化石原创文章,转载请注明来源并保留原文链接
Orbit Camera在观察物体,比如模型观察器中使用,这种camera总是以一个模型为目标,观察点围绕该目标,实现:
1、相机远近操控
2、相机水平旋转操控
3、相机垂直方向抬高、压低
总之,这种相机模型还是非常常用的。下面是代码:
using UnityEngine;
using System.Collections;
public class OrbitCamera : 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;
public float mouseTranslateSpeed = 20;
float x = 0.0f;
float y = 0.0f;
void Start()
{
Vector3 angles = transform.eulerAngles;
x = angles.y;
y = angles.x;
Quaternion rotation = Quaternion.Euler(y, x, 0);
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.position = position;
}
void LateUpdate()
{
distance = Mathf.Clamp(distance - Input.GetAxis("Mouse ScrollWheel") * mouseTranslateSpeed, distanceMin, distanceMax);
if (Input.GetMouseButton(0) && 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);
transform.rotation = rotation;
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.position = position;
}
public static float ClampAngle(float angle, float min, float max)
{
while(angle < -360f)
angle += 360F;
while(angle > 360f)
angle -= 360f;
return Mathf.Clamp(angle, min, max);
}
}
在Unity面板上出现的参数说明:
1、Target:相机观察目标
2、X Speed:鼠标水平移动控制相机旋转的速度,一般不用太大,个位数即可。
3、Y Speed:鼠标上下控制相机仰角的速度,100左右
4、Y Min (Max)Limit:鼠标仰角的最小最大值,-90到90
5、Distance Min:相机离开目标中心的最小距离
6、Distance Max: 相机离开目标中心的最大距离
7、Mouse Translate Speed:鼠标拉近拉远时的速度
化石原创文章,转载请注明来源并保留原文链接