slips.py

slip nuke anims

import nuke, re

def slip_animations_of_node(node, by_offset):
    """
    This function will slip all the animations of the passed node by a passed
    offset in frames
    
    The animations are offset in the passed TCL curve command.
    In this script every frame at which keys are placed is marked by x<FRAME_NUMBER>,
    and these are only placed at the start of a non-continuous segment.
    Instead of mucking about with AnimationKey objects (which we also
    can inadvertently slip behind their following keys), we take the whole curve
    and replace all these commands by their respective slipped values
    """
    def offset_frames_in_curve(curve_str, offset):
        def offset_replace(m):
            # Try to preserve float/int distinction
            if "." in m.group(1):
                return "x%0.3f" % (float(m.group(1)) + offset)
            else:
                return "x%d" % (int(m.group(1)) + offset)
        return re.sub(r"x([-+]?\d*\.\d+|\d+)", offset_replace, curve_str)
    
    # Walk all the knobs of the object and check if they are animated.
    for knob_name in node.knobs():
        k = node[knob_name]
        if k.isAnimated():
            k.fromScript(offset_frames_in_curve(k.toScript(), int(by_offset)))