Three.js中的相机位置优化策略

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资源摘要信息:"在这个文件中,我们将探讨如何在使用Three.js、JavaScript等技术构建的WebGL应用程序中优化相机位置。具体来说,我们将学习如何设置相机的位置,以便在用户调整浏览器窗口大小时,场景能够自动地完全充满整个浏览器视口。" 首先,我们需要了解Three.js是一种基于WebGL的JavaScript库,它简化了在网页上创建和显示3D图形的过程。在Three.js中,场景(scene)、相机(camera)和渲染器(renderer)是构成3D世界的基础元素。 相机在3D渲染中起着至关重要的作用。它定义了观众从哪个角度观看场景,就好比是真实世界中摄像机的角色。Three.js提供了多种类型的相机,其中最常用的是透视相机(PerspectiveCamera)和正交相机(OrthographicCamera)。 为了优化相机位置,需要考虑到场景的尺寸、相机的视场角(field of view,简称FOV)、以及渲染器的尺寸。透视相机的视场角决定了镜头的宽广程度,较高的FOV值意味着镜头更加宽广,能够捕捉到更多的场景,而较低的FOV值则相反。 在Three.js中,相机的位置和方向可以通过设置其position属性来调整。调整相机位置时,开发者需要考虑到相机与场景中对象之间的关系,以及如何在不同的视图中呈现这些对象。 优化相机位置的一个重要方面是响应式设计。当用户调整浏览器窗口大小时,应用程序应当能够适应不同的屏幕尺寸,保持场景内容始终充满视口。这涉及到事件监听和动态调整相机的位置和镜头参数。 JavaScript在这一过程中扮演了关键角色,因为它允许我们编写代码以在浏览器窗口大小改变时触发特定的函数。这些函数能够调整相机的属性,并且重新渲染场景以反映这些改变。 文件名称"optimize-camera-position-master"暗示了这是一个主文件或项目的主版本,可能包含了用于优化相机位置的核心功能和逻辑。这个文件可能包含了设置相机初始位置的函数、调整相机位置的函数、以及一个主函数或类,用来将这些功能集成到Three.js场景中。 在实际操作中,开发者会利用浏览器提供的resize事件来检测窗口大小的变化,并执行相应的函数来更新相机的位置。此外,Three.js提供了一些有用的对象,如OrbitControls,它允许用户通过鼠标操作来旋转、缩放和移动相机,从而探索场景。 总之,优化相机位置的关键在于确保相机能够以最佳的视角展现场景,同时在用户通过改变浏览器窗口大小时,场景的展示仍然保持最佳状态。这不仅涉及到技术实现,还涉及到用户体验的优化。开发者需要对Three.js的相机系统有深入的理解,并结合JavaScript来动态控制相机行为,以适应不同用户的显示需求。

优化下面代码.bg { width: 100%; height: 100vh; background-image: url('../../assets/img/info-bg.png'); background-size: 100% 100%; background-repeat: no-repeat; position: relative; font-family: AlibabaPuHuiTiR; .goBack { position: absolute; top: 34px; right: 65px; cursor: pointer; color: #ffffff; width: 181px; padding: 15px 10px; background: rgba(24, 31, 30, 0.52); border: 1px solid #4a524e; border-radius: 5px; font-size: 18px; font-family: AlibabaPuHuiTiR; z-index: 111; display: flex; flex-direction: row; justify-content: space-between; align-items: center; } .home-left { position: absolute; top: 18%; left: 40px; width: 41%; height: 76%; font-size: 24px; color: #ffffff; } .unit { font-size: 24px; color: #636363; } .home-left-title { font-size: 24px; color: #ffffff; line-height: 36px; } .home-right { position: absolute; top: 18%; right: 88px; width: 46%; height: 78%; } .model { display: flex; justify-content: center; align-items: center; height: 90%; } #threeContained { width: 100%; height: 100%; } .model-qk-img { width: 82%; height: 90%; background-image: url('../../assets/img/howo.png'); background-size: 100% 100%; background-repeat: no-repeat; } .model-zk-img { width: 56%; height: 90%; background-image: url('../../assets/img/heavyT.png'); background-size: 100% 100%; background-repeat: no-repeat; } .model-gj-img { width: 82%; height: 90%; background-image: url('../../assets/img/transit.png'); background-size: 100% 100%; background-repeat: no-repeat; } .car-online { margin-bottom: 50px; } } .day-data { display: flex; flex-direction: row; justify-content: space-between; align-items: center; height: 29%; margin-left: 30px; } .day-val { width: 40%; } .prefix { display: inline-block; width: 6px; height: 14px; background: #ffffff; margin-right: 20px; } .zh-title { margin-left: 30px; padding-top: 30px; font-size: 30px; font-weight: 700; text-align: left; color: #ffffff; line-height: 32px; letter-spacing: 0.3px; font-family: AlibabaPuHuiTiB; } .en-title { margin-left: 30px; font-size: 14px; font-weight: 400; text-align: left; color: #ffffff; line-height: 32px; letter-spacing: -0.91px; font-family: AlibabaPuHuiTiR; }

