jjstanley Posted February 21, 2006 Share Posted February 21, 2006 Hi, I was wondering if there is a way to loop a SOP node. I want to try something were I apply a transform and then on every frame go back and do the same operation to the selected points again for a set number of steps. Sort of like ray marching I guess? Quote Link to comment Share on other sites More sharing options...
anakin78z Posted February 21, 2006 Share Posted February 21, 2006 not sure if I get what you're saying.... If you want to apply the same effect again every frame (so say you move it up by 1 on frame one, then another 1 on frame two for a total of 2), and you can't write an expression for it, use sop solvers, since they'll let you carry over changes to the next frame. Quote Link to comment Share on other sites More sharing options...
ivan Posted February 22, 2006 Share Posted February 22, 2006 look at the feedback example on the tutorials page... http://odforce.net/tips/ Quote Link to comment Share on other sites More sharing options...
Jason Posted February 22, 2006 Share Posted February 22, 2006 look at the feedback example on the tutorials page...http://odforce.net/tips/ 24951[/snapback] Please look at the SopSolver DOP. The SopSolver is an extremely powerful system that can handle all this, and you have full access to the other niceties DOPs provides (such as caching). Hope this helps! Quote Link to comment Share on other sites More sharing options...
jjstanley Posted February 22, 2006 Author Share Posted February 22, 2006 Thanks for your replys. The Sopsolver DOP looks like it should work great but having some trouble getting it working. Still trying to get the feel for DOPs =) Say tha I have a grid and then want to take some points on the grid and move them up by 1 on every frame, how would I connect the nodes? Quote Link to comment Share on other sites More sharing options...
craig Posted February 22, 2006 Share Posted February 22, 2006 Thanks for your replys. The Sopsolver DOP looks like it should work great but having some trouble getting it working. Still trying to get the feel for DOPs =) Say tha I have a grid and then want to take some points on the grid and move them up by 1 on every frame, how would I connect the nodes? 24986[/snapback] This doesn't answer your question directly - it changes the colors of each point based on the frame number , rather than the position- but it shows the structure of the solution. Though I have to say that simply wanting to move some points based on the frame number seems like it doesn't require something as complicated as this. Can't you stay in SOPs with the group SOP and a point SOP to do what you want? sopSolverColor.hip Quote Link to comment Share on other sites More sharing options...
jjstanley Posted February 23, 2006 Author Share Posted February 23, 2006 This doesn't answer your question directly - it changes the colors of each point based on the frame number , rather than the position- but it shows the structure of the solution. Though I have to say that simply wanting to move some points based on the frame number seems like it doesn't require something as complicated as this. Can't you stay in SOPs with the group SOP and a point SOP to do what you want? 24990[/snapback] I'll have a look at your file tonight. What I want to do is create a rolling tunnel wave for a surfer to ride. Most solutions I have found break down once the crest of the wave goes forward of the inside of the curl. My idea was to hav a bounding shape which would move across the grid. The longer that a point is withing the bounding area the higher it rises and the more it curls. There may be a better way to go about this problem and if any of you have any ideas I would love to hear them. My only other solution that does sort of work was to model the wave at diferent stages and use a sequence blend. It does work but I would like to find a procedrual approach which could be applied on a larger scale. Quote Link to comment Share on other sites More sharing options...
edward Posted February 24, 2006 Share Posted February 24, 2006 Don't forget that POPs is also a naturally "iterative" operator type. So perhaps building geometry off of POPs? I don't know how time coherent that would be though ... Quote Link to comment Share on other sites More sharing options...
sibarrick Posted February 24, 2006 Share Posted February 24, 2006 Maybe worth looking at an isosurface approach for the actual model, that way it can intersect back with itself and get absorb correctly. Quote Link to comment Share on other sites More sharing options...
jjstanley Posted February 25, 2006 Author Share Posted February 25, 2006 Thanks for the ideas, it is really helping. I have some new ideas to try that I just wasn't able to get on my own. I'll post when I get something along the right track. Quote Link to comment Share on other sites More sharing options...
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