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fix arcs reconstruction

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This commit is contained in:
Val Erastov 2016-05-23 23:40:49 -07:00
parent ff8f448bd7
commit 3f8f264851
1 changed files with 38 additions and 12 deletions
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50
web/app/3d/main.js
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@ -142,24 +142,50 @@ TCAD.App.prototype.sketchFace = function() {
b : {x : b.x, y: b.y}
});
}
function addArc(arc) {
if (arc.length < 2) {
return;
}
var a = arc[0], b = arc[arc.length - 1];
if (arc.length == 2) {
addSegment(a, b);
return;
}
var mid = (arc.length / 2) >> 0;
var c = TCAD.math.circleFromPoints(arc[0], arc[mid], arc[arc.length-1]);
if (c == null) {
function addArcAsSegments(arc) {
for (var i = 1; i < arc.length; i++) {
addSegment(arc[i - 1], arc[i]);
}
}
if (arc.length < 5) {
addArcAsSegments(arc);
return;
}
if (!TCAD.geom.isCCW([arc[0], arc[mid], arc[arc.length-1]])) {
var a = arc[1], b = arc[arc.length - 2];
var mid = (arc.length / 2) >> 0;
var c = TCAD.math.circleFromPoints(a, arc[mid], b);
if (c == null) {
addArcAsSegments(arc);
return;
}
var dist = TCAD.math.distanceAB;
var rad = dist(a, c);
if (Math.abs(rad - dist(b, c)) > TCAD.TOLERANCE) {
addArcAsSegments(arc);
return;
}
var firstPoint = arc[0];
var lastPoint = arc[arc.length - 1];
if (Math.abs(rad - dist(firstPoint, c)) < TCAD.TOLERANCE) {
a = firstPoint;
} else {
addSegment(firstPoint, a);
}
if (Math.abs(rad - dist(lastPoint, c)) < TCAD.TOLERANCE) {
b = lastPoint;
} else {
addSegment(b, lastPoint);
}
if (!TCAD.geom.isCCW([a, arc[mid], b])) {
var t = a;
a = b;
b = t;