CityMaker 8 二次开发之SplitModelPointByPolygon2D时的Polygon注意事项

bool successed = converter.SplitModelPointByPolygon2D(multiPolygon, inputModel, inputModelPoint, out outputModelInner, out outputModelPointInner, out outputModelOut, out outputModelPointOut);
 if (successed == false)
{
    MessageBox.Show("执行失败！");
    return;
}

注意：

输入的多边形必须是带Z，必须必须归平才行。

IMultiPolygon 也必须是带Z的。

            IPolygon cutPolygon = polygon.Clone2(gviVertexAttribute.gviVertexAttributeZMID) as IPolygon;
            for (int k = 0; k < cutPolygon.ExteriorRing.PointCount; k++)
            {
                IPoint currentPt = cutPolygon.ExteriorRing.GetPoint(k);
                currentPt.Z = cutPolygon.ExteriorRing.GetPoint(0).Z;
                cutPolygon.ExteriorRing.UpdatePoint(k, currentPt);
            }

            for (int k = 0; k < cutPolygon.InteriorRingCount; k++)
            {
                IRing ring = cutPolygon.GetInteriorRing(k);
                for (int l = 0; l < ring.PointCount; l++)
                {
                    IPoint tempPt = ring.GetPoint(l);
                    tempPt.Z = cutPolygon.ExteriorRing.GetPoint(0).Z;
                    ring.UpdatePoint(l, tempPt);
                }
            }
            cutPolygon.Close();

            IMultiPolygon multiPolygon = (new GeometryFactory()).CreateGeometry(gviGeometryType.gviGeometryMultiPolygon, gviVertexAttribute.gviVertexAttributeZMID) as IMultiPolygon;
            multiPolygon.AddGeometry(cutPolygon);

补充：

这里的MinZ和MaxZ是在绝对坐标值，并不是在某个面上下各多少。哈哈哈。。。。

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