openscad/dotSCAD
1
0
Fork 0
mirror of https://github.com/JustinSDK/dotSCAD.git synced 2025-08-06 14:56:47 +02:00
Code Issues Releases Wiki Activity

change levels format

Browse Source
This commit is contained in:
Justin Lin
2019-08-25 19:50:17 +08:00
parent 00f1b3a63d
commit 108450b029
1 changed files with 7 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
src/pixel/px_gray.scad
View File

@@ -3,34 +3,26 @@ function _px_gray_row(r_count, row_bits, width, height, center, invert) =
half_w = width / 2, half_w = width / 2,
half_h = height / 2, half_h = height / 2,
offset_x = center ? 0 : half_w, offset_x = center ? 0 : half_w,
offset_y = center ? 0 : half_h, offset_y = center ? -half_h : 0,
level = invert ? 0 : 255 level = invert ? 0 : 255
) )
[ [
for(i = 0; i < width; i = i + 1) for(i = 0; i < width; i = i + 1)
if(row_bits[i] != level) if(row_bits[i] != level)
[ [
i - half_w + offset_x, [i - half_w + offset_x, r_count + offset_y],
r_count + offset_y,
invert ? row_bits[i] / 255 : 1 - row_bits[i] / 255 invert ? row_bits[i] / 255 : 1 - row_bits[i] / 255
] ]
]; ];
function px_gray(levels, size, center = false, invert = false) = function px_gray(levels, center = false, invert = false) =
let( let(
squar = sqrt(len(levels)), width = len(levels[0]),
siz = is_undef(size) ? [squar, squar] : size, height = len(levels),
width = siz[0],
height = siz[1],
rows = [
for(row = height - 1; row > -1; row = row - 1)
[for(column = 0; column < width; column = column + 1)
levels[row * width + column]]
],
offset_i = height / 2 offset_i = height / 2
) )
[ [
for(i = 0; i < height; i = i + 1) for(i = height - 1; i > -1; i = i - 1)
let(row = _px_gray_row(i - offset_i, rows[i], width, height, center, invert)) let(row = _px_gray_row(height - i - 1, levels[i], width, height, center, invert))
if(row != []) each row if(row != []) each row
]; ];