/// <summary>
/// Check if this EllipseCollider is colliding with the given SegmentCollider.
/// </summary>
/// <param name="segment"></param>
/// <returns></returns>
public CollisionResponse CollidingWith(SegmentCollider segment)
{
var c_res = new CollisionResponse(this, segment, false);
double X1 = segment.Start.X,
X2 = segment.End.X,
Y1 = segment.Start.Y,
Y2 = segment.End.Y;
var intersections = EllipseUtils.EllipseLineIntersections(X, Y, A, B, X1, Y1, X2, Y2);
if (intersections.Length == 0)
return c_res;
var valid = new List<Vector2>();
foreach (var poi in intersections)
{
if (LinearUtils.IsPointInSegmentRange(
poi.X, poi.Y, X1, Y1, X2, Y2))
valid.Add(poi);
}
var count = valid.Count;
if (count == 0)
return c_res;
c_res.SetAttr<int>("NumIntersections", count);
c_res.SetAttr<Vector2[]>("IntersectionPoints", valid.ToArray());
return c_res;
}
public SegmentCollider(SegmentCollider other)
{
Start = other.Start;
End = other.End;
}
/// <summary>
/// Check if this RectCollider is colliding with the given SegmentCollider.
/// </summary>
/// <param name="segment"></param>
/// <returns></returns>
public CollisionResponse CollidingWith(SegmentCollider segment)
{
var intersections = new List<Vector2>();
var corners = Coords;
Vector2 p1, p2;
Vector2? poi;
for (int i = 0; i < 4; i++)
{
p1 = corners[(i - 1) % 4];
p2 = corners[i];
poi = LinearUtils.SegmentIntersectionPoint(
p1.X, p1.Y, p2.X, p2.Y,
segment.Start.X, segment.Start.Y,
segment.End.X, segment.End.Y
);
if (poi.HasValue)
intersections.Add(poi.Value);
}
var c_res = new CollisionResponse(this, segment, intersections.Count > 0);
if (!c_res.Colliding)
return c_res;
c_res.SetAttr<Vector2[]>("Intersections", intersections.ToArray());
return c_res;
}
/// <summary>
/// Check if this SegmentCollider is colliding with the given SegmentCollider.
/// </summary>
/// <param name="segment"></param>
/// <returns></returns>
public CollisionResponse CollidingWith(SegmentCollider segment)
{
var poi = LinearUtils.SegmentIntersectionPoint(
Start.X, Start.Y, End.X, End.Y, segment.Start.X,
segment.Start.Y, segment.End.X, segment.End.Y
);
var c_res = new CollisionResponse(this, segment, poi.HasValue);
if (!c_res.Colliding)
return c_res;
c_res.SetAttr<Vector2>("IntersectionPoint", poi.Value);
return c_res;
}