Extended the Poisson Disk and Regular Grid samplers to 3D.
Extended the Poisson Disk and Regular Grid samplers to 3D.

- Both allow sampling of a box, sphere, or cylinder.

- Sampling of 2D domains, rectangle or circle, is possible by sampling a box with zero size in the z direction or a cylinder with zero height, respectively.

PedroTrujilloV/chrono,projectchrono/chrono,Bryan-Peterson/chrono,projectchrono/chrono,rserban/chrono,projectchrono/chrono,PedroTrujilloV/chrono,hsu/chrono,PedroTrujilloV/chrono,jcmadsen/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,projectchrono/chrono,armanpazouki/chrono,armanpazouki/chrono,Milad-Rakhsha/chrono,amelmquist/chrono,jcmadsen/chrono,rserban/chrono,armanpazouki/chrono,amelmquist/chrono,rserban/chrono,tjolsen/chrono,dariomangoni/chrono,Bryan-Peterson/chrono,jcmadsen/chrono,dariomangoni/chrono,rserban/chrono,andrewseidl/chrono,Bryan-Peterson/chrono,Bryan-Peterson/chrono,jcmadsen/chrono,amelmquist/chrono,armanpazouki/chrono,hsu/chrono,dariomangoni/chrono,PedroTrujilloV/chrono,Milad-Rakhsha/chrono,amelmquist/chrono,PedroTrujilloV/chrono,andrewseidl/chrono,tjolsen/chrono,tjolsen/chrono,jcmadsen/chrono,Bryan-Peterson/chrono,jcmadsen/chrono,andrewseidl/chrono,rserban/chrono,armanpazouki/chrono,jcmadsen/chrono,hsu/chrono,amelmquist/chrono,dariomangoni/chrono,andrewseidl/chrono,andrewseidl/chrono,Milad-Rakhsha/chrono,hsu/chrono,dariomangoni/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,hsu/chrono,tjolsen/chrono,rserban/chrono,tjolsen/chrono,rserban/chrono,dariomangoni/chrono,projectchrono/chrono,amelmquist/chrono