{"id":209,"date":"2020-09-20T22:28:26","date_gmt":"2020-09-20T14:28:26","guid":{"rendered":"http:\/\/acgloby.com\/?p=209"},"modified":"2020-09-20T22:28:26","modified_gmt":"2020-09-20T14:28:26","slug":"opengl-%e4%b8%89%e8%a7%92%e5%bd%a2","status":"publish","type":"post","link":"https:\/\/www.acgloby.com\/index.php\/2020\/09\/20\/opengl-%e4%b8%89%e8%a7%92%e5%bd%a2\/","title":{"rendered":"OpenGL &#8211; \u4e09\u89d2\u5f62"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u5728OpenGL\u4e2d\uff0c\u4efb\u4f55\u4e8b\u7269\u90fd\u57283D\u7a7a\u95f4\u4e2d\uff0c\u800c\u5c4f\u5e55\u548c\u7a97\u53e3\u5374\u662f2D\u50cf\u7d20\u6570\u7ec4\uff0cOpenGL\u7684\u5927\u90e8\u5206\u5de5\u4f5c\u90fd\u662f\u5173\u4e8e\u628a3D\u5750\u6807\u8f6c\u53d8\u4e3a\u9002\u5e94\u4f60\u5c4f\u5e55\u76842D\u50cf\u7d20\u3002\u8fd9\u4e2a\u5904\u7406\u8fc7\u7a0b\u5c31\u662f\u56fe\u5f62\u6e32\u67d3\u7ba1\u7ebf\uff0c\u7b2c\u4e00\u90e8\u5206\u628a\u4f60\u76843D\u5750\u6807\u8f6c\u6362\u4e3a2D\u5750\u6807\uff0c\u7b2c\u4e8c\u90e8\u5206\u662f\u628a2D\u5750\u6807\u8f6c\u53d8\u4e3a\u5b9e\u9645\u7684\u6709\u989c\u8272\u7684\u50cf\u7d20\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OpenGL\u7740\u8272\u5668\u662f\u7528OpenGL\u7740\u8272\u5668\u8bed\u8a00(OpenGL Shading Language,\uff09\u7b80\u79f0GLSL\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56fe\u5f62\u6e32\u67d3\u7ba1\u7ebf\u63a5\u53d7\u4e00\u7ec43D\u5750\u6807\uff0c\u7136\u540e\u628a\u5b83\u4eec\u8f6c\u53d8\u4e3a\u4f60\u5c4f\u5e55\u4e0a\u7684\u6709\u82722D\u50cf\u7d20\u8f93\u51fa\u3002\u56fe\u5f62\u6e32\u67d3\u7ba1\u7ebf\u53ef\u4ee5\u88ab\u5212\u5206\u4e3a\u51e0\u4e2a\u9636\u6bb5\uff0c\u6bcf\u4e2a\u9636\u6bb5\u5c06\u4f1a\u628a\u524d\u4e00\u4e2a\u9636\u6bb5\u7684\u8f93\u51fa\u4f5c\u4e3a\u8f93\u5165\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u4ee5\u6570\u7ec4\u7684\u5f62\u5f0f\u4f20\u90123\u4e2a3D\u5750\u6807\u4f5c\u4e3a\u56fe\u5f62\u6e32\u67d3\u7ba1\u7ebf\u7684\u8f93\u5165\uff0c\u7528\u6765\u8868\u793a\u4e00\u4e2a\u4e09\u89d2\u5f62\uff0c\u8fd9\u4e2a\u6570\u7ec4\u53eb\u505a\u9876\u70b9\u6570\u636e(Vertex Data)\uff1b\u9876\u70b9\u6570\u636e\u662f\u4e00\u7cfb\u5217\u9876\u70b9\u7684\u96c6\u5408\u3002\u4e00\u4e2a\u9876\u70b9(Vertex)\u662f\u4e00\u4e2a3D\u5750\u6807\u7684\u6570\u636e\u7684\u96c6\u5408\u3002\u800c\u9876\u70b9\u6570\u636e\u662f\u7528\u9876\u70b9\u5c5e\u6027(Vertex Attribute)\u8868\u793a\u7684\uff0c\u5b83\u53ef\u4ee5\u5305\u542b\u4efb\u4f55\u6211\u4eec\u60f3\u7528\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/acgloby.com\/wp-content\/uploads\/2020\/09\/pipeline.png\" alt=\"\" class=\"wp-image-210\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u56fe\u5f62\u6e32\u67d3\u7ba1\u7ebf<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u9876\u70b9\u7740\u8272\u5668(Vertex