public LineCollider(Object owner)
: base(owner, CollisionMethods.ColliderType.Line)
{
m_line = new LineSegment(Vector2.Zero, Vector2.Zero);
}
public bool IntersectsLines(LineSegment ls1, LineSegment ls2)
{
Vector2 A = ls1.A_Global, B = ls1.B_Global, C = ls2.A_Global, D = ls2.B_Global;
return IntersectsLines(A, B, C, D);
}
public bool LineAABB(Collider line, Collider aabb)
{
LineSegment ls = ((LineCollider)line).Line;
LineSegment ls2 = new LineSegment(Vector2.Zero, Vector2.Zero);
Rectangle r = ((AABBCollider)aabb).Bounds;
if (r.Contains(new Point((int)ls.A_Global.X, (int)ls.A_Global.Y))
|| r.Contains(new Point((int)ls.B_Global.X, (int)ls.B_Global.Y))
|| m_helper.IntersectsLines(ls.A_Global, ls.B_Global, new Vector2(r.Left, r.Top), new Vector2(r.Right, r.Top))
|| m_helper.IntersectsLines(ls.A_Global, ls.B_Global, new Vector2(r.Right, r.Top), new Vector2(r.Right, r.Bottom))
|| m_helper.IntersectsLines(ls.A_Global, ls.B_Global, new Vector2(r.Right, r.Bottom), new Vector2(r.Left, r.Bottom))
|| m_helper.IntersectsLines(ls.A_Global, ls.B_Global, new Vector2(r.Left, r.Bottom), new Vector2(r.Left, r.Top)))
return true;
return false;
}
public bool Contains(Circle container, LineSegment contained)
{
return Contains(container, contained.A_Global) && Contains(container, contained.B_Global);
}
public bool IntersectsCircleLine(Circle circle, LineSegment segment)
{
return IntersectsCircleLine(circle.Transform.PositionGlobal, circle.Radius, segment.A_Global, segment.B_Global);
}
public bool GetIntersection(Rectangle rectangle, LineSegment segment, out Vector2 intersection)
{
bool isIntersecting = false;
Vector2 topLeft = new Vector2(rectangle.X, rectangle.Y);
Vector2 topRight = new Vector2(rectangle.X + rectangle.Width, rectangle.Y);
Vector2 bottomRight = new Vector2(rectangle.X + rectangle.Width, rectangle.Y + rectangle.Height);
Vector2 bottomLeft = new Vector2(rectangle.X, rectangle.Y + rectangle.Height);
intersection = Vector2.Zero;
Vector2 newIntersection;
//if (GetIntersection(new LineSegment(topRight, bottomRight), segment, out intersection)
// || GetIntersection(new LineSegment(topRight, bottomRight), segment, out intersection)
// || GetIntersection(new LineSegment(bottomRight, bottomLeft), segment, out intersection)
// || GetIntersection(new LineSegment(topLeft, topRight), segment, out intersection))
// return true;
isIntersecting = GetIntersection(new LineSegment(topLeft, topRight), segment, out intersection);
if (GetIntersection(new LineSegment(topRight, bottomRight), segment, out newIntersection))
{
if (!isIntersecting)
intersection = newIntersection;
else
intersection = (intersection + newIntersection) * 0.5f;
isIntersecting = true;
}
if (GetIntersection(new LineSegment(bottomRight, bottomLeft), segment, out newIntersection))
{
if (!isIntersecting)
intersection = newIntersection;
else
intersection = (intersection + newIntersection) * 0.5f;
isIntersecting = true;
}
if (isIntersecting = GetIntersection(new LineSegment(bottomLeft, topLeft), segment, out newIntersection))
{
if (!isIntersecting)
intersection = newIntersection;
else
intersection = (intersection + newIntersection) * 0.5f;
isIntersecting = true;
}
return isIntersecting;
}
public Vector2 GetProjectionPoint(LineSegment screen, Vector2 projector)
{
return GetProjectionPoint(screen.A_Global, screen.B_Global, projector);
}
public bool IsParallel(LineSegment L2)
{
return (IsVertical && L2.IsVertical)
|| Gradient == L2.Gradient;
}
public bool GetIntersection(LineSegment segmentA, LineSegment segmentB, out Vector2 intersection)
{
intersection = Vector2.Zero;
Vector2 A = segmentA.A_Global;
Vector2 C = segmentB.A_Global;
Vector2 I = segmentA.Difference;
Vector2 J = segmentB.Difference;
float m = -(-I.X * A.Y + I.X * C.Y + I.Y * A.X - I.Y * C.X) / (I.X * J.Y - I.Y * J.X);
float k = -(A.X * J.Y - C.X * J.Y - J.X * A.Y + J.X * C.Y) / (I.X * J.Y - I.Y * J.X); ;
if( 0 < m && m < 1
&& 0 < k && k < 1)
{
intersection = A + k * I;
return true;
}
return false;
}
/// <summary>
/// Define a straight line by using a line segment.
/// </summary>
/// <param name="ls">Line segment.</param>
public StraightLine(LineSegment ls)
: this(ls.A_Global, ls.B_Global)
{
}
public bool IsEqual(LineSegment L2)
{
return A_Global == L2.A_Global && B_Global == L2.B_Global;
}
public LineCollider(Object owner)
: base(owner, CollisionMethods.ColliderType.Line)
{
m_line = new LineSegment(Vector2.Zero, Vector2.Zero);
}
public bool IntersectsCircleLine(Circle circle, LineSegment segment)
{
return(IntersectsCircleLine(circle.Transform.PositionGlobal, circle.Radius, segment.A_Global, segment.B_Global));
}
public Vector2 GetProjectionPoint(LineSegment screen, Vector2 projector)
{
return(GetProjectionPoint(screen.A_Global, screen.B_Global, projector));
}
public bool Contains(Circle container, LineSegment contained)
{
return(Contains(container, contained.A_Global) && Contains(container, contained.B_Global));
}
public bool IntersectsLines(LineSegment ls1, LineSegment ls2)
{
Vector2 A = ls1.A_Global, B = ls1.B_Global, C = ls2.A_Global, D = ls2.B_Global;
return(IntersectsLines(A, B, C, D));
}
