public void LineRectangleOverlap()
{
var line = new Line(new Position2D(-4, -4), new Position2D(4, 4));
var transformA = Transform2D.DefaultTransform;
var square = new MoonTools.Core.Bonk.Rectangle(-1, -1, 1, 1);
var transformB = Transform2D.DefaultTransform;
var(result, simplex) = NarrowPhase.FindCollisionSimplex(line, transformA, square, transformB);
result.Should().BeTrue();
var intersection = NarrowPhase.Intersect(line, transformA, square, transformB, simplex);
var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
NarrowPhase.TestCollision(line, movedTransform, square, transformB).Should().BeFalse();
}
public void RectangleOverlap()
{
var squareA = new MoonTools.Core.Bonk.Rectangle(-1, -1, 1, 1);
var transformA = Transform2D.DefaultTransform;
var squareB = new MoonTools.Core.Bonk.Rectangle(-1, -1, 1, 1);
var transformB = new Transform2D(new Vector2(1.5f, 0));
var(result, simplex) = NarrowPhase.FindCollisionSimplex(squareA, transformA, squareB, transformB);
result.Should().BeTrue();
var intersection = NarrowPhase.Intersect(squareA, transformA, squareB, transformB, simplex);
intersection.X.Should().Be(1f);
intersection.Y.Should().Be(0);
var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
NarrowPhase.TestCollision(squareA, movedTransform, squareB, transformB).Should().BeFalse();
}
public void CircleOverlap()
{
var circleA = new Circle(2);
var transformA = Transform2D.DefaultTransform;
var circleB = new Circle(1);
var transformB = new Transform2D(new Vector2(1, 1));
var(result, simplex) = NarrowPhase.FindCollisionSimplex(circleA, transformA, circleB, transformB);
result.Should().BeTrue();
var intersection = NarrowPhase.Intersect(circleA, transformA, circleB, transformB, simplex);
var ix = (circleA.Radius * (float)Math.Cos(Math.PI / 4)) - ((circleB.Radius * (float)Math.Cos(5 * Math.PI / 4)) + transformB.Position.X);
var iy = (circleA.Radius * (float)Math.Sin(Math.PI / 4)) - ((circleB.Radius * (float)Math.Sin(5 * Math.PI / 4)) + transformB.Position.Y);
intersection.X.Should().BeApproximately(ix, 0.01f);
intersection.Y.Should().BeApproximately(iy, 0.01f);
var movedTransform = new Transform2D(transformA.Position - (intersection * 1.01f)); // move a tiny bit past
NarrowPhase.TestCollision(circleA, movedTransform, circleB, transformB).Should().BeFalse();
}