Shader)<\/span>\uff0c\u5b83\u628a\u4e00\u4e2a\u5355\u72ec\u7684\u9876\u70b9\u4f5c\u4e3a\u8f93\u5165\u3002\u9876\u70b9\u7740\u8272\u5668\u4e3b\u8981\u7684\u76ee\u7684\u662f\u628a3D\u5750\u6807\u8f6c\u4e3a\u53e6\u4e00\u79cd3D\u5750\u6807\uff08\u540e\u9762\u4f1a\u89e3\u91ca\uff09\uff0c\u540c\u65f6\u9876\u70b9\u7740\u8272\u5668\u5141\u8bb8\u6211\u4eec\u5bf9\u9876\u70b9\u5c5e\u6027\u8fdb\u884c\u4e00\u4e9b\u57fa\u672c\u5904\u7406\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u56fe\u5143\u88c5\u914d(Primitive Assembly)<\/span>\u9636\u6bb5\u5c06\u9876\u70b9\u7740\u8272\u5668\u8f93\u51fa\u7684\u6240\u6709\u9876\u70b9\u4f5c\u4e3a\u8f93\u5165\uff08\u5982\u679c\u662f<var>GL_POINTS<\/var>\uff0c\u90a3\u4e48\u5c31\u662f\u4e00\u4e2a\u9876\u70b9\uff09\uff0c\u5e76\u6240\u6709\u7684\u70b9\u88c5\u914d\u6210\u6307\u5b9a\u56fe\u5143\u7684\u5f62\u72b6\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56fe\u5143\u88c5\u914d\u9636\u6bb5\u7684\u8f93\u51fa\u4f1a\u4f20\u9012\u7ed9<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u51e0\u4f55\u7740\u8272\u5668(Geometry Shader)<\/span>\u3002\u51e0\u4f55\u7740\u8272\u5668\u628a\u56fe\u5143\u5f62\u5f0f\u7684\u4e00\u7cfb\u5217\u9876\u70b9\u7684\u96c6\u5408\u4f5c\u4e3a\u8f93\u5165\uff0c\u5b83\u53ef\u4ee5\u901a\u8fc7\u4ea7\u751f\u65b0\u9876\u70b9\u6784\u9020\u51fa\u65b0\u7684\uff08\u6216\u662f\u5176\u5b83\u7684\uff09\u56fe\u5143\u6765\u751f\u6210\u5176\u4ed6\u5f62\u72b6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u51e0\u4f55\u7740\u8272\u5668\u7684\u8f93\u51fa\u4f1a\u88ab\u4f20\u5165<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u5149\u6805\u5316\u9636\u6bb5(Rasterization Stage)<\/span>\uff0c\u8fd9\u91cc\u5b83\u4f1a\u628a\u56fe\u5143\u6620\u5c04\u4e3a\u6700\u7ec8\u5c4f\u5e55\u4e0a\u76f8\u5e94\u7684\u50cf\u7d20\uff0c\u751f\u6210\u4f9b<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u7247\u6bb5\u7740\u8272\u5668(Fragment Shader)<\/span>\u4f7f\u7528\u7684\u7247\u6bb5\u3002\u5728\u7247\u6bb5\u7740\u8272\u5668\u8fd0\u884c\u4e4b\u524d\u4f1a\u6267\u884c<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u88c1\u5207(Clipping)<\/span>\u3002\u88c1\u5207\u4f1a\u4e22\u5f03\u8d85\u51fa\u4f60\u7684\u89c6\u56fe\u4ee5\u5916\u7684\u6240\u6709\u50cf\u7d20\uff0c\u7528\u6765\u63d0\u5347\u6267\u884c\u6548\u7387\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u7247\u6bb5\u7740\u8272\u5668<\/span>\u7684\u4e3b\u8981\u76ee\u7684\u662f\u8ba1\u7b97\u4e00\u4e2a\u50cf\u7d20\u7684\u6700\u7ec8\u989c\u8272\uff0c\u8fd9\u4e5f\u662f\u6240\u6709OpenGL\u9ad8\u7ea7\u6548\u679c\u4ea7\u751f\u7684\u5730\u65b9\u3002\u901a\u5e38\uff0c\u7247\u6bb5\u7740\u8272\u5668\u5305\u542b3D\u573a\u666f\u7684\u6570\u636e\uff08\u6bd4\u5982\u5149\u7167\u3001\u9634\u5f71\u3001\u5149\u7684\u989c\u8272\u7b49\u7b49\uff09\uff0c\u8fd9\u4e9b\u6570\u636e\u53ef\u4ee5\u88ab\u7528\u6765\u8ba1\u7b97\u6700\u7ec8\u50cf\u7d20\u7684\u989c\u8272\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6240\u6709\u5bf9\u5e94\u989c\u8272\u503c\u786e\u5b9a\u4ee5\u540e\uff0c\u6700\u7ec8\u7684\u5bf9\u8c61\u5c06\u4f1a\u88ab\u4f20\u5230\u6700\u540e\u4e00\u4e2a\u9636\u6bb5\uff0c\u6211\u4eec\u53eb\u505a<span