{"id":3889,"date":"2021-12-12T22:10:00","date_gmt":"2021-12-12T14:10:00","guid":{"rendered":"https:\/\/www.yumefx.com\/?p=3889"},"modified":"2022-02-09T13:43:10","modified_gmt":"2022-02-09T05:43:10","slug":"gpu%e6%b8%b2%e6%9f%93%e7%ae%a1%e7%ba%bf%e4%b8%ad%e7%9a%84mvp%e5%8f%98%e6%8d%a2%e7%9f%a9%e9%98%b5","status":"publish","type":"post","link":"https:\/\/www.yumefx.com\/?p=3889","title":{"rendered":"GPU\u6e32\u67d3\u7ba1\u7ebf\u4e2d\u7684MVP\u53d8\u6362\u77e9\u9635"},"content":{"rendered":"\n<h1 style=\"text-align: center;\">\u524d\u8a00<\/h1>\n<p>\u5728\u4e4b\u524d\u7684\u6587\u7ae0\u300a<a href=\"https:\/\/www.yumefx.com\/?p=3636\">\u6e32\u67d3\u7ba1\u7ebf\u57fa\u7840<\/a>\u300b\u4e2d\u6709\u4ecb\u7ecd\u5230\u5728GPU\u6e32\u67d3\u7ba1\u7ebf\u91cc\u7684\u9876\u70b9\u7740\u8272\u5668\uff08Vertex Shader\uff09\u90e8\u5206\uff0cGPU\u4f1a\u5c06CPU\u53d1\u9001\u8fc7\u6765\u7684\u6a21\u578b\u9876\u70b9\u5750\u6807\u901a\u8fc7MVP\u53d8\u6362\u77e9\u9635\u4ece\u6a21\u578b\u7a7a\u95f4\uff08Object Space\uff09\u8f6c\u6362\u4e3a\u88c1\u526a\u7a7a\u95f4\uff08Clip Space\uff09\uff0c\u4ece\u800c\u5b8c\u6210\u4e09\u7ef4\u6a21\u578b\u5411\u4e8c\u7ef4\u5c4f\u5e55\u6295\u5f71\u7684\u8f6c\u6362\u8fc7\u7a0b\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3730 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/11\/RenderingPipeline_10.jpg\" alt=\"\" width=\"1301\" height=\"483\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/11\/RenderingPipeline_10.jpg 1301w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/11\/RenderingPipeline_10-300x111.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/11\/RenderingPipeline_10-1024x380.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/11\/RenderingPipeline_10-768x285.jpg 768w\" sizes=\"(max-width: 1301px) 100vw, 1301px\" \/><\/p>\n<p>\u672c\u6587\u5c31\u4ece\u6570\u5b66\u7b97\u6cd5\u6765\u6df1\u5165\u4ecb\u7ecd\u8fd9\u4e00\u9636\u6bb5\u7684\u5177\u4f53\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\"><b>\u6a21\u578b\u53d8\u6362(modeling tranformation)<\/b><\/h1>\n<p>\u8fd9\u4e00\u9636\u6bb5\u662f\u5c06\u573a\u666f\u4e2d\u7684\u7269\u4f53\u7684\u5750\u6807\u7531\u6a21\u578b\u7a7a\u95f4\uff08Object Space\uff09\u8f6c\u6362\u5230\u4e16\u754c\u7a7a\u95f4\uff08World Space\uff09\uff0c\u7c7b\u6bd4\u4e8e\u7167\u76f8\u65f6\u5e03\u7f6e\u62cd\u7167\u7684\u573a\u666f\u3002<\/p>\n<p>\u6a21\u578b\u7a7a\u95f4\u662f\u4ee5\u6a21\u578b\u7684\u4e2d\u5fc3\uff08\u4e5f\u53ef\u4ee5\u81ea\u5b9a\u4e49\u4e3a\u5176\u4ed6\u70b9\uff0c\u6bd4\u5982\u91cd\u5fc3\u3001\u521d\u59cb\u70b9\u7b49\uff09\u4f5c\u4e3a\u7a7a\u95f4\u5750\u6807\u7cfb\u7684\u539f\u70b9\uff0c\u5efa\u7acb\u57fa\u51c6\u5750\u6807\u7cfb\u7684\u7a7a\u95f4\u3002<span class=\"ne-viewer-b-filler\"><br \/><\/span>\u6bcf\u4e2a\u6a21\u578b\u90fd\u6709\u81ea\u5df1\u72ec\u7acb\u7684\u5750\u6807\u7a7a\u95f4\uff0c\u5f53\u5b83\u79fb\u52a8\u6216\u65cb\u8f6c\u7684\u65f6\u5019\uff0c\u6a21\u578b\u7a7a\u95f4\u4e5f\u4f1a\u8ddf\u7740\u5b83\u79fb\u52a8\u548c\u65cb\u8f6c\u3002<\/p>\n<p>\u4e16\u754c\u7a7a\u95f4\u7684\u539f\u70b9\u4ee5\u53ca\u5750\u6807\u8f74\u662f\u786e\u5b9a\u7684\uff0c\u4f7f\u7528<a href=\"https:\/\/www.yumefx.com\/?p=3802\">\u57fa\u7840\u7684\u53d8\u6362\u77e9\u9635<\/a>\u5c06\u573a\u666f\u4e2d\u7684\u7269\u4f53\u8c03\u6574\u81f3\u5bf9\u5e94\u7684\u4f4d\u7f6e\u5373\u53ef\u3002<\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\"><b>\u89c6\u56fe\u53d8\u6362(view tranformation)<\/b><\/h1>\n<p>\u56e0\u4e3a\u89c2\u5bdf\u89c6\u89d2\u4e00\u822c\u662f\u57fa\u4e8e\u6444\u50cf\u673a\u7684\uff0c\u56e0\u6b64\u89c6\u89d2\u53d8\u6362\u4e5f\u88ab\u79f0\u4e3a\u6444\u50cf\u673a\u53d8\u6362(camera tranformation)\u3002<\/p>\n<p>\u8fd9\u4e00\u9636\u6bb5\u662f\u5c06\u573a\u666f\u4e2d\u7684\u7269\u4f53\u7684\u5750\u6807\u7531\u4e16\u754c\u7a7a\u95f4\uff08World Space\uff09\u8f6c\u6362\u5230\u89c2\u5bdf\u7a7a\u95f4\uff08view Space\uff09\uff0c\u6444\u50cf\u673a\u7684\u4f4d\u7f6e\u4e3a\u5750\u6807\u539f\u70b9\uff0c\u8ba1\u7b97\u7269\u4f53\u6b64\u65f6\u7684\u76f8\u5bf9\u4f4d\u7f6e\uff0c\u7c7b\u6bd4\u4e8e\u7167\u76f8\u65f6\u9009\u62e9\u76f8\u673a\u7684\u89d2\u5ea6\u3002<\/p>\n<p>\u7531\u4e8e\u6444\u50cf\u673a\u7684\u4f4d\u7f6e\u548c\u89d2\u5ea6\u662f\u4e0d\u56fa\u5b9a\u7684\uff0c\u56e0\u6b64\u9996\u5148\u8981\u83b7\u53d6\u5f53\u524d\u6444\u50cf\u673a\u7684\u4f4d\u7f6e\uff08Position\uff09\uff0c\u4ee5\u53ca\u6444\u50cf\u673a\u7684\u671d\u5411\uff08Look-at\u6216\u8005Gaze Direction \uff09\uff0c\u8fd8\u6709\u6444\u50cf\u673a\u5411\u4e0a\u7684\u65b9\u5411\uff08Up 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0\uff09\uff0c\u6444\u50cf\u673a\u9762\u5bf9\u65b9\u5411\u4e3a-Z\u8f74\uff08\u65b9\u4fbf\u540e\u9762\u8ba1\u7b97Z-Depth\uff09\uff0c\u6444\u50cf\u673a\u5411\u4e0a\u65b9\u5411\u4e3aY\u8f74\uff0cY\u8f74\u548cZ\u8f74\u53c9\u4e58\u5f97\u5230X\u8f74\u4e3a\u6444\u50cf\u673a\u53f3\u4fa7\u65b9\u5411\u3002<\/p>\n<p>\u90a3\u4e48\u5bf9\u4e8e\u6a21\u578b\u6765\u8bf4\uff0c\u600e\u4e48\u4ece\u4e16\u754c\u7a7a\u95f4\u8f6c\u6362\u5230\u8fd9\u4e2a\u89c2\u5bdf\u7a7a\u95f4\u5462\uff1f<\/p>\n<p>\u5f88\u7b80\u5355\uff0c\u5982\u679c\u6444\u50cf\u673a\u548c\u573a\u666f\u4e2d\u6240\u6709\u7684\u4e1c\u897f\u4fdd\u6301\u4e00\u81f4\u8fdb\u884c\u79fb\u52a8\u7684\u8bdd\uff0c\u90a3\u4e48\u6574\u4e2a\u573a\u666f\u76f8\u5bf9\u4e8e\u6444\u50cf\u673a\u5c31\u662f\u9759\u6b62\u7684\uff0c\u5728\u6444\u50cf\u673a\u4e2d\u7684\u753b\u9762\u4fdd\u6301\u4e0d\u53d8\u3002<\/p>\n<p>\u56e0\u6b64\u53ef\u4ee5\u5c06\u7269\u4f53\u548c\u6444\u50cf\u673a\u4e00\u8d77\u8fdb\u884c\u79fb\u52a8\u65cb\u8f6c\u53d8\u6362\uff0c\u8ba9\u6444\u50cf\u673a\u5750\u6807\u548c\u4e16\u754c\u7a7a\u95f4\u5750\u6807\u539f\u70b9\u91cd\u5408\uff0c