{"id":439,"date":"2025-02-07T23:22:41","date_gmt":"2025-02-07T15:22:41","guid":{"rendered":"https:\/\/trantor.ink\/?p=439"},"modified":"2025-02-07T23:22:42","modified_gmt":"2025-02-07T15:22:42","slug":"opengl-%e4%b8%ad%e9%a1%b6%e7%82%b9%e5%b1%9e%e6%80%a7%e6%95%b0%e6%8d%ae%e4%bb%8e-cpu-%e4%bc%a0%e8%be%93%e5%88%b0-gpu%ef%bc%8c%e6%b6%89%e5%8f%8a%e5%88%b0%e5%a4%9a%e4%b8%aa%e5%86%85%e5%ad%98%e6%a8%a1","status":"publish","type":"post","link":"https:\/\/trantor.ink\/?p=439","title":{"rendered":"OpenGL \u4e2d\u9876\u70b9\u5c5e\u6027\u6570\u636e\u4ece CPU \u4f20\u8f93\u5230 GPU\uff0c\u6d89\u53ca\u5230\u591a\u4e2a\u5185\u5b58\u6a21\u578b\u548c\u6982\u5ff5"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728 OpenGL \u4e2d\uff0c\u9876\u70b9\u5c5e\u6027\u6570\u636e\u4ece CPU \u4f20\u8f93\u5230 GPU\uff0c\u6d89\u53ca\u5230\u591a\u4e2a\u5185\u5b58\u6a21\u578b\u548c\u6982\u5ff5\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u76f8\u5f53\u590d\u6742\uff0c\u5305\u62ec\u5982\u4f55\u7ba1\u7406\u5185\u5b58\u3001\u5982\u4f55\u9ad8\u6548\u5730\u4f20\u8f93\u6570\u636e\u3001\u4ee5\u53ca\u5982\u4f55\u5728 GPU \u4e0a\u8fdb\u884c\u5904\u7406\u3002\u6211\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e00\u8fc7\u7a0b\u4e2d\u7684\u5173\u952e\u6b65\u9aa4\u548c\u5185\u5b58\u6a21\u578b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1. CPU \u5230 GPU \u7684\u6570\u636e\u4f20\u8f93<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9876\u70b9\u6570\u636e\u7684\u4f20\u8f93\u8fc7\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>CPU \u5185\u5b58\u5230 GPU \u5185\u5b58\u7684\u4f20\u8f93<\/strong>\uff1a\u9876\u70b9\u6570\u636e\u901a\u5e38\u4fdd\u5b58\u5728 CPU \u7aef\u7684\u5185\u5b58\u4e2d\uff08\u6bd4\u5982 CPU \u7684\u4e3b\u5185\u5b58\u6216\u8005\u6620\u5c04\u7684\u6587\u4ef6\u6570\u636e\uff09\uff0c\u7136\u540e\u9700\u8981\u5c06\u8fd9\u4e9b\u6570\u636e\u4f20\u8f93\u5230 GPU \u5185\u5b58\u4e2d\uff0c\u4ee5\u4fbf GPU \u53ef\u4ee5\u9ad8\u6548\u8bbf\u95ee\u5e76\u8fdb\u884c\u8ba1\u7b97\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u7f13\u51b2\u533a\u5bf9\u8c61\uff08Buffer Objects\uff09<\/strong>\uff1a\u5728 OpenGL \u4e2d\uff0c\u6570\u636e\u4f20\u8f93\u662f\u901a\u8fc7\u7f13\u51b2\u533a\u5bf9\u8c61\u6765\u5b8c\u6210\u7684\u3002\u7f13\u51b2\u533a\u5bf9\u8c61\uff08\u5982 <strong>VBO<\/strong>\uff0cVertex Buffer Object\uff09\u662f OpenGL \u4e2d\u7684\u4e00\u79cd\u5b58\u50a8\u9876\u70b9\u6570\u636e\u7684\u7ed3\u6784\uff0c\u5b83\u4f1a\u5c06\u9876\u70b9\u6570\u636e\u4ece CPU \u5185\u5b58\u4f20\u8f93\u5230 GPU \u5185\u5b58\u3002\u6211\u4eec\u901a\u5e38\u901a\u8fc7 glGenBuffers\u3001glBindBuffer \u548c glBufferData \u7b49 OpenGL \u51fd\u6570\u6765\u521b\u5efa\u548c\u4f20\u8f93\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>VBO<\/strong>\uff1a\u9876\u70b9\u7f13\u51b2\u533a\u5bf9\u8c61\u662f\u5b58\u50a8\u9876\u70b9\u6570\u636e\uff08\u5982\u4f4d\u7f6e\u3001\u6cd5\u7ebf\u3001\u989c\u8272\u7b49\uff09\u7684\u6838\u5fc3\u5bf9\u8c61\u3002\u9876\u70b9\u6570\u636e\u901a\u8fc7 glBufferData \u5c06\u6570\u636e\u590d\u5236\u5230 GPU \u5185\u5b58\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>EBO\/IBO<\/strong>\uff1a\u7d22\u5f15\u7f13\u51b2\u533a\u5bf9\u8c61\uff08Element Buffer Object \u6216 Index Buffer Object\uff09\u7528\u4e8e\u5b58\u50a8\u9876\u70b9\u7684\u7d22\u5f15\uff0c\u6307\u793a\u5982\u4f55\u4ece\u9876\u70b9\u7f13\u51b2\u533a\u4e2d\u53d6\u51fa\u9876\u70b9\u8fdb\u884c\u7ed8\u5236\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u6620\u5c04\u7f13\u51b2\u533a\uff08Buffer Mapping\uff09<\/strong>\uff1a\u4e3a\u4e86\u66f4\u9ad8\u6548\u5730\u64cd\u4f5c\u6570\u636e\uff0cOpenGL \u63d0\u4f9b\u4e86\u6620\u5c04\u7f13\u51b2\u533a\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u8ba9 CPU \u548c GPU \u5171\u4eab\u540c\u4e00\u5757\u5185\u5b58\u533a\u57df\u3002\u901a\u8fc7 glMapBuffer \u6216 glMapBufferRange\uff0cCPU \u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee GPU \u5185\u5b58\u4e2d\u7684\u6570\u636e\uff0c\u8fdb\u884c\u4fee\u6539\u6216\u8bfb\u53d6\u3002\u8fd9\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u51cf\u5c11\u6570\u636e\u4f20\u8f93\u7684\u5f00\u9500\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2. \u9876\u70b9\u6570\u636e\u5728 GPU \u5185\u5b58\u4e2d\u7684\u5b58\u50a8\u548c\u7ba1\u7406<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 GPU \u5185\u5b58\u4e2d\uff0c\u9876\u70b9\u6570\u636e\u4f1a\u88ab\u5b58\u50a8\u5728\u7f13\u51b2\u533a\u5bf9\u8c61\uff08Buffer Object\uff09\u4e2d\uff0c\u5e76\u4e14\u4f1a\u88ab <strong>\u7740\u8272\u5668\u7a0b\u5e8f<\/strong>\uff08\u5982\u9876\u70b9\u7740\u8272\u5668\uff09\u76f4\u63a5\u8bfb\u53d6\u548c\u5904\u7406\u3002\u9876\u70b9\u6570\u636e\u7684\u7ec4\u7ec7\u548c\u7ba1\u7406\u65b9\u5f0f\u6d89\u53ca\u5230\u4ee5\u4e0b\u51e0\u4e2a\u6982\u5ff5\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u9876\u70b9\u7f13\u51b2\u533a\u5bf9\u8c61\uff08VBO\uff09<\/strong>\uff1a\u5728 GPU \u5185\u5b58\u4e2d\uff0c\u9876\u70b9\u6570\u636e\uff08\u5982\u9876\u70b9\u4f4d\u7f6e\u3001\u989c\u8272\u3001\u6cd5\u7ebf\u3001\u7eb9\u7406\u5750\u6807\u7b49\uff09\u5b58\u50a8\u5728\u4e00\u4e2a\u6216\u591a\u4e2a VBO \u4e2d\u3002\u6bcf\u4e2a VBO \u53ef\u4ee5\u5b58\u50a8\u4e00\u79cd\u6216\u591a\u79cd\u9876\u70b9\u5c5e\u6027\u6570\u636e\uff0c\u5177\u4f53\u5b58\u50a8\u54ea\u4e9b\u5c5e\u6027\u7531\u5e94\u7528\u7a0b\u5e8f\u51b3\u5b9a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u9876\u70b9\u6570\u7ec4\u5bf9\u8c61\uff08VAO\uff09<\/strong>\uff1aVAO \u662f OpenGL \u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u5b83\u662f\u4e00\u4e2a\u5305\u542b\u591a\u4e2a VBO \u7684\u5bb9\u5668\u3002VAO \u5b58\u50a8\u4e86\u591a\u4e2a\u9876\u70b9\u7f13\u51b2\u533a\u5bf9\u8c61\u7684\u72b6\u6001\uff0c\u5e76\u7ed1\u5b9a\u5b83\u4eec\u4e0e\u7740\u8272\u5668\u4e2d\u7684\u9876\u70b9\u5c5e\u6027\u3002\u8fd9\u610f\u5473\u7740\uff0cVAO \u5b9a\u4e49\u4e86\u5982\u4f55\u5728\u9876\u70b9\u7740\u8272\u5668\u4e2d\u83b7\u53d6\u4e0d\u540c\u7684\u9876\u70b9\u5c5e\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 \u5728\u7ed1\u5b9a VAO \u4e4b\u540e\uff0c\u6240\u6709\u7684 VBO \u6570\u636e\u548c\u5c5e\u6027\u7ed1\u5b9a\u5173\u7cfb\u90fd\u4f1a\u88ab\u8bb0\u5f55\u5728 VAO \u4e2d\uff0c\u8fd9\u6837 GPU \u5c31\u80fd\u591f\u6839\u636e VAO \u4e2d\u7684\u914d\u7f6e\uff0c\u81ea\u52a8\u8bfb\u53d6\u5bf9\u5e94\u7684\u9876\u70b9\u5c5e\u6027\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u9876\u70b9\u5c5e\u6027\u6307\u9488\uff08Vertex Attribute Pointer\uff09<\/strong>\uff1a\u6bcf\u4e2a VBO \u4e2d\u7684\u9876\u70b9\u6570\u636e\u9700\u8981\u544a\u8bc9 OpenGL \u5982\u4f55\u89e3\u6790\uff0c\u5373\u901a\u8fc7 glVertexAttribPointer \u8bbe\u7f6e\u9876\u70b9\u5c5e\u6027\u6307\u9488\u3002\u8fd9\u4e9b\u6307\u9488\u544a\u8bc9 OpenGL \u5982\u4f55\u8bbf\u95ee\u7f13\u51b2\u533a\u4e2d\u7684\u6570\u636e\uff0c\u4ee5\u53ca\u6bcf\u4e2a\u5c5e\u6027\u7684\u7c7b\u578b\u3001\u5927\u5c0f\u548c\u6b65\u5e45\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 \u6bd4\u5982\uff1a\u4e00\u4e2a VBO \u53ef\u80fd\u5305\u542b\u4f4d\u7f6e\u6570\u636e\uff08vec3\uff09\u548c\u989c\u8272\u6570\u636e\uff08vec4\uff09\uff0c\u90a3\u4e48\u4f60\u9700\u8981\u4e3a\u6bcf\u4e2a\u5c5e\u6027\uff08\u4f4d\u7f6e\u3001\u989c\u8272\u7b49\uff09\u6307\u5b9a\u4e00\u4e2a\u5bf9\u5e94\u7684\u5c5e\u6027\u6307\u9488\uff0cOpenGL \u624d\u80fd\u5728\u9876\u70b9\u7740\u8272\u5668\u4e2d\u6b63\u786e\u5730\u8bfb\u53d6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3. \u6570\u636e\u7684\u4f20\u8f93\u4e0e\u540c\u6b65<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9876\u70b9\u6570\u636e\u4ece CPU \u5230 GPU \u7684\u4f20\u8f93\u5e76\u4e0d\u662f\u4e00\u8e74\u800c\u5c31\u7684\uff0c\u5b83\u9700\u8981\u8003\u8651\u5982\u4f55\u540c\u6b65 CPU \u548c GPU \u7684\u5de5\u4f5c\u6d41\u7a0b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u5f02\u6b65\u4f20\u8f93<\/strong>\uff1aOpenGL \u652f\u6301\u5f02\u6b65\u6570\u636e\u4f20\u8f93\uff0c\u53ef\u4ee5\u5c06\u6570\u636e\u4f20\u8f93\u64cd\u4f5c\u4e0e\u6e32\u67d3\u64cd\u4f5c\u5e76\u884c\u6267\u884c\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002\u5728\u4f20\u8f93\u8fc7\u7a0b\u4e2d\uff0cCPU \u53ef\u4ee5\u7ee7\u7eed\u6267\u884c\u5176\u4ed6\u4efb\u52a1\uff0c\u800c GPU \u4e5f\u53ef\u4ee5\u7ee7\u7eed\u5904\u7406\u5176\u4ed6\u6570\u636e\u3002\u8fd9\u901a\u5e38\u662f\u901a\u8fc7 <strong>\u53cc\u7f13\u51b2<\/strong> \u6216 <strong>\u591a\u7f13\u51b2<\/strong> \u6280\u672f\u6765\u5b9e\u73b0\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u7f13\u51b2\u533a\u6620\u5c04\u7684\u540c\u6b65<\/strong>\uff1a\u5982\u679c CPU \u548c GPU \u9700\u8981\u8bbf\u95ee\u76f8\u540c\u7684\u7f13\u51b2\u533a\uff08\u6bd4\u5982\u6620\u5c04\u7f13\u51b2\u533a\u8fdb\u884c\u66f4\u65b0\uff09\uff0c\u5219\u9700\u8981\u786e\u4fdd\u540c\u6b65\u3002OpenGL \u63d0\u4f9b\u4e86\u591a\u79cd\u540c\u6b65\u673a\u5236\uff08\u5982 glFenceSync\u3001glWaitSync\uff09\u6765\u786e\u4fdd CPU \u548c GPU \u5728\u6570\u636e\u8bbf\u95ee\u4e0a\u7684\u4e00\u81f4\u6027\uff0c\u907f\u514d\u7ade\u6001\u6761\u4ef6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u6d41\u5f0f\u6570\u636e\u4f20\u8f93<\/strong>\uff1a\u5bf9\u4e8e\u52a8\u6001\u66f4\u65b0\u7684\u9876\u70b9\u6570\u636e\uff0cOpenGL \u652f\u6301\u4f7f\u7528 <strong>\u52a8\u6001\u7f13\u51b2\u533a<\/strong>\uff08glBufferData \u4e2d\u7684 GL_DYNAMIC_DRAW\uff09\u6765\u63d0\u9ad8\u6548\u7387\u3002\u9876\u70b9\u6570\u636e\u4f1a\u9891\u7e41\u66f4\u65b0\u65f6\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528 <strong>\u6620\u5c04\u7f13\u51b2\u533a<\/strong> \u6216 <strong>\u4f7f\u7528\u591a\u4e2a\u7f13\u51b2\u533a\u5207\u6362<\/strong>\uff08\u6bd4\u5982\u4f7f\u7528 <strong>\u53cc\u7f13\u51b2<\/strong>\uff09\u6765\u907f\u514d\u6570\u636e\u4f20\u8f93\u7684\u74f6\u9888\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4. \u9876\u70b9\u7740\u8272\u5668\u8bfb\u53d6\u9876\u70b9\u6570\u636e<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u9876\u70b9\u7740\u8272\u5668\u9636\u6bb5\uff0c\u9876\u70b9\u6570\u636e\uff08\u5982\u4f4d\u7f6e\u3001\u6cd5\u7ebf\u3001\u989c\u8272\u7b49\uff09\u4f1a\u4ece GPU \u5185\u5b58\u4e2d\u7684\u7f13\u51b2\u533a\u8bfb\u53d6\u3002\u8fd9\u4e9b\u6570\u636e\u4f1a\u901a\u8fc7\u7ed1\u5b9a\u7684 VAO \u4f20\u9012\u5230\u9876\u70b9\u7740\u8272\u5668\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u5c5e\u6027\u53d8\u91cf<\/strong>\uff1a\u5728 GLSL \u9876\u70b9\u7740\u8272\u5668\u4e2d\uff0c\u4f7f\u7528 <strong>attribute<\/strong> \u6216 <strong>in<\/strong> \u53d8\u91cf\u6765\u63a5\u6536\u9876\u70b9\u5c5e\u6027\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u6709\u4e00\u4e2a\u5305\u542b\u4f4d\u7f6e\u6570\u636e\u7684 