Input video: lucy

Output SVG motion program code

Output SVG motion program

SVG motion program code (uncorrected tracking)

SVG motion program (uncorrected tracking)

Input SVG motion program

MPTransformer(P, args):
    new_appearances = [
        'data/misc30/chinese/nice.png',
        'data/misc30/chinese/to.png',
        'data/misc30/chinese/meet.png',
        'data/misc30/chinese/you.png',
        'data/misc30/chinese/Im.png',
        'data/misc30/chinese/lucy.png',
    ]
    wordObjs = objSelector(P, propQuery, "color", "black", [0, P.endFrm])
    changeAppearanceObjTransformer(wordObjs, new_appearances)

Output SVG motion program

Input SVG motion program

MPTransformer(P, args):
    // Change to french text.
    new_appearances = [
        'data/misc30/french/enchante.png',
        'data/misc30/french/jesuis.png',
        'data/misc30/french/lucy.png',
    ]
    wordObjs = objSelector(P, propQuery, "color", "black", [0, P.endFrm])
    changeAppearanceObjTransformer(wordObjs[-3:], new_appearances)
    removeObjs(wordObjs[:-3])

    // Positional adjustments.
    function setX(t, [x, amt]):
        return amt / 2
    adjGlobalMotion(wordObjs[-3], setX, [obj.startFrm, obj.endFrm], amt=P.width / 2)

    // Get the two objects in contact with it.
    collisions = eventQuery(wordObjs[-3], "collisionFrames", [100, 200])
    function containsID(id, id_list):
        return id in id_list
    id_list = {}
    for collision in collisions:
        id_list.add([obj.id for obj in collision])
    contactObjs = objSelector(P, propQuery, "id", containsID, [0, P.endFrm], id_list=id_list)
    function adjust_by(t, [y, amt]):
        return amt
    adjustLocalObjTransformer(
        [wordObjs[-3], contactObjs[0], contactObjs[1]], 
        adjust_by, [wordObjs[-3].startFrm, P.endFrm], amt=-75)
    // Readjust the two contact objects motions so that they float from 
    // their new starting position to their original ending position.
    function global_interp(t, [y, start, end, length]):
        if t < length:
            return end * t / length + start * (1 - t / length)
        else:
            return end
    for obj in contactObjs:
        y_pos_start = propQuery(obj, "positionY", [0, wordObjs[-3].endFrm])[-1]
        y_pos_end = minimum(propQuery(obj, "positionY", [obj.startFrm, obj.endFrm]))
        adjGlobalMotion(obj, global_interp, [wordObj[-3].endFrm, obj.endFrm], 
                        start=y_pos_start, end=y_pos_end, length=P.frame_rate)

Output SVG motion program