\u5750\u6807\u8f74\u4e5f\u65cb\u8f6c\u5230\u89c2\u5bdf\u7a7a\u95f4\u548c\u4e16\u754c\u7a7a\u95f4\u4e00\u81f4\uff0c\u8fd9\u6837\u89c2\u5bdf\u7a7a\u95f4\u548c\u4e16\u754c\u7a7a\u95f4\u5c31\u662f\u5b8c\u5168\u91cd\u5408\u7684\uff0c\u8fd9\u65f6\u7269\u4f53\u7684\u4e16\u754c\u7a7a\u95f4\u5750\u6807\u5c31\u662f\u5b83\u4eec\u7684\u89c2\u5bdf\u7a7a\u95f4\u5750\u6807\u3002<\/p>\n<p>\u5bf9\u6444\u50cf\u673a\u6765\u8bf4\uff0c\u9996\u5148\u9700\u8981\u4ece\u5f53\u524d\u4f4d\u7f6ep\u5e73\u79fb\u5230\u4e16\u754c\u7a7a\u95f4\u5750\u6807\u7684(0, 0, 0)\u5f97\u5230\u5e73\u79fb\u53d8\u6362\u77e9\u9635\uff0c\u7136\u540e\u5f53\u524d\u671d\u5411\u65b9\u5411g\u65cb\u8f6c\u5230\u4e16\u754c\u5750\u6807\u7a7a\u95f4\u7684-Z\u8f74\uff0c\u671d\u4e0a\u65b9\u5411u\u65cb\u8f6c\u5230Y\u8f74\uff0c\u4ece\u800c\u5f97\u5230\u65cb\u8f6c\u53d8\u6362\u77e9\u9635\u3002\u5c06\u5e73\u79fb\u77e9\u9635\u548c\u65cb\u8f6c\u77e9\u9635\u590d\u5408\u51fa\u4eff\u5c04\u53d8\u6362\u77e9\u9635\u540e\uff0c\u518d\u7ed9\u6240\u6709\u6a21\u578b\u7684\u5750\u6807\u8fdb\u884c\u5e94\u7528\u5373\u53ef\u3002<\/p>\n<p>\u7b2c\u4e00\u6b65\u5e73\u79fb\uff0c\u53ea\u9700\u8981\u51cf\u53bb\u5f53\u524d\u6444\u50cf\u673a\u4f4d\u7f6ee\u7684\u5750\u6807\u5373\u53ef\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3892 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_01.jpg\" alt=\"\" width=\"284\" height=\"194\" \/><\/p>\n<p>\u7b2c\u4e8c\u6b65\u65cb\u8f6c\uff0c\u76f4\u63a5\u8ba1\u7b97\u8fd9\u4e2a\u65cb\u8f6c\u77e9\u9635\u6bd4\u8f83\u9ebb\u70e6\uff0c\u53ef\u4ee5\u53cd\u5411\u601d\u8003\uff0c\u5148\u5199\u51fa\u7531\u4e16\u754c\u5750\u6807\u7a7a\u95f4\u65cb\u8f6c\u5230\u89c2\u5bdf\u7a7a\u95f4\u7684\u65cb\u8f6c\u77e9\u9635\uff0c\u7136\u540e\u6839\u636e\u65cb\u8f6c\u77e9\u9635\u7684\u9006\u77e9\u9635\u5c31\u662f\u53cd\u5411\u65cb\u8f6c\uff0c\u5e76\u4e14\u5b83\u7684\u9006\u77e9\u9635\u7b49\u4e8e\u8f6c\u7f6e\u77e9\u9635\u7684\u539f\u7406\uff0c\u8f6c\u7f6e\u540e\u5c31\u662f\u6240\u9700\u8981\u7684\u65cb\u8f6c\u77e9\u9635\u3002<\/p>\n<p>\u5373\u7531\u6444\u50cf\u673a\u671d\u5411g\u5230-Z\uff0c\u6444\u50cf\u673a\u671d\u4e0at\u5230Y\uff0cg x t\u5230X\uff0c\u5c31\u7b49\u4e8eZ\u5230-g\uff0cY\u5230t\uff0cX\u5230g x t\u7684\u8f6c\u7f6e\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3893 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_02.jpg\" alt=\"\" width=\"904\" height=\"169\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_02.jpg 904w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_02-300x56.