private void DebugDrawSegment(SpriteBatch spriteBatch, ISnakeSegment segment)
{
var rotation = DirectionHelper.GetRotation(segment.Direction);
spriteBatch.DrawRectangle(segment.Bounds, Color.Red, 2);
spriteBatch.DrawLine(segment.Bounds.Center.ToVector2(), segment.Bounds.Width / 2f, rotation, Color.Red);
spriteBatch.DrawString(_graphicsSystem.DebugSpriteFont, segment.Position.ToString(), segment.Position, Color.Red);
}
private Vector2 CalculateScale(ISnakeSegment segment, TextureRegion2D selectedTexture)
{
Vector2 scale;
// Hack of scaling, for cases when TileWidth != TileHeight
if (segment.Direction == Direction.Right ||
segment.Direction == Direction.Left)
{
scale = new Vector2(segment.Size.Width / selectedTexture.Bounds.Width, segment.Size.Height / selectedTexture.Bounds.Height);
}
else
{
scale = new Vector2(segment.Size.Height / selectedTexture.Bounds.Height, segment.Size.Width / selectedTexture.Bounds.Width);
}
return(scale);
}
private TextureRegion2D SelectTexture(ISnakeSegment segment)
{
TextureRegion2D selectedTexture;
if (segment.Equals(_snake.Head))
{
selectedTexture = _graphicsSystem.TextureManager.TextureRegions["Head"];
}
else if (_snake.Tail.Any() && segment.Equals(_snake.Tail.Last()))
{
selectedTexture = _graphicsSystem.TextureManager.TextureRegions["Tail"];
}
else
{
selectedTexture = _graphicsSystem.TextureManager.TextureRegions["Part"];
}
return(selectedTexture);
}
private void DrawSegment(SpriteBatch spriteBatch, ISnakeSegment segment)
{
var selectedTexture = SelectTexture(segment);
var rotation = DirectionHelper.GetRotation(segment.Direction);
var origin = new Vector2(selectedTexture.Bounds.Width / 2f, selectedTexture.Bounds.Height / 2f);
var scale = CalculateScale(segment, selectedTexture);
spriteBatch.Draw(
texture: selectedTexture.Texture,
position: segment.Position,
sourceRectangle: selectedTexture.Bounds,
color: Color.White,
rotation: rotation,
scale: scale,
origin: origin,
effects: SpriteEffects.None,
layerDepth: LayerDepths.Snake
);
}