I only had time to play a bit with the new bpp, and just toyed a bit with the old samples: everything seems to work fine except for my car simulations, which are behaving very different and badly.
I'm currently fixing the POV-Ray mesh2 export..
BTW, openscad seems to not be working for me... when I load your demos I only get the plane. Should I install something for the openscad support?
http://www.openscad.org/ - a "$ sudo apt-get -y install openscad" should fix this.
it's a runtime dependency in BPP.
About the mesh instancing, yes, it should be done that way. But I guess this could be done only if bpp allowed mesh instancing itself (it does? I don't remember).
mesh instancing is not implemented yet. I need to think a bit howto do this in a correct way.
can you point me to the source code of other programs, that do mesh instancing?
Can you give a try to this basic example ? - https://github.com/bullet-physics-playground/bpp/blob/master/demo/00-hello.lua
openscad rendering should be creating the mesh within fractions of seconds.
the gui should not freeze, if you open 00-hello.lua (the version I updated a few minutes ago.)
they have a google summer of code project, where they are trying to do the cgal calculations in a multithreaded manner.
in bpp, once the openscad stl is calculated it gets cached in ~/.cache/*.stl ..
in openscad there's the $fn variable that controls the number of facetes that get calculated: https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/The_OpenSCAD_Language#.24fa.2C_.24fs_and_.24fn try reduce these and the openscad calculations get quicker.
$ time bash -c 'echo "cube([2,3,4]);" > /tmp/bpp.scad && openscad -o /tmp/bpp.stl /tmp/bpp.scad'
real 0m0.036s
user 0m0.016s
sys 0m0.004s
real 0m0.176s
user 0m0.118s
sys 0m0.054s
user 0m0.118s
sys 0m0.054s
(On Thinkpad x220)
This is an AMD PhenomX6
On my Thinkpad X200:
koppi@x200:~$ time bash -c 'echo "cube([2,3,4]);" > /tmp/bpp.scad && openscad -o /tmp/bpp.stl /tmp/bpp.scad'
real 0m0.067s
user 0m0.028s
sys 0m0.000s
koppi@x200:~$ openscad -v
OpenSCAD version 2014.03
koppi@x200:~$ uname -a
Linux x200 3.8-1-xenomai.x86-amd64 #1 SMP Debian 3.8.13-12~1jessie~1da x86_64 GNU/Linux
koppi@x200:~$
On my Thinkpad X220:
koppi@x220:~$ time bash -c 'echo "cube([2,3,4]);" > /tmp/bpp.scad && openscad -o /tmp/bpp.stl /tmp/bpp.scad'
real 0m0.014s
user 0m0.012s
sys 0m0.000s
koppi@x220:~$ openscad -v
OpenSCAD version 2015.03-1
koppi@x220:~$ uname -a
Linux x220 4.4.0-17-generic #33-Ubuntu SMP Tue Mar 29 17:17:28 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
koppi@x220:~$time bash -c 'echo "cube([2,3,4]);" > /tmp/bpp.scad && openscad -o /tmp/bpp.stl /tmp/bpp.scad'
CGAL Cache insert: cube(size=[2,3,4],center=false); (10872 bytes)
CGAL Cache insert: group(){cube(size=[2,3,4],center=false); (10872 bytes)
real 0m0.164s
user 0m0.112s
sys 0m0.048s
Obviously, there is something wrong with openscad on ubuntu 14.04, my system shouldn't be that slow.
01-openscad-spirals.lua was taking 45 seconds before, now under 1 sec. ;)