添加项目文件。

Mstn.Toolkit/External/PolyfaceProcessor.cs

@@ -0,0 +1,67 @@
+using System.Collections.Generic;
+
+using Bentley.DgnPlatformNET;
+using Bentley.DgnPlatformNET.Elements;
+using Bentley.GeometryNET;
+
+namespace Mstn.Toolkit.External
+{
+    public class PolyfaceProcessor : ElementGraphicsProcessor
+    {
+        private readonly IList<PolyfaceHeader> outputPolyface;
+        private readonly FacetOptions options;
+        private DTransform3d currentTransform;
+        public PolyfaceProcessor(ref IList<PolyfaceHeader> outputPolyface, FacetOptions options)
+        {
+            this.outputPolyface = outputPolyface;
+            currentTransform = DTransform3d.Identity;
+            this.options = options;
+        }
+
+        public override FacetOptions GetFacetOptions()
+        {
+            return options;
+        }
+
+        public override bool ProcessAsBody(bool isCurved)
+        {
+            return false;
+        }
+
+        public override bool ProcessAsFacets(bool isPolyface)
+        {
+            return true;
+        }
+
+        public override BentleyStatus ProcessFacets(PolyfaceHeader meshData, bool filled = false)
+        {
+            if (meshData.FacetCount == 0)
+            {
+                return BentleyStatus.Error;
+            }
+            PolyfaceHeader header = PolyfaceHeader.New();
+            header.CopyFrom(meshData);
+            header.TwoSided = true;
+            header.Transform(ref currentTransform, false);
+            outputPolyface.Add(header);
+
+            return BentleyStatus.Success;
+        }
+
+        public void Process(Element element)
+        {
+            ElementGraphicsOutput.Process(element, this);
+        }
+
+        public override void AnnounceTransform(DTransform3d transform)
+        {
+            currentTransform = transform != null ? transform : DTransform3d.Identity;
+
+        }
+
+        public override void AnnounceIdentityTransform()
+        {
+            currentTransform = DTransform3d.Identity;
+        }
+    }
+}