Advanced OSG collision detection

osg Advanced collision detection

       osgUtil Encapsulates the RayIntersector、LineSegmentIntersector、PlaneIntersector Intersector , Respectively used for three-dimensional space rays 、 Line segment 、 Plane and scene osg::Node Intersection of , This paper mainly analyzes the application codes of three intersectors 、 Then analyze the code structure of its internal implementation , At the same time, the characteristics and application scenarios of its intersection are analyzed , And realize a collision detection intersection for point cloud .  

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Catalog

• 1 Application and analysis of plane intersector
• 2 osg Realize the collision detection of point cloud

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Content

• 1 Application and analysis of plane intersector

        osg The base class of the intersector in is osgUtil::Intersector, This class is a pure virtual class , Through it, five intersectors are inherited , They are group intersectors 、 Line segment intersector 、 Plane intersector 、 Polyhedral intersector 、 Ray intersector , This example mainly explains the line segment intersector 、 Plane intersector 、 Ray intersector . The three intersectors are applied in different scenarios , The ray intersector can be used to select the model , That is, the starting point and direction of the ray are known , Find the intersection with the model ; The line segment intersector can be applied to the intersection of line segment and model , Typical scenarios such as model generation DEM（ Digital elevation model ）, Known model