public void OutlineFromAlpha(IOutlineGenerator outlineGenerator, ITextureDataProvider textureDataProvider, float outlineDetail, byte alphaTolerance)
{
Debug.Assert(spriteMeshData != null, "Assert failed. Expected: spriteMeshData != null. Actual: spriteMeshData == null");
Debug.Assert(textureDataProvider != null, "Assert failed. Expected: textureDataProvider != null. Actual: textureDataProvider == null");
Debug.Assert(textureDataProvider.texture != null, "Assert failed. Expected: textureDataProvider.texture != null. Actual: textureDataProvider.texture == null");
int width, height;
textureDataProvider.GetTextureActualWidthAndHeight(out width, out height);
Vector2 scale = new Vector2(textureDataProvider.texture.width / (float)width, textureDataProvider.texture.height / (float)height);
Vector2 scaleInv = new Vector2(1f / scale.x, 1f / scale.y);
Vector2 rectOffset = spriteMeshData.frame.size * 0.5f;
Rect scaledRect = spriteMeshData.frame;
scaledRect.min = Vector2.Scale(scaledRect.min, scale);
scaledRect.max = Vector2.Scale(scaledRect.max, scale);
spriteMeshData.Clear();
Vector2[][] paths;
outlineGenerator.GenerateOutline(textureDataProvider, scaledRect, outlineDetail, alphaTolerance, false, out paths);
int vertexIndexBase = 0;
for (int i = 0; i < paths.Length; ++i)
{
int numPathVertices = paths[i].Length;
for (int j = 0; j <= numPathVertices; j++)
{
if (j < numPathVertices)
{
spriteMeshData.AddVertex(Vector2.Scale(paths[i][j], scaleInv) + rectOffset, default(BoneWeight));
}
if (j > 0)
{
spriteMeshData.edges.Add(new Edge(vertexIndexBase + j - 1, vertexIndexBase + j % numPathVertices));
}
}
vertexIndexBase += numPathVertices;
}
}
internal override void OnCreate()
{
m_Triangulator = new Triangulator();
m_OutlineGenerator = new OutlineGenerator();
m_WeightGenerator = new BoundedBiharmonicWeightsGenerator();
}
