fem.scaled_jacobians

fem.scaled_jacobians(points, cells)

Per-element scaled Jacobian quality metric of each hex.

At each of the eight corners the Jacobian determinant (the corner-tet volume of :func:corner_tet_volumes) is normalized by the product of the lengths of the three edges meeting at that corner; the element value is the minimum over its corners. A perfect cube scores 1.0; values approach 0 as corners flatten and turn negative on inversion.

Parameters

Name	Type	Description	Default
points	np.ndarray	Vertex positions, (N, 3).	required
cells	np.ndarray	HEX8 connectivity, (C, 8).	required

Returns

Name	Type	Description
	np.ndarray	Scaled Jacobian per cell, shaped (C,), in [-1, 1].