private static RectangleTransform[] GenerateUVTransforms(Size originalSize, Size newSize, Rectangle[] sourceRects, Rectangle[] destinationRects)
{
var outputTransforms = new RectangleTransform[sourceRects.Length];
for (int i = 0; i < sourceRects.Length; i++)
{
Rectangle s = sourceRects[i];
Rectangle d = destinationRects[i];
var transform = new RectangleTransform
{
// figure out total image size and convert rects to percentages
Top = 1 - (s.Top / (double)originalSize.Height),
Bottom = 1 - (s.Bottom / (double)originalSize.Height),
Left = s.Left / (double)originalSize.Width,
Right = s.Right / (double)originalSize.Width,
OffsetX = (s.Left / (double)originalSize.Width) - (d.Left / (double)newSize.Width),
OffsetY = ((s.Top / (double)originalSize.Height) - (d.Top / (double)newSize.Height)),
ScaleX = (double)originalSize.Width / (double)newSize.Width,
ScaleY = (double)originalSize.Height / (double)newSize.Height
};
outputTransforms[i] = transform;
}
return(outputTransforms);
}
public void TransformUVsForTextureTile(SlicingOptions options, Vector2 textureTile, RectangleTransform[] uvTransforms, CancellationToken cancellationToken)
{
Trace.TraceInformation("Transforming UV points for texture tile {0},{1}", textureTile.X, textureTile.Y);
int newUVCount = 0, failedUVCount = 0, transformUVCount = 0;
cancellationToken.ThrowIfCancellationRequested();
var faces = Texture.GetFaceListFromTextureTile(
options.TextureSliceY,
options.TextureSliceX,
textureTile.X,
textureTile.Y,
this);
var uvIndices = faces.AsParallel().SelectMany(f => f.TextureVertexIndexList).WithCancellation(cancellationToken).Distinct();
var uvs = uvIndices.Select(i => TextureList[i - 1]).ToList();
Trace.TraceInformation("Selected UVs");
foreach (var uv in uvs)
{
cancellationToken.ThrowIfCancellationRequested();
var transforms = uvTransforms.Where(t => t.ContainsPoint(uv.OriginalX, uv.OriginalY));
if (transforms.Any())
{
RectangleTransform transform = transforms.First();
lock (uv)
{
if (uv.Transformed)
{
// This was already transformed in another extent, so we'll have to copy it
int newIndex = uv.CloneOriginal(TextureList);
TextureList[newIndex - 1].Transform(transform);
// Update all faces using the old UV in this extent
faces.AsParallel().Where(f => f.TextureVertexIndexList.Contains(uv.Index)).WithCancellation(cancellationToken).ForAll(face => face.UpdateTextureVertexIndex(uv.Index, newIndex, false));
newUVCount++;
}
else
{
uv.Transform(transform);
transformUVCount++;
}
}
}
else
{
failedUVCount++;
}
}
Trace.TraceInformation("UV Transform results ({3},{4}): {0} success, {1} new, {2} failed.", transformUVCount, newUVCount, failedUVCount, textureTile.X, textureTile.Y);
// Write out a marked up image file showing where lost UV's occured
if (options.Debug)
{
var notTransformedUVs = uvs.Where(u => !u.Transformed).ToArray();
var relevantTransforms = uvTransforms;
options.TextureInstance.MarkupTextureTransforms(options.Texture, relevantTransforms, notTransformedUVs, textureTile);
}
}