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_02-768x144.jpg 768w\" sizes=\"(max-width: 904px) 100vw, 904px\" \/><\/p>\n<h1>\u00a0<\/h1>\n<h1 style=\"text-align: center;\">\u6295\u5f71\u53d8\u6362(projection<b> tranformation)<\/b><\/h1>\n<p>\u6295\u5f71\u53d8\u6362\u7528\u4e8e\u5728\u89c6\u56fe\u53d8\u6362\u4e4b\u540e\uff0c\u6839\u636e\u76f8\u673a\u8bbe\u7f6e\u9009\u62e9\u6b63\u4ea4\u6295\u5f71\u6216\u662f\u900f\u89c6\u6295\u5f71\uff0c\u5c06\u4e09\u7ef4\u7a7a\u95f4\u6295\u5f71\u81f3\u6807\u51c6\u4e8c\u7ef4\u5e73\u9762\u4e4b\u4e0a\uff08\u867d\u7136\u53eb\u505a\u4e8c\u7ef4\u5e73\u9762\uff0c\u4f46\u8fd9\u91cc\u7684z\u5750\u6807\u5e76\u6ca1\u6709\u4e22\u6389\uff0c\u7528\u4e8e\u4e4b\u540e\u7684\u906e\u6321\u5173\u7cfb\u68c0\u6d4b\uff09\u3002<\/p>\n<p>\u8fd9\u4e00\u9636\u6bb5\u5c06\u7269\u4f53\u7684\u5750\u6807\u4ece\u89c2\u5bdf\u7a7a\u95f4\u8f6c\u6362\u5230\u88c1\u526a\u7a7a\u95f4\uff0c\u7c7b\u6bd4\u4e8e\u7167\u76f8\u65f6\u6309\u4e0b\u5feb\u95e8\u5bf9\u7126\u65f6\uff0c\u4e0d\u540c\u7126\u8ddd\u955c\u5934\u7684\u89c6\u89d2\u8303\u56f4\u548c\u900f\u89c6\u6548\u679c\u4e0d\u540c\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3898 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_03.jpg\" alt=\"\" width=\"688\" height=\"349\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_03.jpg 688w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_03-300x152.jpg 300w\" sizes=\"(max-width: 688px) 100vw, 688px\" \/><\/p>\n<h3>\u00a0<\/h3>\n<h3><b>\u6b63\u4ea4\u6295\u5f71\u53d8\u6362(Orthographic Projection Transformation)<\/b><\/h3>\n<p data-pid=\"u9nno7Go\">\u6b63\u4ea4\u6295\u5f71\u662f\u76f8\u5bf9\u7b80\u5355\u7684\u4e00\u79cd\uff0c\u5b8c\u5168\u6ca1\u6709\u8fd1\u5927\u8fdc\u5c0f\u7684\u900f\u89c6\u6548\u679c\uff0c\u5750\u6807\u7684\u76f8\u5bf9\u4f4d\u7f6e\u90fd\u4e0d\u4f1a\u6539\u53d8\uff0c\u6240\u6709\u5149\u7ebf\u90fd\u662f\u5e73\u884c\u4f20\u64ad\uff0c\u6211\u4eec\u53ea\u9700\u5c06\u7269\u4f53\u7684xyz\u5750\u6807\u5168\u90e8\u8f6c\u6362\u5230\u4e00\u4e2a\u503c\u57df[-1, 1]\u7684\u7a7a\u95f4\u4e4b\u4e2d\u5373\u53ef\u3002<\/p>\n<p data-pid=\"u9nno7Go\"><img loading=\"lazy\" class=\"size-full wp-image-3935 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_24.png\" alt=\"\" width=\"625\" height=\"317\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_24.png 625w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_24-300x152.png 300w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><\/p>\n<p data-pid=\"HYDtOsoI\">\u6700\u7b80\u5355\u7684\u7406\u89e3\u65b9\u5f0f\u5c31\u662f\u5c06\u6240\u6709\u4e09\u7ef4\u7a7a\u95f4\u7684\u7269\u4f53\u6324\u538b\u5230\u4e00\u4e2a\u4e8c\u7ef4\u7684\u5e73\u9762\uff0c\u4e5f\u5c31\u662f\u5c06\u6240\u6709\u7269\u4f53\u7684z\u5750\u6807\u76f4\u63a5\u53bb\u6389\uff0c\u4e5f\u5c31\u5b9e\u73b0\u4e86\u4ece\u4e09\u7ef4\u5230\u4e8c\u7ef4\u5e73\u9762\u7684\u6620\u5c04\u3002<\/p>\n<p data-pid=\"HYDtOsoI\">\u4e0d\u8fc7\u5b9e\u9645\u4e0az\u5750\u6807\u4e0d\u4f1a\u88ab\u53bb\u6389\uff0c\u4fdd\u7559z\u662f\u4e3a\u4e86\u4e4b\u540e\u7684\u906e\u6321\u68c0\u6d4b\u3002<\/p>\n<p