I'm using Ubuntu 16.04 and the version from the PPA is 2015.03, which barfs on my list comprehensions (and tells me the wrong line number when using include) so I want to use a later one. On my Windows machine I use the nightly 2017.04.05 (git d22fa32) , which works fine. My Linux machine has 2017.06.03.nightly , which also work but I get awful results with preview when objects are sliced on various planes. If my viewing point moves to the other side of the plane, I see the wrong bit of the object! Is this likely to be down to the version of OpenSCAD or the version of OpenCGS? Googling suggested some driver bugs were worked around in OpenCSG 1.4.1 (I'm on 1.4.0) but these were for Intel and I'm using AMD Radeon. I'm really not sure what to try changing, where to get a newer OpenCSG, or anything else I can fiddle with (I tried forcing GoldFeather.) BTW, here is the list comprehension that fails. Am I relying on unsupported syntax? EngineWidths= [ for (a = [0: $fa: 90]) [ (1-cos(a))*EngineR3, EngineFrontWidth - (1-sin(a))*EngineR3] , [EngineBandX1, EngineMaxWidth], [EngineBandX2, EngineMaxWidth], for (a = [0: 1: 90]) [ EngineLength -EngineR5 + sin(a)*EngineR5, EngineRearWidth - (1-cos(a))*EngineR5] ];

for me (on Void Linux) I've had no problems compiling from github sources, seems to work just fine! void linux packages version 1.4.2_1 of openSCG which I used to compile OpenSCAD with, while I have had the odd assert error with openSCG but not enough of a show stopper to make me think it would be worth compiling openSCG too. I'd welcome OpenSCAD making a file release from current git every few months, the years old version is the one that usually gets packaged and it shows OpenSCAD in a not particularly good light... On 17/07/17 12:47, Ian Oliver wrote: > I'm using Ubuntu 16.04 and the version from the PPA is 2015.03, which > barfs on my list comprehensions (and tells me the wrong line number > when using include) so I want to use a later one. > > On my Windows machine I use the nightly 2017.04.05 (git d22fa32) , > which works fine. > > My Linux machine has 2017.06.03.nightly , which also work but I get > awful results with preview when objects are sliced on various planes. > If my viewing point moves to the other side of the plane, I see the > wrong bit of the object! > > Is this likely to be down to the version of OpenSCAD or the version of > OpenCGS? Googling suggested some driver bugs were worked around in > OpenCSG 1.4.1 (I'm on 1.4.0) but these were for Intel and I'm using > AMD Radeon. > > I'm really not sure what to try changing, where to get a newer > OpenCSG, or anything else I can fiddle with (I tried forcing > GoldFeather.) > > BTW, here is the list comprehension that fails. Am I relying on > unsupported syntax? > > EngineWidths= [ > for (a = [0: $fa: 90]) [ (1-cos(a))*EngineR3, EngineFrontWidth - > (1-sin(a))*EngineR3] , > [EngineBandX1, EngineMaxWidth], > [EngineBandX2, EngineMaxWidth], > for (a = [0: 1: 90]) [ EngineLength -EngineR5 + sin(a)*EngineR5, > EngineRearWidth - (1-cos(a))*EngineR5] > ]; > > > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org