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OCC boundding box 以及 distance

发表于 更新于
作者 Roderick.Huang 1 分钟阅读

bounding box 方式检测

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#include <Bnd_Box.hxx>
#include <BRepBndLib.hxx>

TopoDS_Shape shape1, shape2; // Assume these shapes are already defined
Bnd_Box boundingBox1, boundingBox2;

BRepBndLib::Add(shape1, boundingBox1);
BRepBndLib::Add(shape2, boundingBox2);

bool isInterfering = !boundingBox1.IsOut(boundingBox2);

distance 方式检测

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#include <BRepExtrema_DistShapeShape.hxx>

BRepExtrema_DistShapeShape distShapeShape(shape1, shape2);
Standard_Real minDistance = distShapeShape.Value();
bool isInterfering = (minDistance <= Precision::Confusion());
  • BRepExtrema_DistShapeShape 比 bounding box 方式费时；
  • 如果bouding box方式检测出来出现干涉（interference, overlap），则可以使用distance检测方式确认；
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