crossArea.py 文件源码

def triangleArea(triangleSet):

    """
    Calculate areas of subdivided triangles

    Input: the set of subdivided triangles

    Output: a list of the areas with corresponding idices with the the triangleSet
    """

    triangleAreaSet = []

    for i in range(len(triangleSet)):
        v1 = triangleSet[i][1] - triangleSet[i][0]
        v2 = triangleSet[i][2] - triangleSet[i][0]
        area = np.linalg.norm(np.cross(v1, v2))/2
        triangleAreaSet.append(area)

    return triangleAreaSet