[ODE] get triangle index of a trimesh

[vicente conejeros]

thanks :D
  ----- Original Message ----- 
  From: Jaroslav Sinecky 
  To: adastra at inorbit.com ; vicente conejeros 
  Cc: ODE mailing_list 
  Sent: Friday, March 10, 2006 10:21 AM
  Subject: RE: [ODE] get triangle index of a trimesh


  So here goes the patch, maybe someone finds it useful or you can include it in unstable. It's pretty simple: after dCollide returns, call 

  int triIndex = dGeomTriMeshGetTouchedTriangle(g1, contactIndex);

  where contactIndex is the index in the list of returned contacts and g1 is the Trimesh geom involved in the collision.

  disclaimer:
  - Not implemented for ray or plane colliding with trimesh. Suppose should be similarily easy to implement though.
  - There is static buffer (64) to hold indexes. I believe if this overflows, it shouldn't crash, just some asserts will come out.
  - It's not completely robust, for example if you send contactIndex not consistent with immediately preceding dCollide call, result is undefined

  Performance impact should be negligible though.


  Cheers,
  Jaroslav
    -----Original Message-----
    From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf Of adastra at inorbit.com
    Sent: Thursday, March 09, 2006 12:22 PM
    To: vicente conejeros
    Cc: ODE mailing_list
    Subject: Re: [ODE] get triangle index of a trimesh


    I had the same problem with my indices. I just used my visualization software (VTK) to work it out.
    I used GetCell() and then GetPoints() for each cell and made an array with that data.

    Is there a way to do this using ODE without wasting processing time on finding the same index so many times?

    Jemma

      ----- Original Message -----
      From: "vicente conejeros" 
      To: ode at q12.org
      Subject: [ODE] get triangle index of a trimesh
      Date: Wed, 8 Mar 2006 14:44:22 -0300


      i'm trying to get the index of a [trianglemesh-(sphere,box,etc)] collision. i have read the documentation of ode, but i haven't read anything about that

      anyone knows how to make that?

      sorry for my english


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