private static Polygon _makeRectangle(Vector baseSegment, Distance height, Direction referencePlaneNormal)
{
if (referencePlaneNormal == null)
{
referencePlaneNormal = Direction.Out;
}
Direction heightDirection = referencePlaneNormal.CrossProduct(baseSegment.Direction);
var heightVector = new Vector(heightDirection, height);
Polygon polygon = Parallelogram(baseSegment, heightVector);
return polygon;
}
private static Shift GetRotation(Direction normal)
{
if (normal.IsParallelTo(Direction.Out))
{
return Rotation.Identity;
}
var angle = normal.AngleBetween(Direction.Out);
var axis = new Line(normal.CrossProduct(Direction.Out));
var rotation = new Shift(new Rotation(axis, angle));
return rotation;
}
public Arc(Point basePoint, Point endPoint, Direction initialDirection)
{
this.BasePoint = basePoint;
this.EndPoint = endPoint;
if (this.IsClosed)
{
throw new GeometricException("Not enough information given to determine curvature.");
}
var segmentBetweenPoints = new LineSegment(basePoint,endPoint);
this.NormalDirection = initialDirection.CrossProduct(segmentBetweenPoints.Direction);
var plane1 = new Plane(BasePoint, initialDirection);
var plane2 = new Plane(segmentBetweenPoints.MidPoint, segmentBetweenPoints.Direction);
var intersectingLine = plane1.IntersectWithPlane(plane2);
var containingPlane = new Plane(BasePoint, NormalDirection);
var centerPoint = intersectingLine.IntersectWithPlane(containingPlane);
this.CenterPoint = centerPoint;
//var line1 = new Line(BasePoint, NormalDirection.CrossProduct(initialDirection));
//var line2 = new Line(segmentBetweenPoints.MidPoint, NormalDirection.CrossProduct(segmentBetweenPoints.Direction));
//this._centerPoint = line1.IntersectWithLine(line2);
}
