c# CAD二次开发入门学习二

获取到一个图形对象 ： AcadDocument oAcadDocument = oAcadApplication.Documents.Open(FileName, null, null);

有了图形对象，我们就可以给图形对象添加跟着线条图形

 

 double[] StartPoint = new double[3] { 10, 10, 0 };

double[] EndPoint = new double[3] { 50, 50, 0 };

1 画一条直线

AcadLine oAcadLine = oAcadDocument.ModelSpace.AddLine(StartPoint , EndPoint );

如果是虚线，则设置属性值  oAcadLine .LinetypeScale = 0.5;

可以给线条设置一下属性，如颜色：oAcadLine .color = ACAD_COLOR.acRed;

2 画一个圆 ：传入圆心坐标和半径长度：double radius=10；

oAcadDocument.ModelSpace.AddCircle(EndPoint , radius);

3 画弧线，有时候还需要话一条弧线 ，画弧度，使用π表示弧度

var ARC = oAcadDocument.ModelSpace.AddArc(EndPoint , radius, Math.PI / 2, Math.PI * 1.5);

4 添加文字说明  double fontsize=5;

 oAcadDocument.ModelSpace.AddText("玻璃", EndPoint , fontsize);

基本的线条描绘已经知道了，就可以组合画其他图形。

5 画一个方框

 public static void CoordinatePointAssignment(ref double[] CoordinatePoint,double x,double y,double z)
        {
            CoordinatePoint[0] = x;
            CoordinatePoint[1] = y;
            CoordinatePoint[2] = z;
        }
//画方框，得知道四个角的坐标
public static void DrawRectangleXX(ref AcadDocument oAcadDocument, double[] StartPoint,  double Width, double Height")
        {
            //--- Start_Point 起始坐标点
            double[] OnePoint = new double[PointArray]; double[] TwoPoint = new double[PointArray];
            double[] ThreePoint = new double[PointArray]; double[] FourPoint = new double[PointArray];
            double x, y;
            x = StartPoint[0]; y = StartPoint[1];
            //起始点是 左上角的 点
               CoordinatePointAssignment(ref OnePoint, x, y, 0);
                CoordinatePointAssignment(ref TwoPoint, x + Width, y, 0);
                CoordinatePointAssignment(ref ThreePoint, x + Width, y - Height, 0);
                CoordinatePointAssignment(ref FourPoint, x, y - Height, 0);
            
            //有了坐标--最后绘制连线，就变成了方框
            
                AcadLine oAcadLine;
                oAcadLine = oAcadDocument.ModelSpace.AddLine(OnePoint, TwoPoint);
                oAcadLine = oAcadDocument.ModelSpace.AddLine(TwoPoint, ThreePoint);
                oAcadLine = oAcadDocument.ModelSpace.AddLine(ThreePoint, FourPoint);
                oAcadLine = oAcadDocument.ModelSpace.AddLine(FourPoint, OnePoint);
            
        }

6 加一个标注说明：如下图，标注一下线条的宽度754。

/// 

        /// 文本坐标点
        /// 
        /// 输出结果
        /// 起始点
        /// 终点
        /// 值类别
        /// 偏移值
        public static void TextCoordinatePoint(ref double[] TaggedCoordinates,double[] StartPoint, double[] EndPoin,int TypeValue, double Deviate)
        {
            if (TypeValue == 1)
            {
                //---横向向的标注
                TaggedCoordinates[0] = (StartPoint[0] + EndPoin[0]) / 2;
                TaggedCoordinates[1] = StartPoint[1] + Deviate;
                TaggedCoordinates[2] = StartPoint[2];
            }
            else
            {
                //---纵向的标注
                TaggedCoordinates[0] = StartPoint[0] + Deviate;
                TaggedCoordinates[1] = (StartPoint[1] + EndPoin[1]) / 2;
                TaggedCoordinates[2] = StartPoint[2];
            }
        }

/// 

        /// 添加标注
        /// 
        /// 文档对象
        /// 开始位置
        /// 结束位置
        /// 1位横向标注
        /// 正负值位为开口方向
        /// 标注内容
        public static void Addtext(ref AcadDocument oAcadDocument, double[] StartPoint, double[] EndPoint, int TypeValue, double Deviate,string text,int textH=0)
        {
            AcadDimAligned oAcadDimAligned; double[] uTemporaryPoint = new double[3];
            TextCoordinatePoint(ref uTemporaryPoint, StartPoint, EndPoint, TypeValue, Deviate);
            oAcadDimAligned = oAcadDocument.ModelSpace.AddDimAligned(StartPoint, EndPoint, uTemporaryPoint);
            oAcadDimAligned.TextOverride = text;if(textH>0) oAcadDimAligned.TextHeight = textH;
        }

最后使用： Addtext(ref oAcadDocument, StartP, EndP, 1, -10,  "754");

线条的开始坐标 StartP ，结束坐标 EndP，1 方法里表示横向标注，-10表示坐标向下距离10个像素，画双箭头标注754

CAD绘图，无非就是在图形对象里画线画框画圆，只要知道坐标开始，坐标画到哪里了，再在此位置加入我们要画的对应图形就行了，下面是我完成的一张比较简单的出图：