MonoBehaviour.FixedUpdate 固定更新

function?FixedUpdate?() : void

Description描述

This function is called every fixed framerate frame, if the MonoBehaviour is enabled.

當MonoBehaviour啟用時，其?FixedUpdate?在每一幀被調用。

FixedUpdate should be used instead of Update when dealing with?Rigidbody?. For example when adding a force to a rigidbody, you have to apply the force every fixed frame inside FixedUpdate instead of every frame inside Update.

處理Rigidbody時，需要用FixedUpdate代替Update。例如:給剛體加一個作用力時，你必須應用作用力在FixedUpdate里的固定幀，而不是Update中的幀。(兩者幀長不同)

// Apply a upwards force to the rigid body every frame
// 每幀應用一個向上的力到剛體上
function FixedUpdate () {rigidbody.AddForce ( Vector3.up );
}

In order to get the elapsed time since last call to FixedUpdate, use?Time.deltaTime?This function is only called if the?Behaviour?is enabled. Override this function in order to provide your component's functionality.

為了獲取自最后一次調用FixedUpdate所用的時間，可以用Time.deltaTime。這個函數只有在Behaviour啟用時被調用。實現組件功能時重載這個函數。