/// <summary>
/// 对实体进行离线绘图，生成Bitmap。
/// </summary>
/// <param name="ents">实体集合。</param>
/// <param name="imgWidth">图片分辨率宽度。</param>
/// <param name="imgHeight">图片分辨率高度。</param>
/// <param name="lowerLeft">模型空间截取窗口左下。</param>
/// <param name="upperRight">模型空间截取窗口右上。</param>
/// <returns></returns>
public static Bitmap Snapshort(IEnumerable <Entity> ents,
int imgWidth, int imgHeight, Point3d lowerLeft, Point3d upperRight)
{
var doc = Application.DocumentManager.MdiActiveDocument;
var graMgr = doc.GraphicsManager;
// 生成绘图用临时视图。
using (var view = new View())
{
var cvport = (short)Application.GetSystemVariable("CVPORT");
graMgr.SetViewFromViewport(view, cvport);
// 设置相机相关属性。
view.SetView(Point3d.Origin + Vector3d.ZAxis, Point3d.Origin,
Vector3d.YAxis, imgWidth, imgHeight);
var descriptor = new KernelDescriptor();
descriptor.addRequirement(KernelDescriptor.Drawing3D);
// 生成绘图设备。
using (var kernel = Manager.AcquireGraphicsKernel(descriptor))
{
using (var device = graMgr.CreateAutoCADOffScreenDevice(kernel))
{
device.OnSize(new Size(imgWidth, imgHeight));
device.DeviceRenderType = RendererType.Default;
device.BackgroundColor = Color.Black;
device.Add(view);
device.Update();
// 生成临时模型，添加绘图实体。
using (var model = graMgr.CreateAutoCADModel(kernel))
{
foreach (var ent in ents)
{
view.Add(ent, model);
}
}
// 对视图按指定截取窗口缩放。
view.ZoomExtents(lowerLeft, upperRight);
return(view.GetSnapshot(
new Rectangle(0, 0, imgWidth - 1, imgHeight - 1)));
}
}
}
}
Stream(ArrayList data, Manager mgr)
{
data.Add(new Snoop.Data.ClassSeparator(typeof(Manager)));
#if AC2012
data.Add(new Snoop.Data.ObjectUnknown("Display Size", mgr.DisplaySize));
#else
data.Add(new Snoop.Data.ObjectUnknown("Display Size", mgr.DeviceIndependentDisplaySize));
#endif
KernelDescriptor descriptor = new KernelDescriptor();
descriptor.addRequirement(Autodesk.AutoCAD.UniqueString.Intern("3D Drawing"));
GraphicsKernel kernal = Manager.AcquireGraphicsKernel(descriptor);
data.Add(new Snoop.Data.Object("Get DB Model", mgr.GetDBModel(kernal)));
data.Add(new Snoop.Data.Object("Get GUI Device", mgr.GetGUIDevice(kernal)));
}
public static System.Drawing.Image GetBlockImageFromDrawing(string blockName)
{
System.Drawing.Bitmap blockBmp = null;
Database db = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Database;
Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;
ObjectId BlockId = ObjectId.Null;
using (Transaction nativeTrans = db.TransactionManager.StartTransaction())
{
using (BlockTable bt = nativeTrans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable)
{
if (bt.Has(blockName))
{
BlockId = bt[blockName];
}
}
}
Manager gsm = doc.GraphicsManager;
// now set the block sizes to something standard
Point2d screenSize = (Point2d)Autodesk.AutoCAD.ApplicationServices.Application.GetSystemVariable("SCREENSIZE");
// set up the image sizes
int width = (int)screenSize.X;
int height = (int)screenSize.Y;
// now create an off screen device
KernelDescriptor descriptor = new KernelDescriptor();
descriptor.addRequirement(Autodesk.AutoCAD.UniqueString.Intern("3D Drawing"));
GraphicsKernel kernal = Manager.AcquireGraphicsKernel(descriptor);
using (Device offDevice = gsm.CreateAutoCADOffScreenDevice(kernal))
{
// now size the device
offDevice.OnSize(new System.Drawing.Size(width, height));
// now create the view
using (View view = new View())
{
// add the new view object to the device
offDevice.Add(view);
// update it
offDevice.Update();
// ok now create the model
using (Model model = gsm.CreateAutoCADModel(kernal))
{
using (Transaction nativeTrans = db.TransactionManager.StartTransaction())
{
using (BlockTable bt = nativeTrans.GetObject(db.BlockTableId, OpenMode.ForRead) as BlockTable)
{
// now iterate through our block tables
foreach (ObjectId id in bt)
{
if (id == BlockId)
{
// open the btr for read
using (BlockTableRecord btr = nativeTrans.GetObject(id, OpenMode.ForRead) as BlockTableRecord)
{
// add the btr to the view
view.Add(btr, model);
try
{
// get the extents of the btr
Extents3d extents = new Extents3d();
Vector3d buffer = new Vector3d(2, 2, 0);
extents.AddBlockExtents(btr);
_extMin = extents.MinPoint;
_extMax = extents.MaxPoint;
SetViewTo(view, db);
// snap the image
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(0, 0, width, height);
blockBmp = view.GetSnapshot(rect);
}
catch
{
}
// reset the view for the next iteration
view.EraseAll();
}
}
}
}
}
}
offDevice.EraseAll();
}
}
return(blockBmp);
}
