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{"id":2310,"date":"2018-04-13T02:24:11","date_gmt":"2018-04-13T01:24:11","guid":{"rendered":"http:\/\/boris-mc.com\/?p=2310"},"modified":"2018-04-13T10:32:45","modified_gmt":"2018-04-13T09:32:45","slug":"time-travel-my-friend","status":"publish","type":"post","link":"https:\/\/boris-mc.com\/?p=2310","title":{"rendered":"TIME TRAVEL, MY FRIEND"},"content":{"rendered":"

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tl;dr:\u00a0<\/strong>Become Marty McFly within Nuke.<\/p>\n<\/div><\/div>\n

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Time travel is cool, Nuke is cool, therefore time traveling on Nuke is…you name it.
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Anyway, time-traveling sort of means that you can experience time as a solid state dimension which you can transverse<\/strong> back and forth, forth and back, so on a so forth. Would not it be cool to have a slider to go back (or forwards) in time sometimes? I\u00b4m pretty sure it would, although it might be a little weird at first.<\/div>\n
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Now, the little Python-powered Gizmo I got this time to introduce you guys attempts to let you do so, on Nuke<\/strong>. Maybe you are pretty happy with how linear time works in general and will never have to use it at all, but in case you happened to, it may come in handy.<\/div>\n
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1 – What\u00b4s this (really) about.<\/strong><\/div>\n
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As you well know, time managing in Nuke is quite flexible<\/strong>, and there is already a lot of tools dealing with time (Retime, TimeWarp, TimeEcho…). In a way, my so-called “B_traail<\/span><\/strong>” tool is an “on steroids” version of the TimeEcho Nuke Node, in that it allows you to see in a still image the difference in movement occurred during a given lapse of time. Here\u00b4s an example.<\/div>\n
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On steroids, because that\u00b4s pretty much all the TimeEcho Node allows you to do, whereas my little Gizmo creature adds a fair amount of extended functionality. Other than just to “plotting” time, you can also\u00a0retract both ends of the animation, apply different temporal reduction factors, select multiple merging operations, apply and invert different gradients (linear, quadratic & double-quadratic), time-recolor, and more.\u00a0<\/strong><\/div>\n
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To better illustrate this, I\u00b4ve prepared a simple radial animation with a Roto node, a bunch of Transform nodes and a Merge. Without applying any additional operation, the animation looks like this.<\/p>\n

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Ok, let\u00b4s now bring in a B_traail<\/span><\/strong> gizmo and see what we can do with this amazing animation. And just to give you an idea before we get a closer look at the tool, here we have a few examples of what kind of results we could end up having out of the animation by playing a little with it<\/strong>.<\/p>\n

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2 –\u00a0 Understanding it.<\/strong><\/div>\n
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If you look carefully at these images, you will notice that they represent the animation plotted in one image: 75 frames in only one.<\/strong> Additionally, you may also perceive that there are some alterations in the way those moving dots are shown in the present<\/strong> moment<\/strong><\/em>, with respect to how they were<\/em><\/strong>: different gradients and merging operations have been applied, both ends of the animation can be retracted to limit the range that we see in one frame, color-over-time has also been applied, and even the temporal density has been dealt with according to different reducing factors. Last but not least, all those parameters can, of course, be animated<\/strong>.<\/p>\n

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At this point, I\u00b4m hoping that the idea has become clear. Probably you have already figured that we could apply this tool to any moving, masked out character to create a trail that we can play with later on, or to a bunch of moving cars to create a long exposure kind of effect<\/strong>. The applications are endless and I can\u00b4t wait to see what you guys come up with.<\/div>\n
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3 – User guide<\/strong><\/div>\n
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Let\u00b4s now take an in-depth look at the properties bin of the B_traail<\/span><\/strong> tool to examine its knobs and see what they do. It\u00b4s only a 2 minutes video, don\u00b4t be lazy and check it out<\/p>\n