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Changed list_range(s,e,n) to auto-set step to (e-s)/(n-1).
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math.scad

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -600,15 +600,15 @@ function array_subindex(v, idx) = [
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// list_range(4); // Returns [0,1,2,3]
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// list_range(n=4, step=2); // Returns [0,2,4,6]
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// list_range(n=4, s=3, step=3); // Returns [3,6,9,12]
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// list_range(n=4, s=3, e=9, step=3); // Returns [3,6,9]
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// list_range(n=5, s=0, e=10); // Returns [0, 2.5, 5, 7.5, 10]
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// list_range(e=3); // Returns [0,1,2,3]
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// list_range(e=6, step=2); // Returns [0,2,4,6]
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// list_range(s=3, e=5); // Returns [3,4,5]
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// list_range(s=3, e=8, step=2); // Returns [3,5,7]
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// list_range(s=4, e=8, step=2); // Returns [4,6,8]
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// list_range(n=4, s=[3,4], step=[2,3]); // Returns [[3,4], [5,7], [7,10], [9,13]]
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function list_range(n=undef, s=0, e=undef, step=1) =
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(n!=undef && e!=undef)? [for (i=[0:n-1]) let(v=s+step*i) if (v<=e) v] :
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(n!=undef && e!=undef)? [for (i=[0:1:n-1]) s+(e-s)*i/(n-1)] :
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(n!=undef)? [for (i=[0:n-1]) let(v=s+step*i) v] :
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(e!=undef)? [for (v=[s:step:e]) v] :
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assertion(false, "Must supply one of `n` or `e`.");

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