public async Task UpdateViewAsync(Engine engine, EngineInput input, CancellationToken token)
{
// Re-sync the screen
bool forceRefresh = await SyncScreenDimensionsAsync() || input == EngineInput.RefreshView;
// Process input to re-center map
switch (input)
{
case EngineInput.ModifiedDirectionUp:
case EngineInput.ModifiedDirectionUpRight:
case EngineInput.ModifiedDirectionRight:
case EngineInput.ModifiedDirectionDownRight:
case EngineInput.ModifiedDirectionDown:
case EngineInput.ModifiedDirectionDownLeft:
case EngineInput.ModifiedDirectionLeft:
case EngineInput.ModifiedDirectionUpLeft:
MoveMapCamera((Direction)((int)input - (int)EngineInput.ModifiedDirectionUp));
break;
case EngineInput.ModifiedDirectionCenter:
CenterMapCamera(engine.Game.Player.X, engine.Game.Player.Y);
break;
}
// Move camera to keep player on screen
var playerBounds = MapWindow.Shift(MapCameraXOffset, MapCameraYOffset).ResizeFromCenter(-1);
if (playerBounds.GetRectPart(engine.Game.Player.X, engine.Game.Player.Y) != RectPart.Inside)
{
// TODO: Centering on player is aggressive but fine for now, replace with smoother pan
CenterMapCamera(engine.Game.Player.X, engine.Game.Player.Y);
}
if (forceRefresh)
{
await ClearScreenAsync();
}
foreach ((int screenX, int screenY) in GetScreenCoordinatesEnumerable())
{
T?oldTile = TileBuffer[screenX, screenY];
T?newTile = null;
if (MapWindow.Contains(screenX, screenY))
{
// Get map tile
int mapX = screenX - MapWindow.X + MapCameraXOffset;
int mapY = screenY - MapWindow.Y + MapCameraYOffset;
newTile = engine.Game.WorldMap.Contains(mapX, mapY) ? GetMapTile(engine.Game.WorldMap[mapX, mapY], engine.Game.Creatures[mapX, mapY]?.Type) : null;
}
if (forceRefresh || (oldTile is not null && !oldTile.Equals(newTile)) || (newTile is not null && !newTile.Equals(oldTile)))
{
TileBuffer[screenX, screenY] = newTile;
await DrawScreenTileAsync(screenX, screenY);
}
}
}
