Unity相机平滑/缓和拖动

Question

I\xc2\xb4m 尝试在拖动相机时进行缓动或惯性，以便当我放下相机时它会缓动到位。我想根据我抛出/拖动相机的力来移动相机。

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这是 i\xc2\xb4m 用于拖动相机的实际代码，但其中没有平滑的缓动。

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    using UnityEngine;\n    using System.Collections;\n\n    public class swipeCamera: MonoBehaviour\n    {\n        Vector3 hit_position = Vector3.zero;\n        Vector3 current_position = Vector3.zero;\n        Vector3 camera_position = Vector3.zero;\n        float z = 0.0f;\n\n        // Use this for initialization\n        void Start()\n        {\n        }\n\n        void Update()\n        {\n            if (Input.GetMouseButtonDown(0))\n            {\n                hit_position = Input.mousePosition;\n                camera_position = transform.position;\n\n            }\n            if (Input.GetMouseButton(0))\n            {\n                current_position = Input.mousePosition;\n                LeftMouseDrag();\n            }\n        }\n\n        void LeftMouseDrag()\n        {\n            // From the Unity3D docs: "The z position is in world units from the camera."  In my case I\'m using the y-axis as height\n            // with my camera facing back down the y-axis.  You can ignore this when the camera is orthograhic.\n            current_position.z = hit_position.z = camera_position.y;\n\n            // Get direction of movement.  (Note: Don\'t normalize, the magnitude of change is going to be Vector3.Distance(current_position-hit_position)\n            // anyways.  \n            Vector3 direction = Camera.main.ScreenToWorldPoint(current_position) - Camera.main.ScreenToWorldPoint(hit_position);\n\n            // Invert direction to that terrain appears to move with the mouse.\n            direction = direction * -1;\n\n            Vector3 position = camera_position + direction;\n\n            transform.position = position;\n        }\n    }\n

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谢谢你！

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Answer 1

放松意味着随着时间的推移逐渐移动。

因此，此类行为通常使用Vector.MoveTowards或其他 lerp 函数以及方法中的Time.deltaTimeUpdate来实现。

using UnityEngine;
using System.Collections;

public class swipeCamera: MonoBehaviour
{
    public float speed = 2.0f;//easing speed

    Vector3 hit_position = Vector3.zero;
    Vector3 current_position = Vector3.zero;
    Vector3 camera_position = Vector3.zero;
    float z = 0.0f;

    bool flag = false;
    Vector3 target_position;

    void Start()
    {
    }

    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            hit_position = Input.mousePosition;
            camera_position = transform.position;
        }

        if (Input.GetMouseButton(0))
        {
            current_position = Input.mousePosition;
            LeftMouseDrag();
            flag = true;
        }
        
        if(flag)
        {
            transform.position = Vector3.MoveTowards(transform.position, target_position, Time.deltaTime*speed);
            if(transform.position == target_position)//reached?
            {
                flag = false;// stop moving
            }
        }
    }

    void LeftMouseDrag()
    {
        // From the Unity3D docs: "The z position is in world units from the camera."  In my case I'm using the y-axis as height
        // with my camera facing back down the y-axis.  You can ignore this when the camera is orthograhic.
        current_position.z = hit_position.z = camera_position.y;

        // Get direction of movement.  (Note: Don't normalize, the magnitude of change is going to be Vector3.Distance(current_position-hit_position)
        // anyways.  
        Vector3 direction = Camera.main.ScreenToWorldPoint(current_position) - Camera.main.ScreenToWorldPoint(hit_position);

        // Invert direction to that terrain appears to move with the mouse.
        direction = direction * -1;

        target_position = camera_position + direction;
    }
}