Function updateGlobals

js/script.js:1216–1234

(timeStep, lag)

// Extracted function to keep `update()` optimized
function updateGlobals(timeStep, lag) {
	currentFrame++;

	// Always try to fade out speed bar
	if (!isUpdatingSpeed) {
		speedBarOpacity -= lag / 30; // half a second
		if (speedBarOpacity < 0) {
			speedBarOpacity = 0;
		}
	}

	// auto launch shells
	if (store.state.config.autoLaunch) {
		autoLaunchTime -= timeStep;
		if (autoLaunchTime <= 0) {
			autoLaunchTime = startSequence() * 1.25;
		}
	}
}

//帧绘制回调
function update(frameTime, lag) {