Unity3D 窗口裁剪

实现效果 拖动readplane 当包围盒最小点超出bluePlane的最小点时（仅做了左边裁剪），对超出部分裁剪，当全部超出隐藏readPlane 当readPlane包围盒的最大坐标点大于bluePlane的最小点时，显示readPlane；

阅读此文时，读者最好具备世界坐标 本地坐标 bounds 等之类的知识！

collider.bounds、render.bounds的min max是世界坐标，size是大小 mesh.bounds是本地坐标。mesh.vertices对线框顶点坐标更改本资源出处狗刨网。

1.

public Transform readPlane;

2. public Transform bluePlane;

3. Bounds readBoundPlane;

4. Bounds blueBoundPlane;

5. Vector3 blueBoundMin;

6. Vector3 blueBoundMax;

7. Mesh mesh;

8. void Start() {

9. mesh=readPlane.GetComponent().mesh;

10. Vector3[] ve=mesh.vertices;

11. print(ve[1]+“\\\\”+ve[3]);//readPlane最左边两个点

12. blueBoundPlane=bluePlane.gameObject.collider.bounds;

13. blueBoundMin=blueBoundPlane.min;

14. blueBoundMax=blueBoundPlane.max;

15. print(blueBoundMin+“||||”+blueBoundMax+“|||”+blueBoundPlane.size+“|||||”+blueBoundPlane.center);

16. }

17. void Update() {

18. if(Input.GetMouseButton(0)) {

19. readBoundPlane=readPlane.GetComponent().bounds;

20. if(readBoundPlane.min.x

21. Vector3[] vec3=mesh.vertices;

22. Vector3 vec3local=(readPlane.worldToLocalMatrix*new

Vector3(readBoundPlane.min.x-blueBoundMin.x,0,0));//因为 collider.bounds.min是世界坐标，mesh.vertices是本地坐标所以需要世界到本地的转化

23. vec3[1]=new

Vector3(mesh.bounds.min.x-vec3local.x,vec3[1].y,vec3[1].z);

24. vec3[3]=new

Vector3(mesh.bounds.min.x-vec3local.x,vec3[3].y,vec3[3].z);

25. Vector2[] uvs=new Vector2[vec3.Length];

26. for(int i=0;i27. if(i%2!=0) {

28. uvs=new Vector2(((readBoundPlane.min.x-

blueBoundMin.x+readBoundPlane.size.x)/readBoundPlane.size.x,mesh.uv.y); //更新UV

29. } else {

30. uvs=new Vector2(mesh.uv.x,mesh.uv.y);

31. }

32. }

33. mesh.uv=uvs;

34. mesh.vertices=vec3;

35. }

if(readBoundPlane.max.x<=blueBoundMin.x) {

36. readPlane.GetComponent().enabled=false;

37. }

if(readBoundPlane.max.x>blueBoundMin.x) {

38. readPlane.GetComponent().enabled=true;

39. }

40. float x=Input.GetAxis(“Mouse X”);

41. float y=Input.GetAxis(“Mouse Y”);

42. readPlane.position+=new Vector3(x,y,0);

43. }

44. }