한 오브젝트를 중심으로 orbit rotate 하기

1. using UnityEngine;
2. using UnityEngine;
3. using System.Collections;
5. public class DragMouseOrbit : MonoBehaviour
6. {
7. public Transform target;
8. public float distance = 2.0f;
9. public float xSpeed = 20.0f;
10. public float ySpeed = 20.0f;
11. public float yMinLimit = -90f;
12. public float yMaxLimit = 90f;
13. public float distanceMin = 10f;
14. public float distanceMax = 10f;
15. public float smoothTime = 2f;
16. float rotationYAxis = 0.0f;
17. float rotationXAxis = 0.0f;
18. float velocityX = 0.0f;
19. float velocityY = 0.0f;
20. // Use this for initialization
21. void Start()
22. {
23. Vector3 angles = transform.eulerAngles;
24. rotationYAxis = angles.y;
25. rotationXAxis = angles.x;
26. // Make the rigid body not change rotation
27. if (GetComponent<Rigidbody>())
28. {
29. GetComponent<Rigidbody>().freezeRotation = true;
30. }
31. }
32. void LateUpdate()
33. {
34. if (target)
35. {
36. if (Input.GetMouseButton(0))
37. {
38. velocityX += xSpeed * Input.GetAxis("Mouse X") * distance * 0.02f;
39. velocityY += ySpeed * Input.GetAxis("Mouse Y") * 0.02f;
40. }
41. rotationYAxis += velocityX;
42. rotationXAxis -= velocityY;
43. rotationXAxis = ClampAngle(rotationXAxis, yMinLimit, yMaxLimit);
44. Quaternion fromRotation = Quaternion.Euler(transform.rotation.eulerAngles.x, transform.rotation.eulerAngles.y, 0);
45. Quaternion toRotation = Quaternion.Euler(rotationXAxis, rotationYAxis, 0);
46. Quaternion rotation = toRotation;
48. //distance = Mathf.Clamp(distance - Input.GetAxis("Mouse ScrollWheel") * 5, distanceMin, distanceMax);
49. //RaycastHit hit;
50. //if (Physics.Linecast(target.position, transform.position, out hit))
51. //{
52. //distance -= hit.distance;
53. //}
54. //Vector3 negDistance = new Vector3(0.0f, 0.0f, -distance);
55. //Vector3 position = rotation * negDistance + target.position;
57. transform.rotation = rotation;
58. //transform.position = position;
59. velocityX = Mathf.Lerp(velocityX, 0, Time.deltaTime * smoothTime);
60. velocityY = Mathf.Lerp(velocityY, 0, Time.deltaTime * smoothTime);
61. }
62. }
63. public static float ClampAngle(float angle, float min, float max)
64. {
65. if (angle < -360F)
66. angle += 360F;
67. if (angle > 360F)
68. angle -= 360F;
69. return Mathf.Clamp(angle, min, max);
70. }
71. }

from https://answers.unity.com/questions/1257281/how-to-rotate-camera-orbit-around-a-game-object-on.html