使用自定义力量进行弹丸射击

Question

I have made a projectile shooting system. I want to shoot an object from position A to B following an indicated path. Everything is working fine except for one thing. The velocity applied on the object is calculated based on the distance between A and B, the value of time is 1 to travel this distance. Meaning that the farther I hit, the quicker it goes. I want to have control of the force applied. Meaning that it should go with my set speed whether I hit near or far. Tried normalizing the velocity and multiplied it by my custom force value, but then it moves away from its trajectory. (See this link below, no matter how close or far we hit the object. It goes with the same speed while following the trajectory indicated. I want to develop this functionality. https://play.google.com/store/apps/details?id=com.ghakilo.trickytrack )

Vector3 calculateVelocity(Vector3 target, Vector3 origin, float time)
 {
     Vector3 distance = target - origin;
     Vector3 distanceXZ = distance;
     distanceXZ.y = 0f;

     float Sy = distance.y;
     float Sxz = distanceXZ.magnitude;
     float Vxz = Sxz / time;
     float Vy = 0f;
     
     Vy = Sy / time + 0.5f * Mathf.Abs(Physics.gravity.y) * time;
    
     Vector3 result = distanceXZ.normalized;
     result = result * Vxz;
     result.y = Vy;

     return result;
 }

Answer 1

Physics time!

Velocity is a vector whose magnitude is speed.

If you want to fix the speed at which your projectile starts, that only leaves the direction of the velocity in your hands, so you need to calculate the direction in which you want to yeet your projectile.

If you're like me, you shoot straight at the target, so you'd set the direction vector to go from the origin to the target. Which is simply target - origin , or what you calculate as distance . I'm going to call this direction because that's what it really is being used for.

Now to use this as the direction vector for your velocity, convert distance to a unit vector (not sure how you do this in the unity framework, but direction.Normalize() ?)

Then multiply this by the speed to get your velocity vector!

Vector3 calculateVelocity(Vector3 target, Vector3 origin, float speed)
 {
     Vector3 direction = target - origin;
     direction.Normalize();

     Vector3 result = direction * speed;

     return result;
 }

Answer 2

First add rigidbody to your bullet and set the gravity scale to.5

and add this code to your bullet prefab

Vector3 calculateVelocity(Transform target, Transform origin, float time)
    {
        Vector3 direction = target.transform.position - origin.transform.position;
        float distance = Vector3.Distance(origin.transform.position, target.transform.position);
        result = direction.normalized * distance * speed * Time.deltaTime;
        return result;
    }