/// <summary>
/// Renders model.
/// </summary>
/// <param name="spriteBatch">Object for performing drawing actions.</param>
public void Render(SpriteBatch spriteBatch)
{
var bodyTexture = _textureStorage.TankBodyTexture;
var turretTexture = _textureStorage.TankTurretTexture;
var bodyTextureCenter = new Vector2(bodyTexture.Width / 2, bodyTexture.Height / 2);
var turretTexturePivot = new Vector2(22, 20); // TODO: Get it from model config.
var bodyPosition = _tank.Position;
var turretPivotPosition = bodyPosition.MovedByVector(VectorD.Polar(-10.0, _tank.Heading));
spriteBatch.Draw(bodyTexture, (Vector2)bodyPosition, null, Color.White,
(float)_tank.Heading, bodyTextureCenter, 1f, SpriteEffects.None, 0f);
spriteBatch.Draw(turretTexture, (Vector2)turretPivotPosition, null, Color.White,
(float)_tank.TurretHeading, turretTexturePivot, 1f, SpriteEffects.None, 0f);
}
public void UpdatePosition(TimeSpan timeDelta)
{
double time = timeDelta.TotalSeconds;
Position = Position.MovedByVector(VectorD.Polar(Speed * time, Heading));
Speed += Acceleration * time;
double turn = TurnSpeed * time;
Heading += turn;
TurretHeading += turn;
// Calculate turret heading:
double targetTurretHeading = VectorD.Cartesian(_target.X - Position.X, _target.Y - Position.Y).Heading;
double turretHeadingDelta = targetTurretHeading - TurretHeading;
double turretHeadingChange = Math.Sign(turretHeadingDelta) *
Math.Min(Math.Abs(turretHeadingDelta), TurretTurnSpeedConstant);
TurretHeading += turretHeadingChange;
}
