Exemple #1
0
def create_squash_atts(attr_stretch, samples):
    """
    Create attributes resolving a curve using the following formula.
    s^(e^(x^2)))
    see: http://www.wolframalpha.com/input/?i=%28x%5E2-1%29*-1
    :param attr_stretch: # The stretch attribute.
    :param samples: Number of samples to resolve.
    """
    import libFormula
    if not isinstance(attr_stretch, pymel.Attribute):
        raise IOError("Expected pymel Attribute, got {0} ({1})".format(attr_stretch, type(attr_stretch)))

    attr_stretch_inv = create_utility_node('multiplyDivide', operation=2, input1X=1.0, input2X=attr_stretch).outputX

    return_vals = []
    for i in range(samples):
        pos = float(i) / (samples - 1) * 2.0 - 1.0

        # Blend between no squash and full squash using a bell curve.
        # 0 = Maximum Squash
        # 1 = No Squash
        # see see: http://www.wolframalpha.com/input/?i=%28x%5E2-1%29*-1
        blend = libFormula.parse("x^2", x=pos)

        attr_squash = libFormula.parse("((max-min)*blend)+min",
            min=attr_stretch_inv,
            max=1,
            blend=blend
        )

        return_vals.append(attr_squash)
    return return_vals
Exemple #2
0
def create_squash_atts(attStretch, numSegments):
    import libFormula
    if not isinstance(attStretch, pymel.Attribute):
        raise IOError("Expected pymel Attribute, got {0} ({1})".format(attStretch, type(attStretch)))
    return_vals = []
    for i in range(numSegments):
        pos = float(i)/(numSegments-1) * 2.0 - 1.0
        attSquash = libFormula.parse("s^(e^(x^2)))", s=attStretch, x=pos)
        return_vals.append(attSquash)
    return return_vals