class=\"has-inline-color has-vivid-cyan-blue-color\">Alpha\u6d4b\u8bd5<\/span>\u548c<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u6df7\u5408(Blending)<\/span>\u9636\u6bb5\u3002\u8fd9\u4e2a\u9636\u6bb5\u68c0\u6d4b\u7247\u6bb5\u7684\u5bf9\u5e94\u7684<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u6df1\u5ea6\uff08\u548c\u6a21\u677f(Stencil)\uff09<\/span>\u503c\uff0c\u7528\u5b83\u4eec\u6765\u5224\u65ad\u8fd9\u4e2a\u50cf\u7d20\u662f\u5176\u5b83\u7269\u4f53\u7684\u524d\u9762\u8fd8\u662f\u540e\u9762\uff0c\u51b3\u5b9a\u662f\u5426\u5e94\u8be5\u4e22\u5f03\u3002\u8fd9\u4e2a\u9636\u6bb5\u4e5f\u4f1a\u68c0\u67e5<span class=\"has-inline-color has-vivid-cyan-blue-color\">alpha\u503c<\/span>\uff08alpha\u503c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7269\u4f53\u7684\u900f\u660e\u5ea6\uff09\u5e76\u5bf9\u7269\u4f53\u8fdb\u884c<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u6df7\u5408(Blend)<\/span>\u3002\u6240\u4ee5\uff0c\u5373\u4f7f\u5728\u7247\u6bb5\u7740\u8272\u5668\u4e2d\u8ba1\u7b97\u51fa\u6765\u4e86\u4e00\u4e2a\u50cf\u7d20\u8f93\u51fa\u7684\u989c\u8272\uff0c\u5728\u6e32\u67d3\u591a\u4e2a\u4e09\u89d2\u5f62\u7684\u65f6\u5019\u6700\u540e\u7684\u50cf\u7d20\u989c\u8272\u4e5f\u53ef\u80fd\u5b8c\u5168\u4e0d\u540c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/acgloby.com\/wp-content\/uploads\/2020\/09\/20130528102307483.jpg\" alt=\"\" class=\"wp-image-211\"\/><\/figure>\n\n\n\n<h4 class=\"wp-block-heading\">\u9876\u70b9\u8f93\u5165<\/h4>\n\n\n\n<ul class=\"wp-block-list\"><li><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u9876\u70b9\u6570\u7ec4\u5bf9\u8c61<\/span>\uff1aVertex Array Object\uff0c<span class=\"has-inline-color has-vivid-cyan-blue-color\">VAO<\/span><\/li><li><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u9876\u70b9\u7f13\u51b2\u5bf9\u8c61\uff1a<\/span>Vertex Buffer Object\uff0c<span class=\"has-inline-color has-vivid-cyan-blue-color\">VBO<\/span><\/li><li><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u7d22\u5f15\u7f13\u51b2\u5bf9\u8c61<\/span>\uff1aElement Buffer Object\uff0c<span class=\"has-inline-color has-vivid-cyan-blue-color\">EBO<\/span>\u6216Index Buffer Object\uff0c<span class=\"has-inline-color has-vivid-cyan-blue-color\">IBO<\/span><\/li><\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>float vertices&#91;] = {\n       -0.5f,-0.5f, 0.0f,\n\t0.5f,-0.5f, 0.0f,\n\t0.0f, 0.5f, 0.0f\n};<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9a\u4e49\u8fd9\u6837\u7684\u9876\u70b9\u6570\u636e\u4ee5\u540e\uff0c\u6211\u4eec\u901a\u8fc7<span class=\"has-inline-color has-vivid-cyan-blue-color\">\u9876\u70b9\u7f13\u51b2\u5bf9\u8c61<\/span>(Vertex Buffer