VDF常见问题整理（七十）：单击是否可以创建旋转的连续尺寸？

本系列教程整理了VectorDraw Developer Framework（VDF）最常见问题，教程整理的很齐全，非常适合新手学习。本文将会介绍单击如何创建旋转尺寸。

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

问：单击是否可以创建旋转的连续尺寸/span>

您可以尝试如下代码：

gPoint prevPT = null; // the point that th euser clicked previouslygPoint DimPos = null; // position of the dimensionsbool IsOnDimCont = false;private void button1_Click(object sender, EventArgs e){    //where doc is a vdDocument, like vdFramedControl1.BaseControl.ActiveDocument    IsOnDimCont = false;    if (doc.CommandAction.CmdDim(VectorDraw.Professional.Constants.VdConstDimType.dim_Rotated, null, null, 0.0d))    {        vdDimension dim = doc.ActiveLayOut.Entities.Last as vdDimension;        prevPT = doc.World2UserMatrix.Transform(new gPoint(dim.DefPoint2)); // get the last point the user clicked and keep it for the next dimension        gPoint DimPos = doc.World2UserMatrix.Transform(new gPoint(dim.LinePosition)); // or you can calculate this by using the midpoint of DefPoint1 & DefPoint2 plus a DX/DY        doc.OnPrompt += new vdDocument.PromptEventHandler(doc_OnPrompt);// enable the event        for (int i = 0; i < 5; i++) // here you can change it to a do..while loop        {            IsOnDimCont = true;            if (doc.CommandAction.CmdDim(VectorDraw.Professional.Constants.VdConstDimType.dim_Rotated, null, DimPos, 0.0d))            {                vdDimension dimNext = doc.ActiveLayOut.Entities.Last as vdDimension;                prevPT = doc.World2UserMatrix.Transform(new gPoint(dimNext.DefPoint2)); // get the last point the user clicked and keep it for the next dimension            }            IsOnDimCont = false;        }        doc.OnPrompt -= new vdDocument.PromptEventHandler(doc_OnContDimPrompt); // disable it    }} void doc_OnContDimPrompt(object sender, ref string promptstr){    if (IsOnDimCont && sender!=null && promptstr == "First Point:" ) // this means that it is inside your cont. dimension code    {        doc.PostCommandActionString(vdFramedControl1.BaseControl, prevPT.ToString()); // here we pass the first point of the new dimension using the prevPT stored earlier    }}

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来源：慧都