Well, I have to add that the postscript is a full-featured programming language that uses stack and RPN notation, and stack to do everything. It has about the same age as C. A one year younger I think. The main features are STACK-based programming, integrated graphic processor, the whole program is interpreted, not compiled; easy to learn.
I use PS for generating many things, it has disk I/O too. The main advantage from user point of view is the unlimited substitution level and definition syntax. This allows you o create your very own expessions (the first you learn is how to define milimeter "mm" in your program writing.) On 1/12/07, Jack Coats <[EMAIL PROTECTED]> wrote: > First, I know I know not from where I speak, but please correct me: > > g-code - basically a tool path file. this I understand. > postscript - basically a page layout using vectors, and some shapes. > stl - a real 3D file that can be used to define solids but as triangles. > > I have been reading the REPRAP mail list, and they spent quite some > time in writing a program that will close the triangles from stl files > to make a solid contiguous set of lines. I think they mainly use AOI > to do their stuff. > > They have programs that then takes STL files and generates a > rasterized 'tool path' that then drives their '3-d lithographic' > process [yes, it is not real 3-D lithography, but it uses the same > thought process]. > > I am not sure how [EMAIL PROTECTED] does it, but they do roughtly the same > thing as REPRAP.org > > Please point out where I am all wet? > > Quoting Stephen Wille Padnos <[EMAIL PROTECTED]>: > > > Hi there. > > > > I think STL is fine for a lot of work, but it really isn't the best > > solution. STL is a "rasterized" file format, which contains only > > "blocky" shape information. This is as opposed to a vector format, > > which may be scaled or, in the case of machining, can be cut with the > > precision of the machine. This is like the difference between PhotoShop > > and Corel Draw. If I rasterize something for my crappy 9-pin Panasonic > > dot-matrix printer and email that to you, you can't get any better > > resolution with your whiz-bang 2400DPI Linotype. If I send you a file > > that says "draw a line from 1,1 to 2,2", then you'll get much better > > results on the Linotype. > > > > STL works, and I use it, but it's not ideal. G-code is better for > > describing machining geometry, but also suffers because it doesn't have > > the shape information. (it has paths but not shape, STL has shape but > > not paths, and is raster) > > > > At this point, I don't think there's a perfect solution. > > - Steve > > > > Roland Jollivet wrote: > > > >> Hi, just a comment.. > >> > >> I get the impression that in industry .stl files are dismissed as 'for > >> prototyping' . > >> When I worked on a small cnc mill, however, .stl files were the easiest > to > >> generate and move between programs. Also, for cutting fine detail on > small > >> parts, I was using a 1mm bit with a 10u stepover. Repeatedly, the > machining > >> scallop marks were visible before the 'triangles' were. > >> Admittedly, .stl files are a bit large compared to .iges, but who cares, > >> we're not limited to 640K anymore.(sarcasm) > >> > >> So I think .stl are perfect for machining with. Any comments? > >> > >> Regards > >> Roland Jollivet > >> > >> ------------------------------------------------------------------------- > >> Take Surveys. Earn Cash. 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