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Added pie_slice()

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Revar Desmera 2018-12-22 13:17:04 -08:00
parent 5e4ab8e649
commit f6a7a1273c
1 changed files with 29 additions and 1 deletions
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30
shapes.scad
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@ -482,6 +482,34 @@ module torus(or=1, ir=0.5, od=undef, id=undef, r=undef, r2=undef, d=undef, d2=un
}
// Creates a pie slice shape.
// ang = pie slice angle in degrees.
// h = height of pie slice.
// r = radius of pie slice.
// r1 = bottom radius of pie slice.
// r2 = top radius of pie slice.
// d = diameter of pie slice.
// d1 = bottom diameter of pie slice.
// d2 = top diameter of pie slice.
// center = if true, centers pie slice vertically. Default: false
// Example:
// pie_slice(ang=45, h=30, r1=100, r2=80);
module pie_slice(ang=30, h=1, r=10, r1=undef, r2=undef, d=undef, d1=undef, d2=undef, center=false)
{
r1 = r1!=undef? r1 : (d1!=undef? d1/2 : (d!=undef? d/2 : r));
r2 = r2!=undef? r2 : (d2!=undef? d2/2 : (d!=undef? d/2 : r));
steps = ceil(segs(max(r1,r2))*ang/360);
step = ang/steps;
pts = concat(
[[0,0]],
[for (i=[0:steps]) let(a = i*step) [r1*cos(a), r1*sin(a)]]
);
linear_extrude(height=h, scale=r2/r1, center=center, convexity=2) {
polygon(pts);
}
}
// Makes a linear slot with rounded ends, appropriate for bolts to slide along.
// p1 = center of starting circle of slot. (Default: [0,0,0])
// p2 = center of ending circle of slot. (Default: [1,0,0])
@ -720,7 +748,7 @@ module thinning_wall(h=50, l=100, thick=5, ang=30, strut=5, wall=2)
[ 2, 15, 14],
[ 3, 12, 15],
],
convexity=2
convexity=6
);
}
}