新手入门必看：VectorDraw 常见问题整理大全（一）

本教程整理了VectorDraw 最常见问题，教程整理的很齐全，非常适合新手学习，希望对大家有一定的帮助！

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。该库还支持许多矢量和栅格输入和输出格式，包括本地PDF和SVG导出。

【VectorDraw Developer Framework最新版下载】

VectorDraw web library (javascript)是一个矢量图形库。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。

【VectorDraw web library (javascript)最新版下载】

一. 导出背景色的SVG文件

问：是否可以导出背景颜色不同于白色的SVG文件/p>

答：可以通过一些代码行来指示VDF（VectorDraw Developer Framework）组件在OnDrawBackground事件中使用Palette的背景颜色，例如：

// the form conatins a vdFramedControl and a Buttonbool isOnSVGSave = false; // use this global boolean in the form and make it true just before saving the SVG and then again to false after save is finishedprivate void button1_Click(object sender, EventArgs e){    vdDocument doc = vdFramedControl.BaseControl.ActiveDocument;    doc.Open(@"C:testsimple1.vdml"); // open a test file    doc.Palette.Background = Color.LightYellow; // change the background color    doc.Palette.Forground = Color.DarkSlateGray; // and the foreground color..........    isOnSVGSave = true; //set this flag to true before saving SVG    doc.OnDrawBackground += new vdDocument.DrawBackgroundEventHandler(doc_OnDrawBackground); // enable the event    doc.SaveAs(@"c:testsvg1.svg"); // save the SVG    doc.OnDrawBackground -= new vdDocument.DrawBackgroundEventHandler(doc_OnDrawBackground); // disable the event    isOnSVGSave = false;//set this flag back to false after saving SVG}void doc_OnDrawBackground(object sender, vdRender render, ref bool cancel){    if (isOnSVGSave && render!=null && render is RenderFormats.SvgRender) // check that is on "save" and render is SvgRender    {        cancel = true; // you need to pass this as tru        render.Clear(vdFramedControl.BaseControl.ActiveDocument.Palette.Background); // clear the render and use the Palette’s Background color!    }}   

二. 在非XY平面中创建polyhatch

问：如何在非X / Y平面中创建polyhatch/p>

答：在创建剖面线时，多边形曲线和剖面线应位于X / Y平面中，因此如果在相同但不是X / Y平面中有折线，则需要将它们“带”到X / Y平面，创建聚阴影线，然后让他们回到他们的平面。请看以下代码：

