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Found 2 results

1. ## transforming a Vex-built PolyLine

Hello to all! I am currently writing a wrangle-thing in which I'm hoping to generate a random "hair" on every point and make it face the normal of said point. The way I planned it is as follows: 1. create the hair w/ random params on 0,0,0 2. rotate the hair to Normal of the point that it's "generated on" w/ rotate(matrix,angle,vertex) function 3. Move the hair to @P I'm not a hero with vector math, otherwise I'd generate the whole hair thing along a normal. I wonder if I somehow can construct a identity matrix, like one would do with the ident() function, and use that to transform the prim. Is there a way to simply rotate a primitive using something simpler than extreme vector math? sgamhar.hip
2. ## "active" infection based growing solver doesn't cook well

Hey! I was going through some tutorials on growth solvers, and I noticed that a lot of them are driven by the "food" group looking to get "infected" if you know what I mean. I wanted to try and make a growth solver that workes differently, looking instead at the points that are already infected and infecting more from their perspective. A very simple summation of what I'm trying to achieve: 1. List the points around me 2. If they are food, they are candidates 3. Infect only 1 of the found candidates rinse and repeat I've put the code underneath in a point wrangle in a solver, but it doesn't work well. I tried running the command on the seperate food and infected groups but that doesn't seem to improve either. What happens when it doesn't go well: 1. nothing 2. Almost every point gets put into the infected group in 1 framespan and then the solver doesn't do anything anymore. //initialiation of radius to search for, and random seed; float radius = 0.2; float seed = 8008135; //stalking prey (finding a list of points to infect); int neighbours[] = nearpoints(0,@P,radius,5); //hopefully grabbing a random one out of the stack of many; float array_length= len(neighbours); //random number between 0 and the length of the list of neighbours; int targetp = rint( rand(seed) * array_length); //looking up point ID in list of neighbours; int point_to_infect = neighbours[targetp]; //actually infect the point, if it is food; if (point(0,"infection",point_to_infect) == 0){ setpointattrib(0,"infection",point_to_infect,1); }; I haven't any clue what's going on, I got no errors other than a little green line under the local variable "targetp" when it gets created. I've attached my .hip! It might be something else I'm doing wrong. I hope you can help me, thanks in advance, Sasbom active infection.hip
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