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improved arc detection. fixed some arcs transitioning choppily.

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This commit is contained in:
Mikhail Allen 2021-06-19 23:11:53 -04:00
commit 0af6eb6c61
1 changed files with 24 additions and 7 deletions
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31
src/mode/fdm/export.js
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@ -541,11 +541,11 @@
if (lr) {
let angle = 2 * Math.asin(dist/(2*lr.r));
radFault = Math.abs(angle) > Math.PI * 2 / arcRes; // enforce arcRes(olution)
if (arcQ.center) {
arcQ.rSum = arcQ.center.reduce( function (t, v) { return t + v.r }, 0 );
let avg = arcQ.rSum / arcQ.center.length;
radFault = radFault || Math.abs(avg - lr.r) / avg > arcDev; // eliminate sharps and flats when local rad is out of arcDev(iation)
}
// if (arcQ.center) {
// arcQ.rSum = arcQ.center.reduce( function (t, v) { return t + v.r }, 0 );
// let avg = arcQ.rSum / arcQ.center.length;
// radFault = radFault || Math.abs(avg - lr.r) / avg > arcDev; // eliminate sharps and flats when local rad is out of arcDev(iation)
// }
} else {
radFault = true;
}
@ -563,6 +563,7 @@
// check center point delta
arcQ.xSum = arcQ.center.reduce( function (t, v) { return t + v.x }, 0 );
arcQ.ySum = arcQ.center.reduce( function (t, v) { return t + v.y }, 0 );
arcQ.rSum = arcQ.center.reduce( function (t, v) { return t + v.r }, 0 );
let dx = cc.x - arcQ.xSum / arcQ.center.length;
let dy = cc.y - arcQ.ySum / arcQ.center.length;
dc = Math.sqrt(dx * dx + dy * dy);
@ -659,15 +660,32 @@
return;
}
if (arcQ.length > 4) {
// ondebug({arcQ});
let vec1 = new THREE.Vector2(arcQ[1].x - arcQ[0].x, arcQ[1].y - arcQ[0].y);
let vec2 = new THREE.Vector2(arcQ.center[0].x - arcQ[0].x, arcQ.center[0].y - arcQ[0].y);
let gc = vec1.cross(vec2) < 0 ? 'G2' : 'G3';
let from = arcQ[0];
let to = arcQ.peek();
arcQ.xSum = arcQ.center.reduce( function (t, v) { return t + v.x }, 0 );
arcQ.ySum = arcQ.center.reduce( function (t, v) { return t + v.y }, 0 );
arcQ.rSum = arcQ.center.reduce( function (t, v) { return t + v.r }, 0 );
let cl = arcQ.center.length;
let cc = {x:arcQ.xSum/cl, y:arcQ.ySum/cl, z:arcQ[0].z, r:arcQ.rSum/cl};
let cc;
let angle = BASE.util.thetaDiff(
Math.atan2((from.y - arcQ.ySum / cl), (from.x - arcQ.xSum / cl)),
Math.atan2((to.y - arcQ.ySum / cl), (to.x - arcQ.xSum / cl)),
gc === "G2"
);
if (Math.abs(angle) <= 3 * Math.PI / 4) {
cc = BASE.util.center2pr(from, to, arcQ.rSum / cl, gc === "G3");
}
if (!cc) {
cc = {x:arcQ.xSum/cl, y:arcQ.ySum/cl, z:arcQ[0].z, r:arcQ.rSum/cl};
}
// first arc point
emitQrec(from);
// console.log(arcQ.slice(), arcQ.center);
@ -681,7 +699,6 @@
if (extrudeAbs) {
emit = outputLength;
}
let gc = vec1.cross(vec2) < 0 ? 'G2' : 'G3';
// XYR form
// let pre = `${gc} X${to.x.toFixed(decimals)} Y${to.y.toFixed(decimals)} R${cc.r.toFixed(decimals)} E${emit.toFixed(decimals)}`;
// XYIJ form