{"id":184,"date":"2020-09-14T23:45:00","date_gmt":"2020-09-14T15:45:00","guid":{"rendered":"http:\/\/acgloby.com\/?p=184"},"modified":"2020-09-14T23:45:00","modified_gmt":"2020-09-14T15:45:00","slug":"opengl-%e5%88%9b%e5%bb%ba%e7%aa%97%e5%8f%a3","status":"publish","type":"post","link":"https:\/\/www.acgloby.com\/index.php\/2020\/09\/14\/opengl-%e5%88%9b%e5%bb%ba%e7%aa%97%e5%8f%a3\/","title":{"rendered":"OpenGL \u2013 \u521b\u5efa\u7a97\u53e3"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">GLFW\u662f\u4e00\u4e2a\u4e13\u95e8\u9488\u5bf9OpenGL\u7684C\u8bed\u8a00\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e9b\u6e32\u67d3\u7269\u4f53\u6240\u9700\u7684\u6700\u4f4e\u9650\u5ea6\u7684\u63a5\u53e3\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u7528\u5728main\u4e2d\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwInit<\/span>\u8fdb\u884c\u521d\u59cb\u5316GLFW\uff0c\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwWindowHint<\/span>\u51fd\u6570\u6765\u914d\u7f6eGLFW\uff0c\u8be5\u51fd\u6570\u7684\u9009\u9879\u53ca\u5bf9\u5e94\u503c\u90fd\u53ef\u4ee5\u5728\u8fd9<a href=\"http:\/\/www.glfw.org\/docs\/latest\/window.html#window_hints\" target=\"_blank\"  rel=\"nofollow\" >GLFW\u2019s window handling<\/a>\u8fd9\u7bc7\u6587\u7ae0\u4e2d\u627e\u5230\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int main()\n{\n    glfwInit();\n    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);\n    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);\n    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);\n    \/\/mac\u7cfb\u7edf\u9700\u8981\u52a0\u8fd9\u4e00\u6761\u914d\u7f6e\n    \/\/glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);\n\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">glfwWindowHint\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u4ee3\u8868\u9009\u9879\u7684\u540d\u79f0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u4e2a\u53c2\u6570\u63a5\u53d7\u4e00\u4e2a\u6574\u578b\uff0c\u7528\u6765\u8bbe\u7f6e\u8fd9\u4e2a\u9009\u9879\u7684\u503c\uff0c\u56e0\u4e3a\u6211\u7528\u7684\u662fglfw3\uff0c\u6240\u4ee5\u5728\u8fd9\u91cc\u586b3\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwCreateWindow<\/span>\u51fd\u6570\u6765\u521b\u5efa\u4e00\u4e2a\u7a97\u53e3\u5bf9\u8c61\uff0c\u524d\u4e24\u4e2a\u53c2\u6570\u662f\u6846\u53e3\u5bbd\u9ad8\uff0c\u7b2c\u662f\u4e09\u4e2a\u53c2\u6570\u662f\u7a97\u53e3\u540d\u79f0\uff0c\u7b2c\u56db\u3001\u4e94\u4e2a\u53c2\u6570\u8fd4\u56deGLFWmonitor\u548cGLFWwindow\u5bf9\u8c61\u540e\u7eed\u4f1a\u7528\u5230\uff0c\u8fd9\u91cc\u6682\u65f6\u7528\u4e0d\u5230\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u4e00\u4e2aglfwWindow\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GLFWAPI GLFWwindow* glfwCreateWindow(int width, int height, const char* title, GLFWmonitor* monitor, GLFWwindow* share);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwMakeContextCurrent<\/span>\u51fd\u6570\u5728\u5f53\u524d\u7ebf\u7a0b\u4e2d\u6253\u5f00\u4e00\u4e2a\u7a97\u53e3\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GLFWAPI void glfwMakeContextCurrent(GLFWwindow* window);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u503c\u5f97\u6ce8\u610f\u7684\u662f<span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwCreateWindow<\/span>\u51fd\u6570\u8fd4\u56de\u7684\u5bf9\u8c61\u8fdb\u884c\u4e00\u4e0b\u5224\u7a7a\uff0c\u5982\u679c\u662fNULL\u7684\u8bdd\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwTerminate<\/span>\u6765\u7ec8\u6b62\u8be5\u7a0b\u5e8f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GLFWAPI void glfwTerminate(void);<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>    