/// <summary>
/// Creates a new viewport that is a copy of the current instance.
/// </summary>
/// <returns>A new viewport that is a copy of this instance.</returns>
public override object Clone()
{
Viewport viewport = new Viewport
{
//EntityObject properties
Layer = (Layer) this.Layer.Clone(),
Linetype = (Linetype) this.Linetype.Clone(),
Color = (AciColor) this.Color.Clone(),
Lineweight = this.Lineweight,
Transparency = (Transparency) this.Transparency.Clone(),
LinetypeScale = this.LinetypeScale,
Normal = this.Normal,
IsVisible = this.IsVisible,
//viewport properties
Center = this.center,
Width = this.width,
Height = this.height,
Stacking = this.stacking,
Id = this.id,
ViewCenter = this.viewCenter,
SnapBase = this.snapBase,
SnapSpacing = this.snapSpacing,
GridSpacing = this.gridSpacing,
ViewDirection = this.viewDirection,
ViewTarget = this.viewTarget,
LensLength = this.lensLength,
FrontClipPlane = this.frontClipPlane,
BackClipPlane = this.backClipPlane,
ViewHeight = this.viewHeight,
SnapAngle = this.snapAngle,
TwistAngle = this.twistAngle,
CircleZoomPercent = this.circleZoomPercent,
Status = this.status,
UcsOrigin = this.ucsOrigin,
UcsXAxis = this.ucsXAxis,
UcsYAxis = this.ucsYAxis,
Elevation = this.elevation,
};
foreach (XData data in this.XData.Values)
viewport.XData.Add((XData) data.Clone());
if (this.boundary != null)
viewport.ClippingBoundary = (EntityObject) this.boundary.Clone();
viewport.FrozenLayers.AddRange(this.frozenLayers.ToArray());
return viewport;
}
private Viewport ReadViewport()
{
Debug.Assert(this.chunk.ReadString() == SubclassMarker.Viewport);
Viewport viewport = new Viewport();
Vector3 center = viewport.Center;
Vector2 viewCenter = viewport.ViewCenter;
Vector2 snapBase = viewport.SnapBase;
Vector2 snapSpacing = viewport.SnapSpacing;
Vector2 gridSpacing = viewport.GridSpacing;
Vector3 viewDirection = viewport.ViewDirection;
Vector3 viewTarget = viewport.ViewTarget;
Vector3 ucsOrigin = Vector3.Zero;
Vector3 ucsXAxis = Vector3.UnitX;
Vector3 ucsYAxis = Vector3.UnitY;
List<XData> xData = new List<XData>();
this.chunk.Next();
while (this.chunk.Code != 0)
{
switch (this.chunk.Code)
{
case 10:
center.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 20:
center.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 30:
center.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 40:
viewport.Width = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 41:
viewport.Height = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 68:
viewport.Stacking = this.chunk.ReadShort();
this.chunk.Next();
break;
case 69:
viewport.Id = this.chunk.ReadShort();
this.chunk.Next();
break;
case 12:
viewCenter.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 22:
viewCenter.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 13:
snapBase.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 23:
snapBase.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 14:
snapSpacing.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 24:
snapSpacing.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 15:
gridSpacing.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 25:
gridSpacing.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 16:
viewDirection.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 26:
viewDirection.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 36:
viewDirection.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 17:
viewTarget.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 27:
viewTarget.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 37:
viewTarget.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 42:
viewport.LensLength = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 43:
viewport.FrontClipPlane = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 44:
viewport.BackClipPlane = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 45:
viewport.ViewHeight = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 50:
viewport.SnapAngle = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 51:
