private bool TestMapCollision(Rectangle kollitionsRect, Edge riktning, KollitionsStatusTiled KollitionsStatus, out int KollitsionResponse)
{
KollitsionResponse = 0;
Edge side = riktning.OppositeEdge();
int perpindicularPosition = side.IsVertical() ? kollitionsRect.Center.X : kollitionsRect.Center.Y;
int leadingPosition = kollitionsRect.GetSide(riktning);
bool shouldTestSlopes = side.IsVertical();
PopulateCollidingTiles(kollitionsRect, riktning);
for (int i = 0; i < KolliderandeTiles.Count; i++)
{
if (KolliderandeTiles[i] == null)
{
continue;
}
// disregard horizontal collisions with tiles on the same row as a slope if the last tile we were grounded on was a slope.
// the y collision response will push us up on the slope.
if (riktning.IsHorizontal() && KollitionsStatus.SitaGrundadeTile != null &&
KollitionsStatus.SitaGrundadeTile.IsSlope() && IsSlopeCollisionRow(KolliderandeTiles[i].Y))
{
continue;
}
if (TestTileCollision(KolliderandeTiles[i], side, perpindicularPosition, leadingPosition,
shouldTestSlopes, out KollitsionResponse))
{
// store off our last ground tile if we collided below
if (riktning == Edge.Bottom)
{
KollitionsStatus.SitaGrundadeTile = KolliderandeTiles[i];
KollitionsStatus.GrundadPåEnkelriktadPlatform = KollitionsStatus.SitaGrundadeTile.IsOneWayPlatform();
}
return(true);
}
// special case for sloped ground tiles
if (KollitionsStatus.SitaGrundadeTile != null && riktning == Edge.Bottom)
{
// if grounded on a slope and intersecting a slope or if grounded on a wall and intersecting a tall slope we go sticky.
// tall slope here means one where the the slopeTopLeft/Right is 0, i.e. it connects to a wall
var isHighSlopeNearest = KolliderandeTiles[i].IsSlope() &&
KolliderandeTiles[i].GetNearestEdge(perpindicularPosition) ==
KolliderandeTiles[i].GetHighestSlopeEdge();
if ((KollitionsStatus.SitaGrundadeTile.IsSlope() && KolliderandeTiles[i].IsSlope()) || (!KollitionsStatus.SitaGrundadeTile.IsSlope() && isHighSlopeNearest))
{
// store off our last ground tile if we collided below
KollitionsStatus.SitaGrundadeTile = KolliderandeTiles[i];
return(true);
}
}
}
return(false);
}
/// <summary>
/// moves the Entity taking into account the tiled map
/// </summary>
/// <param name="rörelse">Motion.</param>
/// <param name="boxCollider">Box collider.</param>
public void Move(Vector2 rörelse, BoxCollider boxCollider, KollitionsStatusTiled KollitionsStatus)
{
if (Karta == null)
{
return;
}
// test for collisions then move the Entity
TestCollisions(ref rörelse, boxCollider.Bounds, KollitionsStatus);
boxCollider.UnregisterColliderWithPhysicsSystem();
boxCollider.Entity.Transform.Position += rörelse;
boxCollider.RegisterColliderWithPhysicsSystem();
}
public void TestCollisions(ref Vector2 rörelse, Rectangle boxColliderGränser, KollitionsStatusTiled KollitionsStatus)
{
BoxColliderGränser = boxColliderGränser;
// save off our current grounded state which we will use for wasGroundedLastFrame and becameGroundedThisFrame
KollitionsStatus.VarGrundadFöraFramen = KollitionsStatus.Under;
// reset our collisions state
KollitionsStatus.Återställ(ref rörelse);
// reset rounded motion for us while dealing with subpixel movement so fetch the rounded values to use for our actual detection
int motionX = (int)rörelse.X;
int motionY = (int)rörelse.Y;
// first, check movement in the horizontal dir
if (motionX != 0)
{
Edge direction = motionX > 0 ? Edge.Right : Edge.Left;
Rectangle sweptBounds = CollisionRectForSide(direction, motionX);
int collisionResponse;
if (TestMapCollision(sweptBounds, direction, KollitionsStatus, out collisionResponse))
{
// react to collision. get the distance between our leading edge and what we collided with
rörelse.X = collisionResponse - boxColliderGränser.GetSide(direction);
KollitionsStatus.Vänster = direction == Edge.Left;
KollitionsStatus.Höger = direction == Edge.Right;
KollitionsStatus.RörelsePåminareX.Reset();
}
else
{
KollitionsStatus.Vänster = false;
KollitionsStatus.Höger = false;
}
}
// next, check movement in the vertical dir
{
Edge riktning = motionY >= 0 ? Edge.Bottom : Edge.Top;
Rectangle sweptGränser = CollisionRectForSide(riktning, motionY);
sweptGränser.X += (int)rörelse.X;
int KollitsionResponse;
if (TestMapCollision(sweptGränser, riktning, KollitionsStatus, out KollitsionResponse))
{
// react to collision. get the distance between our leading edge and what we collided with
rörelse.Y = KollitsionResponse - boxColliderGränser.GetSide(riktning);
KollitionsStatus.Ovanför = riktning == Edge.Top;
KollitionsStatus.Under = riktning == Edge.Bottom;
KollitionsStatus.RörelsePåminareY.Reset();
if (KollitionsStatus.Under && KollitionsStatus.SitaGrundadeTile?.IsSlope() == true)
{
KollitionsStatus.SlopeVinkel = MathHelper.ToDegrees((float)Math.Atan(KollitionsStatus.SitaGrundadeTile.GetSlope()));
}
}
else
{
KollitionsStatus.Ovanför = false;
KollitionsStatus.Under = false;
KollitionsStatus.SitaGrundadeTile = null;
}
// when moving down we also check for collisions in the opposite direction. this needs to be done so that ledge bumps work when
// a jump is made but misses by the colliderVerticalInset
if (riktning == Edge.Bottom)
{
riktning = riktning.OppositeEdge();
sweptGränser = CollisionRectForSide(riktning, 0);
sweptGränser.X += (int)rörelse.X;
sweptGränser.Y += (int)rörelse.Y;
if (TestMapCollision(sweptGränser, riktning, KollitionsStatus, out KollitsionResponse))
{
// react to collision. get the distance between our leading edge and what we collided with
rörelse.Y = KollitsionResponse - boxColliderGränser.GetSide(riktning);
// if we collide here this is an overlap of a slope above us. this small bump down will prevent hitches when hitting
// our head on a slope that connects to a solid tile. It puts us below the slope when the normal response would put us
// above it
rörelse.Y += 2;
KollitionsStatus.Ovanför = true;
}
}
}
// set our becameGrounded state based on the previous and current collision state
if (!KollitionsStatus.VarGrundadFöraFramen && KollitionsStatus.Under)
{
KollitionsStatus.BlevGrundadDennaFrame = true;
}
}
