29 lines
1.8 KiB
OpenSCAD
29 lines
1.8 KiB
OpenSCAD
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// From http://www.thingiverse.com/thing:3457
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// © 2010 whosawhatsis
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/*
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This script generates a teardrop shape at the appropriate angle to prevent overhangs greater than 45 degrees. The angle is in degrees, and is a rotation around the Y axis. You can then rotate around Z to point it in any direction. Rotation around Y or Z will cause the angle to be wrong.
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*/
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module teardrop(radius, length, angle) {
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rotate([0, angle, 0]) union() {
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linear_extrude(height = length, center = true, convexity = radius, twist = 0)
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circle(r = radius, center = true, $fn = 30);
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linear_extrude(height = length, center = true, convexity = radius, twist = 0)
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projection(cut = false) rotate([0, -angle, 0]) translate([0, 0, radius * sin(45) * 1.5]) cylinder(h = radius * sin(45), r1 = radius * sin(45), r2 = 0, center = true, $fn = 30);
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}
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//I worked this portion out when a bug was causing the projection above to take FOREVER to calculate. It works as a replacement, and I figured I'd leave it here just in case.
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/*
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#polygon(points = [[radius * cos(-angle / 2), radius * sin(-angle / 2), 0],[radius * cos(-angle / 2), radius * -sin(-angle / 2), 0],[(sin(-angle - 45) + cos(-angle - 45)) * radius, 0, 0]], paths = [[0, 1, 2]]);
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#polygon(points = [[radius * -cos(-angle / 2), radius * sin(-angle / 2), 0],[radius * -cos(-angle / 2), radius * -sin(-angle / 2), 0],[(sin(-angle - 45) + cos(-angle - 45)) * radius, 0, 0]], paths = [[0, 1, 2]]);
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#polygon(points = [[radius * sin(-angle / 2), radius * cos(-angle / 2), 0],[radius * sin(-angle / 2), radius * -cos(-angle / 2), 0],[(sin(-angle - 45) + cos(-angle - 45)) * radius, 0, 0]], paths = [[0, 1, 2]]);
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*/
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}
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module test_teardrop(){
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translate([0, -15, 0]) teardrop(5, 20, 90);
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translate([0, 0, 0]) teardrop(5, 20, 60);
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translate([0, 15, 0]) teardrop(5, 20, 45);
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}
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