explanaition for the alpha parameter of concave hull
explanaition for the alpha parameter of concave hull

git-svn-id: 5398946ba177a3e438c2dae55e2cdfc2fb96c905@646 a9d63959-f2ad-4865-b262-bf0e56cfafb6

krips89/pcl_newfeatures,Tabjones/pcl,starius/pcl,shangwuhencc/pcl,locnx1984/pcl,kanster/pcl,DaikiMaekawa/pcl,srbhprajapati/pcl,3dtof/pcl,Nerei/pcl_old_repo,MMiknis/pcl,fskuka/pcl,drmateo/pcl,ResByte/pcl,MMiknis/pcl,shyamalschandra/pcl,msalvato/pcl_kinfu_highres,chatchavan/pcl,lydhr/pcl,jakobwilm/pcl,damienjadeduff/pcl,wgapl/pcl,KevenRing/pcl,soulsheng/pcl,pkuhto/pcl,shivmalhotra/pcl,krips89/pcl_newfeatures,chenxingzhe/pcl,stefanbuettner/pcl,RufaelDev/pcc-mp3dg,shivmalhotra/pcl,jakobwilm/pcl,krips89/pcl_newfeatures,fskuka/pcl,RufaelDev/pcc-mp3dg,nh2/pcl,LZRS/pcl,cascheberg/pcl,nikste/pcl,jeppewalther/kinfu_segmentation,kanster/pcl,DaikiMaekawa/pcl,pkuhto/pcl,KevenRing/vlp,v4hn/pcl,kanster/pcl,mikhail-matrosov/pcl,jeppewalther/kinfu_segmentation,cascheberg/pcl,mschoeler/pcl,nh2/pcl,nikste/pcl,zhangxaochen/pcl,srbhprajapati/pcl,fskuka/pcl,ipa-rmb/pcl,soulsheng/pcl,ResByte/pcl,simonleonard/pcl,KevenRing/vlp,LZRS/pcl,ResByte/pcl,chatchavan/pcl,sbec/pcl,fskuka/pcl,LZRS/pcl,lebronzhang/pcl,v4hn/pcl,zhangxaochen/pcl,krips89/pcl_newfeatures,wgapl/pcl,locnx1984/pcl,msalvato/pcl_kinfu_highres,RufaelDev/pcc-mp3dg,sbec/pcl,shyamalschandra/pcl,raydtang/pcl,srbhprajapati/pcl,nh2/pcl,kanster/pcl,damienjadeduff/pcl,locnx1984/pcl,fanxiaochen/mypcltest,simonleonard/pcl,soulsheng/pcl,damienjadeduff/pcl,stfuchs/pcl,closerbibi/pcl,ipa-rmb/pcl,lebronzhang/pcl,mschoeler/pcl,soulsheng/pcl,pkuhto/pcl,nikste/pcl,stefanbuettner/pcl,ResByte/pcl,lydhr/pcl,fanxiaochen/mypcltest,stfuchs/pcl,the-glu/pcl,nh2/pcl,wgapl/pcl,drmateo/pcl,zavataafnan/pcl-truck,stfuchs/pcl,zavataafnan/pcl-truck,locnx1984/pcl,pkuhto/pcl,raydtang/pcl,shyamalschandra/pcl,ipa-rmb/pcl,krips89/pcl_newfeatures,LZRS/pcl,chenxingzhe/pcl,drmateo/pcl,shivmalhotra/pcl,wgapl/pcl,v4hn/pcl,stefanbuettner/pcl,mikhail-matrosov/pcl,3dtof/pcl,MMiknis/pcl,ipa-rmb/pcl,starius/pcl,msalvato/pcl_kinfu_highres,mikhail-matrosov/pcl,Tabjones/pcl,nikste/pcl,KevenRing/pcl,closerbibi/pcl,LZRS/pcl,Nerei/pcl_old_repo,DaikiMaekawa/pcl,stefanbuettner/pcl,jakobwilm/pcl,the-glu/pcl,shyamalschandra/pcl,simonleonard/pcl,3dtof/pcl,MMiknis/pcl,v4hn/pcl,simonleonard/pcl,lebronzhang/pcl,shangwuhencc/pcl,closerbibi/pcl,mschoeler/pcl,KevenRing/pcl,MMiknis/pcl,zavataafnan/pcl-truck,cascheberg/pcl,cascheberg/pcl,kanster/pcl,chenxingzhe/pcl,wgapl/pcl,drmateo/pcl,KevenRing/vlp,lebronzhang/pcl,Tabjones/pcl,lebronzhang/pcl,chatchavan/pcl,raydtang/pcl,jakobwilm/pcl,fskuka/pcl,stfuchs/pcl,shangwuhencc/pcl,fanxiaochen/mypcltest,the-glu/pcl,lydhr/pcl,jeppewalther/kinfu_segmentation,sbec/pcl,jeppewalther/kinfu_segmentation,shangwuhencc/pcl,zhangxaochen/pcl,ResByte/pcl,drmateo/pcl,sbec/pcl,jakobwilm/pcl,3dtof/pcl,fanxiaochen/mypcltest,sbec/pcl,chenxingzhe/pcl,shivmalhotra/pcl,shangwuhencc/pcl,locnx1984/pcl,starius/pcl,shyamalschandra/pcl,KevenRing/pcl,Tabjones/pcl,raydtang/pcl,mschoeler/pcl,KevenRing/vlp,3dtof/pcl,starius/pcl,stfuchs/pcl,srbhprajapati/pcl,v4hn/pcl,RufaelDev/pcc-mp3dg,damienjadeduff/pcl,the-glu/pcl,raydtang/pcl,simonleonard/pcl,RufaelDev/pcc-mp3dg,srbhprajapati/pcl,zavataafnan/pcl-truck,zhangxaochen/pcl,damienjadeduff/pcl,lydhr/pcl,zhangxaochen/pcl,lydhr/pcl,ipa-rmb/pcl,zavataafnan/pcl-truck,DaikiMaekawa/pcl,DaikiMaekawa/pcl,stefanbuettner/pcl,fanxiaochen/mypcltest,Nerei/pcl_old_repo,soulsheng/pcl,msalvato/pcl_kinfu_highres,pkuhto/pcl,cascheberg/pcl,mikhail-matrosov/pcl,closerbibi/pcl,Tabjones/pcl,chenxingzhe/pcl,starius/pcl,nikste/pcl,the-glu/pcl,mschoeler/pcl,KevenRing/pcl,closerbibi/pcl,msalvato/pcl_kinfu_highres,mikhail-matrosov/pcl,jeppewalther/kinfu_segmentation,Nerei/pcl_old_repo,shivmalhotra/pcl,KevenRing/vlp,chatchavan/pcl