To be closer to a perfect flat bar, you would need to x-rotate (or possibly y-rotate) the cube() by the value of angle in module spiral_points().

(elevation)], [0, sin(elevation), cos(elevation)]] *                [[cos(angle), -sin(angle), 0], [sin(angle), cos(angle), 0], [0, 0, 1]] *                p        )        [            rotated[0] + center[0],            rotated[1] + center[1],            rotated[2] + center[2]        ]    ]; // Create the main spiralmodule spiral() {    points = spiral_points

. // Map a polar coordinate [rho, theta, phi] onto Cartesian [x,y,z] function toRect3(p) = [ p[0] * cos(p[1]) * sin(p[2]), p[0] * sin(p[1]) * sin(p[2]), p[0] * cos(p[2]) ]; // Map array a onto a sphere of radius r, using equirectangular projection. // https://en.wikipedia.org/wiki/Equirectangular_projection // // a is an array of offsets from the

How can I then remove the X-Y plane surfaces of the union. I would like to avoid inputting the points with their coordinates directly to reduce overhead calculations and maintain things parametric. So if you know the magic trick, I would really appreciate it! Best regards, Hisham

. >> No replica at fc-f.

Peter, Brent and all, In the swimming pool trade there are valves which are "T" shaped rather than "Y" shaped, but they accomplish the same thing. They are heavily constructed out of PVC and are available with permanently lubed seals and o-rings. The most common are 1-1/2" inside and 2" outside although larger sizes are available.

Like: rotate (-90, [0,1,0]) linear_extrude(5){ difference(){ translate([0,1,0]) square([4,10]); translate([0,2,10]) square([3,8]); }//d }//LE -- View this message in context: http://forum.openscad.org/Is-it-possible-to-make-a-linear-extrude-in-the-direction-of-Y-axis-tp20221p20223.html Sent from the OpenSCAD

Milford, Anderson Ave Marsh - male BLUE-WINGED TEAL at dusk Stratford, Long Beach Blve, Railroad Trail - male BOAT-TAILED GRACKLE, 1 WILSON'S SNIPE earlier in afternoon Y-h Blackbird pics, incl one singing:  http://picasaweb.google.com/TimAntanaitis/NewEnglandBirds#5324727165986596370 Great day of birding after not birding for a while. 

a) * theta_scale / sin(helix_a)]) >> ]; >> >> // Banana, algorithm B >> bananaB = function() [ >> for (a=[0:359]) >> let(circ = torect2([r, a])) // circle >> let(tcirc = circ + [helix_r, 0]) // translated >> let(pcirc = topolar2(tcirc)) // in polar coords >> let(smeared_circ = [pcirc[0], pcirc[1]/sin(helix_a

scaramouche@tvo.org writes: >Another way to overcome this would be to use individual plugs, a >female 30, a male 20 and a male15 and wire them in a sort-of 'Y' >configuration with 12 and 14 gauge. CAUTION This would of course necessitate insulating the unused male plug as you otherwise would have a real good shock hazard.