From 8521e4f3500b307ce684ba179833dece05a71abb Mon Sep 17 00:00:00 2001
From: zewen han <ww_0321@163.com>
Date: Thu, 28 Apr 2022 16:29:18 +0800
Subject: [PATCH] =?UTF-8?q?=E5=9D=97=E4=B8=AD=E5=9D=90=E6=A0=87=E5=92=8C?=
 =?UTF-8?q?=E5=9B=BE=E7=BA=B8=E5=9D=90=E6=A0=87=E8=BD=AC=E6=8D=A2?=
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---
 src/IFoxCAD.Cad/ExtensionMethod/Enums.cs      |  7 +++++-
 src/IFoxCAD.Cad/ExtensionMethod/GeometryEx.cs | 23 ++++++++++++++++++-
 tests/Test/testeditor.cs                      | 20 +++++++++++++++-
 3 files changed, 47 insertions(+), 3 deletions(-)

diff --git a/src/IFoxCAD.Cad/ExtensionMethod/Enums.cs b/src/IFoxCAD.Cad/ExtensionMethod/Enums.cs
index fc0fbaf..acec026 100644
--- a/src/IFoxCAD.Cad/ExtensionMethod/Enums.cs
+++ b/src/IFoxCAD.Cad/ExtensionMethod/Enums.cs
@@ -23,7 +23,12 @@ public enum CoordinateSystemCode
     /// <summary>
     /// 图纸空间坐标系
     /// </summary>
-    PDcs
+    PDcs,
+
+    /// <summary>
+    /// 块空间坐标系
+    /// </summary>
+    Dcs
 }
 
 /// <summary>
diff --git a/src/IFoxCAD.Cad/ExtensionMethod/GeometryEx.cs b/src/IFoxCAD.Cad/ExtensionMethod/GeometryEx.cs
index 84b57f7..8934727 100644
--- a/src/IFoxCAD.Cad/ExtensionMethod/GeometryEx.cs
+++ b/src/IFoxCAD.Cad/ExtensionMethod/GeometryEx.cs
@@ -544,7 +544,28 @@ public static Vector3d Wcs2Dcs(this Vector3d vec, bool atPaperSpace)
                 CoordinateSystemCode.Wcs, atPaperSpace ? CoordinateSystemCode.PDcs : CoordinateSystemCode.MDcs
             );
     }
-
+    /// <summary>
+    /// 某点在块内坐标系统和世界或者用户坐标系统的转换
+    /// </summary>
+    /// <param name="pt">要变换的点</param>
+    /// <param name="btr">要变换的块</param>
+    /// <param name="from">源坐标系</param>
+    /// <param name="to">目标坐标系</param>
+    /// <returns></returns>
+    public static Point3d TransNested(this Point3d pt, List<BlockReference> btrList, CoordinateSystemCode from, CoordinateSystemCode to)
+    {
+        if (from == CoordinateSystemCode.Ucs) pt = pt.Ucs2Wcs();
+        if (from == CoordinateSystemCode.Dcs) btrList.Reverse();
+        if (from == CoordinateSystemCode.Dcs || to == CoordinateSystemCode.Dcs)
+        {
+            foreach (var btr in btrList)
+            {
+                Matrix3d geom = to == CoordinateSystemCode.Dcs ? btr.BlockTransform.Inverse() : btr.BlockTransform;
+                pt = pt.TransformBy(geom);
+            }
+        }
+        return to == CoordinateSystemCode.Ucs ? pt.Wcs2Ucs() : pt;
+    }
     #endregion Ucs
 
 
diff --git a/tests/Test/testeditor.cs b/tests/Test/testeditor.cs
index 9c71a9a..9e02b0a 100644
--- a/tests/Test/testeditor.cs
+++ b/tests/Test/testeditor.cs
@@ -51,10 +51,28 @@ public void testzoomextent()
     [CommandMethod("testssget")]
     public void testssget()
     {
-        var ss = 
+        var ss =
 
         Env.Editor.SSGet(":S", messages: new string[2] { "get", "del" }, keywords: new string[2] { "A", "B" });
 
         Env.Print(ss);
     }
+
+    /// <summary>
+    /// 测试块中坐标和图纸坐标转换
+    /// </summary>
+    [CommandMethod("pointtest")]
+    public static void Testhot()
+    {
+        using var tr = new DBTrans();
+        Editor ed = Env.Editor;
+        PromptEntityResult BLK = ed.GetEntity("\n请选择一个图元：");
+        if (BLK.Status != PromptStatus.OK) return;
+        var blk = BLK.ObjectId.GetObject<BlockReference>();
+        List<BlockReference> blklist = new List<BlockReference>();
+        if (blk == null) return;
+        blklist.Add(blk);
+        Point3d p = new Point3d(4454, -1321, 0.0).TransNested(blklist, CoordinateSystemCode.Dcs, CoordinateSystemCode.Ucs);
+        ed.WriteMessage(p.ToString());
+    }
 }
-- 
Gitee