我正在开发一款 RTS 游戏,希望支持摄像头在按下鼠标按钮时围绕当前屏幕中心旋转,就像在任何 RTS 策略游戏中一样。
我尝试了 unity wiki 上显示的 MouseOrbitImproved 脚本(复制在下方),但它需要相机使用的目标对象来旋转。我的问题是我的目标始终是屏幕的当前中心。
知道如何实现这一点,但只能在按下鼠标中键时实现吗?
using UnityEngine;
using System.Collections;
[AddComponentMenu("Camera-Control/Mouse Orbit with zoom")]
public class MouseOrbitImproved : MonoBehaviour {
public Transform target;
public float distance = 5.0f;
public float xSpeed = 120.0f;
public float ySpeed = 120.0f;
public float yMinLimit = -20f;
public float yMaxLimit = 80f;
public float distanceMin = .5f;
public float distanceMax = 15f;
private Rigidbody rigidbody;
float x = 0.0f;
float y = 0.0f;
// Use this for initialization
void Start ()
{
Vector3 angles = transform.eulerAngles;
x = angles.y;
y = angles.x;
rigidbody = GetComponent<Rigidbody>();
// Make the rigid body not change rotation
if (rigidbody != null)
{
rigidbody.freezeRotation = true;
}
}
void LateUpdate ()
{
if (target)
{
x += Input.GetAxis("Mouse X") * xSpeed * distance * 0.02f;
y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;
y = ClampAngle(y, yMinLimit, yMaxLimit);
Quaternion rotation = Quaternion.Euler(y, x, 0);
distance = Mathf.Clamp(distance - Input.GetAxis("Mouse ScrollWheel")*5, distanceMin, distanceMax);
RaycastHit hit;
if (Physics.Linecast (target.position, transform.position, out hit))
{
distance -= hit.distance;
}
Vector3 negDistance = new Vector3(0.0f, 0.0f, -distance);
Vector3 position = rotation * negDistance + target.position;
transform.rotation = rotation;
transform.position = position;
}
}
public static float ClampAngle(float angle, float min, float max)
{
if (angle < -360F)
angle += 360F;
if (angle > 360F)
angle -= 360F;
return Mathf.Clamp(angle, min, max);
}
}
最佳答案
在您的 orbit 函数中,您确定要环绕的物体,从屏幕中心转换一条射线并环绕碰撞:
public LayerMask groundLayerMask; // mask to choose orbitable layers
...
Ray screenRay = Camera.main.ScreenPointToRay(new Vector3(Screen.width/2f, Screen.height/2f, 0f));`
RaycastHit hitInfo;
Physics.Raycast(screenRay, out hitInfo, Mathf.Infinity, groundLayerMask.value);
Vector3 orbitPosition = hitInfo.point;
您可以使用 Input.GetMouseButton(2)
检查鼠标中键是否被按下。在绕行之前,检查它并仅在按住鼠标输入时检测鼠标输入变化。
在 MouseOrbitImproved
代码中,它在 LateUpdate
方法中可能看起来像这样:
void LateUpdate ()
{
// Skip mouse input here if middle mouse button is not pressed
if (Input.GetMouseButton(2))
{
x += Input.GetAxis("Mouse X") * xSpeed * distance * 0.02f;
y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02f;
y = ClampAngle(y, yMinLimit, yMaxLimit);
}
Quaternion rotation = Quaternion.Euler(y, x, 0);
distance = Mathf.Clamp(distance - Input.GetAxis("Mouse ScrollWheel")*5, distanceMin, distanceMax);
Ray screenRay = Camera.main.ScreenPointToRay(new Vector3(Screen.width/2f, Screen.height/2f, 0f));`
RaycastHit hitInfo;
Physics.Raycast(screenRay, out hitInfo, Mathf.Infinity, groundLayerMask.value);
Vector3 orbitPosition = hitInfo.point;
Vector3 negDistance = new Vector3(0.0f, 0.0f, -distance);
Vector3 position = rotation * negDistance + orbitPosition ;
transform.rotation = rotation;
transform.position = position;
}
在类字段中,删除 public Transform target;
并添加 public LayerMask groundLayerMask;
并在检查器中将其设置为仅与地面发生碰撞.
关于c# - Unity3d:按下鼠标中键围绕屏幕中心旋转相机,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56347447/