// Arc
// Rh Capture can be a circle OR an arc
public Base ArcToSpeckle(ArcCurve a, string units = null)
{
var u = units ?? ModelUnits;
if (a.IsClosed)
{
RH.Circle preCircle;
a.TryGetCircle(out preCircle);
Circle myCircle = CircleToSpeckle(preCircle, u);
myCircle.domain = IntervalToSpeckle(a.Domain);
myCircle.length = a.GetLength();
myCircle.bbox = BoxToSpeckle(new RH.Box(a.GetBoundingBox(true)), u);
return(myCircle);
}
else
{
RH.Arc preArc;
a.TryGetArc(out preArc);
Arc myArc = ArcToSpeckle(preArc, u);
myArc.domain = IntervalToSpeckle(a.Domain);
myArc.length = a.GetLength();
myArc.bbox = BoxToSpeckle(new RH.Box(a.GetBoundingBox(true)), u);
return(myArc);
}
}
public List <Curve> buildGear(List <Circle> C, double Teeth, double Angle, double profileShift, double addendum, double dedendum, out List <int> teethNumber)
{
List <Curve> curves = new List <Curve>();
ArcCurve sC = new ArcCurve(C[0]);
if (C.Count > 1)
{
sC = smallestCircle(C);
}
double m = (2 * sC.Radius) / Teeth;
addendum = addendum * m;
dedendum = dedendum * m;
teethNumber = new List <int>();
for (int i = 0; i < C.Count; i++)
{
List <Curve> profiles = new List <Curve>();
Circle baseCir = new Circle(C[i].Plane, C[i].Radius * Math.Cos(toRadian(Angle)));
Circle addCir = new Circle(C[i].Plane, C[i].Radius + addendum);
Circle dedCir = new Circle(C[i].Plane, C[i].Radius - dedendum);
Curve profile = involute(baseCir, Angle, addCir, dedCir);
int teethCount = (int)(Teeth * (C[i].Radius / sC.Radius)); // teeth number
teethNumber.Add(teethCount);
//mirror profile
Vector3d newX = C[i].Plane.XAxis;
//the thickness of gear, should be halt of pitch angle
if (profileShift != 0)
{
newX.Rotate((Math.PI + profileShift * Math.PI * Math.Tan(Angle)) / (double)teethCount, C[i].Normal); //circular pitch
}
else
{
newX.Rotate(Math.PI / teethCount, C[i].Normal);
}
Curve mirProfile = profile.DuplicateCurve();
Transform mirror = Transform.Mirror(new Plane(C[i].Center, newX + C[i].Plane.XAxis, C[i].Normal));
mirProfile.Transform(mirror);
//align the profile
var ccx = Rhino.Geometry.Intersect.Intersection.CurveCurve(profile, new ArcCurve(C[i]), 1, 1);
Transform aligned = Transform.Rotation(ccx[0].PointA - C[i].Center, C[i].Plane.XAxis, C[i].Center);
profile.Transform(aligned);
mirProfile.Transform(aligned);
//tip and buttom arc
double addAngle = Vector3d.VectorAngle(profile.PointAtEnd - C[i].Center, mirProfile.PointAtEnd - C[i].Center);
double dedAngle = (1.0 / (double)teethCount) * Math.PI * 2 - Vector3d.VectorAngle(profile.PointAtStart - C[i].Center, mirProfile.PointAtStart - C[i].Center);
Plane addPln = new Plane(C[i].Center, profile.PointAtEnd - C[i].Center, C[i].Plane.YAxis);
Plane dedPln = new Plane(C[i].Center, mirProfile.PointAtStart - C[i].Center, C[i].Plane.YAxis);
ArcCurve tip = new ArcCurve(new Arc(addPln, C[i].Radius + addendum, addAngle));
ArcCurve buttom = new ArcCurve(new Arc(dedPln, C[i].Radius - dedendum, dedAngle));
//display
locations.Add(tip.PointAtNormalizedLength(0.5)); //tip
texts.Add(Math.Round(tip.GetLength(), 2).ToString());
sizes.Add((addendum + dedendum) * 4);
locations.Add(profile.PointAtStart); //profile
texts.Add(Math.Round(profile.GetLength(), 2).ToString());
sizes.Add((addendum + dedendum) * 4);
//teeth
mirProfile.Reverse();
List <Curve> CS = new List <Curve> {
profile, tip, mirProfile, buttom
};
Curve teethC = Curve.JoinCurves(CS, 0.1, true)[0];
for (int j = 0; j < teethCount; j++)
{
Curve presentProfile = teethC.DuplicateCurve();
double step = ((double)j / (double)teethCount) * Math.PI * 2;
Transform rotate = Transform.Rotation(step, C[i].Normal, C[i].Center);
presentProfile.Transform(rotate);
profiles.Add(presentProfile);
}
curves.Add(Curve.JoinCurves(profiles, 0.01, true)[0]);
}
return(curves);
}
