Hi Maxime,
Maxime BOUCHER schrieb:
[...]
Peter Hrenka wrote:
You call the method accept(osg::NodeVisitor&) of your model (which is a
osg::Node).
See the example osgkeyboardmouse.
My bad, I should have seen it.
We certainly need an osgpolytopeintersector example...
Meanwhile "grep" is your friend.
Peter Hrenka wrote:
This exercise is about polygons not polytopes!
Yes, I meant "testing this way for each primitive".
Well... I fail to see an analogy here.
The point of Polytopes is that they are convex which makes
all kinds of tests very easy. If you want to modell something
non-convex (something like Constructive Solid Geometry) then
PolytopeIntersector will not help you as it is.
Peter Hrenka wrote:
As for the PolytopeIntersector: It will give you all points,
lines, triangles and quads which truly intersect the polytope volume,
given by the primitive index.
Sorry, I'm not sure I really understand.
It is possible to get the intersected triangle instead of just a list of
intersections coordinates?
The struct PolytopeIntersector::Intersection contains a int-member
"primitiveIndex" which probably is what you want.
There is code to output the primitiveIndex in the osgkeyboardmouse example.
You can access the first intersection with
PolytopeIntersector::getFirstIntersection() or the set of all
Intersections with PolytopeIntersector::getIntersections().
Cheers,
Peter
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