public static Constraint HasExternalAngle(this Line This, Line other, Parameter angle){
return new Constraint()
{
type = ConstraintEnum.externalAngle,
line1 = This,
line2 = other,
parameter = angle
};
}
// We don't use this at the moment
static List<NonlinearConstraint> CreateConstraints (Parameter[] x, NonlinearObjectiveFunction f)
{
// Now we can start stating the constraints
var nlConstraints = x.SelectMany ((p, i) => {
Func<double[], double> cfn = args => x [i].Value;
return new[] {
new NonlinearConstraint
( f
, function: cfn
, shouldBe: ConstraintType.GreaterThanOrEqualTo
, value: p.Min
, gradient: Grad (x.Length, cfn)),
new NonlinearConstraint
( f
, function: cfn
, shouldBe: ConstraintType.LesserThanOrEqualTo
, value: p.Max
, gradient: Grad (x.Length, cfn)),
};
}).ToList ();
return nlConstraints;
}
public void SquareAroundCircle()
{
var circle = new Circle() { center = new Point(0, 0, false), rad = new Parameter(10, false) };
// We want a box around the circle where all lines touch the
// circle and line0 is vertical. We arrange the lines roughly
// in the correct placement to get the search off to a good
// start
var line0 = new Line(new Point(-21,0), new Point(0, 23));
var line1 = new Line(new Point(0,22), new Point(22, 0));
var line2 = new Line(new Point(21,0), new Point(0, -29));
var line3 = new Line(new Point(0,-27), new Point(-25, 0));
var angle = new Parameter (Math.PI/2, false);
var r = SketchSolve.Solver.solve
( true
, line0.IsTangentTo(circle)
, line1.IsTangentTo(circle)
, line2.IsTangentTo(circle)
, line3.IsTangentTo(circle)
, line0.HasInternalAngle (line1, angle)
, line1.HasInternalAngle(line2, angle)
, line2.HasInternalAngle(line3, angle)
, line3.HasInternalAngle(line0, angle)
, line0.p2.IsColocated(line1.p1)
, line1.p2.IsColocated(line2.p1)
, line2.p2.IsColocated(line3.p1)
, line3.p2.IsColocated(line0.p1)
, line0.IsVertical()
//, line1.IsHorizontal()
//, line2.IsVertical()
//, line3.IsHorizontal()
);
Console.WriteLine (line0);
Console.WriteLine (line1);
Console.WriteLine (line2);
Console.WriteLine (line3);
Console.WriteLine (circle.CenterTo(line0));
r.Should ().BeApproximately (0, 0.0001);
}