2023-05-31 上传

[root@QAQ ~]# sudo tail -n 50 /var/log/mysql/error.log 2023-07-14T02:45:21.370949Z 0 [Note] Shutting down plugin 'partition' 2023-07-14T02:45:21.370952Z 0 [Note] Shutting down plugin 'BLACKHOLE' 2023-07-14T02:45:21.370954Z 0 [Note] Shutting down plugin 'ARCHIVE' 2023-07-14T02:45:21.370956Z 0 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA' 2023-07-14T02:45:21.370993Z 0 [Note] Shutting down plugin 'MRG_MYISAM' 2023-07-14T02:45:21.370995Z 0 [Note] Shutting down plugin 'MyISAM' 2023-07-14T02:45:21.371003Z 0 [Note] Shutting down plugin 'INNODB_SYS_VIRTUAL' 2023-07-14T02:45:21.371011Z 0 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES' 2023-07-14T02:45:21.371013Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES' 2023-07-14T02:45:21.371015Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS' 2023-07-14T02:45:21.371017Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN' 2023-07-14T02:45:21.371018Z 0 [Note] Shutting down plugin 'INNODB_SYS_FIELDS' 2023-07-14T02:45:21.371020Z 0 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS' 2023-07-14T02:45:21.371022Z 0 [Note] Shutting down plugin 'INNODB_SYS_INDEXES' 2023-07-14T02:45:21.371024Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS' 2023-07-14T02:45:21.371026Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLES' 2023-07-14T02:45:21.371028Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE' 2023-07-14T02:45:21.371030Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE' 2023-07-14T02:45:21.371032Z 0 [Note] Shutting down plugin 'INNODB_FT_CONFIG' 2023-07-14T02:45:21.371033Z 0 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED' 2023-07-14T02:45:21.371035Z 0 [Note] Shutting down plugin 'INNODB_FT_DELETED' 2023-07-14T02:45:21.371037Z 0 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD' 2023-07-14T02:45:21.371039Z 0 [Note] Shutting down plugin 'INNODB_METRICS' 2023-07-14T02:45:21.371041Z 0 [Note] Shutting down plugin 'INNODB_TEMP_TABLE_INFO' 2023-07-14T02:45:21.371043Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS' 2023-07-14T02:45:21.371045Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU' 2023-07-14T02:45:21.371047Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE' 2023-07-14T02:45:21.371049Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET' 2023-07-14T02:45:21.371050Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX' 2023-07-14T02:45:21.371052Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET' 2023-07-14T02:45:21.371054Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM' 2023-07-14T02:45:21.371056Z 0 [Note] Shutting down plugin 'INNODB_CMP_RESET' 2023-07-14T02:45:21.371058Z 0 [Note] Shutting down plugin 'INNODB_CMP' 2023-07-14T02:45:21.371060Z 0 [Note] Shutting down plugin 'INNODB_LOCK_WAITS' 2023-07-14T02:45:21.371062Z 0 [Note] Shutting down plugin 'INNODB_LOCKS' 2023-07-14T02:45:21.371064Z 0 [Note] Shutting down plugin 'INNODB_TRX' 2023-07-14T02:45:21.371066Z 0 [Note] Shutting down plugin 'InnoDB' 2023-07-14T02:45:21.371100Z 0 [Note] InnoDB: FTS optimize thread exiting. 2023-07-14T02:45:21.371135Z 0 [Note] InnoDB: Starting shutdown... 2023-07-14T02:45:21.471280Z 0 [Note] InnoDB: Dumping buffer pool(s) to /www/server/data/ib_buffer_pool 2023-07-14T02:45:21.471421Z 0 [Note] InnoDB: Buffer pool(s) dump completed at 230714 10:45:21 2023-07-14T02:45:22.992635Z 0 [Note] InnoDB: Shutdown completed; log sequence number 2767468 2023-07-14T02:45:22.993964Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2023-07-14T02:45:22.993980Z 0 [Note] Shutting down plugin 'MEMORY' 2023-07-14T02:45:22.993985Z 0 [Note] Shutting down plugin 'CSV' 2023-07-14T02:45:22.993989Z 0 [Note] Shutting down plugin 'sha256_password' 2023-07-14T02:45:22.993991Z 0 [Note] Shutting down plugin 'mysql_native_password' 2023-07-14T02:45:22.994103Z 0 [Note] Shutting down plugin 'binlog' 2023-07-14T02:45:22.994915Z 0 [Note] /www/server/mysql/bin/mysqld: Shutdown complete

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