Camera.main.pixelHeight);
guiText.transform.position = guiPos;
visNodeNum = guiText.AddComponent<GUIText>();
visNodeNum.text = num.ToString();
visNodeNum.anchor = TextAnchor.MiddleCenter;
#endif
// Do not move this, everything must be defined before calling Visible.
Visible = vis;
}
