 <p>This is <strong>placement new</strong> syntax. It constructs an object of type <code>FBatchedLine</code> at the memory pointed to by <code>BatchedLines</code> with the constructor arguments <code>(Start, End, Color, LifeTime, Thickness, DepthPriority)</code>. After the call, <code>BatchedLines</code> can be used to reference the constructed object.</p> <p>Informally, you could imagine invoking the constructor with <code>BatchedLines</code> being <code>this</code>.</p>