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);
}