//Circle
public static bool CircleToCircle(CircleCollider circle1, CircleCollider circle2)
{
var dx = circle2.Position.X - circle1.Position.X;
var dy = circle2.Position.Y - circle2.Position.Y;
var radii = circle1.Radius + circle2.Radius;
return((dx * dx) + (dy * dy) < (radii * radii));
}
public override bool Collide(CircleCollider circle)
{
foreach (var c in colliders)
{
if (c.Collide(circle))
{
return(true);
}
}
return(false);
}
//Line
public static bool CircleToLine(CircleCollider circle, Vector2 lineStart, Vector2 lineEnd)
{
var direction = lineEnd - lineStart;
direction.Normalize();
var distance = Vector2.Dot(direction, circle.Position);
if (distance >= circle.Radius)
{
return(true);
}
return(false);
}
public static bool CircleToPoint(CircleCollider circle, Vector2 point)
{
return(CircleToPoint(circle.Position.X, circle.Position.Y, circle.Radius, point.X, point.Y));
}
//Circle
public static bool LineToCircle(float lineStartX, float lineStartY, float lineEndX, float lineEndY, CircleCollider circle)
{
return(CircleToLine(circle, new Vector2(lineStartX, lineStartY), new Vector2(lineEndX, lineEndY)));
}
public static bool RectToCircle(RectCollider rect, CircleCollider circle)
{
return(RectToCircle(rect.AbsolutePosition.X, rect.AbsolutePosition.Y, rect.Width, rect.Height, circle.AbsolutePosition.X, circle.AbsolutePosition.Y, circle.Radius));
}
public static bool RectToCircle(Rectangle rect, CircleCollider circle)
{
return(RectToCircle(rect.X, rect.Y, rect.Width, rect.Height, circle.Position.X, circle.Position.Y, circle.Radius));
}
//Rectangle
public static bool CircleToRectangle(CircleCollider circle, RectCollider rect)
{
return(RectToCircle(rect, circle));
}
public override bool Collide(CircleCollider circle)
{
return(false);
}