[osg-users] Draw Instanced intersections

[tianzjyh]

Hi, Oliveira,


there maybe many reasons that why no intersection. I cannot give you advise without more information. u can check about examples within OSG source code, e.g. "osgintersection".


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Cheers, 
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TianZJ






At 2017-01-03 17:55:02, "Bruno Oliveira" <bruno.manata.oliveira at gmail.com> wrote:

Hi TianZJ, Thanks for the quick answer.


I checked the intersector, but intersector->getIntersections() returns no intersections at all.





2017-01-03 9:32 GMT+00:00 tianzjyh <tianzjyh at 126.com>:

Hi, Oliveira,
    You can check the intersections of your intersector(e.g. LineSegmentIntersector::Intersection), and you will find they contain an "osg::NodePath", which means the whole path of the node(e.g. matrix transform nodes upon the drawable instance).



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Cheers, 
---
TianZJ

At 2017-01-03 16:58:16, "Bruno Oliveira" <bruno.manata.oliveira at gmail.com> wrote:

Hello,


I'm implementing a draw instanced optimized scene. This is for drawing a set of polygons.


Previously I was creating a drawable for each polygon, but now I am using draw instancing. With one drawable per polygon I can easily use osg intersectors for computing scene intersections. But how can I perform scene intersections with draw instanced objects and get, for instance, intersected instance IDs?






 


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