C# Unity3D-在2.5D跑步游戏中，让角色在跷跷板上顺利前进

我想做的是在Unity中制作一个2.5D跑步者游戏，角色的所有三个旋转轴都被冻结，Z轴上的位置也被冻结。我不知道如何让角色在跷跷板上顺利前进。（我使用HingeJoint创建跷跷板。）

我使用Physics.Raycast（）函数创建了一个结构来检测CapsuleColleder的状态，效果很好

 private struct ColliderStatus
    {
        public bool headed;  //colliding up
        public bool footed;  //colliding down
        public bool onPlane; //colliding down && the obstacle colliding does not have slope angle
        public bool lefted;  //colliding left
        public bool righted; //colliding right
        public bool inAir;   //not colliding anything
    }

我试过以下方法：

对刚体施加力使其向前移动

//To move character rigidbody move forward automatically in runner game 
//when the speed is lower than the minimum speed and it's on plane or in air.
if (rigidbody.velocity.x < minForwardSpeed && (colliderStatus.onPlane || colliderStatus.inAir))
{
    rigidbody.AddForce(20f * Vector3.right);
}

//Add gravity to player
Vector3 gravityForce = new Vector3(0f, -gravityOnPlayer, 0f);
rigidbody.AddForce(gravityForce);

我不知道为什么我不能这样写，因为这会导致速度反应不正确：

    //Use transform.Translate() to move forward
    if (!colliderStatus.righted && rigidbody.velocity.x < minForwardSpeed)
    {
         transform.Translate(new Vector2(minForwardSpeed, 0f) * Time.deltaTime);
    }

然后我通过计算坡度向量上的重力投影来添加重力：

    private void AddGravity()
    {
    Vector3 gravityForce = new Vector3(0f, -gravityOnPlayer, 0f);
    //my character could be collided by the long vertical wall(colliderStatus.righted)
    //so I set the condition as "!colliderStatus.footed"
    //otherwise, I would use "colliderStatus.inAir"
    if (!colliderStatus.footed)
    {
        gravityForce = new Vector3(0f, -gravityOnPlayer, 0f);
    }
    else
    {
        gravityForce = Vector3.Project(Vector3.down * gravityOnPlayer, SlopeAngleVector());
    }
    rigidbody.AddForce(gravityForce);
    }

现在我的角色可以从跷跷板上滑下来，但它会一直向后。当在低坡度的跷跷板上时，它无法通过

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如何在跷跷板上为跑步者制作一个好的行为脚本？

我建议查看一些Unity standard asset角色控制器，我相信它们在角色移动时会考虑坡度。它可能会给你一些想法

我还建议修改代码计算坡度角度的方式。光线投射命中将返回曲面法线，然后您应该能够使用矢量3.Cross来计算坡度的角度

它类似于：Vector3.Cross（法线，（指向远离屏幕的向量））

您可能需要调整它以使其正常工作，但这可以在一个光线投射中为您提供坡度角度。它还可以消除你的位置在跷跷板下方的潜在问题

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作为一般提示，尽量不要将变换和刚体内容混合在一起，如果要移动刚体，请直接移动刚体，而不是通过变换间接移动刚体

你试过改变速度而不是增加力吗？

    private Vector3 SlopeAngleVector()
    {
    Vector3 nextStepPositon = new Vector3(transform.position.x + 0.01f, transform.position.y, 0f);
    Ray nextPosRay = new Ray(nextStepPositon, Vector3.down);
    Ray nowPosRay = new Ray(transform.position, Vector3.down);
    RaycastHit nextPosHit;
    RaycastHit nowPosHit;
    Vector3 slopeAngle = Vector3.zero;

    Physics.Raycast(nowPosRay, out nowPosHit, 5f, obstaclesLayerMask);
    if (Physics.Raycast(nextPosRay, out nextPosHit, 5f, obstaclesLayerMask))
    {
        slopeAngle = new Vector3(nextPosHit.point.x - nowPosHit.point.x, nextPosHit.point.y - nowPosHit.point.y, 0f).normalized;
    }
    return slopeAngle;
    }

    private void AddGravity()
    {
    Vector3 gravityForce = new Vector3(0f, -gravityOnPlayer, 0f);
    //my character could be collided by the long vertical wall(colliderStatus.righted)
    //so I set the condition as "!colliderStatus.footed"
    //otherwise, I would use "colliderStatus.inAir"
    if (!colliderStatus.footed)
    {
        gravityForce = new Vector3(0f, -gravityOnPlayer, 0f);
    }
    else
    {
        gravityForce = Vector3.Project(Vector3.down * gravityOnPlayer, SlopeAngleVector());
    }
    rigidbody.AddForce(gravityForce);
    }