static OperationResult GenerateAtlasProcessTexture(TextureData current, ref GenerateAtlasData data)
{
if (data.CurrentRowYEnd != -1 && data.CurrentDim.y != current.TileDimension().y)
{
data.X = 0;
data.Y += (data.CurrentDim.y * (2 * k_repeatedPixels + data.TileWidthHeight));
data.CurrentRowYEnd = -1;
}
if (data.CurrentRowYEnd == -1)
{
data.CurrentDim = current.TileDimension();
data.CurrentRowYEnd = data.Y + (data.CurrentDim.y * (2 * k_repeatedPixels + data.TileWidthHeight));
if (data.CurrentRowYEnd > data.AtlasSize.y)
{
Debug.LogError("Atlas cannot be created because you run out of space!");
return(OperationResult.Error);
}
}
data.CurrentDim.x = current.TileDimension().x;
// copy texture
var tex = current.GetTexture(data.AtlasType);
if (tex != null)
{
CopyTextureToAtlas(tex, data.OutputTexture, data.X, data.Y);
}
var uVOffset = new Vector2((float)data.X / data.AtlasSize.x, (float)data.Y / data.AtlasSize.y);
if (data.AtlasType == EAtlasType.Default)
{
current.UVOffset = uVOffset;
}
data.X += data.CurrentDim.x * (2 * k_repeatedPixels + data.TileWidthHeight);
var nextXEnd = data.X + (data.CurrentDim.x * (2 * k_repeatedPixels + data.TileWidthHeight));
if (nextXEnd <= data.AtlasSize.x)
{
return(OperationResult.OK);
}
data.X = 0;
data.Y = data.CurrentRowYEnd;
data.CurrentRowYEnd = -1;
return(OperationResult.OK);
}
// ReSharper disable once FlagArgument
static Texture2D GenerateAtlas(LevelTextureConfig config, EAtlasType atlasType)
{
var textureCollections = config.LevelTextureCollections;
var tileWidthAndHeight = 2 * config.HalfTileDimension;
var atlasSize = new Vector2Int(config.AtlasDimension, config.AtlasDimension);
//int widthAndHeight = texWidthAndHeight + (repeatedPixels * 2);
var outputTexture = new Texture2D(config.AtlasDimension, config.AtlasDimension, TextureFormat.ARGB32, false);
config.UVInset = (float)k_repeatedPixels / config.AtlasDimension;
config.UVTileSize = (float)tileWidthAndHeight / atlasSize.x;
var allTexData = GatherAllTextures(textureCollections, config);
var data = new GenerateAtlasData()
{
AtlasType = atlasType,
OutputTexture = outputTexture,
CurrentDim = Vector2Int.zero,
AtlasSize = atlasSize,
TileWidthHeight = tileWidthAndHeight,
CurrentRowYEnd = -1,
X = 0,
Y = 0
};
//currentRowYStart = 0,
//blockXStart = 0,
//blockXEnd = -1,
//blockX = 0,
//blockY = 0;
var progressIndex = 0;
var initialCount = allTexData.Count;
while (allTexData.Count > 0)
{
EditorUtility.DisplayProgressBar("Generating Atlas", $"{progressIndex}/{initialCount}", (float)(progressIndex++) / initialCount);
var current = allTexData[0];
if (GenerateAtlasProcessTexture(current, ref data) == OperationResult.Error)
{
break;
}
allTexData.RemoveAt(0);
}
EditorUtility.ClearProgressBar();
return(outputTexture);
}
