Unity3D为什么将轴与SPEED相乘？

Question

Im pretty new in programming in Unity...

So my question is:

Why you multiply the

Input.GetAxis("VertOrHorz") * speed

with speed. Because I was used to move things with the += or -= operator.

Could anyone please do me a favour and explain it to me :).

Thanks in advance

Jakob

Answer 1

The Input.GetAxis function returns values from -1f to 1f or 0f to 1f . This value range is so little to the extent that it cannot move an Object.

For example, adding force to a Rigidbody with a value of 0.5f returned from Input.GetAxis wont be able to do anything.

By multiplying it with another number( speed ), you will be able to get a number big enough to actually move the Object.

If you are doing anything that requires a number between -1f to 1f or 0f to 1f , then you do not need to multiply the value from the Input.GetAxis function with any other number.