VBO\uff0c\u9876\u70b9\u7740\u8272\u5668\u4e2d\u4f1a\u5b9a\u4e49\u4e00\u4e2a\u5bf9\u5e94\u7684 in \u53d8\u91cf\u6765\u63a5\u6536\u8be5\u6570\u636e\u3002<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">in vec3 inPosition; \/\/ \u4ece VBO \u4e2d\u8bfb\u53d6\u4f4d\u7f6e\u6570\u636e\nin vec4 inColor;    \/\/ \u4ece VBO \u4e2d\u8bfb\u53d6\u989c\u8272\u6570\u636e<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u2022 <strong>\u53d8\u6362\u8fc7\u7a0b<\/strong>\uff1a\u9876\u70b9\u7740\u8272\u5668\u4f1a\u5bf9\u9876\u70b9\u6570\u636e\u8fdb\u884c\u53d8\u6362\u64cd\u4f5c\uff08\u5982\u6a21\u578b\u53d8\u6362\u3001\u89c6\u56fe\u53d8\u6362\u3001\u6295\u5f71\u53d8\u6362\uff09\uff0c\u5e76\u5c06\u53d8\u6362\u540e\u7684\u6570\u636e\u4f20\u9012\u5230\u4e0b\u4e00\u4e2a\u6e32\u67d3\u9636\u6bb5\uff08\u5982\u5149\u6805\u5316\u9636\u6bb5\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u603b\u7ed3<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 OpenGL \u4e2d\uff0c\u9876\u70b9\u6570\u636e\u7684\u4f20\u8f93\u548c\u5b58\u50a8\u8fc7\u7a0b\u6d89\u53ca\u591a\u4e2a\u5185\u5b58\u6a21\u578b\u548c\u6982\u5ff5\uff0c\u5305\u62ec\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">1. <strong>CPU \u5230 GPU \u7684\u6570\u636e\u4f20\u8f93<\/strong>\uff1a\u901a\u8fc7\u7f13\u51b2\u533a\u5bf9\u8c61\uff08VBO\uff09\u5c06\u9876\u70b9\u6570\u636e\u4f20\u8f93\u5230 GPU \u5185\u5b58\u4e2d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">2. <strong>GPU \u5185\u5b58\u7ba1\u7406<\/strong>\uff1a\u9876\u70b9\u6570\u636e\u5b58\u50a8\u5728\u7f13\u51b2\u533a\u5bf9\u8c61\u4e2d\uff0c\u7740\u8272\u5668\u901a\u8fc7 VAO \u548c\u9876\u70b9\u5c5e\u6027\u6307\u9488\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">3. <strong>\u5185\u5b58\u540c\u6b65\u4e0e\u4f18\u5316<\/strong>\uff1a\u4f7f\u7528\u7f13\u51b2\u533a\u6620\u5c04\u3001\u5f02\u6b65\u4f20\u8f93\u548c\u53cc\u7f13\u51b2\u7b49\u6280\u672f\u6765\u4f18\u5316\u6570\u636e\u4f20\u8f93\u548c\u8bbf\u95ee\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">4. <strong>\u9876\u70b9\u7740\u8272\u5668\u8bfb\u53d6\u6570\u636e<\/strong>\uff1a\u9876\u70b9\u7740\u8272\u5668\u901a\u8fc7\u7ed1\u5b9a\u7684 VAO \u83b7\u53d6\u9876\u70b9\u5c5e\u6027\uff0c\u5e76\u8fdb\u884c\u76f8\u5e94\u7684\u53d8\u6362\u8ba1\u7b97\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u8fc7\u7a0b\u4f7f\u5f97 OpenGL \u80fd\u591f\u9ad8\u6548\u5730\u5c06\u9876\u70b9\u6570\u636e\u4ece CPU \u4f20\u8f93\u5230 GPU\uff0c\u5e76\u5728\u9876\u70b9\u7740\u8272\u5668\u4e2d\u8fdb\u884c\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 OpenGL \u4e2d\uff0c\u9876\u70b9\u5c5e\u6027\u6570\u636e\u4ece CPU \u4f20\u8f93\u5230 