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45 lines
1.2 KiB
Markdown
45 lines
1.2 KiB
Markdown
# dedup
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Eliminating duplicate copies of repeating vectors. If `lt` has a large number of elements, sorting `lt` first and setting `sorted` to `true` will be faster.
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**Since:** 2.3
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## Parameters
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- `lt` : A list of vectors.
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- `sorted` : If `false` (default), use native `search`. If `true`, `lt` must be sorted by zyx (from the last index to the first one) and `dedup` will use binary search internally.
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## Examples
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use <pixel/px_circle.scad>;
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use <util/dedup.scad>;
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pts1 = px_circle(10, filled = true);
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pts2 = [for(p = px_circle(5, filled = true)) p + [10, 0]];
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// simple union
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pts3 = dedup(concat(pts1, pts2));
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for(p = pts3) {
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translate(p)
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square(1, center = true);
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}
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use <pixel/px_circle.scad>;
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use <util/sort.scad>;
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use <util/dedup.scad>;
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pts1 = px_circle(20, filled = true);
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pts2 = [for(p = px_circle(10, filled = true)) p + [20, 0]];
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sorted_pts = sort(concat(pts1, pts2), by = "vt");
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// simple union
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pts3 = dedup(sorted_pts, sorted = true);
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for(p = pts3) {
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translate(p)
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square(1, center = true);
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}
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