if (window == NULL)\n    {\n\tstd::cout &lt;&lt; \"Failed to create GLFW window\" &lt;&lt; std::endl;\n\tglfwTerminate(); \/\/\u7ec8\u6b62\n\treturn -1;\n    }<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u8fd9\u6bb5\u4ee3\u7801\u53ef\u4ee5\u6253\u5f00\u4e00\u4e2a\u7a97\u53e3\uff0c\u7a97\u53e3\u5de6\u4e0a\u89d2\u662f\u6211\u4eec\u5b9a\u4e49\u7684\u540d\u5b57\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/acgloby.com\/wp-content\/uploads\/2020\/09\/image-3-1024x644.png\" alt=\"\" class=\"wp-image-193\" width=\"580\" height=\"364\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">GLFW\u4e2d\u5b9e\u73b0\u8f93\u5165\u63a7\u5236\uff0c\u76f8\u5f53\u4e8eunity\u5f53\u4e2d\u7684Input\u63a7\u5236\u952e\u76d8\u9f20\u6807\u7b49\u4e00\u7cfb\u5217\u7684\u6307\u4ee4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u7528<span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwGetKey<\/span>\u51fd\u6570\uff0c\u76f8\u5f53\u4e8eunity\u5f53\u4e2d\u7684<span class=\"has-inline-color has-luminous-vivid-orange-color\">GetKey<\/span>\u65b9\u6cd5\uff0c\u5728c++\u4e2d\u53eb\u51fd\u6570\uff0c\u5728c#\u4e2d\u53eb\u65b9\u6cd5\uff0c\u4e60\u60ef\u4e86\u30fd(\u00b0\u25bd\u3001\u00b0)\uff89<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>void processInput(GLFWwindow *window)\n{\n    if(glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)\n        glfwSetWindowShouldClose(window, true);\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u9762\u81ea\u5b9a\u4e49\u51fd\u6570\u7684\u64cd\u4f5c\u662f\u4f20\u5165\u4e00\u4e2aGLFWwindow\u5bf9\u8c61\uff0c\u5224\u65ad\u6309\u4e0b\u7684\u662f\u5426\u662fEsc\uff0c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u5219\u5173\u95edGLFWwindow\u7a97\u53e3\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>GLFWAPI void glfwSetWindowShouldClose(GLFWwindow* window, int value);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwSetwindowShouldClose<\/span>\u51fd\u6570\u4e2dvalue\u503c\u4e3atrue\u5173\u95edGLFW,\u4e0b\u6b21\u5faa\u73af\u4e2d\u6761\u4ef6\u68c0\u6d4b\u4f1a\u5931\u8d25\uff0c\u7a0b\u5e8f\u5c06\u4f1a\u5173\u95ed\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>while (!glfwWindowShouldClose(window))\n{\n    processInput(window);\n    glClearColor(0,0.5f,0.5f,0);\n    glClear(GL_COLOR_BUFFER_BIT);\n    glfwSwapBuffers(window);\n    glfwPollEvents();\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">glClear<\/span>\u51fd\u6570\u7684\u4f5c\u7528\u662f\u6e05\u9664\u5c4f\u5e55\u4e0a\u7684\u7f13\u5b58\u53ef\u80fd\u7684\u7f13\u51b2\u4f4d\u6709<var><span class=\"has-inline-color has-luminous-vivid-orange-color\">GL_COLOR_BUFFER_BIT<\/span><\/var>\uff08\u989c\u8272\u7f13\u5b58\uff09\uff0c<var><span class=\"has-inline-color has-luminous-vivid-orange-color\">GL_DEPTH_BUFFER_BIT<\/span><\/var>\uff08\u6df1\u5ea6\u7f13\u5b58\uff09\u548c<var><span class=\"has-inline-color has-luminous-vivid-orange-color\">GL_STENCIL_BUFFER_BIT<\/span><\/var>\uff08\u6a21\u677f\u7f13\u5b58\uff09\uff0c<span class=\"has-inline-color has-vivid-cyan-blue-color\">glClearColor<\/span>\u51fd\u6570\u7528\u6765\u8bbe\u7f6e\u6e05\u7a7a\u5c4f\u5e55\u6240\u7528\u7684\u989c\u8272\uff0c\u76f8\u5f53\u4e8eunity Camera\u4e0a\u7684Clear Flags\u8bbe\u7f6eSolid Color\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwSwapBuffers<\/span>\u51fd\u6570\u7684\u4f5c\u7528\u662f\u5237\u65b0buffer\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">glfwPollEvents<\/span>\u51fd\u6570\u7528\u6765\u63a5\u6536\u7528\u6237\u8f93\u5165\u7684\u4e8b\u4ef6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b8c\u6574\u4ee3\u7801\u5982\u4e0b:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#define