/// <summary>
/// Processes all of the Tiles and determines if they are an edge or not. Edgetiles get added to the list, and the
/// other tiles get water / land added to them.
/// </summary>
/// <param name="bmpData">The bmp data we arew processing</param>
/// <param name="gameWorldX">The game's x coordinate</param>
/// <param name="gameWorldY">The game's y coordinate</param>
private void ProcessTile(BmpData bmpData, int gameWorldX, int gameWorldY)
{
bool hasWater = false;
bool hasLand = false;
CheckEdges(bmpData, _graphicsTileSize, out hasWater, out hasLand);
if (hasLand && hasWater)
{
//We generate the edge connections for each tile just like they are by themselves.
//After all of the tiles are processed we will do a second pass to ensure everything is connected.
MapGraphicsTile mapGraphicsTile = new MapGraphicsTile();
_gameWorld.GameMap[gameWorldX, gameWorldY] = new MapTile(_mapGraphicsTileSet.EdgePlaceHolder);
mapGraphicsTile.TileType = TileType.EdgePlaceHolder;
_edgeTiles.Add(new Point(gameWorldX, gameWorldY), mapGraphicsTile);
}
else if (hasLand)
_gameWorld.GameMap[gameWorldX, gameWorldY] = new MapTile(_mapGraphicsTileSet.LandTile);
else
_gameWorld.GameMap[gameWorldX, gameWorldY] = new MapTile(_mapGraphicsTileSet.WaterTile);
//Need to release the locked bits here
bmpData.Dispose();
}
/// <summary>
/// Detemines if a GmapTile contains a transition in it.
/// </summary>
/// <param name="gmapX">The google maps X coordinates</param>
/// <param name="gmapY">The google maps Y coordinates</param>
/// <param name="gmapBitmap">The bitmap we are processing</param>
/// <returns>a value indicating if a tile has a transition in it. </returns>
private bool CheckGmapTilesForTransitions(int gmapX, int gmapY, Bitmap gmapBitmap, int zoomLevel, Point currentAbsolutePosition)
{
int offset = getOffSet(zoomLevel);
bool hasWater = false;
bool hasLand = false;
using (BmpData largeBmpData = new BmpData(gmapBitmap, 256))
CheckEdges(largeBmpData, 256, out hasWater, out hasLand);
//if we have land and water on the tile, then we need to Process it normally, otherwise we can skip all of that.
if (hasLand && hasWater)
return true;
MapGraphicsTile mapGraphicsTile = new MapGraphicsTile();
if (hasLand)
mapGraphicsTile= _mapGraphicsTileSet.LandTile;
else
mapGraphicsTile= _mapGraphicsTileSet.WaterTile;
MapTile mapTile = new MapTile(mapGraphicsTile);
for (int x = currentAbsolutePosition.X * _graphicsTileSize; x < (currentAbsolutePosition.X * _graphicsTileSize) + (_graphicsTileSize * offset); x++)
{
for (int y = currentAbsolutePosition.Y * _graphicsTileSize; y < (currentAbsolutePosition.Y * _graphicsTileSize) + (_graphicsTileSize * offset); y++)
{
_gameWorld.GameMap[x,y] = mapTile;
}
}
return false;
}
/// <summary>
/// Processes the gmap tile. splits the gmap tile up into smaller tiles and then checks each tile for the transitions.
/// </summary>
/// <param name="gmapX">The google maps X coordinates</param>
/// <param name="gmapY">The google maps Y coordinates</param>
/// <param name="gmapBitmap">The bitmap we are processing</param>
private void ProcessGmapTiles(int gmapX, int gmapY, Bitmap gmapBitmap)
{
//The bitmap coming in as 256x256 This needs to be broken down further into 16x16 sized
//tiles in order to get the proper size of the map
for (int tileX = 0; tileX < _graphicsTileSize; tileX++)
{
for (int tileY = 0; tileY < _graphicsTileSize; tileY++)
{
using (Bitmap smallBmp = new Bitmap(_graphicsTileSize, _graphicsTileSize))
{
using (Graphics gfx = Graphics.FromImage(smallBmp))
gfx.DrawImage(gmapBitmap,new Rectangle(0,0,16,16),tileX * _graphicsTileSize,tileY * _graphicsTileSize,16,16,GraphicsUnit.Pixel);
//#if DEBUG
smallBmp.Save("C:\\tiles\\smalltile" + ((gmapX * _graphicsTileSize) + tileX) + "-" + ((gmapY * _graphicsTileSize) + tileY) + ".jpg");
//#endif
BmpData bmpData = new BmpData(smallBmp, _graphicsTileSize);
ProcessTile(bmpData, (gmapX * _graphicsTileSize) + tileX, (gmapY * _graphicsTileSize) + tileY);
bmpData.Dispose();
}
}
}
}
/// <summary>
/// Checks the Edges of a Tile to determine if the tile contains land,water or both
/// </summary>
/// <param name="bmpData"></param>
/// <param name="tileSize"></param>
/// <param name="hasWater"></param>
/// <param name="hasLand"></param>
private void CheckEdges(BmpData bmpData, int tileSize, out bool hasWater, out bool hasLand)
{
hasWater = false;
hasLand = false;
bool retval;
//Loop though all of the pixels on the Y edge
for (int y = 0; y < tileSize; y++)
{
for (int x = 0; x < tileSize; x++)
{
int position = (y * bmpData.BitmapData.Stride) + (x * 4);
Color color = SetColor(bmpData.RgbValues[position], bmpData.RgbValues[position + 1], bmpData.RgbValues[position + 2]);
retval = IsWater(color);
if (retval == true)
hasWater = true;
else
hasLand = true;
if (hasLand && hasWater)
break;
//only check the left and right edges.
if (y != 0 && y != tileSize - 1)
x+= tileSize - 2;
}
if (hasLand && hasWater)
return;
}
}
