3dbeing Posted February 10, 2007 Share Posted February 10, 2007 does anyone know why in impact data I dont get ptnum primnum? Thanks. 3db Quote Link to comment Share on other sites More sharing options...
3dbeing Posted February 16, 2007 Author Share Posted February 16, 2007 anyone... anyone... anyone... Bueler... Bueler... Bueler... Quote Link to comment Share on other sites More sharing options...
old school Posted February 16, 2007 Share Posted February 16, 2007 You didn't dive down far enough in to the details view. If you just select the Impacts data, you won't see it. Open up the folder and select the Imacts subdata. Now you should see everything including the uv primitive location of the impact. Quote Link to comment Share on other sites More sharing options...
3dbeing Posted February 20, 2007 Author Share Posted February 20, 2007 Nope, that's where I was looking before, and just got this.. for now my simple test is just a polysphere with uv's added through a uvtexture sop, is there some other prep the geo needs to get this to work? Quote Link to comment Share on other sites More sharing options...
mtucker Posted February 20, 2007 Share Posted February 20, 2007 It all depends on the objects that are colliding and the collision detection method used between them. Different collision detection methods generate different information, and they fill in only those fields for which they have meaningful information. For example, the RBD collider compares the points of one object with the Volume of the other object. There is no way from that information to generate uv coordinates for the collision, so it doesn't fill out that information. Mark Quote Link to comment Share on other sites More sharing options...
3dbeing Posted February 22, 2007 Author Share Posted February 22, 2007 that is pretty vague...I guess I should rephrase my question to How do I get the point number and/or uv impact data into the details list of impact data.. Thanks Quote Link to comment Share on other sites More sharing options...
mtucker Posted February 23, 2007 Share Posted February 23, 2007 How do I get the point number and/or uv impact data into the details list of impact data.. Let me try to rephrase in terms specific to your case. You have two RBD Objects colliding with each other, yes? Well, the collision detection mechanism used by the RBD solver does not calculate point numbers or primitive UVs for the collisions. That's why those fields all contain uninitialized values. This is because the RBD collision detection doesn't detect collisions between the actual points and primitives of the geometry, it uses the volume representation of the objects (which has no correlation to the surface UVs or point numbers). What you do have is the position in world space of the collision. So you could use that information in SOPs to extract the nearest point/primitive/uv. But this will just be an approximation. Mark Quote Link to comment Share on other sites More sharing options...
3dbeing Posted February 23, 2007 Author Share Posted February 23, 2007 I hear what you are saying, but by that philosophy one would assume that by changing from volume collision to point or edge, one would then get the point and uv info in impact data, this however isn't the case, as of yet I have not found a setting where these numbers are relative, leading me to believe this is just a placeholder for something that doesn't yet work, if that is the case ok.. If not, I would very much like to see a rig where this info dose get filled out and what kind of prep is required. Thanks Quote Link to comment Share on other sites More sharing options...
mtucker Posted February 24, 2007 Share Posted February 24, 2007 No, changing the collision options for RBD objects does not cause those other fields to be filled out (as you've already discovered). Those other fields are used by different solvers. The POP Solver, for example, fills in the prim[uv] attributes. No solver fills out all the fields. Mark Quote Link to comment Share on other sites More sharing options...
3dbeing Posted February 26, 2007 Author Share Posted February 26, 2007 Ok, so this is not necesarily info for RBD, ok... Thanks for the info 3db 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.