 private void Test()        {            vdDocument doc = vdFramedControl.BaseControl.ActiveDocument;            doc.New();            #region create 2 random polylines            // we will use two circles in order to get some random points from them to create the polylines.            vdCircle cir1 = new vdCircle(doc, new gPoint(3, 2), 5);            vdCircle cir2 = new vdCircle(doc, new gPoint(3, 2), 2);            Vector vec = new Vector(0.3, 0.7, -0.2); vec.Normalize();            cir1.ExtrusionVector = vec;            cir2.ExtrusionVector = vec;            // 2 circles are created in the same "random" plane            // get some points from these just to "have" two polylines            gPoints pts1 = cir1.geomMeasure(7); // points of 1st polyline            gPoints pts2 = cir2.geomMeasure(4); // points of 2nd polyline            #endregion            Matrix mat = new Matrix(); // this is the matrix of the plane that the circles belong to            mat.SetToViewDirection(vec, 0.0d);            Matrix invmat = new Matrix(mat.GetInvertion());            // create the curves for the polyhatch            vdPolyline pl = new vdPolyline(doc, pts1);            // vector should be perpendicular in the plane where the polyline is and can also calculated using CalculateNormal3P, like:            Vector vec2 = new Vector();            Vector.CalculateNormal3P(pl.VertexList[0] as gPoint, pl.VertexList[1] as gPoint, pl.VertexList[2] as gPoint, out vec2);            // in this case we already have it from the circle, as we set it above.            pl.ExtrusionVector = vec;            pl.Flag = VdConstPlineFlag.PlFlagCLOSE;            pl.Transformby(mat); // we need to bring these points to X/Y plane            pl.Update();            VectorDraw.Professional.vdCollections.vdCurves curves_Outer = new VectorDraw.Professional.vdCollections.vdCurves();            curves_Outer.AddItem(pl);            pl = new vdPolyline(doc, pts2);            pl.ExtrusionVector = vec;            pl.Flag = VdConstPlineFlag.PlFlagCLOSE;            pl.Transformby(mat); pl.Update(); // we need to bring these points to X/Y plane                VectorDraw.Professional.vdCollections.vdCurves curves_Inside = new VectorDraw.Professional.vdCollections.vdCurves();            curves_Inside.AddItem(pl);            //'create polyhatch            vdPolyhatch onehatch = new vdPolyhatch(doc);            onehatch.PolyCurves.AddItem(curves_Outer);            onehatch.PolyCurves.AddItem(curves_Inside);            onehatch.HatchProperties = new VectorDraw.Professional.vdObjects.vdHatchProperties(VectorDraw.Professional.Constants.VdConstFill.VdFillModeSolid);            onehatch.Transformby(invmat); // bring this to the plane where the circles are.            doc.Model.Entities.AddItem(onehatch);            //just add the circles for display reasons. There is no need to add them            cir1.PenColor.FromSystemColor(Color.Red);            cir2.PenColor.FromSystemColor(Color.Red);            doc.Model.Entities.AddItem(cir1);            doc.Model.Entities.AddItem(cir2);            doc.CommandAction.Zoom("E", 0, 0);        }   

三. 导出txt文件中的xyz坐标

问：如何将图形中的折线和折线的x，y，z数据导出到txt文件中/p>

答：VDF没有自动化此功能，但很容易从加载到VDF组件的任意图形中导出此txt文件。请参阅以下代码：

private void button1_Click(object sender, EventArgs e){    vdDocument doc = vdFramedControl.BaseControl.ActiveDocument;    doc.New();    doc.Open(@"c:testMyModel Layout_1.0.dxf");     using (StreamWriter writer = new StreamWriter(doc.FileName+".txt")) //export c:testMyModel Layout_1.0.dxf.txt file containing the points of lines and polylines only    {        foreach (vdFigure item in doc.Model.Entities)        {            if (item != null && item is vdLine)            {                writer.WriteLine("vdLine " + (item as vdLine).StartPoint.ToString() + " " + (item as vdLine).EndPoint.ToString());            }            if (item != null && item is vdPolyline)            {                writer.Write("vdPolyline ");                foreach (Vertex item2 in (item as vdPolyline).VertexList)                {                    writer.Write(item2.AsgPoint().ToString() + " ");                }                writer.WriteLine(" ");            }        }    }}

