private static bool checkCollisionCircleWithSide(CollisionInfo collision)
{
CollisionCircle circle = collision.obj1 as CollisionCircle;
CollisionSide side = collision.obj2 as CollisionSide;
Logger.instance.Assert(null != circle && null != side, "Collision objects incorrect data for CircleWithSide");
if ((side.P1 - circle.Center).Dot(side.DirOut) > circle.Radius)
{
return(false);
}
double distanceToLine = (intersectLine(circle.Center, side.P1, side.P2) - circle.Center).Length;
double distanceToInfinity = (side.P1 - circle.Center).Dot(side.DirOut);
if (-circle.Radius - CollisionSide.SideWidth < distanceToInfinity && distanceToInfinity < circle.Radius &&
distanceToLine <= distanceToInfinity + 1.0e-3)
{
Vector collisionPoint = circle.Center + side.DirOut * distanceToInfinity;
collision.setCollisionData(collisionPoint, side.DirOut.Negative(), side.DirOut);
return(true);
}
return(false);
}
///Other
private List <ICollisionObject> objectsByTilesAndEdgesInfo(Dictionary <TilePos, TileDir[]> tilesInfo)
{
CollisionRect carRect = new CollisionRect(car);
List <ICollisionObject> result = new List <ICollisionObject>();
if (null != tilesInfo)
{
foreach (TilePos pos in tilesInfo.Keys)
{
foreach (TileDir dir in tilesInfo[pos])
{
ICollisionObject obj = null;
if (dir.Correct())
{
obj = new CollisionSide(pos, dir);
}
else
{
obj = new CollisionCircle(pos, dir);
}
if (null == CollisionDetector.CheckCollision(carRect, obj))
{
result.Add(obj);
}
}
}
}
return(result);
}
private static bool checkCollisionRectWithSide(CollisionInfo collision)
{
CollisionRect rect = collision.obj1 as CollisionRect;
CollisionSide side = collision.obj2 as CollisionSide;
Logger.instance.Assert(null != rect && null != side, "Collision objects incorrect data for RectWithSide");
if ((side.P1 - rect.Center).Dot(side.DirOut) > rect.MaxRadius)
{
return(false);
}
Vector[] points = rect.Points;
Vector[] intersects = new Vector[4] {
intersectLine(points[0], side.P1, side.P2),
intersectLine(points[1], side.P1, side.P2),
intersectLine(points[2], side.P1, side.P2),
intersectLine(points[3], side.P1, side.P2),
};
double[] distances = new double[4] {
(side.P1 - points[0]).Dot(side.DirOut),
(side.P1 - points[1]).Dot(side.DirOut),
(side.P1 - points[2]).Dot(side.DirOut),
(side.P1 - points[3]).Dot(side.DirOut)
};
for (int i = 0; i < 4; i++)
{
double distanceToLine = (points[i] - intersects[i]).Length;
if (-CollisionSide.SideWidth < distances[i] && distances[i] < 0 && distanceToLine <= Math.Abs(distances[i]) + 1.0e-3)
{
collision.setCollisionData(intersects[i], side.DirOut.Negative(), side.DirOut);
return(true);
}
}
return(false);
}