viewport.TwistAngle = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 72:
viewport.CircleZoomPercent = this.chunk.ReadShort();
this.chunk.Next();
break;
case 331:
Layer layer = (Layer) this.doc.GetObjectByHandle(this.chunk.ReadString());
viewport.FrozenLayers.Add(layer);
this.chunk.Next();
break;
case 90:
viewport.Status = (ViewportStatusFlags) this.chunk.ReadInt();
this.chunk.Next();
break;
case 340:
// we will post process the clipping boundary in case it has been defined before the viewport
this.viewports.Add(viewport, this.chunk.ReadHex());
this.chunk.Next();
break;
case 110:
ucsOrigin.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 120:
ucsOrigin.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 130:
ucsOrigin.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 111:
ucsXAxis.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 121:
ucsXAxis.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 131:
ucsXAxis.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 112:
ucsYAxis.X = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 122:
ucsYAxis.Y = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 132:
ucsYAxis.Z = this.chunk.ReadDouble();
this.chunk.Next();
break;
case 1001:
string appId = this.DecodeEncodedNonAsciiCharacters(this.chunk.ReadString());
XData data = this.ReadXDataRecord(this.GetApplicationRegistry(appId));
xData.Add(data);
break;
default:
if (this.chunk.Code >= 1000 && this.chunk.Code <= 1071)
throw new Exception("The extended data of an entity must start with the application registry code.");
this.chunk.Next();
break;
}
}
viewport.Center = center;
viewport.ViewCenter = viewCenter;
viewport.SnapBase = snapBase;
viewport.SnapSpacing = snapSpacing;
viewport.GridSpacing = gridSpacing;
viewport.ViewDirection = viewDirection;
viewport.ViewTarget = viewTarget;
viewport.UcsOrigin = ucsOrigin;
viewport.UcsXAxis = ucsXAxis;
viewport.UcsYAxis = ucsYAxis;
viewport.XData.AddRange(xData);
return viewport;
}
private void WriteViewport(Viewport vp)
{
this.chunk.Write(100, SubclassMarker.Viewport);
this.chunk.Write(10, vp.Center.X);
this.chunk.Write(20, vp.Center.Y);
this.chunk.Write(30, vp.Center.Z);
this.chunk.Write(40, vp.Width);
this.chunk.Write(41, vp.Height);
this.chunk.Write(68, vp.Stacking);
this.chunk.Write(69, vp.Id);
this.chunk.Write(12, vp.ViewCenter.X);
this.chunk.Write(22, vp.ViewCenter.Y);
this.chunk.Write(13, vp.SnapBase.X);
this.chunk.Write(23, vp.SnapBase.Y);
this.chunk.Write(14, vp.SnapSpacing.X);
this.chunk.Write(24, vp.SnapSpacing.Y);
this.chunk.Write(15, vp.GridSpacing.X);
this.chunk.Write(25, vp.GridSpacing.Y);
this.chunk.Write(16, vp.ViewDirection.X);
this.chunk.Write(26, vp.ViewDirection.Y);
this.chunk.Write(36, vp.ViewDirection.Z);
this.chunk.Write(17, vp.ViewTarget.X);
this.chunk.Write(27, vp.ViewTarget.Y);
this.chunk.Write(37, vp.ViewTarget.Z);
this.chunk.Write(42, vp.LensLength);
this.chunk.Write(43, vp.FrontClipPlane);
this.chunk.Write(44, vp.BackClipPlane);
this.chunk.Write(45, vp.ViewHeight);
this.chunk.Write(50, vp.SnapAngle);
this.chunk.Write(51, vp.TwistAngle);
this.chunk.Write(72, vp.CircleZoomPercent);
foreach (Layer layer in vp.FrozenLayers)
this.chunk.Write(331, layer.Handle);
this.chunk.Write(90, (int) vp.Status);
if (vp.ClippingBoundary != null) this.chunk.Write(340, vp.ClippingBoundary.Handle);
this.chunk.Write(110, vp.UcsOrigin.X);
this.chunk.Write(120, vp.UcsOrigin.Y);
this.chunk.Write(130, vp.UcsOrigin.Z);
this.chunk.Write(111, vp.UcsXAxis.X);
this.chunk.Write(121, vp.UcsXAxis.Y);
this.chunk.Write(131, vp.UcsXAxis.Z);
this.chunk.Write(112, vp.UcsYAxis.X);
this.chunk.Write(122, vp.UcsYAxis.Y);
this.chunk.Write(132, vp.UcsYAxis.Z);
this.WriteXData(vp.XData);
}
private static void PaperSpace()
{
// Sample on how to work with Layouts
DxfDocument dxf = new DxfDocument();
// A new DxfDocument will create the default "Model" layout that is associated with the ModelSpace block. This layout cannot be erased or renamed.
