优化:DXF载入支持颜色

src/Add-on/DXFLoad.ts

@@ -47,6 +47,7 @@ export class Command_DXFImport
                                     let enpl = en as EntityLWPOLYLINE;
 
                                     let pl = new Polyline();
+                                    pl.ColorIndex = en.colorIndex ?? 7;
                                     pl.ApplyMatrix(this.GetMatrix4(en));
 
                                     pl.LineData = enpl.vertices.map(p =>
@@ -76,6 +77,7 @@ export class Command_DXFImport
                                     if (!equaln(enArc.startAngle, enArc.endAngle, 1e-3))
                                     {
                                         let arc = new Arc(AsVector3(enArc.center), enArc.radius, enArc.startAngle, enArc.endAngle, false);
+                                        arc.ColorIndex = en.colorIndex ?? 7;
                                         arc.ApplyMatrix(this.GetMatrix4(en));
                                         app.Database.ModelSpace.Append(arc);
                                     }
@@ -86,6 +88,7 @@ export class Command_DXFImport
                                     if (enCir.radius > 1e-3)
                                     {
                                         let cir = new Circle(AsVector3(enCir.center), enCir.radius);
+                                        cir.ColorIndex = en.colorIndex ?? 7;
                                         cir.ApplyMatrix(this.GetMatrix4(en));
                                         app.Database.ModelSpace.Append(cir);
                                     }
@@ -101,6 +104,7 @@ export class Command_DXFImport
                                         continue;
 
                                     let line = new Line(sp, ep);
+                                    line.ColorIndex = en.colorIndex ?? 7;
                                     app.Database.ModelSpace.Append(line);
                                 }
                                 else if (en.type === "TEXT")
@@ -108,6 +112,7 @@ export class Command_DXFImport
                                     let enText = en as EntityTEXT;
                                     if (!enText.text) continue;
                                     let text = new Text(AsVector3(enText.startPoint));
+                                    text.ColorIndex = en.colorIndex ?? 7;
                                     let mtx = this.GetMatrix4(enText);
                                     text.ApplyMatrix(mtx);
                                     text.TextString = enText.text;
@@ -128,6 +133,7 @@ export class Command_DXFImport
                                             break;
                                         case 34:
                                             let dim = new LineAngularDimension();
+                                            dim.ColorIndex = en.colorIndex ?? 7;
                                             let center = AsVector3(enDim.diameterOrRadiusPoint);
                                             let arcPoint = AsVector3(enDim.arcPoint);
                                             let p1 = AsVector3(enDim.linearOrAngularPoint1);