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add normalize parameter

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This commit is contained in:
Justin Lin 2019-08-26 08:05:49 +08:00
parent d692f700f7
commit a226e0a625
1 changed files with 6 additions and 5 deletions
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11
src/pixel/px_gray.scad
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@ -1,21 +1,22 @@
function _px_gray_row(r_count, row_bits, width, height, center, invert) =
function _px_gray_row(r_count, row_bits, width, height, center, invert, normalize) =
let(
half_w = width / 2,
half_h = height / 2,
offset_x = center ? 0 : half_w,
offset_y = center ? -half_h : 0,
level = invert ? 0 : 255
level = invert ? 0 : 255,
nmal = normalize ? 255 : 1
)
[
for(i = 0; i < width; i = i + 1)
if(row_bits[i] != level)
[
[i - half_w + offset_x, r_count + offset_y],
invert ? row_bits[i] / 255 : 1 - row_bits[i] / 255
invert ? row_bits[i] / nmal : (255 - row_bits[i]) / nmal
]
];
function px_gray(levels, center = false, invert = false) =
function px_gray(levels, center = false, invert = false, normalize = true) =
let(
width = len(levels[0]),
height = len(levels),
@ -23,6 +24,6 @@ function px_gray(levels, center = false, invert = false) =
)
[
for(i = height - 1; i > -1; i = i - 1)
let(row = _px_gray_row(height - i - 1, levels[i], width, height, center, invert))
let(row = _px_gray_row(height - i - 1, levels[i], width, height, center, invert, normalize))
if(row != []) each row
];