data-pid=\"HYDtOsoI\">\u4e4b\u6240\u4ee5\u5c06\u5750\u6807\u503c\u57df\u538b\u7f29\u5230\u4e00\u4e2a\u5c0f\u7acb\u65b9\u4f53\u8303\u56f4\u5185\uff0c\u662f\u4e3a\u4e86\u4e4b\u540e\u7684\u8ba1\u7b97\u66f4\u52a0\u65b9\u4fbf\uff0c\u5728\u8f6c\u6362\u5230\u5c4f\u5e55\u5750\u6807\u7684\u65f6\u5019\u4f1a\u91cd\u65b0\u62c9\u4f38\u56de\u539f\u6765\u7684\u6bd4\u4f8b\uff0c\u4e0d\u5fc5\u7ea0\u7ed3\u3002<\/p>\n<p data-pid=\"HYDtOsoI\">\u8fd9\u79cd\u6324\u538b\u65b9\u5f0f\u867d\u7136\u597d\u7406\u89e3\uff0c\u4f46\u4e3a\u4e86\u5b9e\u73b0\u65b9\u4fbf\uff0c\u5b9e\u9645\u4e00\u822c\u91c7\u7528\u4e0b\u9762\u8fd9\u79cd\u7acb\u65b9\u4f53\u6620\u5c04\u7684\u65b9\u6cd5\u3002<\/p>\n<p data-pid=\"HYDtOsoI\"><img loading=\"lazy\" class=\"size-full wp-image-3936 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_25.jpg\" alt=\"\" width=\"1064\" height=\"333\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_25.jpg 1064w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_25-300x94.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_25-1024x320.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_25-768x240.jpg 768w\" sizes=\"(max-width: 1064px) 100vw, 1064px\" \/><\/p>\n<p data-pid=\"B6EYeEYu\">\u7c7b\u4f3c\u6a21\u578b\u7684Bounding-Box\u5305\u56f4\u76d2\u4e00\u6837\uff0c\u5728X\u8f74\u4e0a\uff0c\u5b9a\u4e49\u5de6\u548c\u53f3\uff08l\u548cr\uff09\uff0c\u5728Y\u8f74\u4e0a\uff0c\u5b9a\u4e49\u4e0b\u548c\u4e0a\uff08b\u548ct\uff09\uff0c\u5728Z\u8f74\u4e0a\uff0c\u5b9a\u4e49\u8fdc\u548c\u8fd1\uff08f\u548cn\uff09\u3002\u901a\u8fc7\u8fd9\u516d\u4e2a\u503c\uff0c\u5c31\u53ef\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u957f\u65b9\u4f53\u5305\u88f9\u4f4f\u6574\u4e2a\u573a\u666f\u3002<\/p>\n<p>\u5982\u4f55\u5c06\u8fd9\u4e48\u4e00\u4e2a\u8303\u56f4\u8f6c\u6362\u4e3a[-1,1]\u7684\u7a7a\u95f4\u5462\uff0c\u5148\u901a\u8fc7\u4e00\u4e2a\u4f4d\u79fb\u77e9\u9635\u5c06\u957f\u65b9\u4f53\u4e2d\u5fc3\u79fb\u52a8\u5230\u539f\u70b9\uff0c\u518d\u901a\u8fc7\u4e00\u4e2a\u7f29\u653e\u77e9\u9635\u5c06\u957f\u65b9\u4f53\u538b\u7f29\u6210\u4e00\u4e2a\u7acb\u65b9\u4f53\u3002<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3937 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_26.jpg\" alt=\"\" width=\"832\" height=\"245\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_26.jpg 832w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_26-300x88.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_26-768x226.jpg 768w\" sizes=\"(max-width: 832px) 100vw, 832px\" \/><\/p>\n<h3>\u00a0<\/h3>\n<h3><b>\u900f\u89c6\u6295\u5f71\u53d8\u6362(Perspective Projection Transformation)<\/b><\/h3>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3908 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_11.jpg\" alt=\"\" width=\"720\" height=\"1050\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_11.jpg 720w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_11-206x300.jpg 