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);
}
public void TangentToCircleConstraintWithLineInitiallyThroughCenter()
{
// Create a fully constrained circle at 0,0 with radius 1
var circle = new Circle() { center = new Point(0, 0, false), rad = new Parameter(1, false) };
var v = 1 / Math.Sin(Math.PI / 4);
var line = new Line(new Point(0, -v, false, false), new Point(0, v, true, false));
var r = SketchSolve.Solver.solve
( true
, line.IsTangentTo(circle));
Console.WriteLine (line);
r.Should().BeApproximately(0,0.0001);
(circle.CenterTo (line).Vector.LengthSquared - 1).Should ().BeApproximately (0, 0.001);
}
public void TangentToCircleConstraintWithLineInitiallyHorizontalShouldWork()
{
// Create a fully constrained circle at 0,0 with radius 1
var circle = new Circle() { center = new Point(0, 0, false), rad = new Parameter(10, false) };
var v = -15;
var line = new Line(new Point(-100, -v, false, true), new Point(100, -v*2.1, false, true));
var r = SketchSolve.Solver.solve
( true
, line.IsTangentTo(circle)
, line.IsHorizontal()
);
Console.WriteLine (line);
Console.WriteLine (circle);
(circle.CenterTo (line).Vector.LengthSquared - circle.rad.Value*circle.rad.Value)
.Should ()
.BeApproximately (0, 0.001);
}
public void TangentToCircleConstraintShouldWork()
{
// Create a fully constrained circle at 0,0 with radius 1
var circle = new Circle() { center = new Point(0, 0, false), rad = new Parameter(1, false) };
var v = 1 / Math.Sin(Math.PI / 4);
var line = new Line(new Point(0, -v, false, false), new Point(35, 0, true, false));
var r = SketchSolve.Solver.solve
( true
, line.IsTangentTo(circle));
r.Should().BeApproximately(0,0.0001);
line.p2.x.Value.Should().BeApproximately(v, 0.001);
}