JAVA Checking if a 3D object is within another 3D object/Bounds -

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i working on project on particle simulation and, in order simulate correct physical behavior, need make objects collide , bounce off. thing need check whether or not particle within central object (a cone). know in sphere class , in other primitives vecmath, there function .intersect(), perfect collisions. however, not find function .contains() check whether 1 object within (like in 2d library). of got suggestions and/or other libraries implement that? lot


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