public void DetectTouchedBlocks(ICollisionEngineContext context, IMovableObject checkedObject)
{
checkedObject.TouchedObjects.Clear();
var areaToCheck = IntRectangle.FromPositionAndSize(checkedObject.Position, checkedObject.Size).Extend(Constants.BlockSize);
var checkedObjBounds = checkedObject.Bounds;
foreach (var obj in context.GetCollidableObjectsWithin(areaToCheck))
{
if (obj == checkedObject)
{
continue;
}
if (obj.IsSolid)
{
var objBounds = CoordinateSystem.Denormalize(obj.Bounds, checkedObjBounds);
if (checkedObjBounds.TryGetTouchedSide(objBounds, out var touchedSide))
{
checkedObject.TouchedObjects[touchedSide].Add(obj);
}
}
}
}
public void MoveUp(ICollisionEngineContext context, IMovableObject movingObj, int distance)
{
var movingObjBounds = movingObj.Bounds;
var sweptArea = new IntRectangle(movingObjBounds.Left, movingObjBounds.Top - distance, movingObjBounds.Front, movingObjBounds.Width, distance, movingObjBounds.Depth);
var areaToCheck = sweptArea.Extend(Constants.BlockSize);
foreach (var obj in context.GetCollidableObjectsWithin(areaToCheck))
{
if (obj == movingObj)
{
continue;
}
var objBounds = CoordinateSystem.Denormalize(obj.Bounds, sweptArea);
if (obj.IsSolid && sweptArea.Intersects(objBounds))
{
sweptArea = new IntRectangle(sweptArea.Left, objBounds.Bottom, sweptArea.Front, sweptArea.Width, sweptArea.Bottom - objBounds.Bottom, sweptArea.Depth);
}
}
movingObj.Position = movingObj.Position.MoveUp(sweptArea.Height);
}
public void MoveVertical(ICollisionEngineContext context, IMovableObject movingObj, int offset)
{
if (offset > 0)
{
MoveDown(context, movingObj, offset);
}
else if (offset < 0)
{
MoveUp(context, movingObj, -offset);
}
}
public void MoveHorizontal(ICollisionEngineContext context, IMovableObject movingObj, int distance)
{
if (distance > 0)
{
MoveRight(context, movingObj, distance);
}
else if (distance < 0)
{
MoveLeft(context, movingObj, -distance);
}
}
public void Move(ICollisionEngineContext context, TimeSpan elspsedTime)
{
var leftMovingObjects = new List <IMovableObject>();
var rightMovingObjects = new List <IMovableObject>();
var upMovingObjects = new List <IMovableObject>();
var downMovingObjects = new List <IMovableObject>();
foreach (var entity in context.GetMovableObjects())
{
if (entity.Velocity.X < 0)
{
leftMovingObjects.Add(entity);
}
else if (entity.Velocity.X > 0)
{
rightMovingObjects.Add(entity);
}
if (entity.Velocity.Y < 0)
{
upMovingObjects.Add(entity);
}
else if (entity.Velocity.Y > 0)
{
downMovingObjects.Add(entity);
}
}
leftMovingObjects = leftMovingObjects.OrderBy(entity => entity.Position.X).ToList();
rightMovingObjects = rightMovingObjects.OrderByDescending(entity => entity.Position.X).ToList();
upMovingObjects = upMovingObjects.OrderBy(entity => entity.Position.Y).ToList();
downMovingObjects = downMovingObjects.OrderByDescending(entity => entity.Position.Y).ToList();
foreach (var entity in leftMovingObjects)
{
MoveLeft(context, entity, (int)(-entity.Velocity.X * elspsedTime.TotalSeconds));
}
foreach (var entity in rightMovingObjects)
{
MoveRight(context, entity, (int)(entity.Velocity.X * elspsedTime.TotalSeconds));
}
foreach (var entity in upMovingObjects)
{
MoveUp(context, entity, (int)(-entity.Velocity.Y * elspsedTime.TotalSeconds));
}
foreach (var entity in downMovingObjects)
{
MoveDown(context, entity, (int)(entity.Velocity.Y * elspsedTime.TotalSeconds));
}
}
public void Move(ICollisionEngineContext context, IMovableObject movingObj, IntVector offset)
{
MoveHorizontal(context, movingObj, offset.X);
MoveVertical(context, movingObj, offset.Y);
}