Starting at the specified source index and pastes them to another 中的一系列元素,將它們粘貼到另一
This method takes the source index , an array of characters , the destination index , and the number of characters to copy 此方法帶有四個參數,即源索引、字符數組、目標索引和要復制的字符數。
This results in the vertex buffer you created earlier being bound to source index 0 , so any vertex element which is pulling its data from source index 0 will retrieve data from this buffer 上面代碼的執行結果就是把之前建造的頂點緩存榜定到更早之前創建的資源索引0上面,繼而這里所有的頂點元素都可以通過資源索引0來得到他們在緩存中的數據。