void OnTileClick(
Image img,
TilePos pos
)
{
switch (ctrlCtx.getCurrentToolFcn())
{
case ToolKind.paint:
AssignTile(img, pos, ctrlCtx.getCurrentSpriteFcn());
break;
case ToolKind.fill:
Fill(pos, ctrlCtx.getCurrentSpriteFcn());
break;
case ToolKind.erase:
ClearTile(img, pos);
break;
case ToolKind.pick:
var id = layer.Get(pos.x, pos.y);
if (id != 0)
{
ctrlCtx.setSpriteFcn(id);
}
break;
}
}
void Fill(
TilePos startPos,
SpriteRecord sprite
)
{
// get starting tile kind
var matchID = layer.Get(startPos.x, startPos.y);
var visited = new HashSet <TilePos>();
var traverse = new List <TilePos>();
// add starting node to traverse list
traverse.Add(startPos);
// iterate through list of nodes to traverse
while (traverse.Count > 0)
{
var pos = traverse[0];
traverse.RemoveAt(0);
// update current node
AssignTile(imageMap[pos], pos, sprite);
visited.Add(pos);
// check/add neighbors
var neighbors = new TilePos[] {
new TilePos(pos.x - 1, pos.y),
new TilePos(pos.x + 1, pos.y),
new TilePos(pos.x, pos.y - 1),
new TilePos(pos.x, pos.y + 1),
};
foreach (var neighbor in neighbors)
{
// bounds
if (neighbor.x < 0 || neighbor.x >= layer.width || neighbor.y < 0 || neighbor.y >= layer.height)
{
continue;
}
// visited
if (visited.Contains(neighbor))
{
continue;
}
// already set to traverse
if (traverse.Contains(neighbor))
{
continue;
}
// non-matching tile
if (layer.Get(neighbor.x, neighbor.y) != matchID)
{
continue;
}
// tile matches
traverse.Add(neighbor);
}
}
}
void ClearTile(
Image img,
TilePos pos
)
{
if (img != null)
{
img.sprite = null;
img.color = new Color(0, 0, 0, 0);
}
layer.Set(pos.x, pos.y, 0);
}
public void AssignLayer(
Layer layer
)
{
this.layer = layer;
if (spritePrefab == null)
{
return;
}
// setup grid layout
var grid = GetComponent <GridLayoutGroup>();
if (grid == null)
{
return;
}
grid.constraint = GridLayoutGroup.Constraint.FixedColumnCount;
grid.constraintCount = layer.width;
grid.cellSize = new Vector2(ctrlCtx.project.tileWidth, ctrlCtx.project.tileHeight);
// iterate through grid
// -- start 0,0 representing top-left corner
for (var y = 0; y < layer.height; y++)
{
for (var x = 0; x < layer.width; x++)
{
var pos = new TilePos(x, y);
var spriteGO = UnityEngine.Object.Instantiate(spritePrefab, contentTransform);
var img = spriteGO.GetComponent <Image>();
var id = layer.Get(x, y);
if (img != null)
{
imageMap[pos] = img;
AssignTile(img, pos, ctrlCtx.lookupSpriteFcn(id));
}
// wire handlers
var btn = spriteGO.GetComponent <Button>();
if (btn != null)
{
btn.onClick.AddListener(() => OnTileClick(img, pos));
}
}
}
}
void AssignTile(
Image img,
TilePos pos,
SpriteRecord record
)
{
if (record == null)
{
return;
}
// assign sprite to image
if (img != null)
{
img.sprite = record.sprite;
img.color = Color.white;
}
// assign record id to layer
layer.Set(pos.x, pos.y, record.id);
}
