VectorDraw常见问题合集，让你从菜鸡到大神（六）

    VectorDraw Developer Framework（VDF）是一个用于应用程序可视化的图形引擎库。有了VDF提供的功能，您可以轻松地创建、编辑、管理、输出、输入和打印2D和3D图形文件。   

VectorDraw web library (javascript)不仅能打开CAD图纸，而且能显示任何支持HTML5标准平台上的通用矢量对象，如Windows，安卓，iOS和Linux。无需任何安装，VectorDraw web library (javascript)就可以运行在任何支持canvas标签和Javascript的主流浏览器（Chrome, Firefox, Safari, Opera, Dolphin, Boat等等）中。这意味着可以用DXF，DWG，DGN，SKP（Google的Sketchup），VDML等多种格式在任何台式、平板电脑，智能手机和便携式笔记本上展现出你的业务。

问：

如何才能在绘制数字时混合渲染模式？能否有代码示例实现如下目标：

1. 使用Wire3D渲染绘制vdPolyface。

2. 使用Shade / Hide / ShadeOn / Render模式渲染绘制所有其他图形。

答：

想要实现目标可以采用以下代码：

private void Form1_Load(object sender, EventArgs e)
{
    vdFramedControl1.BaseControl.ActiveDocument.New();
    if (vdFramedControl1.BaseControl.ActiveDocument.CommandAction.CmdSphere(new gPoint(0, 0, 0), 3.0d, 6, 6)) 
    {
         vdFramedControl1.BaseControl.ActiveDocument.Model.Entities[vdFramedControl1.BaseControl.ActiveDocument.Model.Entities.Count - 1].Label = "WIRE3D"; // the sphere will be drawn as Wire3D
    }
    vdFramedControl1.BaseControl.ActiveDocument.CommandAction.CmdBox3d(new gPoint(5, 0, 0), 3.0d, 4.0d, 2.0d, 0.0d);
    vdFramedControl1.BaseControl.ActiveDocument.ZoomExtents();
    vdFramedControl1.BaseControl.ActiveDocument.FreezeEntityDrawEvents.Push(false);
    vdFramedControl1.BaseControl.ActiveDocument.GlobalRenderProperties.CustomRenderTypeName = "VectorDraw.Render.opengllist#VectorDraw.Professional.dll";
 
    vdFramedControl1.BaseControl.ActiveDocument.OnDrawFigure += new vdDocument.FigureDrawEventHandler(ActiveDocument_OnDrawFigure);
}
 
void ActiveDocument_OnDrawFigure(object sender, VectorDraw.Render.vdRender render, ref bool cancel)
{
    vdPolyface pface = sender as vdPolyface;
    if (pface != null)
    {
        if (pface.Label == "WIRE3D")// You can check here by Label/XProperty/Handle/Type/Layer etc
        {
            vdFramedControl1.BaseControl.ActiveDocument.FreezeEntityDrawEvents.Push(true);
            VectorDraw.Render.vdRender.Mode RMode = render.RenderMode;
            render.RenderMode = VectorDraw.Render.vdRender.Mode.Wire3d;
            pface.Draw(render);
            render.RenderMode = RMode;
            cancel = true;
            vdFramedControl1.BaseControl.ActiveDocument.FreezeEntityDrawEvents.Pop();
        }
    }
}