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| author | clifford <clifford@b57f626f-c46c-0410-a088-ec61d464b74c> | 2010-01-22 14:28:17 (GMT) |
|---|---|---|
| committer | clifford <clifford@b57f626f-c46c-0410-a088-ec61d464b74c> | 2010-01-22 14:28:17 (GMT) |
| commit | 5d39aa71dda9181e55417b48e6ffafabb0eb25ff (patch) | |
| tree | dc29e02b19ee255a45ce99721d868fd7d5e712fb /examples/example020.scad | |
| parent | e0ca60eef76b2862d8fc14f785c0759566240ab8 (diff) | |
Clifford Wolf:
Added spring() to example20
Improved generated linear_extrude + twist 3d grid
git-svn-id: http://svn.clifford.at/openscad/trunk@336 b57f626f-c46c-0410-a088-ec61d464b74c
Diffstat (limited to 'examples/example020.scad')
| -rw-r--r-- | examples/example020.scad | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/examples/example020.scad b/examples/example020.scad index 8322939..e008f0b 100644 --- a/examples/example020.scad +++ b/examples/example020.scad @@ -32,8 +32,45 @@ module nut(type = 2, r1 = 16, r2 = 21, r3 = 30, s = 6, n = 7, h = 100/5, t = 8/5 } } +module spring(r1 = 100, r2 = 10, h = 100, hr = 12) +{ + stepsize = 1/16; + module segment(i1, i2) { + alpha1 = i1 * 360*r2/hr; + alpha2 = i2 * 360*r2/hr; + len1 = sin(acos(i1*2-1))*r2; + len2 = sin(acos(i2*2-1))*r2; + if (len1 < 0.01) + polygon([ + [ cos(alpha1)*r1, sin(alpha1)*r1 ], + [ cos(alpha2)*(r1-len2), sin(alpha2)*(r1-len2) ], + [ cos(alpha2)*(r1+len2), sin(alpha2)*(r1+len2) ] + ]); + if (len2 < 0.01) + polygon([ + [ cos(alpha1)*(r1+len1), sin(alpha1)*(r1+len1) ], + [ cos(alpha1)*(r1-len1), sin(alpha1)*(r1-len1) ], + [ cos(alpha2)*r1, sin(alpha2)*r1 ], + ]); + if (len1 >= 0.01 && len2 >= 0.01) + polygon([ + [ cos(alpha1)*(r1+len1), sin(alpha1)*(r1+len1) ], + [ cos(alpha1)*(r1-len1), sin(alpha1)*(r1-len1) ], + [ cos(alpha2)*(r1-len2), sin(alpha2)*(r1-len2) ], + [ cos(alpha2)*(r1+len2), sin(alpha2)*(r1+len2) ] + ]); + } + linear_extrude(height = 100, twist = 180*h/hr, + $fn = (hr/r2)/stepsize, convexity = 5) { + for (i = [ stepsize : stepsize : 1+stepsize/2 ]) + segment(i-stepsize, min(i, 1)); + } +} + translate([ -30, 0, 0 ]) screw(); translate([ 30, 0, 0 ]) nut(); + +spring(); |