pyode-user

[Pyode-user] GeomRay

[Fred B. <fl...@ys...>]

I was going to replace my own ray tracing code, to use GeomRay and 
collide, but I'm not sure how to get the GeomRay positioned and oriented.

I wrote some simple code to create a matrix to orient the ray, but then 
when I go to position it:

  File "ccluster.py", line 511, in trace_root
    ray.setPosition(pstart)
  File "geomobject.pyx", line 135, in ode.GeomObject.setPosition
ValueError: Cannot set a position on non-placeable geoms.

?

What _should_ I be doing?

Re: [Pyode-user] GeomRay

[Chris B. <chr...@gm...>]

On 26/02/06, Fred Burton <fl...@ys...> wrote:
>   File "ccluster.py", line 511, in trace_root
>     ray.setPosition(pstart)
>   File "geomobject.pyx", line 135, in ode.GeomObject.setPosition
> ValueError: Cannot set a position on non-placeable geoms.
>
> ?
>
> What _should_ I be doing?

According to the ode manual you should be using
GeomRay.set(px,py,pz,dx,dy,dz) to set the position and direction.

Re: [Pyode-user] GeomRay

[Chris B. <chr...@gm...>]

On 27/02/06, Fred Burton <fl...@ys...> wrote:
>
> > According to the ode manual you should be using
> > GeomRay.set(px,py,pz,dx,dy,dz) to set the position and direction.
> >
>
> Hmm...
>
> ray.set takes two parameters
>
> (or some such)
>
> I've tried ray.set((px,py,pz,dx,dy,dz)) ...

Use the source, Luke:

(in geoms.pyx)
cdef class GeomRay(GeomObject):
...
    def set(self, p, u):
        dGeomRaySet(self.gid, p[0],p[1],p[2], u[0],u[1],u[2])

ie. set() takes a pair of tuples (or lists), and calls dGeomRaySet
with the contents.