cocos2dx 2.x 每帧渲染分析

1、java端

1、Cocos2dxRenderer类
	@Override
	public void onDrawFrame(final GL10 gl) {
		/*
		 * No need to use algorithm in default(60 FPS) situation,
		 * since onDrawFrame() was called by system 60 times per second by default.
		 */
		if (sAnimationInterval <= 1.0 / 60 * Cocos2dxRenderer.NANOSECONDSPERSECOND) {
			Cocos2dxRenderer.nativeRender();
		} else {
			final long now = System.nanoTime();
			final long remain = mLastTickInNanoSeconds + Cocos2dxRenderer.sAnimationInterval - now;
			if (remain > 0) {
				try {
					Thread.sleep(remain / Cocos2dxRenderer.NANOSECONDSPERMICROSECOND);
				} catch (final Exception e) {
				}
			}
			/*
			 * Render time MUST be counted in, or the FPS will slower than appointed.
			*/
			mLastTickInNanoSeconds = System.nanoTime();
			Cocos2dxRenderer.nativeRender(); //调用C++部分的函数
		}
	}1、Cocos2dxRenderer类
	@Override
	pu