在C＃unity中将速度添加到2d精灵

Question

hi i was wondering if someone could help me fix practice code (i make practice codes before i make the real thing because its just how i roll) it is basically an object that requires the user to click on the screen in order for it to not touch the ground much like flappy bird however although i have applied gravity correctly to the sprite i cannot fix the velocity section (i coded is to every time the user clicks with his mouse or taps the space key the object will move up like flappy bird)

using UnityEngine;
using System.Collections;

public class BirdMovment : MonoBehaviour {

    Vector3 Velocity = Vector3.zero;
    public Vector3 gravity;
    public Vector3 flapVelocity;
    public float maxSpeed = 5f; 

    bool didFlap = false;

    // Use this for initialization
    void Start () {

    }

    void update (){
        if (Input.GetKeyDown (KeyCode.Mouse0)) 
        {
            didFlap = true; 
        }
    }

    // Update is called once per frame
    void FixedUpdate () {
        Velocity += gravity* Time.deltaTime;

        if (didFlap) {
            didFlap = false;
            Velocity += flapVelocity;

        }
        Velocity = Vector3.ClampMagnitude (Velocity, maxSpeed);

        transform.position += Velocity * Time.deltaTime;
    }
}

can you please fix the error as every time i set the velocity in unity for the sprite ad run the program the sprite just keeps on falling and no matter how much i click or tap the space key the sprite does not stop falling even if i increase the velocity

Answer 1

First of all, the correct Update function is with a capital U, so Update() instead of update() . Then, since you're not doing anything with physics, you can do everything in Update and not use FixedUpdate at all. So you can remove the didFlap variable and add to Velocity directly inside the if (Input.GetKeyDown ...) block. Furthermore, regarding gravity, you're multiplying it twice with Time.deltaTime there, so remove the first one. That should get you started.