Line line = new Line(new Vector2(0), new Vector2(100));
// The line will be added to the "Model" layout since this is the active one by default.
dxf.AddEntity(line);
// Create a new Layout, all new layouts will be associated with different PaperSpace blocks,
// while there can be only one ModelSpace multiple PaperSpace blocks might exist in the document
Layout layout1 = new Layout("Layout1");
// When the layout is added to the list, a new PaperSpace block will be created automatically
dxf.Layouts.Add(layout1);
// Set this new Layout as the active one. All entities will now be added to this layout.
dxf.ActiveLayout = layout1.Name;
// Create a viewport, this is the window to the ModelSpace
Viewport viewport1 = new Viewport
{
Width = 100,
Height = 100,
Center = new Vector3(50, 50, 0),
};
// Add it to the "Layout1" since this is the active one
dxf.AddEntity(viewport1);
// Also add a circle
Circle circle = new Circle(new Vector2(150), 25);
dxf.AddEntity(circle);
// Create a second Layout, add it to the list, and set it as the active one.
Layout layout2 = new Layout("Layout2");
dxf.Layouts.Add(layout2);
dxf.ActiveLayout = layout2.Name;
// viewports might have a non rectangular boundary, in this case we will use an ellipse.
Ellipse ellipse = new Ellipse(new Vector2(100), 200, 150);
Viewport viewport2 = new Viewport
{
ClippingBoundary = ellipse,
};
// Add the viewport to the document. This will also add the ellipse to the document.
dxf.AddEntity(viewport2);
Layout layout3 = new Layout("AnyName");
dxf.Layouts.Add(layout3);
//layout can also be renamed
layout3.Name = "Layout3";
//dxf.Layouts.Remove(layout2.Name);
ShowDxfDocumentInformation(dxf);
// Save the document as always.
dxf.Save("PaperSpace.dxf");
#region CAUTION - This is subject to change in the future, use it with care
// You cannot directly remove the ellipse from the document since it has been attached to a viewport
bool ok = dxf.RemoveEntity(ellipse); // OK = false
// If an entity has been attached to another, its reactor will point to its owner
// This information is subject to change in the future to become a list, an entity can be attached to multiple objects;
// but at the moment only the viewport clipping boundary make use of this.
// This is the way AutoCad also handles hatch and dimension associativity, that I might implement in the future
DxfObject reactor = ellipse.Reactors[0]; // in this case reactor points to viewport2
// You need to delete the viewport instead. This deletes the viewport and the ellipse
//dxf.RemoveEntity(viewport2);
// another way of deleting the ellipse, is first to assign another clipping boundary to the viewport or just set it to null
viewport2.ClippingBoundary = null;
// now it will be possible to delete the ellipse. This will not delete the viewport.
ok = dxf.RemoveEntity(ellipse); // OK = true
// Save the document if you want to test the changes
dxf.Save("PaperSpace.dxf");
#endregion
DxfDocument dxfLoad = DxfDocument.Load("PaperSpace.dxf");
// For every entity you can check its layout
// The entity Owner will return the block to which it belongs, it can be a *Model_Space, *Paper_Space, ... or a common block if the entity is part of its geometry.
// The block record stores information about the block and one of them is the layout, this mimics the way the dxf stores this information.
// Remember only the internal blocks *Model_Space, *Paper_Space, *Paper_Space0, *Paper_Space1, ... have an associated layout,
// all other blocks will return null is asked for block.Record.Layout
Layout associatedLayout = dxfLoad.Lines[0].Owner.Record.Layout;
// or you can get the complete list of entities of a layout
foreach (Layout layout in dxfLoad.Layouts)
{
List<DxfObject> entities = dxfLoad.Layouts.GetReferences(layout.Name);
}
// You can also remove any layout from the list, except the "Model".
// Remember all entities that has been added to this layout will also be removed.
// This mimics the behavior in AutoCad, when a layout is deleted all entities in it will also be deleted.
dxfLoad.Layouts.Remove(layout1.Name);
Layout layout4 = (Layout) layout2.Clone("Layout4");
dxfLoad.Layouts.Add(layout4);
ShowDxfDocumentInformation(dxfLoad);
dxfLoad.Save("PaperSpace removed.dxf");
}
