Added an explicit mode (mExplicitMode) and explicit vertices array (mExplicitVerts) to SpriteBatchItem. You can still create a SpriteBatchItem using the old system, where the render OOBB is calculated as a standard quad based on the mSize property. The new option allows you to call SpriteBatch::createSprite(Vector2* verts), which will set the explicit vertices of the SpriteBatchItem. This still needs some testing, but for now the backwards compatibility is functioning.