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Code Issues Releases Wiki Activity

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This commit is contained in:
Justin Lin
2020-03-24 13:18:44 +08:00
parent 5c37382c26
commit d594fbf801
5 changed files with 13 additions and 17 deletions
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16
examples/image_slicer.scad
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@@ -1,5 +1,5 @@
use <hull_polyline2d.scad>;
use <experimental/marching_squares.scad>;
use <experimental/contours.scad>;
level_step = 51;
contour_width = 1.5;
@@ -116,18 +116,14 @@ module image_slicer(levels, level_step, contour_width) {
max_h = (floor(255 / level_step) + 1) * level_step;
module contours(points, z, contour_width) {
union() {
for(iso_band = marching_squares(points, [0, z])) {
polygon([for(p = iso_band) [p[0], p[1]]]);
}
}
}
for(z = [level_step:level_step:255]) {
linear_extrude((max_h - z) / level_step)
offset(0.01) // Avoid warning
contours(points, z, contour_width);
union() {
for(iso_band = contours(points, [0, z])) {
polygon([for(p = iso_band) [p[0], p[1]]]);
}
}
}
}

0
src/experimental/_impl/_marching_squares_impl.scad → src/experimental/_impl/_contours_impl.scad
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4
src/experimental/marching_squares.scad → src/experimental/contours.scad
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@@ -1,6 +1,6 @@
use <experimental/_impl/_marching_squares_impl.scad>;
use <experimental/_impl/_contours_impl.scad>;
function marching_squares(points, threshold) =
function contours(points, threshold) =
is_undef(threshold[1]) ?
_marching_squares_isolines(points, threshold) :
_marching_squares_isobands(points, threshold[0], threshold[1]);

6
src/experimental/demo/marching_squares_demo.scad → src/experimental/demo/contours_demo.scad
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@@ -1,7 +1,7 @@
use <hull_polyline2d.scad>;
use <util/rand.scad>;
use <experimental/pnoise2.scad>;
use <experimental/marching_squares.scad>;
use <experimental/contours.scad>;
seed = rand(0, 256);
points = [
@@ -11,11 +11,11 @@ points = [
];
for(isoline = marching_squares(points, 0.1)) {
for(isoline = contours(points, 0.1)) {
hull_polyline2d(isoline, width = .1);
}
translate([12, 0])
for(isoband = marching_squares(points, [-.2, .2])) {
for(isoband = contours(points, [-.2, .2])) {
polygon([for(p = isoband) [p[0], p[1]]]);
}

4
src/experimental/demo/marching_squares_demo2.scad → src/experimental/demo/contours_demo2.scad
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@@ -1,5 +1,5 @@
use <hull_polyline2d.scad>;
use <experimental/marching_squares.scad>;
use <experimental/contours.scad>;
levels = [
[255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255],
@@ -111,7 +111,7 @@ points = [
];
for(z = [0:40:255]) {
for(isoline = marching_squares(points, z)) {
for(isoline = contours(points, z)) {
hull_polyline2d(isoline, width = .25);
}
}