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Found 13 results

  1. I've got a 2D null object with motion tracking data applied to it. I need the position of a 3D light to follow the position of that 2D null object and show up correctly. Obviously, when I parent the position of the 3D light to the 2D null position---it doesn't align properly. I'm trying to figure out how to use an expression to convert the world space position of the 3D light to the comp space of the 2d null. (I think I am describing that correctly? I don't think I fully understand layer space vs comp space) I tried searching the forums on mograph.org for this and I couldn't find a clear answer, if one at all. I've been digging through the interwebs for hours. Sorry If I missed a thread with the answer! Any help would be greatly appreciated! Thanks guys! -Jordan
  2. Hello, I have tracked some footage off a phone screen so that i can composite some new animated footage on the phone. Now the track is fine but when i apply the tracking data to the new footage (corner pin) i see a small edge on the outside. This is because the footage is scaled (corner pinned) to fit the motion of the phone. What i want to do is scale the entire footage just a bit. Is there a way to add a overall scale so that i don't have to scale every single tracked keyframe? Hope someone can help me?! Cheers, Thierry
  3. Hi guys, I want to share with you the blog I started about my obsession of expression writing in After Effects. It is more of a teaching course for people who know already a bit about expressions and who want to better themselves on this topic. I explain step by step what each piece of code does and how to make it your own. You can also download the final block of code in the form of FFX presets. please come visit! http://aexpr.wordpress.com
  4. So I had this idea after reading an article about how they created the lens flares in Gravity to try to recreate something similar in After Effects. http://www.3dartistonline.com/news/2013/12/creating-gravitys-earth-stars-an... So the idea is to photograph a led light shining straight into the lens in a 16x9 pattern giving me 144 stills. I'm thinking that it should be possible with expressions to link a null object with expressions and time remapping so when you move the null across the comp the flare images swap to image with corresponding placement of the flare in the grid. I've looked at some expressions that for instance swaps a mouth according to rotation or an up and down slider. https://vimeo.com/11602929 But I need it to change according to it's x AND y position. So just to clarify. Say we have an 1080p comp and we divide it in a 16x9 pattern, each pattern is 120x120px. If the null is anywhere inside the upper left pattern (x,y=0,0 > x,y=119,119) we see FlareImage01. If we move the null to say x,y=120,0 we see FlareImage02. x,y=240,0 FlareImage03... up to FlareImage16 But if the null moves down on the y-axis to x,y=0,120 we see FlareImage17. I realize it will probably be a bit choppy result since there isn't any transitions between the images. I'm more interested if it's possible to create. So if someone has any ideas how to solve it or any good links with similar solutions pleas let me know! Thanks!
  5. Hey Mograph, I thought I'd post another one of my long-ass tutorials here. This one is a little more advanced so maybe the mograph crowd will dig it. I talk about animating a box rolling correctly across a surface in After Effects. It's actually tricky because the point of rotation doesn't stay in one spot, so it took some finagling (expressions) to make it work. In the video I show you: • How to animate the cube once the rig is built, using our Animation Principle buddies • How to recreate the rig from scratch I also give away the rig on the video page in case you just feel like trying it out. I hope you guys get some useful info out of this. I have a few more advanced-ish videos coming out and I'll post those here as well. We're on Day 19 of 30 Days of After Effects if anyone is counting... besides me, I mean. Day 19: Rig 'n Roll a Box in After Effects
  6. Mograph, This is the most expression-stuffed tutorial I've ever done. May God have mercy on my soul. joey Day 06: MIDI-Controlled Animation Part Deux
  7. Hi guys, So i have a shape layer with an animated position copied and pasted from a path. This is preComped and looped forever. This preComp is also preComped again within a master comp. I want to take the position of the original shape layer and apply it to a null (that is in the master) so that is at the current position that the shape layer is at the current time within the master comp. How can i do this please? N.B. This isn't as simple as just pickwhipping the layers position because of the time remap/ layer starting at a time other than zero in the main comp, there needs to be an offset. I found something that is pretty much the reverse of what i need from Dan Ebberts on the Cow for doing something similar but linking to a slider but can't figure out how to reverse it for this purpose. offset = comp("main comp").layer(thisComp.name).startTime; comp("main comp").layer("controls").effect("Angle Control")("Angle").valueAtTime(time + offset);
  8. In this tutorial we will look at how to sync 2D mouth movements to audio using After Effects expressions.
  9. I'm getting a hell lot of “stack overrun” errors, when rendering via BG Render from After Effects CS5 (Rendering in the AE render queue works fine). The setup is pretty simple: a bunch of layers parented to a null, which is animated with a “time*x” expression on Y position. I'm sure i've done similar setups a hundred times before without any problems. Any idea what's causing the error? I thought stack overruns usually happen when there are too many cascading dependencies between too many layers - which definitely isn't the case here.
  10. Hey guys! We just posted a new tutorial on how to get a squash & stretch effect in After Effects. The tutorial is up on the site, and if you sign up for our newsletter we have a VERY detailed video on how we built an auto-squash-and-stretch rig with expressions, as well as the rig itself and a coupon for $20 off of our Cinema 4D plugin, Scenery. Check out the tutorial! I hope it's helpful. Comments / questions are always welcome. Thanks mograph! http://www.schoolofmotion.com/animating-squash-stretch-in-after-effects/ joey
  11. Hey guys, just put up a new tutorial for fans of expressions. We go pretty deep, building a rig that has a lot of automatic features and makes it easy to create carousels for logos, images, etc... I also posted the rig on the site to download for free. I hope you all find this helpful! http://www.schoolofmotion.com/carousel-rig-in-after-effects-with-expressions/ Joey
  12. Hey guys! First some background on the project, if you're curious. For tl;dr pop down to the second paragraph. I'm woking on a scene in C4D where I want a "trail" coming off an object to bank along with that object as it moves through space. Right now I have a long thin rectangle nested in a Sweep NURBS along with a Tracer Object. This produces the trail I want, but because the Sweep NURBS does not look at the rotational values of my rectangle, there's no banking occurring even if the rectangle would be constrained to the bank of the object which is producing the trail. The solution I've hatched up (which seems close to working) is to use xpresso to connect the bank of the leading object directly to the initial rotation found within the 'details' section of the sweep NURB. The only problem now is that the value of the Sweep NURBS internal rotation feature is mapped from two user-determined values on a 0-1 scale...not a true degree system. Mine is set to the default of -180˚ to 180˚, meaning that a rotational value of 0 would be entered into the graph as the exact midpoint, 0.5 . The challenge I have is finding a formula to convert my bank rotation into a 0-1 scale that reflects rotation between -180˚ and 180˚. Does anyone have any tips on performing this sort of operation in C4D, or might know any resources worth consulting? Thanks!
  13. Hey everyone, Just wanted to give you heads up on the new preset and tutorial I have just released on QubaHQ. In this tutorial I will demonstrate the use of a new free preset from QubaHQ.com – Floaties. Floaties is a text animator based fake particle simulator allowing you to create floating specs of dust, glitters, bokeh-style out of focus abstract backgrounds and other visual elements. It attempts to emulate some of the basic behavior found in Trapcode Particular, providing limited, but free alternative to that popular plugin (as long as you are going for a certain visual style). Running time: 51min Difficulty: Easy Required tools: After Effects The tutorial can be found at: http://qubahq.com/20...orial-floaties/
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