Thank you for your reply.
Which variable represent the intersection point? Thanks

Best Regards
Wu Yang

"Christopher James Huff" <chr### [at] maccom> wrote in message
news:chr### [at] netplexaussieorg...
> In article <3dcb3cd8$1@news.povray.org>,
>  "Wu Yang" <wya### [at] cswrightedu> wrote:
>
> >     I want to get the (x,y,z) values of all Intersection points. The
> > following is what I added into the Intersect_Mesh() function in mesh.cpp
> > file:
> >
> >     found = intersect_bbox_tree(Mesh, &New_Ray, Ray, len, Depth_Stack);
> > // return(intersect_bbox_tree(Mesh, &New_Ray, Ray, len, Depth_Stack));
> >   }
> >   if (found == true)
> >   {
> >    ofstream output;
> >    output.open("C:\\Documents and Settings\\Wu Yang.WORK\\My
> > Documents\\project\\out.dat",ios::out|ios::app);
> >    if (Ray->Initial[0] == 20)
> >    {
> >     output << Ray->Initial[0] << " " << Ray->Initial[1] << " " <<
> > Ray->Initial[2] << " "
> >      << Mesh->Data->Vertices[0][0] << " " << Mesh->Data->Vertices[0][1]
<< "
> > " << Mesh->Data->Vertices[0][2] << " "
> >      << Mesh->Data->Vertices[1][0] << " " << Mesh->Data->Vertices[1][1]
<< "
> > " << Mesh->Data->Vertices[1][2] << " "
> >      << Mesh->Data->Vertices[2][0] << " " << Mesh->Data->Vertices[2][1]
<< "
> > " << Mesh->Data->Vertices[2][2] << " ";
> >     output.close();
> >    }
> >   }
> >
> >     Is it right?
>
> Well, this only affects meshes, it won't give you all intersections,
> only mesh intersections. You open and close the file for every
> intersection, this is going to be slow. You also don't return the value
> you put in "found", you need to do that. And finally, you never touch
> the intersection point information, you write out the ray origin and
> triangle vertices. Your messages haven't been very clear in the past,
> maybe this is what you really want, but the "intersection point" is
> where the ray hits the object, the "origin" is where it the ray comes
> from ("Initial" in the ray struct).
>
> --
> Christopher James Huff <cja### [at] earthlinknet>
> http://home.earthlink.net/~cjameshuff/
> POV-Ray TAG: chr### [at] tagpovrayorg
> http://tag.povray.org/

Post a reply to this message