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start accept a list of points
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@@ -1,17 +1,27 @@
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use <../../matrix/m_replace.scad>
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use <../../matrix/m_replace.scad>
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use <../../util/every.scad>
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use <../../util/every.scad>
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use <../../util/find_index.scad>
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function sampling(size, r, start, k, sd) =
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function sampling(size, r, start, k, sd) =
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let(
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let(
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w = r / sqrt(2),
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w = r / sqrt(2),
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rows = floor(size.y / w),
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rows = floor(size.y / w),
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columns = floor(size.x / w),
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columns = floor(size.x / w),
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pt = is_undef(start) ? [rands(0, size.x, 1, sd)[0], rands(0, size.y, 1, sd + 1)[0]] : start,
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pts = is_undef(start) ? [[rands(0, size.x, 1, sd)[0], rands(0, size.y, 1, sd + 1)[0]]] :
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active = [pt],
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is_num(start[0]) ? [start] : start,
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px = floor(pt.x / w),
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active = pts,
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py = floor(pt.y / w),
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pij = [for(pt = pts) [floor(pt.x / w), floor(pt.y / w), pt]],
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grid_row = [for(i = [0:columns - 1]) undef],
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grid = [
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grid = m_replace([for(j = [0:rows - 1]) grid_row], px, py, pt)
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for(j = [0:rows - 1])
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[
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for(i = [0:columns - 1])
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let(found = find_index(pij, function(ij) ij[0] == i && ij[1] == j))
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if(found != -1)
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found[2]
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else
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undef
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]
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]
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)
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)
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[r, k, w, active, grid, rows, columns, []];
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[r, k, w, active, grid, rows, columns, []];
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