ObjectARX2010画多线段

最新推荐文章于 2024-10-14 16:58:35 发布

原创最新推荐文章于 2024-10-14 16:58:35 发布 · 1.2k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个用于创建轻量级多段线的函数，并详细展示了如何通过设置顶点、宽度和凸度来定义多段线的形状。此外，还提供了一种方法来旋转指定的实体，该方法使用了坐标变换矩阵来实现旋转操作。

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//添加函数，用于创建轻量多段线
AcDbObjectId CircleLine::CreatePolyline(AcGePoint2dArray points, double width)
{
int numVertices = points.length();
AcDbPolyline *pPoly = new AcDbPolyline(numVertices);

double bulge[5] = {0,-1,0,0,0.5}; //凸度：0.5是1/4圆弧，1是半圆
for (int i = 0; i < numVertices; i++)
{
pPoly->addVertexAt(i, points.at(i), bulge[i], width, width);
}
AcDbObjectId polyId;
polyId = CircleLine::PostToModelSpace(pPoly);

return polyId;

}

//按照指定的角度（用弧度值表示）旋转指定的实体，其实现代码为：
Acad::ErrorStatus CircleLine::Rotate(AcDbObjectId entId, AcGePoint2d ptBase, double rotation)
{
AcGeMatrix3d xform;
AcGeVector3d vec(0, 0, 1);
AcGePoint3d point;
point.x = ptBase.x;
point.y = ptBase.y;
point.z = 0;
xform.setToRotation(rotation, vec, point);
AcDbEntity *pEnt;
Acad::ErrorStatus es = acdbOpenObject(pEnt, entId, AcDb::kForWrite, false);
pEnt->transformBy(xform);
pEnt->close();
return es;
}