protected override void Update(GameTime gameTime)
{
var keyboard = Keyboard.GetState();
var gamePadState = GamePad.GetState(PlayerIndex.One);
if (gamePadState.Buttons.Back == ButtonState.Pressed || keyboard.IsKeyDown(Keys.Escape))
{
Exit();
}
// ReSharper disable once ForCanBeConvertedToForeach
for (var index = 0; index < _sprites.Length; index++)
{
var sprite = _sprites[index];
if (index % 2 == 0)
{
sprite.Rotation = (sprite.Rotation + MathHelper.ToRadians(0.5f)) % MathHelper.TwoPi;
}
else
{
sprite.Rotation = (sprite.Rotation - MathHelper.ToRadians(0.5f) + MathHelper.TwoPi) % MathHelper.TwoPi;
}
sprite.Color = ColorHelper.FromHsl(sprite.Rotation / MathHelper.TwoPi, 0.5f, 0.3f);
sprite.TransformMatrix = Matrix2D.CreateFrom(sprite.Position, sprite.Rotation, _spriteScale, _spriteOrigin);
_sprites[index] = sprite;
}
base.Update(gameTime);
}
/// <summary>
/// Draws unicode (UTF-16) characters as sprites using the specified <see cref="BitmapFont" />, text
/// <see cref="string" />, position <see cref="Vector2" /> and optional <see cref="Color" />, rotation
/// <see cref="float" />, origin <see cref="Vector2" />, scale <see cref="Vector2" /> <see cref="FlipFlags" />, and
/// depth <see cref="float" />.
/// </summary>
/// <param name="bitmapFont">The <see cref="BitmapFont" />.</param>
/// <param name="text">The text <see cref="string" />.</param>
/// <param name="position">The position <see cref="Vector2" />.</param>
/// <param name="color">
/// The <see cref="Color" />. Use <code>null</code> to use the default
/// <see cref="Color.White" />.
/// </param>
/// <param name="rotation">
/// The angle <see cref="float" /> (in radians) to rotate each sprite about its <paramref name="origin" />. The default
/// value is <code>0f</code>.
/// </param>
/// <param name="origin">
/// The origin <see cref="Vector2" />. Use <code>null</code> to use the default
/// <see cref="Vector2.Zero" />.
/// </param>
/// <param name="scale">
/// The scale <see cref="Vector2" />. Use <code>null</code> to use the default
/// <see cref="Vector2.One" />.
/// </param>
/// <param name="flags">The <see cref="FlipFlags" />. The default value is <see cref="FlipFlags.None" />.</param>
/// <param name="depth">The depth <see cref="float" />. The default value is <code>0f</code></param>
/// <exception cref="InvalidOperationException">The <see cref="Batcher{TDrawCallInfo}.Begin(ref Matrix, ref Matrix, BlendState, SamplerState, DepthStencilState, RasterizerState, Effect)" /> method has not been called.</exception>
/// <exception cref="ArgumentNullException"><paramref name="bitmapFont" /> is null or <paramref name="text" /> is null.</exception>
public void DrawString(BitmapFont bitmapFont, string text, Vector2 position, Color?color = null,
float rotation = 0f, Vector2?origin = null, Vector2?scale = null,
FlipFlags flags = FlipFlags.None, float depth = 0f)
{
Matrix2D matrix;
Matrix2D.CreateFrom(position, rotation, scale, origin, out matrix);
DrawString(bitmapFont, text, ref matrix, color, flags, depth);
}