GLEW_STATIC\n#include \"GL\/glew.h\"\n#include \"GLFW\/glfw3.h\"\n\n#include \"iostream\"\n\nint const WIDTH = 1280;\nint const HEIGHT = 720;\nchar const *TITLE = \"OpenGL Game Scene\";\n\nvoid processInput(GLFWwindow* window);\n\nint main()\n{\n\tglfwInit();\n\tglfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);\n\tglfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);\n\tglfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);\n\t\/\/glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); \/\/mac\u7cfb\u7edf\u9700\u8981\u52a0\n\n\t\/\/Open GLFW Window\n\tGLFWwindow* window = glfwCreateWindow(WIDTH, HEIGHT, TITLE, NULL, NULL);\n\tif (window == NULL)\n\t{\n\t\tstd::cout &lt;&lt; \"Failed to create GLFW window\" &lt;&lt; std::endl;\n\t\tglfwTerminate(); \/\/\u7ec8\u6b62\n\t\treturn -1;\n\t}\n\tglfwMakeContextCurrent(window);\n\n\t\/\/Init GLFW\n\tglewExperimental = true;\n\tif (glewInit() != GLEW_OK)\n\t{\n\t\tstd::cout &lt;&lt; \"Failed to init GLFW window\" &lt;&lt; std::endl;\n\t\tglfwTerminate(); \/\/\u7ec8\u6b62\n\t\treturn -1;\n\t}\n\n\twhile (!glfwWindowShouldClose(window))\n\t{\n\t\tprocessInput(window);\n\t\tglClearColor(0,0.5f,0.5f,0);\n\t\tglClear(GL_COLOR_BUFFER_BIT);\n\t\tglfwSwapBuffers(window); \/\/\u5237\u65b0buffer\n\t\tglfwPollEvents(); \/\/\u63a5\u6536\u7528\u6237\u8f93\u5165\u4e8b\u4ef6\n\t}\n\n\tglfwTerminate();\n\n\treturn 0;\n}\n\n\/\/\/ &lt;summary>\n\/\/\/ \u8f93\u5165\u5904\u7406\n\/\/\/ &lt;\/summary>\n\/\/\/ &lt;param name=\"window\">&lt;\/param>\nvoid processInput(GLFWwindow* window)\n{\n\tif (glfwGetKey(window, GLFW_KEY_ESCAPE) == GLFW_PRESS)\n\t{\n\t\tglfwSetWindowShouldClose(window, true);\n\t}\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd0\u884c\u6548\u679c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"http:\/\/acgloby.com\/wp-content\/uploads\/2020\/09\/image-4-1024x613.png\" alt=\"\" class=\"wp-image-205\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u53c2\u8003\u6587\u6863\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e2d\u6587\uff1a<a href=\"https:\/\/learnopengl-cn.github.io\/01%20Getting%20started\/03%20Hello%20Window\/\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/learnopengl-cn.github.io\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u82f1\u6587\uff1a<a href=\"https:\/\/learnopengl.com\/\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/learnopengl.com\/<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">glfw\uff1a<a href=\"https:\/\/www.glfw.org\/docs\/latest\/window.html#window_hints\" target=\"_blank\"  rel=\"nofollow\" >https:\/\/www.glfw.org\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>GLFW\u662f\u4e00\u4e2a\u4e13\u95e8\u9488\u5bf9OpenGL\u7684C\u8bed\u8a00\u5e93\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u4e9b\u6e32\u67d3\u7269\u4f53\u6240\u9700\u7684\u6700\u4f4e\u9650\u5ea6\u7684\u63a5\u53e3\u3002 \u9996\u5148\u7528\u5728main\u4e2d\u7528glfwInit\u8fdb\u884c &#8230;<\/p>\n","protected":false},"author":1,"featured_media":72,"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-184","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\/184","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=184"}],"version-history":[{"count":0,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/posts\/184\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/media?parent=184"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/categories?post=184"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.acgloby.com\/index.php\/wp-json\/wp\/v2\/tags?post=184"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}