private void RenderHelper(IImageCombinerArg arg1, IImageCombinerArg arg2, IMaterial material, ITexture texture1, ITexture texture2)
{
Matrix32 transform1 = Matrix32.Scaling(arg1.Size) * arg1.CalcLocalToParentTransform();
Matrix32 transform2 = Matrix32.Scaling(arg2.Size) * arg2.CalcLocalToParentTransform();
// source rectangle
int numCoords = 4;
for (int i = 0; i < 4; i++)
{
coords[i] = rect[i] * transform1;
}
for (int i = 0; i < 4; i++)
{
stencil[i] = rect[i] * transform2;
}
bool clockwiseOrder = AreVectorsClockwiseOrdered(stencil[0], stencil[1], stencil[2]);
// clip invisible parts
for (int i = 0; i < 4; i++)
{
int j = (i < 3) ? i + 1 : 0;
Vector2 v1 = clockwiseOrder ? stencil[j] : stencil[i];
Vector2 v2 = clockwiseOrder ? stencil[i] : stencil[j];
ClipPolygonByLine(coords, ref numCoords, v1, v2);
}
if (numCoords < 3)
{
return;
}
// Эти матрицы переводят координаты вершин изображения в текстурные координаты.
Matrix32 uvTransform1 = transform1.CalcInversed();
Matrix32 uvTransform2 = transform2.CalcInversed();
Color4 color = arg1.Color * arg2.Color * Parent.AsWidget.GlobalColor;
for (int i = 0; i < numCoords; i++)
{
vertices[i].Pos = coords[i];
vertices[i].Color = color;
var uv1 = coords[i] * uvTransform1 * arg1.UVTransform;
var uv2 = coords[i] * uvTransform2 * arg2.UVTransform;
texture1?.TransformUVCoordinatesToAtlasSpace(ref uv1);
texture2?.TransformUVCoordinatesToAtlasSpace(ref uv2);
vertices[i].UV1 = uv1;
vertices[i].UV2 = uv2;
}
Renderer.DrawTriangleFan(material, vertices, numCoords);
}
bool GetArgs(out IImageCombinerArg arg1, out IImageCombinerArg arg2)
{
if (Parent != null)
{
int index = Parent.Nodes.IndexOf(this);
if (index < Parent.Nodes.Count - 2)
{
arg1 = Parent.Nodes[index + 1] as IImageCombinerArg;
arg2 = Parent.Nodes[index + 2] as IImageCombinerArg;
if (arg1 != null & arg2 != null)
{
return(true);
}
}
}
arg1 = arg2 = null;
return(false);
}
private ImageCombinerItem(ImageCombiner combiner, IImageCombinerArg arg1, IImageCombinerArg arg2)
{
Combiner = combiner;
Arg1 = arg1;
Arg2 = arg2;
}
