Input video: sydney

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):
    // Change the background.
    setBgImg(P, args.background)

    // OBJECT SELECTOR: Select all objects in the top third of the video.
    function in_top_third(y):
        if y > P.height / 3:
            return False
        return True
    topObjs = objSelector(P, propQuery, "positionY", in_top_third, [0, P.endFrm])
    
    // Sort all objects by x position at the very end. We will change the leftmost
    // object to the new translated location and the rightmost object to the new
    // translation for "explore."
    function xComparator(obj):
        return propQuery(obj, "positionX", [P.endFrm - 1, P.endFrm])[0]
    topObjs = sorted(topObjs, key=xComparator)
    changeObjs = [topObjs[0], topObjs[-1]]

    // OBJECT TRANSFORMER: Change to new language and shift them so that they end 
    // up in the bounds of the screen.
    changeAppearanceObjTransformer(changeObjs, args.topText, [0, P.endFrm])
    function xShift(t, [x, amt]):
        return x[t] + amt
    adjLocalObjMotion(changeObjs[0], setX, [changeObjs[0].startFrm, changeObjs[0].endFrm], amt=args.bottomTextShift)
    adjLocalObjMotion(changeObjs[-1], setX, [changeObjs[-1].startFrm, changeObjs[-1].endFrm], amt=-args.bottomTextShift)
    
    // Remove all the other objects.
    removeObjs(topObjs[1:-1])

    // OBJECT SELECTOR: Select all objects in the bottom third of the video.
    function in_bottom_third(y):
        if y < 2 * P.height / 3:
            return False
        return True
    bottomObjs = objSelector(P, propQuery, "positionY", in_bottom_third, [0, P.endFrm])

    // Sort all objects by x position at the very end. We will change one object to 
    // the first translated phrase and another object to the second translated phase.
    bottomObjs = sorted(bottomObjs, key=xComparator)

    // OBJECT TRANSFORMER: Change to new language and shift them inwards.
    changeAppearance(bottomObjs[len(bottomObjs) // 2], args.bottomText)

    // Remove all the other objects.
    removeObjs(bottomObjs[:len(bottomObjs) // 2])
    removeObjs(bottomObjs[len(bottomObjs) // 2 + 1:])

    // OBJECT SELECTOR: Select the plane by querying for objects which pass through the middle third
    // of the video.
    function in_bottom_third(vals):
        if y > 2 * P.height / 3 or y < P.height / 3:
            return False
        return True
    planeObjs = objSelector(P, propQuery, "positionY", in_middle_third, [0, P.endFrm])
  
    // OBJECT TRANSFORMER: Change the plane to a cruise ship and make it travel slowly in a straight line.
    changeAppearanceObjTransformer(planeObjs, args.boat)
    function constantY(t, [y, amt]):
        return y[0]
    adjGlobalObjTransformer(planeObjs, constantY, [changeObjs[0].startFrm, changeObjs[0].endFrm])      
    function scaleXPosition(t, [x]):
        return x[t // 2]    
    adjGlobalObjTransformer(planeObjs, scaleXPosition, m_duration, [planeObjs[0].startFrm, planeObjs[0].endFrm])
    function quadEaseInOut(t):
        easedT = 0
        if t < 0.5:
            return t^2
        else:
            1 - t^2
    slowInOutObjTransformer(planeObjs, quadEaseInOut, [planeObjs[0].startFrm, planeObjs[1].startFrm])

Output SVG motion program

Input SVG motion program

MPTransformer(P, args):
    // Change the background.
    changeAppearance(P, args.background)

    // OBJECT SELECTOR: Select all objects in the top third of the video.
    // Sort them by y-position at the very end. We will only change two objects.
    function in_top_third(vals):
        if y > m_frame_height / 3:
            return False
        return True
    topObjs = objSelector(P, propQuery, "positionY", in_top_third, [0, P.endFrm])
    function yComparator(obj):
        return propQuery(obj, "positionY", [P.endFrm - 1, P.endFrm])[0]
    bottomObjs = sorted(bottomObjs, key=yComparator)
    changeObjs = [topObjs[0], topObjs[-1]]

    // OBJECT TRANSFORMER: Change to new language and shift them so that they end 
    // up in the bounds of the screen.
    changeAppearanceObjTransformer(changeObjs, arg.topText, [0, P.endFrm])
    function xShift(t, [x, amt]):
        return x[t] + amt
    adjGlobalMotion(changeObjs[0], xShift, [changeObjs[0].startFrm, changeObjs[0].endFrm], args.shiftDiscover)
    adjGlobalMotion(changeObjs[1], xShift, [changeObjs[1].startFrm, changeObjs[1].endFrm], args.shiftSydney)
    
    // Remove all the other objects.
    removeObjs(topObjs[1:-1])

    // OBJECT SELECTOR: Select all objects in the bottom third of the video.
    function in_bottom_third(y):
        if y < 2 * P.height / 3:
            return False
        return True
    bottomObjs = objSelector(P, "positionY", in_bottom_third, [0, P.endFrm])

    // Sort all objects by x position at the very end. We will change on object to 
    // The first translated phrase and another object to the second translated phase.
    function xComparator(obj):
        return propQuery(obj, "positionX", [P.endFrm - 1, P.endFrm])[0]
    bottomObjs = sorted(bottomObjs, key=xComparator)
    copyObjs = copy(bottomObjs[0])
    changeObjs = [bottomObjs[0], copyObjs[0]]

    // OBJECT TRANSFORMER: Change to new language and shift them inwards.
    changeAppearanceObjTransformer(changeObjs, args.bottomText, [0, P.endFrm])
    function setX(t, [x, amt]):
        return amt
    adjLocalMotion(changeObjs[0], setX, [changeObjs[0].startFrm, changeObjs[0].endFrm], args.bottomTextShift)
    adjLocalMotion(changeObjs[1], setX, [changeObjs[1].startFrm, changeObjs[1].endFrm], -args.bottomTextShift)

    // Delay the second phrase by a little bit.
    linearRetimeObjTransformer(changeObjs[1], 5, [0, 1])

    // Remove all the other objects.
    removeObjs(bottomObjs[1:])

Output SVG motion program