[Feature request] Exclude an object from btIDebugDraw

[lazalong]

Hey

Is it possible to exclude an object form btIDebugDraw ?

In my case I have a terrain shape (heightfieldShape) that generate a lot (>100'000) points when I use btIDebugDraw.
If I could exclude the terrain from drawing it would save a lot of lines being drawn as it kills the performance.

Any help appreciated.

[lazalong]

Bump ?

Should this be a feature request?

[mi076]

Debug draw of heightfield terrain is in fact very slow.
I have written once my own debug_draw_world function, it skips
TERRAIN_SHAPE_PROXYTYPE.

if (shape->getShapeType() == TERRAIN_SHAPE_PROXYTYPE)
{
// TODO
;;
}
else
{
m_dynamicsWorld->debugDrawObject(worldTrans,shape,color);
}

[lazalong]

Ok thanks

IMO it would be worthwhile to be able to exclude objects from debug (for example machine gun bullets or a static terrain).
Better to be able to retrieve the static objects at will (so that we create the debug meshes only once.)

Also btDiscreteDynamicsWorld::debugDrawObject() (and those in the other world type) could be modified with something like:

Code: Select all

  switch (shape->getShapeType())
  {
      case TERRAIN_SHAPE_PROXYTYPE:
      {
           if (ignoreTerrainShape) break;

           if (drawTerrainNearCamera)
           {
                // show terrain in a radius/aabb around the camera position
           }
           else
           {
                // draw all
           }
      }
      case SPHERE_SHAPE_PROXYTYPE:
      etc