输入三点，以中间点为顶点，把旁边两条线做圆角，半径用户输入
输入三点，以中间点为顶点，把旁边两条线做圆角，半径用户输入static void TESTcomplexentcmd()
{
ads采用point pt1;
ads采用point pt2;
ads采用point pt3;
ads采用real r;
if (acedGetPoint(NULL,采用T("\n输入第一点"),pt1) != RTNORM)
{
return;
}
if (acedGetPoint(NULL,采用T("\n输入第二点"),pt2) != RTNORM)
{
return;
}
if (acedGetPoint(NULL,采用T("\n输入第三点"),pt3) != RTNORM)
{
return;
}
if (acedGetReal(采用T("\n输入内切圆半径"),&r) != RTNORM)
{
return;
}
////坐标维度转化
AcGePoint3d pt3d1 = asPnt3d(pt1);
AcGePoint3d pt3d2 = asPnt3d(pt2);
AcGePoint3d pt3d3 = asPnt3d(pt3);
////构造两条直线计算顶点到切点的距离
AcDbLine line1(pt3d2,pt3d1);
AcDbLine line2(pt3d2,pt3d3);
////得到以PT2为顶点的两个向量
AcGeVector3d v1(pt1-pt2,pt1-pt2,pt1 - pt2);
AcGeVector3d v2(pt3-pt2,pt3 - pt2,pt3 - pt2);
AcGeVector3d v3(0,0,1);
double PI = 3.1415926536;
////计算两个向量的夹角
double angle = v1.angleTo(v2,v3);
double angle1 = angle > PI ? 2 * PI - angle : angle;
////计算切点到顶点距离
double dist = r / tan(angle1 / 2);
////切点1
AcGePoint3d ptQ1;
////切点2
AcGePoint3d ptQ2;
////找到切点
line1.getPointAtDist(dist,ptQ1);
line2.getPointAtDist(dist,ptQ2);
////求出bulge值（是圆心角1/4的正切值 - - ,之前当成正切值的四分之一了 - -!!!)
double bulge;
bulge = tan((PI - angle1) / 4);
if(angle > 0 && angle <= PI)
{
bulge = - bulge;
}
AcDbPolyline* pl = new AcDbPolyline();
AcGePoint2d pt2d1(pt3d1,pt3d1);
AcGePoint2d pt2dq1(ptQ1,ptQ1);
AcGePoint2d pt2dq2(ptQ2,ptQ2);
AcGePoint2d pt2d3(pt3d3,pt3d3);
pl->addVertexAt(0,pt2d1,0);
pl->addVertexAt(1,pt2dq1,bulge);
pl->addVertexAt(2,pt2dq2,0);
pl->addVertexAt(3,pt2d3,0);
LoadEntity(pl);
CString out;
out.Format(采用T("\nangle:%.2f,bulge:%.2f,\ndist:%.2f\n,pt:%.2f,%.2f,%.2f"),angle,bulge,dist,pt1,pt2,pt3);
acutPrintf(out);
}
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