cspears2002 Posted September 18, 2008 Share Posted September 18, 2008 This is a continuation of my burrowing under a brick road project. However, since my focus is different, I decided to start a new thread. I want to create dust as the bricks are being disturbed. I asked a colleague at work about this, and he suggested that I scatter points on the bricks and assign a velocity attribute to the points. Once the the velocity of the points reach a certain value, then they should birth particles. I combined this suggestion with a hack I found in Craig Zerouni's "Houdini On the Spot" book (page 84). He shows a method where a Trail SOP is used to compute the velocity of some geometry and the velocity is promoted from a point attribute to a detail attribute. Then the user can use the detail() expression in the Source POP to birth particles. However, this solution causes all of the points scattered across the bricks to start birthing particles! I want only the points on the moving bricks to birth particles. Any suggestions? brick_road_v16.hipnc Quote Link to comment Share on other sites More sharing options...
MIguel P Posted September 18, 2008 Share Posted September 18, 2008 Hi, I think something like this is easier and also faster. brick_road_v16.hipnc Quote Link to comment Share on other sites More sharing options...
old school Posted September 19, 2008 Share Posted September 19, 2008 Nice example. I had to add CHOPs and some lag to the bricks. Adds just that bit extra to the initial bursting up. brick_road_v17.hipnc Quote Link to comment Share on other sites More sharing options...
old school Posted September 19, 2008 Share Posted September 19, 2008 OK I couldn't help myself. Added some particle dynamics including a trivial vop network wrapped around Curl Noise. I also had the file deloused. brick_road_v17.hip Quote Link to comment Share on other sites More sharing options...
Jason Posted September 19, 2008 Share Posted September 19, 2008 vop network wrapped around Curl Noise. As an aside, Jeff - Curl Noise seems so handy for POPs don't you think it'd be a good idea for SESI to distribute a nice little Curl Noise Force / Wind vopnet OTL, as a companion to the other forces already available? Quote Link to comment Share on other sites More sharing options...
old school Posted September 19, 2008 Share Posted September 19, 2008 I couldn't agree with you more Jason. Submitted the RFE. ID=32503 Quote Link to comment Share on other sites More sharing options...
cspears2002 Posted September 22, 2008 Author Share Posted September 22, 2008 Thanks! I'll crack open the file and take a look! I didn't know that I would learn so much by moving some bricks around. Quote Link to comment Share on other sites More sharing options...
jason_slab Posted September 25, 2008 Share Posted September 25, 2008 (edited) OK I couldn't help myself.Added some particle dynamics including a trivial vop network wrapped around Curl Noise. wow, cool noise!! quick particle test, rendered with PBR particle_curl_PBR EDIT: how can i get the correct orientation of the particles in the VOP? jason Edited September 25, 2008 by jason_slab Quote Link to comment Share on other sites More sharing options...
cspears2002 Posted October 1, 2008 Author Share Posted October 1, 2008 OK I couldn't help myself.Added some particle dynamics including a trivial vop network wrapped around Curl Noise. I also had the file deloused. brick_road_v17.hip I was checking out the VOP network. What does the Complement and the Clamps VOP do? I removed them and didn't notice any significant changes in the motion. Quote Link to comment Share on other sites More sharing options...
MIguel P Posted October 1, 2008 Share Posted October 1, 2008 I was checking out the VOP network. What does the Complement and the Clamps VOP do? I removed them and didn't notice any significant changes in the motion. The complement vop does 1-input, and the clamp vop limits the input to a minimum and a maximum value. 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.