meshlabxml/transform.py
def deform2curve(script, curve=mp_func.torus_knot('t'), step=0.001):
    """ Deform a mesh along a parametric curve function

    Provide a parametric curve function with z as the parameter. This will
    deform the xy cross section of the mesh along the curve as z increases.

    Source: http://blackpawn.com/texts/pqtorus/

    Methodology:
    T  = P' - P
    N1 = P' + P
    B  = T x N1
    N  = B x T

    newPoint = point.x*N + point.y*B

    """
    curve_step = []
    for idx, val in enumerate(curve):
        curve[idx] = val.replace('t', 'z')
        curve_step.append(val.replace('t', 'z+{}'.format(step)))

    tangent = mp_func.v_subtract(curve_step, curve)
    normal1 = mp_func.v_add(curve_step, curve)
    bee = mp_func.v_cross(tangent, normal1)
    normal = mp_func.v_cross(bee, tangent)
    bee = mp_func.v_normalize(bee)
    normal = mp_func.v_normalize(normal)

    new_point = mp_func.v_add(mp_func.v_multiply('x', normal), mp_func.v_multiply('y', bee))
    function = mp_func.v_add(curve, new_point)

    vert_function(script, x_func=function[0], y_func=function[1], z_func=function[2])
    return function
def deform2curve(script, curve=mp_func.torus_knot('t'), step=0.001):
    curve_step = []
    for idx, val in enumerate(curve):
        curve[idx] = val.replace('t', 'z')
        curve_step.append(val.replace('t', 'z+{}'.format(step)))

    tangent = mp_func.v_subtract(curve_step, curve)
    normal1 = mp_func.v_add(curve_step, curve)
    bee = mp_func.v_cross(tangent, normal1)
    normal = mp_func.v_cross(bee, tangent)
    bee = mp_func.v_normalize(bee)
    normal = mp_func.v_normalize(normal)

    new_point = mp_func.v_add(mp_func.v_multiply('x', normal), mp_func.v_multiply('y', bee))
    function = mp_func.v_add(curve, new_point)

    vert_function(script, x_func=function[0], y_func=function[1], z_func=function[2])
    return function
def deform2curve ( script , curve = mp_func . torus_knot ( 't' ) , step = 0.001 ) : curve_step = [ ] for idx , val in enumerate ( curve ) : curve [ idx ] = val . replace ( 't' , 'z' ) curve_step . append ( val . replace ( 't' , 'z+{}' . format ( step ) ) ) tangent = mp_func . v_subtract ( curve_step , curve ) normal1 = mp_func . v_add ( curve_step , curve ) bee = mp_func . v_cross ( tangent , normal1 ) normal = mp_func . v_cross ( bee , tangent ) bee = mp_func . v_normalize ( bee ) normal = mp_func . v_normalize ( normal ) new_point = mp_func . v_add ( mp_func . v_multiply ( 'x' , normal ) , mp_func . v_multiply ( 'y' , bee ) ) function = mp_func . v_add ( curve , new_point ) vert_function ( script , x_func = function [ 0 ] , y_func = function [ 1 ] , z_func = function [ 2 ] ) return function
Deform a mesh along a parametric curve function

    Provide a parametric curve function with z as the parameter. This will
    deform the xy cross section of the mesh along the curve as z increases.

    Source: http://blackpawn.com/texts/pqtorus/

    Methodology:
    T  = P' - P
    N1 = P' + P
    B  = T x N1
    N  = B x T

    newPoint = point.x*N + point.y*B
Deform a mesh along a parametric curve function