clipka <ano### [at] anonymousorg> wrote:
> Am 11.10.2017 um 16:35 schrieb And:
>
> >>> So I see that it states an "inside_vector <0,0,1> "(from poseray) in the last
> >>> item in each mesh2 object. It does not contain sufficient information.
> >>
> >> With that statement, the mesh should work fine in CSG difference (or
> >> intersection or union, for that matter).
> >>
> >> Not sure what you mean by "it does not contain sufficient information".
> >
> > Because there is just one vector <0,0,1> at the end, I suppose that it should
> > be a lot of vectors. Maybe each face have one vector, and should vary from face
> > to face, I don't know。。。 I suppose it should look like
> > that.
>
> No; there is only one `inside_vector` per mesh; it tells POV-Ray that in
> order to test whether a given point is inside the mesh or not, it should
> shoot a ray in the direction specified by that parameter, and count the
> number of surfaces encountered in that direction. If the count is odd,
> the point must be inside the mesh; if the count is even, the point must
> be outside.

Well, that it seems poseray adds a symbolic vector, because <0,0,1> does not
inside my model in fact. And it shouldn't get such an information because the
mesh was output from sketchup it does not contain that, moreover most of the
mesh 3d model does not have a well construct that contain a inside/ outside
distinction.

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