206w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_11-702x1024.jpg 702w\" sizes=\"(max-width: 720px) 100vw, 720px\" \/><\/p>\n<p>\u900f\u89c6\u6295\u5f71\u5c31\u662f\u6700\u7c7b\u4f3c\u4eba\u773c\u6240\u770b\u4e1c\u897f\u7684\u65b9\u5f0f\uff0c\u9075\u5faa\u8fd1\u5927\u8fdc\u5c0f\uff0c\u5982\u679c\u8bf4\u6b63\u4ea4\u6295\u5f71\u90fd\u662f\u5e73\u884c\u5149\u7ebf\uff0c\u90a3\u4e48\u900f\u89c6\u6295\u5f71\u4e2d\u7684\u5e73\u884c\u5149\u7ebf\u5219\u4e0d\u518d\u5e73\u884c\uff0c\u4f8b\u5982\u4e0a\u56fe\u4e2d\u5e73\u884c\u7684\u94c1\u8f68\u5728\u89c6\u7ebf\u8fdc\u5904\u76f8\u4ea4\u4e8e\u4e00\u70b9\u3002<\/p>\n<p>\u5bf9\u4e8e\u900f\u89c6\u6295\u5f71\u6765\u8bf4\uff0c\u6b63\u4ea4\u6295\u5f71\u4e2d\u7684\u957f\u65b9\u4f53\u6620\u5c04\u4e0d\u518d\u9002\u7528\uff0c\u7531\u4e8e\u8fd1\u5927\u8fdc\u5c0f\u7684\u900f\u89c6\u6548\u679c\uff0c\u573a\u666f\u5e94\u8be5\u5305\u88f9\u5728\u4e00\u4e2a\u6709\u8fdc\u8fd1\u622a\u9762\u7684\u56db\u68f1\u9525\u4f53\u4e2d\uff0c\u5982\u4e0b\u56fe\u5de6\u6240\u793a\uff08\u6444\u50cf\u673a\u5728\u5de6\u4fa7\uff09\u3002<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-3909\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_12.jpg\" alt=\"\" width=\"1346\" height=\"501\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_12.jpg 1346w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_12-300x112.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_12-1024x381.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_12-768x286.jpg 768w\" sizes=\"(max-width: 1346px) 100vw, 1346px\" \/><\/p>\n<p>\u6444\u50cf\u673a\u7684\u53ef\u89c6\u89d2\u5ea6\uff08FOV\u2014\u2014field-of-view\uff09\u4ee5\u53ca\u5bbd\u9ad8\u6bd4\uff08aspect ratio\uff09\u51b3\u5b9a\u4e86\u8fd9\u4e2a\u9525\u4f53\u7684\u89d2\u5ea6\uff0c\u4ee5\u53ca\u6700\u7ec8\u6295\u5f71\u5230\u5c4f\u5e55\u4e0a\u7684\u5bbd\u9ad8\u6bd4\u3002<\/p>\n<p>\u4e3a\u4e86\u65b9\u4fbf\u5b9e\u73b0\uff0c\u53ef\u4ee5\u5148\u5c06\u8fd9\u4e2a\u9525\u4f53\u6324\u538b\u6210\u957f\u65b9\u4f53\uff0c\u518d\u5f53\u505a\u6b63\u4ea4\u6295\u5f71\u5c06\u957f\u65b9\u4f53\u6620\u5c04\u5230[-1,1]\u8303\u56f4\u5185\u3002<\/p>\n<p>\u7b80\u5355\u7406\u89e3\u5c31\u662f\u62c9\u4f4f\u8fdc\u622a\u9762\u8fdb\u884c\u6324\u538b\u7f29\u653e\uff0c\u76f4\u5230\u8fdc\u8fd1\u5e73\u9762\u5927\u5c0f\u76f8\u7b49\u3002<\/p>\n<p>\u6b64\u65f6\uff0c\u6295\u5f71\u8fc7\u7a0b\u53ef\u7528\u4e0b\u56fe\u89e3\u91ca\uff0c\u5c06[x,y,z]\u4e00\u70b9\u7f29\u653e\u4e4b\u540e\uff0c\u5982\u4e0b\u6240\u793a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3910 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_13.jpg\" alt=\"\" width=\"1410\" height=\"475\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_13.jpg 1410w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_13-300x101.jpg 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_13-1024x345.jpg 