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Code Issues Releases Wiki Activity

use scad

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This commit is contained in:
Justin Lin
2020-01-26 18:05:27 +08:00
parent e2e6b9437c
commit 10a6727215
3 changed files with 58 additions and 55 deletions
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54
src/pixel/_impl/_px_circle_impl.scad Normal file
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@@ -0,0 +1,54 @@
function _px_circle_y(f, y) = f >= 0 ? y - 1 : y;
function _px_circle_ddf_y(f, ddf_y) = f >= 0 ? ddf_y + 2 : ddf_y;
function _px_circle_f(f, ddf_y) = f >= 0 ? f + ddf_y : f;
function _px_circle(f, ddf_x, ddf_y, x, y, filled) =
x >= y ? [] :
let(
ny = _px_circle_y(f, y),
nddf_y = _px_circle_ddf_y(f, ddf_y),
nx = x + 1,
nddf_x = ddf_x + 2,
nf = _px_circle_f(f, ddf_y) + nddf_x
)
concat(
filled ?
concat(
[for(xi = -nx; xi <= nx; xi = xi + 1) [xi, -ny]],
[for(xi = -ny; xi <= ny; xi = xi + 1) [xi, -nx]],
[for(xi = -ny; xi <= ny; xi = xi + 1) [xi, nx]],
[for(xi = -nx; xi <= nx; xi = xi + 1) [xi, ny]]
)
:
[
[-nx, -ny], [nx, -ny],
[-ny, -nx], [ny, -nx],
[-ny, nx], [ny, nx],
[-nx, ny], [nx, ny]
],
_px_circle(nf, nddf_x, nddf_y, nx, ny, filled)
);
function _px_circle_impl(radius, filled) =
let(
f = 1 - radius,
ddf_x = 1,
ddf_y = -2 * radius,
x = 0,
y = radius
)
concat(
filled ?
concat(
[[0, radius], [0, -radius]],
[for(xi = -radius; xi <= radius; xi = xi + 1) [xi, 0]]
)
:
[
[0, -radius],
[-radius, 0],
[radius, 0],
[0, radius]
],
_px_circle(f, ddf_x, ddf_y, x, y, filled)
);

55
src/pixel/px_circle.scad
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@@ -8,57 +8,6 @@
*
**/
function _px_circle_y(f, y) = f >= 0 ? y - 1 : y;
function _px_circle_ddf_y(f, ddf_y) = f >= 0 ? ddf_y + 2 : ddf_y;
function _px_circle_f(f, ddf_y) = f >= 0 ? f + ddf_y : f;
use <pixel/_impl/_px_circle_impl.scad>;
function _px_circle(f, ddf_x, ddf_y, x, y, filled) =
x >= y ? [] :
let(
ny = _px_circle_y(f, y),
nddf_y = _px_circle_ddf_y(f, ddf_y),
nx = x + 1,
nddf_x = ddf_x + 2,
nf = _px_circle_f(f, ddf_y) + nddf_x
)
concat(
filled ?
concat(
[for(xi = -nx; xi <= nx; xi = xi + 1) [xi, -ny]],
[for(xi = -ny; xi <= ny; xi = xi + 1) [xi, -nx]],
[for(xi = -ny; xi <= ny; xi = xi + 1) [xi, nx]],
[for(xi = -nx; xi <= nx; xi = xi + 1) [xi, ny]]
)
:
[
[-nx, -ny], [nx, -ny],
[-ny, -nx], [ny, -nx],
[-ny, nx], [ny, nx],
[-nx, ny], [nx, ny]
],
_px_circle(nf, nddf_x, nddf_y, nx, ny, filled)
);
function px_circle(radius, filled = false) =
let(
f = 1 - radius,
ddf_x = 1,
ddf_y = -2 * radius,
x = 0,
y = radius
)
concat(
filled ?
concat(
[[0, radius], [0, -radius]],
[for(xi = -radius; xi <= radius; xi = xi + 1) [xi, 0]]
)
:
[
[0, -radius],
[-radius, 0],
[radius, 0],
[0, radius]
],
_px_circle(f, ddf_x, ddf_y, x, y, filled)
);
function px_circle(radius, filled = false) = _px_circle_impl(radius, filled);

4
test/pixel/test_px_circle.scad
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@@ -1,5 +1,5 @@
include <unittest.scad>;
include <pixel/px_circle.scad>;
use <unittest.scad>;
use <pixel/px_circle.scad>;
module test_px_circle() {
echo("==== test_px_circle ====");