Progressive Color Change Question

[user_deleted]

Hi guys, I'm quite new in shake and I'd like to create an effect in which an obj changes his color, for example from red to green, in a progressive way, for example it starts to change color from left and goes to right or from the top to the bottom, over time....which workflow have I to follow?

bye and thanks

[user_deleted]

i'm sure there are more elegant ways to do this but i'd start with making the desired color change on the whole image with some keyframes and then generate an aminated mask that limits the effect.. something like (copy-paste into the node window):

CODE
Checker1_original_footage = Checker(720, 576, 1, 32, xSize/GetDefaultAspect());
RotoShape1 = RotoShape(720, 576, 1, "v4.10", 0, 0, 0, 1, 1, xScale,
    width/2, height/2, 0, 0.5, 0, 384, "100W@eB000VDhsuH9RYbMXHCo8Xg6QeUaLcodDG20fus0JubW2TmC0qSBYKe65C0p03Gq3D5HlJHJlX8ayBAleyxBVvSSCtE8@x9@LHpffKHDoBmJ54GFa6GJ1n2BoJ73G3CHxI7XIcRQfND1uMrXlDLZJ6gWQGTtvYWEjuoJB84#rcDRiB9DpkR5X8pCq1h4VzIO4pzo8K3zoKg1V15CfMGYP6582Wm0qCXCCqWz5GqWZC00o91Q3KvYq1G@Y3e6Oe4OO14L6XCC0#o497x9WPs79T58fuCNa7ME64BLf9@8vI2mX1COv00810e9Zn71");
Mult1_color_change = Mult(Checker1_original_footage, Hermite(0,[1,-7.04,-7.04]@1,[0,-7.04,-7.04]@10),
    Hermite(0,[1,0,0]@1,[1,0,0]@10), Hermite(0,[1,-7.04,-7.04]@1,[0,-7.04,-7.04]@10),
    1, 1);
Pan1_mask_animation = Pan(RotoShape1, Hermite(0,[0,-99.25,-99.25]@1,[-766,-99.25,-99.25]@10),
    Hermite(0,[0,0,0]@1,[0,0,0]@10), 0, 0.5, 0);
Blur1_always_blur = Blur(Pan1_mask_animation, 400, 0, 0, "gauss",
    xFilter, "rgba");
Mask(Mult1_color_change, Blur1_always_blur, "A", 100, 0, 1, 1);

[edit: fixed some sloppy typos]

[user_deleted]

QUOTE(zem @ 01/08/07, 09:06 AM) [snapback]256654[/snapback]
CODE
RotoShape1 = RotoShape(720, 576, 1, "v4.10", 0, 0, 0, 1, 1, xScale,
    width/2, height/2, 0, 0.5, 0, 384, "100W@eB000VDhsuH9RYbMXHCo8Xg6QeUaLcodDG20fus0JubW2TmC0qSBYKe65C0p03Gq3D5HlJHJlX8ayBAleyxBVvSSCtE8@x9@LHpffKHDoBmJ54GFa6GJ1n2BoJ73G3CHxI7XIcRQfND1uMrXlDLZJ6gWQGTtvYWEjuoJB84#rcDRiB9DpkR5X8pCq1h4VzIO4pzo8K3zoKg1V15CfMGYP6582Wm0qCXCCqWz5GqWZC00o91Q3KvYq1G@Y3e6Oe4OO14L6XCC0#o497x9WPs79T58fuCNa7ME64BLf9@8vI2mX1COv00810e9Zn71");

First, thanks a lot for your post... I've some problem to open your script; it seem to have some problem when you define the rotoshape: are you sure the code it's correct (sorry, but I am not confident with shake scripts, so I can't debug it...)

bye and thanks again

[user_deleted]

hmm, doesnt seem to work here either. not sure why, maybe some character encoding issue.
try this instead:

CODE
Checker1_original_footage = Checker(720, 576, 1, 32, xSize/GetDefaultAspect());
Color1 = Color(1500, 1000, 1, 0, red, red, 1, 0);
Mult1_color_change = Mult(Checker1_original_footage, Hermite(0,[1,-7.04,-7.04]@1,[0,-7.04,-7.04]@10),
    Hermite(0,[1,0,0]@1,[1,0,0]@10), Hermite(0,[1,-7.04,-7.04]@1,[0,-7.04,-7.04]@10),
    1, 1);
Pan1_mask_animation = Pan(Color1, Hermite(0,[732,-99.25,-99.25]@1,[-376,-99.25,-99.25]@10),
    Hermite(0,[-201,0,0]@1,[-198,0,0]@10), 0, 0.5, 0);
Blur1_always_blur = Blur(Pan1_mask_animation, 400, 0, 0, "gauss",
    xFilter, "rgba");
Mask(Mult1_color_change, Blur1_always_blur, "A", 100, 0, 1, 1);

hope that works
++ c.

[user_deleted]

Thanks again, but this time I have problems with the last line:

Mask(Mult1_color_change, Blur1_always_blur, "A", 100, 0, 1, 1);

maybe we have different shake versions: I have shake 2.51 for windows

Bye and sorry I waste your time with this problem

[user_deleted]

yeah, i'm on shake 4.1, but it's such a simple tree that i dont know why it shouldnt work. prolly mask input is different.

anyway, just rebuild it yourself, something like:

CODE
   footage
      |
      |       animated_mask
      |            |
color_correction---/

as said there are probably more sophisticated ways, but it's start.
++ chris

[user_deleted]

Yes, it works!!!

Thanks again chris