render method

@override void render(Canvas canvas)

Implement this method to render the current game state in the canvas.

Implementation

@override
void render(Canvas canvas) {
  for (final entity in entities) {
    final position = entity.get<PositionComponent>()!;
    final size = entity.get<SizeComponent>()!.size;
    final anchor = entity.get<AnchorComponent>()?.anchor ?? Anchor.topLeft;
    final angle = entity.get<AngleComponent>()?.radians ?? 0;
    final flip = entity.get<FlipComponent>();

    canvas
      ..save()
      ..translate(position.x, position.y)
      ..rotate(angle);

    final delta = -anchor.toVector2()
      ..multiply(size);
    canvas.translate(delta.x, delta.y);

    // Handle inverted rendering by moving center and flipping.
    if (flip != null && (flip.flipX || flip.flipY)) {
      canvas.translate(size.x / 2, size.y / 2);
      canvas.scale(flip.flipX ? -1.0 : 1.0, flip.flipY ? -1.0 : 1.0);
      canvas.translate(-size.x / 2, -size.y / 2);
    }
    renderEntity(canvas, entity);

    canvas.restore();
  }
}