1024w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_13-768x259.jpg 768w\" sizes=\"(max-width: 1410px) 100vw, 1410px\" \/><\/p>\n<p data-pid=\"JOO--UA4\">\u56fe\u4e2d\u539f\u70b9\u4ee3\u8868\u89c6\u70b9\uff0c\u5229\u7528\u76f8\u4f3c\u4e09\u89d2\u5f62\u6027\u8d28\uff0c\u4e0d\u96be\u5f97\u51fa\u56fe\u4e2d\u53d8\u6362\u4e4b\u540e\u7684\u5750\u6807\u3002<\/p>\n<p data-pid=\"JOO--UA4\">\u9f50\u6b21\u5750\u6807\u6709\u4e00\u4e2a\u6027\u8d28\uff0c\u5c31\u662f(x,y,z,1)\u3001(kx,ky,kz,k!=0)\u3001(xz,yz,zz,z!=0)\u4ee3\u8868\u4e86\u540c\u4e00\u4e2a\u4e09\u7ef4\u7a7a\u95f4\u4e2d\u7684\u70b9(x,y,z)\u3002<\/p>\n<p data-pid=\"H-fJlbLW\">\u90a3\u4e48\u5229\u7528\u9f50\u6b21\u5750\u6807\u7684\u6027\u8d28\uff0c\u5e0c\u671b\u627e\u5230\u4e00\u4e2a\u77e9\u9635\u5b8c\u6210\u5982\u4e0b\u53d8\u6362\uff1a<\/p>\n<p data-pid=\"H-fJlbLW\"><img loading=\"lazy\" class=\"size-full wp-image-3911 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_14.png\" alt=\"\" width=\"834\" height=\"250\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_14.png 834w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_14-300x90.png 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_14-768x230.png 768w\" sizes=\"(max-width: 834px) 100vw, 834px\" \/><\/p>\n<p>\u5373\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3912 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_15.png\" alt=\"\" width=\"798\" height=\"281\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_15.png 798w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_15-300x106.png 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_15-768x270.png 768w\" sizes=\"(max-width: 798px) 100vw, 798px\" \/><\/p>\n<p>\u9996\u5148\uff0c\u8fd9\u4e2a\u77e9\u9635\u7684\u524d\u4e24\u884c\u548c\u6700\u540e\u4e00\u884c\u662f\u80fd\u5f88\u5feb\u786e\u5b9a\u51fa\u6765\u7684\uff0c\u6839\u636e\u6700\u540e\u7684\u9f50\u6b21\u5750\u6807\uff0c\u5982\u4e0b\uff1a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3913 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_16.png\" alt=\"\" width=\"508\" height=\"190\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_16.png 508w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_16-300x112.png 300w\" sizes=\"(max-width: 508px) 100vw, 508px\" \/><\/p>\n<p data-pid=\"KtS9Lqgt\">\u90a3\u4e48\u5982\u4f55\u786e\u5b9a\u7b2c\u4e09\u884c\u5462\uff0c\u8fd9\u91cc\u5c31\u8981\u8fd0\u7528\u900f\u89c6\u6295\u5f71\u7684\u4e24\u4e2a\u6027\u8d28\uff1a<\/p>\n<ul>\n<li data-pid=\"S_rwmOVL\"><b>\u8fd1\u622a\u9762n\u4e0a\u7684\u70b9\u53d8\u6362\u4e4b\u540exyz\u5750\u6807\u4e0d\u53d8\u3002<\/b><\/li>\n<li data-pid=\"S_rwmOVL\"><strong style=\"font-size: inherit;\">\u8fdc\u622a\u9762f\u4e0a\u7684\u70b9\u53d8\u6362\u4e4b\u540ez\u5750\u6807\u4e0d\u53d8\uff0c\u5e76\u4e14\u4e2d\u5fc3\u70b9x\u3001y\u5750\u6807\u4e5f\u4e0d\u53d8<\/strong><span