[ODE] Determining if a point is inside a geom

Shamyl Zakariya shamyl at zakariya.net
Tue May 8 13:32:18 MST 2007


I saw those functions, and they looked useful for everything but  
trimeshes. But, because of trimeshes I'm aiming for a more all- 
purpose solution.

shamyl at zakariya.net
     lorem ipsum dolor sit amet,

On May 8, 2007, at 4:25 PM, David Walters wrote:

>> I'm trying to come up with a quick way to test if a point is inside a
>> geom, primarily so I can check if a lightsource goes inside a shadow-
>> caster but I imagine it will be useful elsewhere. I've taken two
>> approaches, but both only work for trimeshes ( significant! ) and not
>> for primitive types such boxes, capsules, etc.
> Hi, if you take a look at the latest heightfield code - in
> dCollideHeightfieldZone there's a switch at line 958 - here a
> dGetDepthFn pointer is set based on geom type.
> Further down at line 1460 this pointer, if set, is used to determine
> if a proposed contact penetrates the geom. If the pointer is NULL
> (i.e. trimeshes) then an alterantive ray cast solution is used.
> Now I'm not saying this is going to help you too much, but I feel like
> I've given you some information here by pointing out the
> dGeomXXXPointDepth functions which return > 0 for a point if it's
> inside a geom.
> Regards,
> David Walters
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