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Thank you for your elaborate reply. My my view is probably way too simplistic, but I'm really wondering how you would end up with quadratic terms if you need t

by toong 12y ago

Thank you for your elaborate reply. My my view is probably way too simplistic, but I'm really wondering how you would end up with quadratic terms if you need to define stuff like: * this line needs to be 1/3 the length of that line * these set of lines should start 50mm left of this line I can see how trigonometric expressions could be useful to specify angles (although a constant there covers 99% of the user-cases?).

colah3 12y ago
> * this line needs to be 1/3 the length of that line > * these set of lines should start 50mm left of this line Remember that you're working with points. So, to express the length of a line, you need something like (x1-x2)^2 + (y1-y2)^2 . If you just wanted to do things like "this point is +(0,10) of this other one", you're doing a really simple constructive system, which is easy to evaluate, but not anywhere near as flexible or powerful. ImplicitCAD/OpenSCAD trivially do that, just without a nice interface.