How to compute surface area of TopoDS_Face in OpenCASCADE
In order to compute the surface area of a TopoDS_Face
, in OpenCASCADE, simply use BRepGProp::SurfaceProperties
and call .Mass()
on the resulting GProp_GProps
object:
GProp_GProps gprops;
BRepGProp::SurfaceProperties(face, gprops); // Stores results in gprops
double area = gprops.Mass();
Alternatively, you can use my OCCUtils library which also also providers a lot of other utility functions:
#include <occutils/Surface.hxx>
using namespace OCCUtils;
double Surface::Area(const TopoDS_Shape& face);
Example:
#include <occutils/Surface.hxx>
using namespace OCCUtils;
// ...
double area = Surface::Area(myFace);
// ...