Kirosana Posted October 19, 2015 Share Posted October 19, 2015 Hi, i'm facing a problem that is really annoying.I'm trying to setup a pile of grain on a non-flat surface and the volume I use has part of it inside the non-flat surface. (If i'm not clear, the HIP with my message show a basic setup of what i'm trying to do) At initialization, all the grain are exploding. I tried to use a PopWrangle with "@v = 0" for the first two secondes but it does a weird thing. I tried having 10 Substeps + 150+ Constraint Iterations but same, doesn't change anything and it's still exploding.If someone can explain to me what i'm doing wrong. Would be amazing Thank you ! Grain_Init.hip Quote Link to comment Share on other sites More sharing options...
Sankar Kumar Posted October 19, 2015 Share Posted October 19, 2015 Change "Velocity Blend = 0 " This will stop explosion. Simulate till the pile settle save the settled frame for initial state. Later change the velocity blend to 1 Quote Link to comment Share on other sites More sharing options...
Kirosana Posted October 19, 2015 Author Share Posted October 19, 2015 (edited) Thank you !And I want to ask you one more question. My pile is like melting on the floor until it's completly flat. How can i keep the shape i get from my geometry ? If I want to keep a pyramide or a box with noise on it for example ?Many thanks. Edited October 19, 2015 by Kirosana Quote Link to comment Share on other sites More sharing options...
Sankar Kumar Posted October 19, 2015 Share Posted October 19, 2015 Enable "Update Collisions During Iterations" will fix the issue Quote Link to comment Share on other sites More sharing options...
Kirosana Posted October 19, 2015 Author Share Posted October 19, 2015 The Update Collisions during Iterations doesn't change anything :/ Quote Link to comment Share on other sites More sharing options...
Sankar Kumar Posted October 19, 2015 Share Posted October 19, 2015 Let me check your file.. And tell you what was wrong Quote Link to comment Share on other sites More sharing options...
Sankar Kumar Posted October 19, 2015 Share Posted October 19, 2015 Its my fault, Keep Velocity blend above 0, This is creating the melting issue try some non zero values Quote Link to comment Share on other sites More sharing options...
Kirosana Posted October 19, 2015 Author Share Posted October 19, 2015 I don"t see any real changes if I put like 0.001 in Velocity Blend. Instead, if I put a higher value in Drift Threshold (around 0.5), they stop moving quicker? I don't know if it's a good method but it does the trick i guess. Quote Link to comment Share on other sites More sharing options...
Sankar Kumar Posted October 19, 2015 Share Posted October 19, 2015 Don't change "Drift Threshold" It will cause irregular particle settling. Check the attachments hip file and mov file Grain_Init v2.hip Grain_Init v2.mov Quote Link to comment Share on other sites More sharing options...
Kirosana Posted October 20, 2015 Author Share Posted October 20, 2015 Ok I see how you did it. but the thing is I can't have the explosion at the beginning. It destroy my initial shape. In any case, i think i found a trick for my sim to blend a fixe state and the moving part.Thank you for your help Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.