renderer.py 文件源码

def barycentric(verts, p):
    ab = verts[2] - verts[0]
    ac = verts[1] - verts[0]
    pa = verts[0] - p
    u = utils.tri_cross(
        [ab[0], ac[0], pa[:, 0]],
        [ab[1], ac[1], pa[:, 1]])
    v = [u[0] / u[2], u[1] / u[2]]
    bc = [1. - v[0] - v[1], v[1], v[0]]
    valid = tf.logical_and(
        tf.abs(u[2]) >= 1.0,
        tf.reduce_all(tf.stack(bc, axis=1) >= 0, axis=1))
    return bc, valid