需要帮助使球体在抛物线中移动作为射弹模拟器的一部分吗?

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问题描述

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我目前正在从事一个学校计算机科学项目，我决定为此制作一个简单的弹丸模拟器，用户只需提供初始发射速度、发射角度和重力.到目前为止，我已经尝试制作一个脚本，使用这些值来计算轨迹模式并随时间改变球体在平面上的 y 和 z 位置.

Hi I'm currently working on a school computer science project for which I have decided to make a simple projectile simulator, where the user just provides the initial launch speed, the launch angle, and gravity. So far I've tried to make a script that uses these values to calculate a trajectory pattern and change the y and z position of a sphere across a plane over time.

public class SphereJump : MonoBehaviour{

    public float gravity = 9.8f;
    public float InitialSpeed = 10.0f;
    public float LaunchAngle = 45.0f;

    public Transform Sphere;

    void Start () {

        float InitialX = Mathf.Sin(LaunchAngle) * InitialSpeed;
        float InitialY = Mathf.Cos(LaunchAngle) * InitialSpeed;

        float Range = Mathf.Sin(2*LaunchAngle)*Mathf.Pow(InitialSpeed,2)/gravity;

        float MaxHeight = Mathf.Sin(LaunchAngle) * Mathf.Pow(InitialSpeed, 2) / 2 * gravity;

        float FlightTime = Range / InitialX;

        float ElapsedTime = 0;

        while (ElapsedTime < FlightTime)
        {
            float NewPositionX = transform.position.z+InitialX*ElapsedTime;
            float NewPositionY = transform.position.y +InitialY -gravity / 2*ElapsedTime;

            Sphere.Translate(0f, NewPositionY, NewPositionX);

            ElapsedTime += Time.deltaTime;
        }
    }

}

对 Unity 来说是全新的，在我看来，这在数学上应该是可行的，但是当我运行游戏时，要么什么也没发生，要么球体对象消失.一开始，它的位置是 (1, 0.5, 1) - 仅比它所在的平面高 0.5 - 据我所知，脚本已正确附加.还会出现一个警告说由于浮点精度限制......".使用 Vector3 会有帮助吗?我是否完全混淆了脚本?

Being completely new to Unity, in my head this should mathematically work, however when I run the game either nothing happens or the sphere object disappears. At the start it's position is (1, 0.5, 1) - which is just 0.5 above the plane it's sitting on - and as far as I'm aware the script is correctly attached. A warning also comes up saying "Due to floating point precision limitations...". Would using Vector3 help? Have I confused the script entirely?

推荐答案

这应该放在 Update() 中，您可以自己添加该方法并移动代码.

this should go in an Update() you can add that method yourself and move the code.

至于你的第二个问题:

矢量 3 是 3d 空间中一个点位置的坐标系，X、Y 和 Z！您将需要一个 z 坐标来表示深度，否则 unity 不知道将对象放在哪里

Vector 3 is a coordinate system for a point position in 3d space, X,Y and Z! you will need a z coordinate to denote depth, or unity dosnt know where to place your object

所以:

Vector3 newPos= new Vector3(x,y,z);

如果您不希望与相机的距离发生变化，z 可以保持不变.

z can remain constant if you dont want distance from the camera to vary.

Vector3 newPos= new Vector3(transform.position.z+InitialX*ElapsedTime,transform.position.y +InitialY -gravity / 2*ElapsedTime,z);

然而，

在 unity 中有一个叫做刚体的组件.将此附加到您的对象将增加重力和物理.

in unity there is a component called rigidbody. attaching this to your object will add gravity and physics.

然后您可以在脚本中获取刚体:

you can then get the rigidbody in script:

RigidBody body = this.GameObject.GetComponent();

那么你可以这样做:

body.AddForce(position,direction,force);

或 body.gravity=3;

或其他一些调整以融入您的物理挑战.

or several other adjustments to incorperate your physics challenge.

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