public TrackScreen(Background background, Vector2 startPos, ContentManager content, EventHandler screenEvent)
: base(screenEvent)
{
carBasicTex = content.Load<Texture2D>("Cars//redcar");
hudFont = content.Load<SpriteFont>("Fonts//hudFont");
countdownFont = content.Load<SpriteFont>("Fonts//countdownFont");
winnerFont = content.Load<SpriteFont>("Fonts//winnerFont");
this.startPos = startPos;
this.background = background;
carBasic = new CarBasic(new Vector2(startPos.X, startPos.Y + 15), carBasicTex);
aiCar = new AICarBasic(new Vector2(startPos.X, startPos.Y - 15), carBasicTex);
}
public static void AICarSteer(AICarBasic car, Background track)
{
Matrix transformCarToTrack = car.transformMatrix * Matrix.Invert(track.transformMatrix);
Vector2 positionInBL = Vector2.Transform(new Vector2(-10, -car.Height * 2), transformCarToTrack);
Vector2 positionInBR = Vector2.Transform(new Vector2(car.Width + 10, -car.Height * 2), transformCarToTrack);
int xL = (int)Math.Round(positionInBL.X);
int yL = (int)Math.Round(positionInBL.Y);
int xR = (int)Math.Round(positionInBR.X);
int yR = (int)Math.Round(positionInBR.Y);
Color colorRight = track.colorData[xR + yR * track.Width];
Color colorLeft = track.colorData[xL + yL * track.Width];
Color colorGrass = new Color(24, 199, 42); // Color of grass
if ((colorRight == colorGrass && colorLeft == colorGrass) ||
(colorLeft != colorGrass && colorRight == colorGrass))
car.rotation -= (2 * car.speed) / car.handling;
else if (colorLeft == colorGrass && colorRight != colorGrass)
car.rotation += (2 * car.speed) / car.handling;
}