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add multi value threshold in gyroid

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This commit is contained in:
Stewart Allen 2020-05-06 21:43:09 -04:00
commit 9d092ad3fe
2 changed files with 11 additions and 5 deletions
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14
js/geo-gyroid.js
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@ -16,11 +16,11 @@ var gs_base_gyroid = exports;
* @param off {number} z offset value from 0-1
* @param res {number} resolution (pixels/slices per side)
*/
function slice(off, res) {
function slice(off, res, val) {
let rez = parseInt(res || 200);
let inc = PI2 / rez;
let z = PI2 * off;
let tip = val || 0;
let edge = [];
let vals = [];
let points = 0;
@ -46,7 +46,10 @@ var gs_base_gyroid = exports;
let erow = edge[y];
let lval = vrow[vrow.length - 1];
vrow.forEach((val, x) => {
if ((lval <= 0 && val >= 0) || (lval >= 0 && val <= 0)) {
if (
(lval <= tip && val >= tip) || (lval >= tip && val <= tip) ||
(lval <= -tip && val >= -tip) || (lval >= -tip && val <= -tip)
) {
erow[x] = 1;
points++;
points_lr++;
@ -60,7 +63,10 @@ var gs_base_gyroid = exports;
let lval = vals[vals.length-1][x];
for (let y=0; y<rez; y++) {
let val = vals[y][x];
if ((lval <= 0 && val >= 0) || (lval >= 0 && val <= 0)) {
if (
(lval <= tip && val >= tip) || (lval >= tip && val <= tip) ||
(lval <= -tip && val >= -tip) || (lval >= -tip && val <= -tip)
) {
if (edge[y][x]) {
edge[y][x] = 3;
} else {

2
web/kiri/gyroid-test.html
View file

@ -318,7 +318,7 @@
// fix record indexes
sparse.forEach((rec,i) => {
rec.index = i;
})
});
timer.mark('sparse');
// preserve sparse points for rendering