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use scad

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This commit is contained in:
Justin Lin
2020-01-26 20:34:26 +08:00
parent be08328c32
commit 07d96b2e10
2 changed files with 31 additions and 27 deletions
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29
src/pixel/_impl/_px_gray_impl.scad Normal file
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@@ -0,0 +1,29 @@
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,
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] / nmal : (255 - row_bits[i]) / nmal
]
];
function _px_gray_impl(levels, center, invert, normalize) =
let(
width = len(levels[0]),
height = len(levels),
offset_i = height / 2
)
[
for(i = height - 1; i > -1; i = i - 1)
let(row = _px_gray_row(height - i - 1, levels[i], width, height, center, invert, normalize))
if(row != []) each row
];

29
src/pixel/px_gray.scad
View File

@@ -8,32 +8,7 @@
* *
**/ **/
function _px_gray_row(r_count, row_bits, width, height, center, invert, normalize) = use <pixel/_impl/_px_gray_impl.scad>;
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,
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] / nmal : (255 - row_bits[i]) / nmal
]
];
function px_gray(levels, center = false, invert = false, normalize = false) = function px_gray(levels, center = false, invert = false, normalize = false) =
let( _px_gray_impl(levels, center, invert, normalize);
width = len(levels[0]),
height = len(levels),
offset_i = height / 2
)
[
for(i = height - 1; i > -1; i = i - 1)
let(row = _px_gray_row(height - i - 1, levels[i], width, height, center, invert, normalize))
if(row != []) each row
];