GPU\uff0c\u6d89\u53ca\u5230\u591a\u4e2a\u5185\u5b58\u6a21\u578b\u548c\u6982\u5ff5\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u76f8\u5f53\u590d\u6742\uff0c\u5305\u62ec\u5982\u4f55\u7ba1\u7406\u5185\u5b58\u3001\u5982\u4f55\u9ad8\u6548\u5730\u4f20\u8f93\u6570\u636e\u3001\u4ee5\u53ca\u5982\u4f55\u5728 GPU \u4e0a\u8fdb\u884c\u5904\u7406\u3002\u6211\u4f1a\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e00\u8fc7\u7a0b\u4e2d\u7684\u5173\u952e\u6b65\u9aa4\u548c\u5185\u5b58\u6a21\u578b\u3002 1. CPU \u5230 GPU \u7684\u6570\u636e\u4f20\u8f93 \u9876\u70b9\u6570\u636e\u7684\u4f20\u8f93\u8fc7\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u51e0\u4e2a\u6b65\u9aa4\uff1a \u2022 CPU \u5185\u5b58\u5230 GPU \u5185\u5b58\u7684\u4f20\u8f93\uff1a\u9876\u70b9\u6570\u636e\u901a\u5e38\u4fdd\u5b58\u5728 CPU \u7aef\u7684\u5185\u5b58\u4e2d\uff08\u6bd4\u5982 CPU \u7684\u4e3b\u5185\u5b58\u6216\u8005\u6620\u5c04\u7684\u6587\u4ef6\u6570\u636e\uff09\uff0c\u7136\u540e\u9700\u8981\u5c06\u8fd9\u4e9b\u6570\u636e\u4f20\u8f93\u5230 GPU \u5185\u5b58\u4e2d\uff0c\u4ee5\u4fbf GPU \u53ef\u4ee5\u9ad8\u6548\u8bbf\u95ee\u5e76\u8fdb\u884c\u8ba1\u7b97\u3002 \u2022 \u7f13\u51b2\u533a\u5bf9\u8c61\uff08Buffer Objects\uff09\uff1a\u5728 OpenGL \u4e2d\uff0c\u6570\u636e\u4f20\u8f93\u662f\u901a\u8fc7\u7f13\u51b2\u533a\u5bf9\u8c61\u6765\u5b8c\u6210\u7684\u3002\u7f13\u51b2\u533a\u5bf9\u8c61\uff08\u5982 VBO\uff0cVertex Buffer Object\uff09\u662f OpenGL \u4e2d\u7684\u4e00\u79cd\u5b58\u50a8\u9876\u70b9\u6570\u636e\u7684\u7ed3\u6784\uff0c\u5b83\u4f1a\u5c06\u9876\u70b9\u6570\u636e\u4ece CPU \u5185\u5b58\u4f20\u8f93\u5230 GPU \u5185\u5b58\u3002\u6211\u4eec\u901a\u5e38\u901a\u8fc7 glGenBuffers\u3001glBindBuffer \u548c glBufferData \u7b49 OpenGL \u51fd\u6570\u6765\u521b\u5efa\u548c\u4f20\u8f93\u6570\u636e\u3002 \u2022 VBO\uff1a\u9876\u70b9\u7f13\u51b2\u533a\u5bf9\u8c61\u662f\u5b58\u50a8\u9876\u70b9\u6570\u636e\uff08\u5982\u4f4d\u7f6e\u3001\u6cd5\u7ebf\u3001\u989c\u8272\u7b49\uff09\u7684\u6838\u5fc3\u5bf9\u8c61\u3002\u9876\u70b9\u6570\u636e\u901a\u8fc7 glBufferData \u5c06\u6570\u636e\u590d\u5236\u5230 GPU \u5185\u5b58\u3002 \u2022 EBO\/IBO\uff1a\u7d22\u5f15\u7f13\u51b2\u533a\u5bf9\u8c61\uff08Element Buffer Object \u6216 Index Buffer Object\uff09\u7528\u4e8e\u5b58\u50a8\u9876\u70b9\u7684\u7d22\u5f15\uff0c\u6307\u793a\u5982\u4f55\u4ece\u9876\u70b9\u7f13\u51b2\u533a\u4e2d\u53d6\u51fa\u9876\u70b9\u8fdb\u884c\u7ed8\u5236\u3002 \u2022 \u6620\u5c04\u7f13\u51b2\u533a\uff08Buffer Mapping\uff09\uff1a\u4e3a\u4e86\u66f4\u9ad8\u6548\u5730\u64cd\u4f5c\u6570\u636e\uff0cOpenGL \u63d0\u4f9b\u4e86\u6620\u5c04\u7f13\u51b2\u533a\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u8ba9 CPU \u548c GPU \u5171\u4eab\u540c\u4e00\u5757\u5185\u5b58\u533a\u57df\u3002\u901a\u8fc7 glMapBuffer \u6216 glMapBufferRange\uff0cCPU \u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee GPU \u5185\u5b58\u4e2d\u7684\u6570\u636e\uff0c\u8fdb\u884c\u4fee\u6539\u6216\u8bfb\u53d6\u3002\u8fd9\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u51cf\u5c11\u6570\u636e\u4f20\u8f93\u7684\u5f00\u9500\u3002 2. \u9876\u70b9\u6570\u636e\u5728 GPU \u5185\u5b58\u4e2d\u7684\u5b58\u50a8\u548c\u7ba1\u7406 \u5728 GPU \u5185\u5b58\u4e2d\uff0c\u9876\u70b9\u6570\u636e\u4f1a\u88ab\u5b58\u50a8\u5728\u7f13\u51b2\u533a\u5bf9\u8c61\uff08Buffer Object\uff09\u4e2d\uff0c\u5e76\u4e14\u4f1a\u88ab \u7740\u8272\u5668\u7a0b\u5e8f\uff08\u5982\u9876\u70b9\u7740\u8272\u5668\uff09\u76f4\u63a5\u8bfb\u53d6\u548c\u5904\u7406\u3002\u9876\u70b9\u6570\u636e\u7684\u7ec4\u7ec7\u548c\u7ba1\u7406\u65b9\u5f0f\u6d89\u53ca\u5230\u4ee5\u4e0b\u51e0\u4e2a\u6982\u5ff5\uff1a \u2022 \u9876\u70b9\u7f13\u51b2\u533a\u5bf9\u8c61\uff08VBO\uff09\uff1a\u5728 GPU \u5185\u5b58\u4e2d\uff0c\u9876\u70b9\u6570\u636e\uff08\u5982\u9876\u70b9\u4f4d\u7f6e\u3001\u989c\u8272\u3001\u6cd5\u7ebf\u3001\u7eb9\u7406\u5750\u6807\u7b49\uff09\u5b58\u50a8\u5728\u4e00\u4e2a\u6216\u591a\u4e2a VBO \u4e2d\u3002\u6bcf\u4e2a VBO \u53ef\u4ee5\u5b58\u50a8\u4e00\u79cd\u6216\u591a\u79cd\u9876\u70b9\u5c5e\u6027\u6570\u636e\uff0c\u5177\u4f53\u5b58\u50a8\u54ea\u4e9b\u5c5e\u6027\u7531\u5e94\u7528\u7a0b\u5e8f\u51b3\u5b9a\u3002 \u2022 \u9876\u70b9\u6570\u7ec4\u5bf9\u8c61\uff08VAO\uff09\uff1aVAO \u662f OpenGL \u4e2d\u7684\u4e00\u4e2a\u91cd\u8981\u6982\u5ff5\uff0c\u5b83\u662f\u4e00\u4e2a\u5305\u542b\u591a\u4e2a VBO \u7684\u5bb9\u5668\u3002VAO \u5b58\u50a8\u4e86\u591a\u4e2a\u9876\u70b9\u7f13\u51b2\u533a\u5bf9\u8c61\u7684\u72b6\u6001\uff0c\u5e76\u7ed1\u5b9a\u5b83\u4eec\u4e0e\u7740\u8272\u5668\u4e2d\u7684\u9876\u70b9\u5c5e\u6027\u3002\u8fd9\u610f\u5473\u7740\uff0cVAO \u5b9a\u4e49\u4e86\u5982\u4f55\u5728\u9876\u70b9\u7740\u8272\u5668\u4e2d\u83b7\u53d6\u4e0d\u540c\u7684\u9876\u70b9\u5c5e\u6027\u3002 \u2022 \u5728\u7ed1\u5b9a VAO \u4e4b\u540e\uff0c\u6240\u6709\u7684 VBO \u6570\u636e\u548c\u5c5e\u6027\u7ed1\u5b9a\u5173\u7cfb\u90fd\u4f1a\u88ab\u8bb0\u5f55\u5728 VAO \u4e2d\uff0c\u8fd9\u6837 GPU \u5c31\u80fd\u591f\u6839\u636e VAO \u4e2d\u7684\u914d\u7f6e\uff0c\u81ea\u52a8\u8bfb\u53d6\u5bf9\u5e94\u7684\u9876\u70b9\u5c5e\u6027\u6570\u636e\u3002 \u2022 \u9876\u70b9\u5c5e\u6027\u6307\u9488\uff08Vertex Attribute Pointer\uff09\uff1a\u6bcf\u4e2a VBO \u4e2d\u7684\u9876\u70b9\u6570\u636e\u9700\u8981\u544a\u8bc9 OpenGL \u5982\u4f55\u89e3\u6790\uff0c\u5373\u901a\u8fc7 glVertexAttribPointer 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