Intersectionpicker in osgearth

OsgEarth in IntersectionPicker

       osgUtil Encapsulates the RayIntersector、LineSegmentIntersector、PlaneIntersector Intersector , Respectively used for three-dimensional space rays 、 Line segment 、 Plane and scene osg::Node Intersection of , The result of intersection is the coordinates of the intersection point , And other supporting information ,osgEarth The class selected for the target is provided in , If in osg::Earth::RTTPicker class 、osgEarth::IntersectionPicker, This article explains osgEarth::IntersectionPicker Simple usage and principle of .  

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Catalog

• 1 IntersectionPicker Introduction to the intersector
• 2 IntersectionPicker Class structure and key function analysis

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Content

• 1 IntersectionPicker Introduction to the intersector

    And osgEarth::RTTPicker Different （ front ”osgEarth Target selection “ Main explanation RTTPicker Usage of ,IntersectionPicker Get the picked object through the intersection of space , This also makes it compared with RTTPicker Have certain disadvantages , If it cannot be selected annotations、 be based on shader The geometry of （ As is common drape Pattern , It finally shows the geometry through a picture ）. Intersection and tradition osg Encapsulated intersector ,IntersectionPicker The intersection solver of supports point-to-point 、 Intersection of lines , By setting a search buffer To achieve .osgEarth::PrimitiveIntersector by IntersectionPicker The request used