Objects, VBO)\u7ba1\u7406\u8fd9\u4e2a\u5185\u5b58\uff0c\u5b83\u4f1a\u5728GPU\u5185\u5b58\uff08\u901a\u5e38\u88ab\u79f0\u4e3a\u663e\u5b58\uff09\u4e2d\u50a8\u5b58\u5927\u91cf\u9876\u70b9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u8fd9\u4e9b\u7f13\u51b2\u5bf9\u8c61\u7684\u597d\u5904\u662f\u6211\u4eec\u53ef\u4ee5\u4e00\u6b21\u6027\u7684\u53d1\u9001\u4e00\u5927\u6279\u6570\u636e\u5230\u663e\u5361\u4e0a\uff0c\u800c\u4e0d\u662f\u6bcf\u4e2a\u9876\u70b9\u53d1\u9001\u4e00\u6b21\u3002\u4eceCPU\u628a\u6570\u636e\u53d1\u9001\u5230\u663e\u5361\u76f8\u5bf9\u8f83\u6162\uff0c\u6240\u4ee5\u53ea\u8981\u53ef\u80fd\u6211\u4eec\u90fd\u8981\u5c1d\u8bd5\u5c3d\u91cf\u4e00\u6b21\u6027\u53d1\u9001\u5c3d\u53ef\u80fd\u591a\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glGenVertexArrays<\/span>\u51fd\u6570\u6765\u751f\u6210\u4e00\u4e2a\u6765\u751f\u6210\u4e00\u4e2aVAO\u5bf9\u8c61\uff0c\u4f7f\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glBindVertexArray<\/span>\u6765\u7ed1\u5b9a\u8c03\u7528\u7684VAO\u5bf9\u8c61\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Vertex Array Objects\nunsigned int VAO;\nglGenVertexArrays(1, &amp;VAO);\nglBindVertexArray(VAO);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528glGenBuffers\u51fd\u6570\u548c\u4e00\u4e2a\u7f13\u51b2ID\u751f\u6210\u4e00\u4e2aVBO\u5bf9\u8c61\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">OpenGL\u6709\u5f88\u591a\u7f13\u51b2\u5bf9\u8c61\u7c7b\u578b\uff0c\u9876\u70b9\u7f13\u51b2\u5bf9\u8c61\u7684\u7f13\u51b2\u7c7b\u578b\u662f<var><span class=\"has-inline-color has-vivid-cyan-blue-color\">GL_ARRAY_BUFFER<\/span><\/var><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glBindBuffer<\/span>\u51fd\u6570\u628a\u65b0\u521b\u5efa\u7684\u7f13\u51b2\u7ed1\u5b9a\u5230<var>GL_ARRAY_BUFFER<\/var>\u76ee\u6807\u4e0a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/Vertex Buffer Objects\nunsigned int VBO;\nglGenBuffers(1, &amp;VBO);\nglBindBuffer(GL_ARRAY_BUFFER, VBO);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u8fd9\u4e00\u523b\u8d77\uff0c\u6211\u4eec\u4f7f\u7528\u7684\u4efb\u4f55\uff08\u5728<var><span class=\"has-inline-color has-vivid-cyan-blue-color\">GL_ARRAY_BUFFER<\/span><\/var>\u76ee\u6807\u4e0a\u7684\uff09\u7f13\u51b2\u8c03\u7528\u90fd\u4f1a\u7528\u6765\u914d\u7f6e\u5f53\u524d\u7ed1\u5b9a\u7684\u7f13\u51b2(<var>VBO<\/var>)\u3002\u7136\u540e\u6211\u4eec\u53ef\u4ee5\u8c03\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glBufferData<\/span>\u51fd\u6570\uff0c\u5b83\u4f1a\u628a\u4e4b\u524d\u5b9a\u4e49\u7684\u9876\u70b9\u6570\u636e\u590d\u5236\u5230\u7f13\u51b2\u7684\u5185\u5b58\u4e2d\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">glBufferData<\/span>\u662f\u4e00\u4e2a\u4e13\u95e8\u7528\u6765\u628a\u7528\u6237\u5b9a\u4e49\u7684\u6570\u636e\u590d\u5236\u5230\u5f53\u524d\u7ed1\u5b9a\u7f13\u51b2\u7684\u51fd\u6570\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u76ee\u6807\u7f13\u51b2\u7684\u7c7b\u578b\uff1a\u9876\u70b9\u7f13\u51b2\u5bf9\u8c61\u5f53\u524d\u7ed1\u5b9a\u5230<var><span