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add mirroring, exclude normals from bounds, fix paint selection update

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This commit is contained in:
Stewart Allen 2022-01-20 00:01:48 -05:00
commit 5d2f4ac02e
7 changed files with 88 additions and 7 deletions
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26
src/mesh/work.js
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@ -72,8 +72,30 @@ let model = {
// return new vertices in world coordinates
duplicate(data) {
let { id, matrix } = data;
return translate_encode(id, matrix);
let { id, matrix, opt } = data;
let array = translate_encode(id, matrix);
if (opt.mirror) {
// find max z and invert z
let maxz = -Infinity;
for (let i=2, l=array.length; i<l; i += 3) {
maxz = Math.max(maxz, array[i]);
array[i] = -array[i];
}
maxz *= 2;
for (let i=0, l=array.length; i<l; i += 9) {
// swap first two vertices in face to invert normals
let v1 = array.slice(i, i+3);
for (let j=0; j<3; j++) {
array[i+j] = array[i+j+3];
array[i+j+3] = v1[j];
}
// move part up in Z
array[i+2] += maxz;
array[i+5] += maxz;
array[i+8] += maxz;
}
}
return array;
},
// merge several model vertices into a single array