/// <summary>
/// Determines the overall geometry of a single <see cref="Tileset"/> visual layer. This involves
/// tile boundaries in source and target data, as well as texture sizes and similar.
/// </summary>
/// <param name="renderInput"></param>
/// <param name="layerData"></param>
private LayerGeometry CalculateLayerGeometry(TilesetRenderInput renderInput, PixelData layerData)
{
LayerGeometry geometry;
// What's the space requirement for each tile?
geometry.SourceTileAdvance = renderInput.SourceTileAdvance;
geometry.TargetTileAdvance = renderInput.TargetTileAdvance;
// How many tiles will we have?
Point2 tileCount = renderInput.GetSourceTileCount(layerData.Width, layerData.Height);
geometry.SourceTilesPerRow = tileCount.X;
geometry.SourceTilesPerColumn = tileCount.Y;
geometry.SourceTileCount = geometry.SourceTilesPerRow * geometry.SourceTilesPerColumn;
geometry.TargetTileCount = geometry.SourceTileCount + this.generateTileSchedule.Count;
// What's the optimal texture size to include them all?
int minTilesPerLine = MathF.Max(1, (int)MathF.Sqrt(geometry.TargetTileCount));
geometry.TargetTextureSize.X = MathF.NextPowerOfTwo(geometry.TargetTileAdvance.X * minTilesPerLine);
int actualTilesPerLine = geometry.TargetTextureSize.X / geometry.TargetTileAdvance.X;
int requiredLineCount = 1 + (geometry.TargetTileCount / actualTilesPerLine);
geometry.TargetTextureSize.Y = MathF.NextPowerOfTwo(geometry.TargetTileAdvance.Y * requiredLineCount);
return(geometry);
}
/// <summary>
/// Looks up the source pixel coordinates for the specified input layer and tile.
/// </summary>
/// <param name="renderConfigIndex"></param>
/// <param name="tileIndex"></param>
/// <param name="pos"></param>
/// <param name="size"></param>
public void LookupTileSourceRect(int renderConfigIndex, int tileIndex, out Point2 pos, out Point2 size)
{
TilesetRenderInput input = this.renderConfig[renderConfigIndex];
Point2 advance = input.SourceTileAdvance;
Point2 tileCount = input.GetSourceTileCount(
input.SourceData.Res.Width,
input.SourceData.Res.Height);
Point2 tileCoords = new Point2(
tileIndex % tileCount.X,
tileIndex / tileCount.X);
size = input.SourceTileSize;
pos = new Point2(
tileCoords.X * advance.X,
tileCoords.Y * advance.Y);
}
/// <summary>
/// Determines the overall geometry of a single <see cref="Tileset"/> visual layer. This involves
/// tile boundaries in source and target data, as well as texture sizes and similar.
/// </summary>
/// <param name="renderInput"></param>
/// <param name="layerData"></param>
/// <returns></returns>
private LayerGeometry CalculateLayerGeometry(TilesetRenderInput renderInput, PixelData layerData)
{
LayerGeometry geometry;
// What's the space requirement for each tile?
geometry.SourceTileAdvance = renderInput.SourceTileAdvance;
geometry.TargetTileAdvance = renderInput.TargetTileAdvance;
// How many tiles will we have?
Point2 tileCount = renderInput.GetSourceTileCount(layerData.Width, layerData.Height);
geometry.SourceTilesPerRow = tileCount.X;
geometry.SourceTilesPerColumn = tileCount.Y;
geometry.SourceTileCount = geometry.SourceTilesPerRow * geometry.SourceTilesPerColumn;
geometry.TargetTileCount = geometry.SourceTileCount; // ToDo: Account for expanded AutoTiles
// What's the optimal texture size to include them all?
int minTilesPerLine = MathF.Max(1, (int)MathF.Sqrt(geometry.TargetTileCount));
geometry.TargetTextureSize.X = MathF.NextPowerOfTwo(geometry.TargetTileAdvance.X * minTilesPerLine);
int actualTilesPerLine = geometry.TargetTextureSize.X / geometry.TargetTileAdvance.X;
int requiredLineCount = 1 + (geometry.TargetTileCount / actualTilesPerLine);
geometry.TargetTextureSize.Y = MathF.NextPowerOfTwo(geometry.TargetTileAdvance.Y * requiredLineCount);
return geometry;
}
