#Openscad wedge how to

but, it's not there as of today, as far as I know.īy the way, I'm not a math background guy. This could all be implemented given today's OpenScad, as a module, or become an inbuilt fairly easily. Extrude by 12, twist 30 degrees along the way, and shrink down to a point. Just match the points up.Įxtrude(starting, height=12, shrink=100, twist=30)Ī single set of points, using the polyloop function. You would have to specify the same number of points for each curve, or use the smallest number of points, but it could be done. In this case, the function would be 'polyloop'. This could be added fairly easily as a library, or as an inbuilt function. That could be a pretty straight forward way to do things. That would give you an extrusion with a base in the shape of a square, and a top in the shape of a circle. Note: not exact syntax, but you should get the general idea. Starting = ] // A square with rounded cornersĮnding = ] // A circle So, in the case of using a superellipse, for example, as the driving profile, you could do something like: For example, you could specify a limited set of functions, and internally extrude() could map. There are ways of getting around this in fairly limited cases. This would require functions be passed as parameters. Startprofile - a function defining what the base looks likeĮndprofile - a function defining what the end looks like

I think a parametric representation would be easiestĮxtrude(startprofile, endprofile, height) Twist_degrees - how much to twist as you go up Percent_shrink - How much to shrink the thing as you go up Taper_extrude(basepts, height, percent_shrink, twist_degrees) What would be the ideal form of expressing this? * wedges ( yes, I know, those can normal be made by subtraction, as they are just intersecting rectangles, but what if the wedge was a unique 2D profiled polygon? ) * heels for high-heeled shoes ( typically a funny 'D' shape, and taper down to the ground ) * potplant bases (not the round ones, the square or rectangular based ones, with tapered walls ) * non-circular ducting or piping that needs to keep its profile, but shrink/grow in size ( eg square overhead airconditioning ducting ) * airfoils, wings, propellors, where the basic 2D shape is a 2D airfoil, but the extruded length can taper and/or twist. * wood-screws, and other tapered+threaded devices I see this generic method would be useful for ( here's a few examples): :-) Before you ignore this as a 'feature request without patch', please consider at least pointing me in the right directio.

#Openscad wedge how to

however, I'm looking for a way to extrude arbitrary 2D shapes in a similar manner, and I can't figure it out.Īnyway, I guess I'm either after someone telling me how to do this in openscad, or if it's not possible, then this is a feature request. I know the openscad 'cylinder' object can make cones ( and truncated conical shapes ). The simplest form of this would be a cone, which is a 2D circle extruded vertically ( for a distance that is the height of the cone), and is extruded down to a 'point' that is 0% of the dimensions of the original circle. I assume there's got to be a way, but it escapes me.īy 'tapered extrusion' I mean something akin to linear_extrusion(), but in which the 2D profile gradually gets smaller as it extrudes further.

I've been searching/googleing, and I'm unable to figure out how to do a 'tapered extrusion' in openscad.