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size is not necessary

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Justin Lin
2019-08-25 17:56:34 +08:00
parent 1af801f54a
commit 6c570ef757
1 changed files with 6 additions and 13 deletions
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19
src/pixel/px_from.scad
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@@ -13,26 +13,19 @@ function _px_from_row(r_count, row_bits, width, height, center, invert) =
half_w = width / 2,
half_h = height / 2,
offset_x = center ? 0 : half_w,
offset_y = center ? 0 : half_h,
offset_y = center ? -half_h : 0,
bit = invert ? 0 : 1
)
[for(i = 0; i < width; i = i + 1) if(row_bits[i] == bit) [i - half_w + offset_x, r_count + offset_y]];
function px_from(binaries, size, center = false, invert = false) =
function px_from(binaries, center = false, invert = false) =
let(
squar = sqrt(len(binaries)),
siz = is_undef(size) ? [squar, squar] : size,
width = siz[0],
height = siz[1],
rows = [
for(row = height - 1; row > -1; row = row - 1)
[for(column = 0; column < width; column = column + 1)
binaries[row * width + column]]
],
width = len(binaries[0]),
height = len(binaries),
offset_i = height / 2
)
[
for(i = 0; i < height; i = i + 1)
let(row = _px_from_row(i - offset_i, rows[i], width, height, center, invert))
for(i = height - 1; i > 0; i = i - 1)
let(row = _px_from_row(height - i - 1, binaries[i], width, height, center, invert))
if(row != []) each row
];