// TODO: make it FillCircle ()
public void CutCircle(Vector2 center, float radius, IEnumerable <Collider2D> affectedColliders = null)
{
if (affectedColliders == null)
{
affectedColliders = Physics2D.OverlapCircleAll(center, radius);
}
var affectedSpriteRenderers = new HashSet <SpriteRenderer> ();
foreach (var affectedCollider in affectedColliders)
{
SpriteRenderer spriteRenderer;
if (colliderSpriteMap.TryGetValue(affectedCollider, out spriteRenderer))
{
affectedSpriteRenderers.Add(spriteRenderer);
}
}
foreach (var spriteRenderer in affectedSpriteRenderers)
{
if (RasterHelper.CutCircle(spriteRenderer, center, radius))
{
UpdateSpriteColliders(spriteRenderer);
}
}
}
// TODO: make it FillCircle ()
public static bool CutCircle(SpriteRenderer spriteRenderer, Vector2 center, float radius)
{
var tf = spriteRenderer.transform;
center = tf.InverseTransformPoint(center);
var localScaleVector = tf.InverseTransformPoint(tf.position + Vector3.right);
var worldToLocalScale = localScaleVector.magnitude;
radius *= worldToLocalScale;
var sprite = spriteRenderer.sprite;
int pixelX, pixelY;
RasterHelper.SpriteCoordsToPixelCoords(sprite, center, out pixelX, out pixelY);
float pixelsPerUnit = RasterHelper.GetPixelsPerUnit(sprite);
int pixelRadius = Mathf.RoundToInt(radius * pixelsPerUnit);
return(RasterHelper.CutCircle(sprite.texture, pixelX, pixelY, pixelRadius));
}