private void ValidateResolution(int tileResolution, TileInfo[] tiles)
{
for (var n = 0; n < tiles.Length; n++)
{
if ((tiles[n].Source.Width != tileResolution) || (tiles[n].Source.Height != tileResolution))
{
throw new Exception("Each texture in the atlas must be square, and of identical size to one another.");
}
}
}
public AtlasTileSet(TileInfo[] tiles)
{
var tileResolution = tiles[0].Source.Width;
ValidateResolution(tileResolution, tiles);
var atlasSize = CalculateAtlasSize(tiles.Length);
var textureSize = atlasSize * tileResolution;
var atlasBitmap = new Bitmap(textureSize, textureSize);
var x = 0;
var y = 0;
using (var graphics = Graphics.FromImage(atlasBitmap))
{
graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
for (var n = 0; n < tiles.Length; n++)
{
tiles[n].Source.Render(graphics, x, y);
x += tileResolution;
if (x >= textureSize)
{
x = 0;
y += tileResolution;
if (y >= textureSize)
{
throw new Exception("The texture atlas is too small.");
}
}
}
}
var atlasTexture = new Texture2D(atlasBitmap.Width, atlasBitmap.Height)
{
MinificationFilter = TextureMinFilter.Nearest,
MagnificationFilter = TextureMagFilter.Nearest
};
atlasTexture.WriteRegion(atlasBitmap);
Initialize(atlasTexture, atlasSize, atlasSize);
for (var n = 0; n < tiles.Length; n++)
{
SetTileName(n, tiles[n].Name);
}
}