|
public static Collide ( |
||
| rectHitboxA | ||
| rectHitboxB | ||
| return | Vector2 | |
private void handleEntitiesCollisions()
{
// Find collisions between entities
foreach (Entity worldEnt in WorldEntities)
{
foreach (PhysicsEntity regEnt in _registeredEntities)
{
if (worldEnt == regEnt)
{
continue;
}
// Look for collisions
if ((regEnt.Hitbox != null) && (worldEnt.Hitbox != null))
{
Vector2 collision = Hitbox.Collide(regEnt.Hitbox, worldEnt.Hitbox);
// Raise event
if (collision != Vector2.Zero)
{
if (regEnt.IsInvincible == false)
{
regEnt.CollisionDetected(worldEnt, collision);
}
}
}
// Look for collisions
if ((regEnt.AwarenessBox != null) && (worldEnt.Hitbox != null) && worldEnt.IsAlive)
{
Vector2 collision = Hitbox.Collide(regEnt.AwarenessBox, worldEnt.Hitbox);
// Raise event
if (collision != Vector2.Zero)
{
regEnt.EntityDetected(worldEnt, collision);
}
}
}
}
}
private bool handleEntityFloorCollisions(PhysicsEntity regEnt, IEnumerable <Floor> floors)
{
bool collisionDetected = false;
foreach (Floor floor in floors)
{
Vector2 collision;
// Do not cross the floor
if (Hitbox.Collide(regEnt.Hitbox, floor.Rectangle, out collision))
{
float absDepthX = Math.Abs(collision.X);
float absDepthY = Math.Abs(collision.Y);
// Resolve the collision along the shallow axis.
if (absDepthY <= absDepthX)
{
bool floorOnTop = floor.Rectangle.Y < regEnt.Hitbox.Dimensions.Y;
// If we crossed the top of a tile, we are on the ground.
if (floorOnTop == false)
{
// Hack for passable platforms
if (floor.IsPassable == false)
{
regEnt.IsOnGround = true;
}
else if (regEnt.Velocity.Y >= 0)
{
regEnt.IsOnGround = true;
}
}
if (floor.IsPassable == false || regEnt.IsOnGround)
{
regEnt.Location = new Vector2(regEnt.Location.X, regEnt.Location.Y + collision.Y);
if (absDepthY != 0)
{
regEnt.Velocity = new Vector2(regEnt.Velocity.X, 0f);
}
}
}
else
{
regEnt.Location = new Vector2(regEnt.Location.X + collision.X, regEnt.Location.Y);
bool passable = (floor.IsPassable == true);
if (!passable)
{
// If going in the direction of the collision
if (floor.Rectangle.X > regEnt.Hitbox.Dimensions.X)
{
regEnt.IsStuckRight = true;
}
else if (floor.Rectangle.X < regEnt.Hitbox.Dimensions.X)
{
regEnt.IsStuckLeft = true;
}
if (absDepthX != 0)
{
regEnt.Velocity = new Vector2(0f, regEnt.Velocity.Y);
}
}
}
regEnt.Hitbox.UpdateBounds();
if (regEnt.FloorCollisionDetected != null)
{
regEnt.FloorCollisionDetected(collision);
}
if (regEnt.IsAlive == false)
{
break;
}
collisionDetected = true;
}
}
return(collisionDetected);
}