mesh.py 文件源码

def _area_of_tri(self, tri):
        """Return the area of the given triangle.

        Parameters
        ----------
        tri : :obj:`numpy.ndarray` of int
            The triangle for which we wish to compute an area.

        Returns
        -------
        float
            The area of the triangle.
        """
        verts = [self.vertices[i] for i in tri]
        ab = verts[1] - verts[0]
        ac = verts[2] - verts[0]
        return 0.5 * np.linalg.norm(np.cross(ab, ac))