bobster Posted July 6, 2004 Share Posted July 6, 2004 Description: Flock particles from a grid to a sphere. Copy an object to the particles. The copied objects need to orient themselves in mid flight so they land back on their base. The base of the object needs to sit on top of the grid and the sphere and not intersect them. Must be procedural. See attached mov file Enjoy I'll post my hip file later. challenge.mov Quote Link to comment Share on other sites More sharing options...
mark Posted July 6, 2004 Share Posted July 6, 2004 hi bobster, i'll give this a go. there seems to be a problem with the .mov file though - anyone else had problems? i thought it was a linux problem, but its not working here at work either on winXP. error is "challenge.0001.jpg required and not found" or similar. Quote Link to comment Share on other sites More sharing options...
bobster Posted July 7, 2004 Author Share Posted July 7, 2004 Ya, there is a problem with linux but it does play on my pc with winXP. Maybe it's the compression. I've tried a different compression so hopefully it'll work. Sorry about that. Here's the new download. challenge.256x195.sorenson.least.mov Quote Link to comment Share on other sites More sharing options...
Jason Posted July 7, 2004 Share Posted July 7, 2004 Nice challenge! Quote Link to comment Share on other sites More sharing options...
Lukich Posted July 9, 2004 Share Posted July 9, 2004 Here you go. challenge.mov Quote Link to comment Share on other sites More sharing options...
halion Posted July 9, 2004 Share Posted July 9, 2004 All I see is a black screen with a big white x. Quote Link to comment Share on other sites More sharing options...
mark Posted July 9, 2004 Share Posted July 9, 2004 thats an easy challenge - the white X on a black background Quote Link to comment Share on other sites More sharing options...
mark Posted July 9, 2004 Share Posted July 9, 2004 not sure if its too early to ask for hints or not, please say if it is. i have particles flocking from the grid to the sphere. heres what i need to work out: 1. i can only flock all points on the grid. you have 10 cones, which means you must have somehow grouped only 10 points to flock? a 3x3 grid is 9 points so you cant possibly be using all points in a grid. 2. similarly i cant control which points on the sphere the particles will flock to. suspect this is related to #1. 3. as for the rotation, well im guessing i need to align the cones to the normals of the sphere.. working on that Quote Link to comment Share on other sites More sharing options...
halion Posted July 9, 2004 Share Posted July 9, 2004 This is what I've been thinking. Grid as your source, the grid uses a impulse birth rate of 10 at frame 1 only. As for the rotation I was thinking something with the primitive sop. I don't know I'll figure something out.... maybe. Scratch the primitive plane. Quote Link to comment Share on other sites More sharing options...
bobster Posted July 9, 2004 Author Share Posted July 9, 2004 Sure Mark, clues are fine. Regardless of what the grid is you can emit from surfaces instead of points and then you can control exactly how many points you what, Impusle Activation $FF==1 Impusle Birth Rate 10. I'm attracting particles to the sphere randonly, so they specify where they're going to hit based on the drag and interact. The key to this effect lies in SOPs with the Ray SOP. Quote Link to comment Share on other sites More sharing options...
Lukich Posted July 9, 2004 Share Posted July 9, 2004 sorry, second take. Mine was done with CHOPs. challenge.mov Quote Link to comment Share on other sites More sharing options...
bobster Posted July 9, 2004 Author Share Posted July 9, 2004 Nice Lukich, CHOPs huh, interesting. I can't wait to see your hip file. Let's post the hips once we get more responses. Quote Link to comment Share on other sites More sharing options...
MG Posted July 10, 2004 Share Posted July 10, 2004 sorry, second take. Mine was done with CHOPs. It's a pity a few cones go through the sphere, but still very good. EDIT: I haven't been very active here lately, I'm going to give it a try aswell. Quote Link to comment Share on other sites More sharing options...
TheUsualAlex Posted July 10, 2004 Share Posted July 10, 2004 That's pretty cool! I hadn't thought much of using CHOP. Interesting indeed. Quote Link to comment Share on other sites More sharing options...
mark Posted July 11, 2004 Share Posted July 11, 2004 thanks for the tip halion, got 10 cones now Quote Link to comment Share on other sites More sharing options...
3__ Posted July 13, 2004 Share Posted July 13, 2004 ok here's my attempt. the rotations are a bit flakey though; sometimes a cone will just impact and stick without finishing their 180. depends on the seed. -cpb conechallenge.mpg Quote Link to comment Share on other sites More sharing options...
Lukich Posted July 14, 2004 Share Posted July 14, 2004 ok, I think it's time to show the hip. I'm looking forward to seeing other people's work because I didn't figure out a procedural way to make cones not go through the sphere. Here's mine. challenge7.zip Quote Link to comment Share on other sites More sharing options...
bobster Posted July 15, 2004 Author Share Posted July 15, 2004 Very Nice Lukich. Great use of CHOPs (which I'm still learning). Looks good cpb. How did you do yours? Mine was done in SOPs using the Ray SOP to calculate the distance from the sphere. I'll post my hip file soon. Hey TheUsualAlex, is that your son or you when you were a kid? Bob Quote Link to comment Share on other sites More sharing options...
FrankFirsching Posted July 15, 2004 Share Posted July 15, 2004 Ok, here is my attemp on this challenge. It's SOPs only. I'm trying to keep the cones outside of the sphere, but intercollisions between cones are not handled :-( Nevertheless, I used a nifty trick to create animation-paths for each cone procedurally. Hope you like it. flockSphere.zip Quote Link to comment Share on other sites More sharing options...
3__ Posted July 16, 2004 Share Posted July 16, 2004 auto generating paths, nice. this one is just ordinary pops and vops... -cpb cpb_conechallenge_tidy.zip Quote Link to comment Share on other sites More sharing options...
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