unity3D游戏开发之窗口剪裁.doc

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；文章来自【狗刨学习网】 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。1. public Transform readPlane; 2.3. public Transform bluePlane; 4.5. Bounds readBoundPlane; 6.7. Bounds blueBoundPlane; 8.9. Vector3 blueBoundMin; 10.11. Vector3 blueBoundMax; 12.13. Mesh mesh; 14.15. void Start() 16.17. mesh=readPlane.GetComponent().mesh; 18.19. Vector3 ve=mesh.vertices; 20.21. print(ve1+“”+ve3);/readPlane最左边两个点 22.23. blueBoundPlane=bluePlane.gameObject.collider.bounds; 24.25. blueBoundMin=blueBoundPlane.min; 26.27. blueBoundMax=blueBoundPlane.max; 28.29. print(blueBoundMin+“|”+blueBoundMax+“|”+blueBoundPlane.size+“|”+blueBoundPlane.center); 30.31. 32.33. void Update() 34.35. if(Input.GetMouseButton(0) 36.37. readBoundPlane=readPlane.GetComponent().bounds; 38.39. if(readBoundPlane.min.xblueBoundMin.x)/包围盒最小坐标x超出blue的最小坐标开始裁剪 40. Vector3 vec3=mesh.vertices; 41.42. 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 43.44. vec31=new Vector3(mesh.bounds.min.x-vec3local.x,vec31.y,vec31.z); 45.46. vec33=new Vector3(mesh.bounds.min.x-vec3local.x,vec33.y,vec33.z); 47.48. Vector2 uvs=new Vector2vec3.Length; 49.50. for(int i=0;ivec3.Length;i+) 51.52. if(i%2!=0) 53.54. uvs=new Vector2(readBoundPlane.min.x-blueBoundMin.x+readBoundPlane.size.x)/readBoundPlane.size.x,mesh.uv.y);/更新UV 55.56. else 57.58. uvs=new Vector2(mesh.uv.x,mesh.uv.y); 59.60. 61.62. 63.64. mesh.uv=uvs; 65.66. mesh.vertices=vec3; 67.68. if(readBoundPlane.max.x=blueBoundMin.x) 69.70. readPlane.GetComponent().enabled=false; 71.72. if(readBoundPlane.max.xblueBoundMin.x) 73.74. readPlane.GetComponent().enabled=true; 75.76. 77.78. float x=Input.GetAxis(“Mouse X”); 79.80. float y=Input.GetAxis(“Mouse Y”); 81.82. readPlane.position+=newVecto