protected override void Update(GameTime gameTime)
{
base.Update(gameTime);
//Get input
HandleInput(gameTime);
//Get time of first frame
if (startTime == -1)
{
startTime = (int)gameTime.TotalGameTime.TotalSeconds;
}
//Countdown
countdown = startTime + TrafficGame.Duration - (int)gameTime.TotalGameTime.TotalSeconds;
countdownUI.Update(countdown);
if (countdown == -3)
{
EndGame();
}
//Detect if in target lane
int lane = Road.GetLane(player.Position.X, 0.35f);
inTargetLane = lane == environment.road.GetHighlightAtPlayerPos();
environment.road.SetHighlightStatus(lane);
//Step forward time (slo-mo if player crashed or countdown finished)
float timeScale = 1.0f;
if (player.crashed || countdown <= 0)
{
timeScale = 0.25f;
}
world.Step((float)gameTime.ElapsedGameTime.TotalSeconds * timeScale);
if (state == GameState.RUNNING)
{
if (!player.crashed)
{
//Minimum of 1 point per frame.
//Score based on velocity, double points if in correct lane
//TODO: For low velocities, we may want less than 1 point per frame.
int deltaScore = (int)Math.Max(1, (player.Velocity.Y * gameTime.ElapsedGameTime.TotalSeconds));
if (inTargetLane)
{
deltaScore *= 2;
}
score += deltaScore;
}
}
else if (state == GameState.STARTING)
{
Camera.main.Zoom = Math.Min(1, Camera.main.Zoom + 0.05f); //Zoom out camera to normal position
if (gameTime.TotalGameTime.TotalSeconds - stateChangeTime > 3) //Start game after 3 seconds
{
state = GameState.RUNNING;
stateChangeTime = gameTime.TotalGameTime.TotalSeconds;
player.Velocity = new Vector2(player.Velocity.X, adjustedSpeed);
}
}
else if (state == GameState.RESTARTING)
{
Camera.main.Zoom = Math.Max(0, Camera.main.Zoom - 0.05f); //Zoom camera in as a transition
if (gameTime.TotalGameTime.TotalSeconds - stateChangeTime > 1) //Reset world after 1 second
{
state = GameState.STARTING;
stateChangeTime = gameTime.TotalGameTime.TotalSeconds;
environment.Reset();
trafficManager.Reset();
player.Reset();
score = 0;
}
}
//Update game stuff
trafficManager.Update(gameTime, player, state);
environment.Update(gameTime, player);
player.Update(gameTime, InputManager.LateralMovement);
//Light & camera follow player
Camera.main.Target = new Vector2(player.Position.X, player.Position.Y);
Lighting.Position = new Vector3(Lighting.Position.X, player.Position.Y + 15, Lighting.Position.Z);
//Update GUI
scoreUI.Update(gameTime, score);
fpsUI.Update(gameTime);
titleUI.Update(gameTime);
}
