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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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using UnityEngine.EventSystems;
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public class CameraOp : MonoBehaviour, IBeginDragHandler, IDragHandler,IPointerDownHandler
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{
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public Transform tagertTrns;
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public Camera mainCamera;
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public float scaleSpeed = 0.5f;
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public float rotateSpeed = 0.05f;
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public float moveSpeed = 0.01f;
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// Start is called before the first frame update
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void Start()
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{
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}
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// Update is called once per frame
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void Update()
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{
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float offset = Input.GetAxis("Mouse ScrollWheel");
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if (Input.GetAxis("Mouse ScrollWheel") != 0)
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{
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Debug.Log("ScrollWheel<0");
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float scale = Input.GetAxis("Mouse ScrollWheel")*scaleSpeed;
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// float z = mainCamera.transform.position.z + scale;
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//z = Mathf.Clamp(z, 1.52f, 3.3f);
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mainCamera.transform.position += mainCamera.transform.forward*scale;
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//tagertTrns.transform.localScale = new Vector3(scale, scale, scale);
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}
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}
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private Vector2 startPostion;
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public void OnBeginDrag(PointerEventData eventData)
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{
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startPostion = eventData.position;
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}
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public void OnDrag(PointerEventData eventData)
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{
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if (eventData.button == PointerEventData.InputButton.Left)
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{
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tagertTrns.Rotate(new Vector3(0, -eventData.delta.x, 0) * rotateSpeed, Space.World);
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//mainCamera.transform.RotateAround(tagertTrns.position, Vector3.up, eventData.delta.x * rotateSpeed);
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mainCamera.transform.RotateAround(tagertTrns.position, Vector3.right, -eventData.delta.y * rotateSpeed);
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}
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else if (eventData.button == PointerEventData.InputButton.Right)
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{
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mainCamera.transform.position += new Vector3(-eventData.delta.x, -eventData.delta.y, 0) * moveSpeed;
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}
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}
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//data是鼠标在rawImage上交互的PointEventData数据
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//rectTransform是RenderTexture所在的rawImage的RectTransform
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//rtCamera是渲染3D模型的摄像机
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//返回的obj就是轮胎，窗、门等物体
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public GameObject GetHitObj(PointerEventData data)
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{
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GameObject obj = null;
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var rect= this.gameObject.GetComponent<RectTransform>();
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var pos = (data.position - (Vector2)rect.position) / rect.lossyScale - rect.rect.position;
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var rate = pos / rect.rect.size;
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var ray = mainCamera.ViewportPointToRay(rate);
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RaycastHit raycastHit;
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if (Physics.Raycast(ray, out raycastHit))
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{
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Debug.Log(raycastHit.transform.name);
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obj = raycastHit.transform.gameObject;
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}
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Debug.DrawRay(mainCamera.transform.position, ray.direction,Color.red);
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return obj;
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}
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public void OnPointerDown(PointerEventData eventData)
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{
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// GetHitObj(eventData);
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}
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}
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