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taking into account NURBS orientation while ARC-NURBS reconciliating

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Val Erastov 2019-01-11 19:49:59 -08:00
parent 2a63ae383a
commit 2afc7727db
1 changed files with 18 additions and 1 deletions
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19
web/app/cad/sketch/sketchBoundaries.js
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@ -20,11 +20,28 @@ export function getSketchBoundaries(sceneFace) {
let arcRadius = findArcRadius(curve2d);
if (arcRadius !== null){
let [from, to] = curve2d.domain();
let [A, DA] = curve2d.eval(from, 1);
let [A, DA, DDA] = curve2d.eval(from, 2);
let [B, DB] = curve2d.eval(to, 1);
let mA = vec.normalize(DA);
let mmA = vec.normalize(DDA);
let orient = mA[0] * mmA[1] - mA[1] * mmA[0];
if (orient < 0) {
let t;
t = B;
B = A;
A = t;
t = DB;
DB = DA;
DA = t;
mA = vec.normalize(DA);
}
if (veqXYZ(A[0], A[1], 0, B[0], B[1], 0)) {
let centripetal = perpXY(vec.mul(mA, arcRadius));
let c = vec._add(centripetal, A);