[ODE] small sized capsule on heightmap problem
rodkay at mullum.com.au
Fri Sep 29 04:54:26 MST 2006
On Thursday 28 September 2006 21:58, Martijn Buijs wrote:
> I did a variety of tests with very small objects before I submitted the
> code (things may have changed since) and never encountered similar
> problems. Those objects where similar in size as your capsule.
I've played with test_heightfield a bit, and if I reduce the radius of the
capsules, an instability shows up now and then ...
... from test_heightfield.cpp ...
else if (cmd == 'c')
sides *= 0.005; // *** reduced from 0.5 !
obj[i].geom = dCreateCapsule (space,sides,sides);
With the smaller radius, a capsule seems to fling off into space, or
possibly disappear beneath the terrain.
> I suggest you check for negative geom dimensions (not sure if those are
> valid or handled well by ODE). Also, if the mass is to great the object
> would continuously penetrate, sink into the ground and "float" up again.
Pretty sure the dimensions and masses are ok ... denisty of 1.0
> Have you tried replacing the terrain with a plane? dHeightfield uses planes
> for collisions internally, if it is a collision issue/bug it may occur with
> planes as well.
Not yet ... might try if I get some spare time.
More information about the ODE