class=\"has-inline-color has-vivid-cyan-blue-color\">GL_ARRAY_BUFFER<\/span><\/var>\u76ee\u6807\u4e0a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u5b9a\u4f20\u8f93\u6570\u636e\u7684\u5927\u5c0f(\u4ee5\u5b57\u8282\u4e3a\u5355\u4f4d)\uff1b\u7528\u4e00\u4e2a\u7b80\u5355\u7684sizeof\u8ba1\u7b97\u51fa\u9876\u70b9\u6570\u636e\u5927\u5c0f\u5c31\u884c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e09\u4e2a\u53c2\u6570\u662f\u6211\u4eec\u5e0c\u671b\u53d1\u9001\u7684\u5b9e\u9645\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u56db\u4e2a\u53c2\u6570\u6307\u5b9a\u4e86\u6211\u4eec\u5e0c\u671b\u663e\u5361\u5982\u4f55\u7ba1\u7406\u7ed9\u5b9a\u7684\u6570\u636e\u3002\u5b83\u6709\u4e09\u79cd\u5f62\u5f0f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><span class=\"has-inline-color has-vivid-cyan-blue-color\"><var>GL_STATIC_DRAW<\/var>\u00a0<\/span>\uff1a\u6570\u636e\u4e0d\u4f1a\u6216\u51e0\u4e4e\u4e0d\u4f1a\u6539\u53d8\u3002<\/li><li><var><span class=\"has-inline-color has-vivid-cyan-blue-color\">GL_DYNAMIC_DRAW<\/span><\/var>\uff1a\u6570\u636e\u4f1a\u88ab\u6539\u53d8\u5f88\u591a\u3002<\/li><li><span class=\"has-inline-color has-vivid-cyan-blue-color\"><var>GL_STREAM_DRAW<\/var>\u00a0<\/span>\uff1a\u6570\u636e\u6bcf\u6b21\u7ed8\u5236\u65f6\u90fd\u4f1a\u6539\u53d8\u3002<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u89d2\u5f62\u7684\u4f4d\u7f6e\u6570\u636e\u4e0d\u4f1a\u6539\u53d8\uff0c\u6bcf\u6b21\u6e32\u67d3\u8c03\u7528\u65f6\u90fd\u4fdd\u6301\u539f\u6837\uff0c\u6240\u4ee5\u5b83\u7684\u4f7f\u7528\u7c7b\u578b\u6700\u597d\u662f<var>GL_STATIC_DRAW<\/var>\u3002\u5982\u679c\uff0c\u6bd4\u5982\u8bf4\u4e00\u4e2a\u7f13\u51b2\u4e2d\u7684\u6570\u636e\u5c06\u9891\u7e41\u88ab\u6539\u53d8\uff0c\u90a3\u4e48\u4f7f\u7528\u7684\u7c7b\u578b\u5c31\u662f<var>GL_DYNAMIC_DRAW<\/var>\u6216<var>GL_STREAM_DRAW<\/var>\uff0c\u8fd9\u6837\u5c31\u80fd\u786e\u4fdd\u663e\u5361\u628a\u6570\u636e\u653e\u5728\u80fd\u591f\u9ad8\u901f\u5199\u5165\u7684\u5185\u5b58\u90e8\u5206\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u9876\u70b9\u7740\u8272\u5668\u548c\u7247\u6bb5\u7740\u8272\u5668<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>#version 330 core\nlayout (location = 0) in vec3 aPos;\n\nvoid main()\n{\n    gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u4e0d\u8bfb\u6587\u4ef6\uff0c\u6211\u4eec\u53ef\u4ee5\u7528\u628a\u4e00\u6bb5\u8fd9\u6bb5\u9876\u70b9\u7740\u8272\u5668\u4ee3\u7801\u7528\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u6765\u8bfb\u53d6\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#version 330 core\nout vec4 FragColor;\n\nvoid main()\n{\n    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n} <\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u53ef\u4ee5\u7528\u628a\u4e00\u6bb5\u8fd9\u6bb5\u7247\u6bb5\u7740\u8272\u5668\u4ee3\u7801\u7528\u5b57\u7b26\u4e32\u7684\u5f62\u5f0f\u6765\u8bfb\u53d6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u4eec\u5bf9\u9876\u70b9\u7740\u8272\u5668\u548c\u7247\u6bb5\u7740\u8272\u5668\u8fdb\u884c\u7f16\u8bd1\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u7f16\u8bd1\u9876\u70b9\u7740\u8272\u5668\nunsigned