private Model3D ConvertVisualToModel3D(Visual visual, int dpi, ref double z)
{
Model3D model = null;
var bounds = VisualTreeHelper.GetContentBounds(visual);
if (visual is Viewport3D viewport3D)
{
bounds = new Rect(viewport3D.RenderSize);
}
if (this.includeEmptyVisuals)
{
bounds.Union(VisualTreeHelper.GetDescendantBounds(visual));
}
if (!bounds.IsEmpty && bounds.Width > 0 && bounds.Height > 0)
{
var mesh = new MeshGeometry3D();
mesh.Positions.Add(new Point3D(bounds.Left, bounds.Top, z));
mesh.Positions.Add(new Point3D(bounds.Right, bounds.Top, z));
mesh.Positions.Add(new Point3D(bounds.Right, bounds.Bottom, z));
mesh.Positions.Add(new Point3D(bounds.Left, bounds.Bottom, z));
mesh.TextureCoordinates.Add(new Point(0, 0));
mesh.TextureCoordinates.Add(new Point(1, 0));
mesh.TextureCoordinates.Add(new Point(1, 1));
mesh.TextureCoordinates.Add(new Point(0, 1));
mesh.Normals.Add(new Vector3D(0, 0, 1));
mesh.Normals.Add(new Vector3D(0, 0, 1));
mesh.Normals.Add(new Vector3D(0, 0, 1));
mesh.Normals.Add(new Vector3D(0, 0, 1));
mesh.TriangleIndices = new Int32Collection(new int[] { 0, 1, 2, 2, 3, 0 });
mesh.FreezeIfPossible();
var brush = this.MakeBrushFromVisual(visual, bounds, dpi);
var material = new DiffuseMaterial(brush);
material.FreezeIfPossible();
model = new GeometryModel3D(mesh, material);
((GeometryModel3D)model).BackMaterial = material;
z -= 1;
}
var childrenCount = VisualTreeHelper.GetChildrenCount(visual);
if (childrenCount > 0)
{
var group = new Model3DGroup();
if (model != null)
{
group.Children.Add(model);
}
for (var i = 0; i < childrenCount; i++)
{
if (VisualTreeHelper.GetChild(visual, i) is Visual childVisual)
{
var childModel = this.ConvertVisualToModel3D(childVisual, dpi, ref z);
if (childModel != null)
{
group.Children.Add(childModel);
}
}
}
model = group;
}
if (model != null)
{
var transform = VisualTreeHelper.GetTransform(visual);
var matrix = transform?.Value ?? Matrix.Identity;
var offset = VisualTreeHelper.GetOffset(visual);
matrix.Translate(offset.X, offset.Y);
if (!matrix.IsIdentity)
{
var matrix3D = new Matrix3D(matrix.M11, matrix.M12, 0, 0, matrix.M21, matrix.M22, 0, 0, 0, 0, 1, 0, matrix.OffsetX, matrix.OffsetY, 0, 1);
Transform3D transform3D = new MatrixTransform3D(matrix3D);
transform3D.FreezeIfPossible();
model.Transform = transform3D;
}
model.FreezeIfPossible();
}
return(model);
}