您所需要的只是循环遍历文档中的所有对象（线，折线等）并获取其x，y，z值并使用StreamWriter将它们写入txt文件。

四. 如何覆盖折线的夹点

问：我想以不同的方式绘制折线的第一个夹点。我如何才能做到这一点/p>

答：以下是使用FigureDrawGrips事件执行此操作的示例：

..... // need to have thesedoc.FreezeEntityDrawEvents.Push(false);doc.OnFigureDrawGrips += new vdDocument.FigureDrawGripsEventHandler(doc_OnFigureDrawGrips);....and        //overrides the default draw grip        //draw the first grip of all vdFigures as red circle        //and the others as rectangle using the default grip color        void doc_OnFigureDrawGrips(object sender, vdRender render, ref bool cancel)        {            vdFigure fig = sender as vdFigure;            if (fig == null) return;            //calculate the circle points and grip box points relative to grip center.            double half_viewsize = render.PixelSize * render.GlobalProperties.GripSize * 0.5d;            gPoint offsetPoint = new gPoint(half_viewsize, half_viewsize);            Box GripBox = new Box(offsetPoint * -1, offsetPoint);            gPoints circlepts = Globals.GetArcSamplePoints(16, half_viewsize, 0, Globals.VD_TWOPI);            Matrix morigin = new Matrix();             gPoints pts = fig.GetGripPoints();//points are in world CS            int i = 0;            foreach (gPoint pt in pts)            {                if (!render.IsSectionVisible(pt)) continue;//check the 3d section clip visibility                gPoint ptInView = render.CurrentMatrix.Transform(pt);                System.Drawing.Point p = render.View2PixelMatrix.Transform2GDIPoint(ptInView);                if (!render.Contains(p)) continue;//check if grip is inside the screen                //initialize a new offset matrix represents the center of grip in current view CS                morigin.IdentityMatrix();                morigin.TranslateMatrix(ptInView);                 //push to matrix where the grip figure points are reference(see GripBox and circlepts)                render.PushToViewMatrix();                render.PushMatrix(morigin);                if (i == 0)//if it is the first grip                {                    render.PushPenstyle(Color.Red, true);                    render.DrawPLine(sender, circlepts);                    render.PopPenstyle();                }                else render.DrawBoundBox(sender, GripBox);                render.PopMatrix();                render.PopMatrix();                 //if a rendering procedure was break usually by a user pan / zoom in-out                if (render.StatusDraw == vdRender.DrawStatus.Break) break;                i++;            }            render.IsMessageQueEmpty();//update the render StatusDraw by checking if a mouse action was placed by the user            cancel = true;//do not call the default VectorDraw grip draw.        }

五. VDF滚动的鼠标滚轮控制

问：我想禁用鼠标平移和鼠标滚轮缩放，而不是使用滚轮，我想控制绘图的滚动，水平和垂直。我如何才能做到这一点/p>

答：您可以按照以下操作来禁用鼠标中键平移和鼠标滚轮放大/缩小。

//For the wrapper we have to get the vdDocument object like below.VectorDraw.Professional.vdObjects.vdDocument doc = vd.ActiveDocument.WrapperObject as VectorDraw.Professional.vdObjects.vdDocument;doc.MouseWheelZoomScale = 1.0;              //1.0 means disabled mouse wheel. 0.8(less than 1.0) or 1.2(more than 1.0) values can reverse the mouse wheel functionality.

要禁用平移，您必须使用如下的JobStart事件。

vd.JobStart += new AxVDrawLib5._DVdrawEvents_JobStartEventHandler(vd_JobStart);void vd_JobStart(object sender, AxVDrawLib5._DVdrawEvents_JobStartEvent e){if (e.jobName == "BaseAction_ActionPan") e.cancel = 1;}

要滚动视图，请使用以下代码：

 ... // these events must be used            doc.MouseWheelZoomScale = 1.0d; // disable mouse wheel zoom                doc.ActionStart += new vdDocument.ActionStartEventHandler(doc_ActionStart);            vdFramedControl1.BaseControl.MouseWheel += new MouseEventHandler(BaseControl_MouseWheel);        ...        void BaseControl_MouseWheel(object sender, MouseEventArgs e)        {            if ((e != null) && (e.Delta != 0))            {                vdDocument doc = vdFramedControl1.BaseControl.ActiveDocument;                double height = doc.ActiveRender.Height * doc.ActiveRender.PixelSize;                double width = doc.ActiveRender.Width * doc.ActiveRender.PixelSize;                double stepY = height * (e.Delta / Math.Abs(e.Delta)) / 10.0d;                double stepX = width * (-1.0d * e.Delta / Math.Abs(e.Delta)) / 10.0d;                if ((Control.ModifierKeys & Keys.Shift) == Keys.Shift)                { // if Shift key is pressed scroll horizontally                    doc.ScrollActiveActionRenderView(stepX, 0.0d, true); // scroll only in dX                }                else //else scroll vertically                {                    doc.ScrollActiveActionRenderView(0.0d, stepY, true); // scroll only in dY                }            }        }        void doc_ActionStart(object sender, string actionName, ref bool cancel)        {            if (actionName == "BaseAction_ActionPan") cancel = true; // cancel middle mouse button pan        }

标签：CAD工业4.0

来源：慧都