Path: csiph.com!weretis.net!feeder6.news.weretis.net!feeder7.news.weretis.net!news.szaf.org!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: Richard Ashbery Newsgroups: comp.sys.acorn.programmer Subject: Re: Rotating a Colour-Filled Square Date: Fri, 15 Nov 2019 13:35:37 +0000 (GMT) Organization: None Lines: 22 Message-ID: <581353b019basura@invalid.addr.uk> References: <5811cae024basura@invalid.addr.uk> <58124834ffbasura@invalid.addr.uk> <58125f40fdbasura@invalid.addr.uk> X-Trace: individual.net rYpgZSFcff9fTHi5F2eX1AleTpQAGXGFN7VoM6TcT0E5K0cx51 X-Orig-Path: uwclub.net!richard.ashbery Cancel-Lock: sha1:Z6LSm1vm6jwx8D9ZSiVllQLDano= User-Agent: Pluto/3.16 (RISC OS/5.25) NewsHound/v1.52-32 Xref: csiph.com comp.sys.acorn.programmer:5872 In article , druck wrote: > On 13/11/2019 23:35, Sebastian Barthel wrote: > > This doesn't seems as easy as it should be ... I tried it with > > the biggest square plotted first. Then the second on top of it. > > But, from this second square on to the last and most little > > square the FILL command didn't work anymore in the expected way. > > I think, the FILL will only fill if there is an unpainted > > background colour. It doesn't work on top of an already painted > > structure. > Don't use Fill, even when it works its very slow. You are after > rotated squares, so just draw them as two triangles with PLOT 85 - > vastly faster, and no worries about what is underneath. As Sebastian pointed out the FILL command appears to do odd things. I hadn't realised that it also throttles speed. I'll look at the triangle fill command as you suggest. There is a huge list of PLOT commands - it seems only a few are really useful. Richard