style=\"font-size: inherit;\">\u3002<\/span><\/li>\n<\/ul>\n<p data-pid=\"S_rwmOVL\">\u9996\u5148\u53d6\u8fd1\u5e73\u9762\u4e0a\u4efb\u610f\u4e00\u70b9\uff0c\u7531\u4e8e\u8fd1\u5e73\u9762\u5728\u6324\u538b\u4e4b\u540e\uff0c\u4efb\u4f55\u4e00\u4e2a\u70b9\u90fd\u4e0d\u4f1a\u53d8\uff0c\u6240\u4ee5\u6b64\u65f6z\u5c31\u53ef\u4ee5\u7528n\u6765\u66ff\u4ee3\uff0c\u5f97\u5230\u4ee5\u4e0b\u5f0f\u5b50\uff1a<\/p>\n<p data-pid=\"S_rwmOVL\"><img loading=\"lazy\" class=\"size-full wp-image-3961 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_27.png\" alt=\"\" width=\"929\" height=\"176\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_27.png 929w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_27-300x57.png 300w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_27-768x145.png 768w\" sizes=\"(max-width: 929px) 100vw, 929px\" \/><\/p>\n<p data-pid=\"S_rwmOVL\">\u56e0\u6b64\u7b2c\u4e09\u884c\u7684\u7b2c\u4e00\u7b2c\u4e8c\u5217\u5fc5\u7136\u4e3a\u96f6\u3002<\/p>\n<p data-pid=\"IKDwtrlO\">\u6211\u4eec\u518d\u9009\u53d6\u8fdc\u5e73\u9762\u7684\u4e2d\u5fc3\u70b9\uff0c\u7531\u4e8e\u8fdc\u5e73\u9762\u7684\u4e2d\u5fc3\u70b9\u5728\u6324\u538b\u4e4b\u540e\u4e5f\u4e0d\u4f1a\u53d1\u751f\u53d8\u5316\uff0cx\u3001y\u4f9d\u7136\u662f0\uff0cz=f\uff0c\u6240\u4ee5\u540c\u7406\u53ef\u4ee5\u5199\u51fa\u77e9\u9635\uff1a<\/p>\n<p data-pid=\"IKDwtrlO\"><img loading=\"lazy\" class=\"size-full wp-image-3962 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_28.png\" alt=\"\" width=\"762\" height=\"186\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_28.png 762w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_28-300x73.png 300w\" sizes=\"(max-width: 762px) 100vw, 762px\" \/><\/p>\n<p>\u5f97\u6700\u540e\u53d8\u6362\u77e9\u9635\u4e3a<\/p>\n<p><img loading=\"lazy\" class=\"size-full wp-image-3915 aligncenter\" 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src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_22.png\" alt=\"\" width=\"539\" height=\"170\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_22.png 539w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_22-300x95.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/><\/p>\n<p data-pid=\"fzoT-TzT\">\u7ecf\u8fc7\u4e0a\u8ff04\u4e2a\u53d8\u6362\uff0c\u5c31\u5df2\u7ecf\u6210\u529f\u7684\u628a\u4e09\u7ef4\u4e16\u754c\u7684\u4efb\u610f\u53ef\u89c6\u7269\u4f53\u8f6c\u6362\u5230\u5c4f\u5e55\u4e0a\u4e86\u3002<\/p>\n<p data-pid=\"fzoT-TzT\"><img loading=\"lazy\" class=\" wp-image-3920 aligncenter\" src=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_23.jpg\" alt=\"\" width=\"543\" height=\"72\" srcset=\"https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_23.jpg 543w, https:\/\/www.yumefx.com\/wp-content\/uploads\/2021\/12\/viewTransform_23-300x40.jpg 300w\" 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