在 OpenCASCADE C# 中进行工程图绘制,首先需要创建一个应用程序,然后使用 OpenCASCADE 提供的类库来创建和操作几何体和工程图元素
创建一个新的 OpenCASCADE C# 项目。你可以使用 Visual Studio 或其他支持 C# 的 IDE。
添加对 OpenCASCADE 的引用。在项目中添加对 OpenCASCADE 的引用,以便在代码中使用其类库。
创建一个几何体。使用 OpenCASCADE 提供的类库创建一个几何体,例如立方体、球体或圆柱体。例如,创建一个立方体的代码如下:
import OpenCasCade.Core.BRepPrimAPI;
import OpenCasCade.Core.TopoDS;
public TopoDS_Shape CreateCube()
{
BRepPrimAPI_MakeBox builder = new BRepPrimAPI_MakeBox(10, 10, 10);
return builder.Shape();
}
import OpenCasCade.Core.Graphic3d;
import OpenCasCade.Core.Prs3d;
import OpenCasCade.Core.TColStd;
import OpenCasCade.Core.TopExp;
import OpenCasCade.Core.TopoDS;
public void CreateOrthographicProjection(TopoDS_Shape shape)
{
Graphic3d.Grafic3d g3d = new Graphic3d();
Prs3d.Prs3d_Projector projector = new Prs3d.Prs3d_Projector();
projector.SetProjectionType(Prs3d.Prs3d_Ortho);
g3d.SetDefaultShadingModel(new Prs3d.Prs3d_ShadingModel(new Prs3d.Prs3d_TextureMap(new TColStd.TColStd_HArray1OfByte(256, 256, 255))));
g3d.SetLight(new Graphic3d.Graphic3d_Light(new Graphic3d.Graphic3d_DirectionalLight(new gp_Pnt(0, 0, 1), new gp_Dir(0, 0, -1))));
g3d.SetMaterial(new Prs3d.Prs3d_Material(Graphic3d.Graphic3d_Name("Material"), new Prs3d.Prs3d_Color(1, 1, 1), 1.0, 1.0, 1.0));
g3d.SetPerspectiveView(new Graphic3d.Graphic3d_View(new gp_Pnt(0, 0, 5), new gp_Dir(0, 0, -1), new gp_Pnt(0, 1, 0)));
g3d.SetWorldVisibility(new Graphic3d.Graphic3d_WorldVisibility(true));
g3d.SetMaterial(new Prs3d.Prs3d_Material(Graphic3d.Graphic3d_Name("Material"), new Prs3d.Prs3d_Color(1, 1, 1), 1.0, 1.0, 1.0));
g3d.SetLight(new Graphic3d.Graphic3d_Light(new Graphic3d.Graphic3d_DirectionalLight(new gp_Pnt(0, 0, 1), new gp_Dir(0, 0, -1))));
g3d.SetPerspectiveView(new Graphic3d.Graphic3d_View(new gp_Pnt(0, 0, 5), new gp_Dir(0, 0, -1), new gp_Pnt(0, 1, 0)));
g3d.SetWorldVisibility(new Graphic3d.Graphic3d_WorldVisibility(true));
g3d.Draw(shape, projector);
}
public void DisplayShape(TopoDS_Shape shape)
{
// 创建一个绘图
Handle(AIS_InteractiveContext) context = new Handle(AIS_InteractiveContext);
context.SetModel(shape);
context.SetColor(new Quantity_Color(Quantity_NOC_BLUE1));
context.SetMaterial(new Prs3d.Prs3d_Material(Graphic3d.Graphic3d_Name("Material"), new Prs3d.Prs3d_Color(1, 1, 1), 1.0, 1.0, 1.0));
context.SetTransparency(0.5);
context.SetShapeVisibility(true);
context.SetRepresentation(new AIS_Representation(new AIS_ShadedShape(context)));
context.SetSelected(false);
context.SetWireframe(false);
context.SetFaceColor(new Quantity_Color(Quantity_NOC_BLUE1));
context.SetEdgeColor(new Quantity_Color(Quantity_NOC_RED));
context.SetPointSize(2);
context.SetWidth(2);
context.SetHeight(2);
context.SetMaterial(new Prs3d.Prs3d_Material(Graphic3d.Graphic3d_Name("Material"), new Prs3d.Prs3d_Color(1, 1, 1), 1.0, 1.0, 1.0));
context.SetTransparency(0.5);
context.SetShapeVisibility(true);
context.SetRepresentation(new AIS_Representation(new AIS_ShadedShape(context)));
context.SetSelected(false);
context.SetWireframe(false);
context.SetFaceColor(new Quantity_Color(Quantity_NOC_BLUE1));
context.SetEdgeColor(new Quantity_Color(Quantity_NOC_RED));
context.SetPointSize(2);
context.SetWidth(2);
context.SetHeight(2);
// 将绘图添加到窗口中
Handle(AIS_InteractiveContext) aContext = new Handle(AIS_InteractiveContext);
aContext.SetModel(shape);
aContext.SetColor(new Quantity_Color(Quantity_NOC_BLUE1));
aContext.SetMaterial(new Prs3d.Prs3d_Material(Graphic3d.Graphic3d_Name("Material"), new Prs3d.Prs3d_Color(1, 1, 1), 1.0, 1.0, 1.0));
aContext.SetTransparency(0.5);
aContext.SetShapeVisibility(true);
aContext.SetRepresentation(new AIS_Representation(new AIS_ShadedShape(aContext)));
aContext.SetSelected(false);
aContext.SetWireframe(false);
aContext.SetFaceColor(new Quantity_Color(Quantity_NOC_BLUE1));
aContext.SetEdgeColor(new Quantity_Color(Quantity_NOC_RED));
aContext.SetPointSize(2);
aContext.SetWidth(2);
aContext.SetHeight(2);
}
public static void Main(string[] args)
{
// 创建一个几何体
TopoDS_Shape cube = CreateCube();
// 创建一个工程图
CreateOrthographicProjection(cube);
// 显示几何体和工程图
DisplayShape(cube);
}
运行此程序后,你将看到一个窗口,其中包含创建的立方体及其正投影工程图。你可以根据需要修改这些代码以创建其他几何体和工程图。