int vertexShader;\nvertexShader = glCreateShader(GL_VERTEX_SHADER);\nglShaderSource(vertexShader, 1, &amp;vertexShaderSource, NULL);\nglCompileShader(vertexShader);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">glShaderSource<\/span>\u51fd\u6570\u7684\u4f5c\u7528\u662f\u4ece\u5b57\u7b26\u4e32\u4e2d\u8bfb\u53d6vertexShader\u4ee3\u7801\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4ee3\u8868\u6709\u51e0\u4e2a\u5b57\u7b26\u4e32\uff0c\u7b2c\u4e09\u4e2a\u53c2\u6570\u7684shader\u4ee3\u7801\u7684\u5185\u5b58\u5730\u5740\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">glCompileShader<\/span>\u51fd\u6570\u8fdb\u884c\u7f16\u8bd1\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u7740\u8272\u5668\u7a0b\u5e8f<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u7740\u8272\u5668\u7a0b\u5e8f\u5bf9\u8c61(Shader Program Object)\u662f\u591a\u4e2a\u7740\u8272\u5668\u5408\u5e76\u4e4b\u540e\u5e76\u6700\u7ec8\u94fe\u63a5\u5b8c\u6210\u7684\u7248\u672c\u3002\u5982\u679c\u8981\u4f7f\u7528\u521a\u624d\u7f16\u8bd1\u7684\u7740\u8272\u5668\u6211\u4eec\u5fc5\u987b\u628a\u5b83\u4eec\u94fe\u63a5(Link)\u4e3a\u4e00\u4e2a\u7740\u8272\u5668\u7a0b\u5e8f\u5bf9\u8c61\uff0c\u7136\u540e\u5728\u6e32\u67d3\u5bf9\u8c61\u7684\u65f6\u5019\u6fc0\u6d3b\u8fd9\u4e2a\u7740\u8272\u5668\u7a0b\u5e8f\u3002\u5df2\u6fc0\u6d3b\u7740\u8272\u5668\u7a0b\u5e8f\u7684\u7740\u8272\u5668\u5c06\u5728\u6211\u4eec\u53d1\u9001\u6e32\u67d3\u8c03\u7528\u7684\u65f6\u5019\u88ab\u4f7f\u7528\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>unsigned int shaderProgram;\nshaderProgram = glCreateProgram();<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728OpenGL\u4e2d\uff0c\u4efb\u4f55\u4e8b\u7269\u90fd\u57283D\u7a7a\u95f4\u4e2d\uff0c\u800c\u5c4f\u5e55\u548c\u7a97\u53e3\u5374\u662f2D\u50cf\u7d20\u6570\u7ec4\uff0cOpenGL\u7684\u5927\u90e8\u5206\u5de5\u4f5c\u90fd\u662f\u5173\u4e8e\u628a3D\u5750\u6807\u8f6c\u53d8\u4e3a\u9002\u5e94\u4f60\u5c4f\u5e55 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":20,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[3],"tags":[],"class_list":["post-209","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-graphics"],"_links":{"self":[{"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/posts\/209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/comments?post=209"}],"version-history":[{"count":0,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/posts\/209\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/media?parent=209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/categories?post=209"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/tags?post=209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}