| public static CreateIndices ( int n ) : System.Windows.Media.Int32Collection | ||
| n | int | /// The number of points. /// |
| return | System.Windows.Media.Int32Collection | |
/// <summary>
/// Initializes a new instance of the <see cref="BillboardVisual3D" /> class.
/// </summary>
public BillboardVisual3D()
{
this.builder = new BillboardGeometryBuilder(this);
this.Mesh = new MeshGeometry3D
{
TriangleIndices = BillboardGeometryBuilder.CreateIndices(1),
TextureCoordinates =
new PointCollection
{
new Point(0, 1),
new Point(1, 1),
new Point(1, 0),
new Point(0, 0)
}
};
this.Model = new GeometryModel3D {
Geometry = this.Mesh
};
this.Content = this.Model;
this.OnMaterialChanged();
this.OnGeometryChanged();
}
/// <summary>
/// Updates the visual appearance (texture and geometry).
/// </summary>
private void VisualChanged()
{
this.meshes.Clear();
this.pinMeshes.Clear();
if (this.Items == null)
{
this.Content = null;
return;
}
var pinMaterial = new DiffuseMaterial(this.PinBrush);
var items = this.Items.Where(i => !string.IsNullOrEmpty(i.Text)).ToList();
var group = new Model3DGroup();
while (items.Count > 0)
{
Dictionary <string, FrameworkElement> elementMap;
Dictionary <FrameworkElement, Rect> elementPositions;
var material = TextGroupVisual3D.CreateTextMaterial(
items, this.CreateElement, this.Background, out elementMap, out elementPositions);
material.Freeze();
var billboards = new List <Billboard>();
var addedChildren = new List <BillboardTextItem>();
var textureCoordinates = new PointCollection();
foreach (var item in items)
{
var element = elementMap[item.Text];
var r = elementPositions[element];
if (r.Bottom > 1)
{
break;
}
billboards.Add(
new Billboard(
item.Position,
element.ActualWidth,
element.ActualHeight,
item.HorizontalAlignment,
item.VerticalAlignment,
item.DepthOffset,
item.WorldDepthOffset));
textureCoordinates.Add(new Point(r.Left, r.Bottom));
textureCoordinates.Add(new Point(r.Right, r.Bottom));
textureCoordinates.Add(new Point(r.Right, r.Top));
textureCoordinates.Add(new Point(r.Left, r.Top));
addedChildren.Add(item);
}
var triangleIndices = BillboardGeometryBuilder.CreateIndices(billboards.Count);
triangleIndices.Freeze();
var g = new MeshGeometry3D
{
TriangleIndices = triangleIndices,
TextureCoordinates = textureCoordinates,
Positions = this.builder.GetPositions(billboards, this.Offset)
};
group.Children.Add(new GeometryModel3D(g, material));
this.meshes.Add(g, billboards);
if (this.Offset.Length > 0)
{
var pinGeometry = new MeshGeometry3D
{
TriangleIndices = triangleIndices,
Positions = this.builder.GetPinPositions(billboards, this.Offset, this.PinWidth)
};
group.Children.Add(new GeometryModel3D(pinGeometry, pinMaterial));
this.pinMeshes.Add(pinGeometry, billboards);
}
foreach (var c in addedChildren)
{
items.Remove(c);
}
}
this.Content = group;
}
/// <summary>
/// Updates the text block when the visual appearance changed.
/// </summary>
private void VisualChanged()
{
this.meshes.Clear();
if (this.Items == null)
{
this.Content = null;
return;
}
var items = this.Items.Where(i => !string.IsNullOrEmpty(i.Text)).ToList();
var group = new Model3DGroup();
while (items.Count > 0)
{
Dictionary <string, FrameworkElement> elementMap;
Dictionary <FrameworkElement, Rect> elementPositions;
/// DELETED BY SJT FOR .NET 3.5
//var material = TextGroupVisual3D.CreateTextMaterial(items, this.CreateElement, this.Background, out elementMap, out elementPositions);
//material.Freeze();
var billboards = new List <Billboard>();
var addedChildren = new List <BillboardTextItem>();
var textureCoordinates = new PointCollection();
/// DELETED BY SJT FOR .NET 3.5
//foreach (var item in items)
//{
// var element = elementMap[item.Text];
// var r = elementPositions[element];
// if (r.Bottom > 1)
// {
// break;
// }
// billboards.Add(
// new Billboard(
// item.Position,
// element.ActualWidth,
// element.ActualHeight,
// item.HorizontalAlignment,
// item.VerticalAlignment,
// item.DepthOffset));
// textureCoordinates.Add(new Point(r.Left, r.Bottom));
// textureCoordinates.Add(new Point(r.Right, r.Bottom));
// textureCoordinates.Add(new Point(r.Right, r.Top));
// textureCoordinates.Add(new Point(r.Left, r.Top));
// addedChildren.Add(item);
//}
var g = new MeshGeometry3D
{
TriangleIndices = BillboardGeometryBuilder.CreateIndices(billboards.Count),
TextureCoordinates = textureCoordinates,
Positions = this.builder.GetPositions(billboards)
};
/// DELETED BY SJT FOR .NET 3.5
//group.Children.Add(new GeometryModel3D(g, material));
this.meshes.Add(g, billboards);
foreach (var c in addedChildren)
{
items.Remove(c);
}
}
this.Content = group;
}