\u7ee7\u7eed<\/p>\n
\u5229\u7528\u4e0a\u9762\u7684\u6846\u67b6\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u65b9\u4fbf\u7684\u8fdb\u884c\u6211\u4eec\u7684OPENGL\u7f16\u7a0b\uff08NeHe\u7684\u6559\u7a0b\u4e5f\u662f\u56f4\u7ed5\u8fd9\u4e2a\u6846\u67b6\u5c55\u5f00\u7684\uff0c\u800c\u4e14\u6211\u770b\u8001\u5916\u7684\u6e90\u7801\uff0c\u5f88\u591a\u4f7f\u7528\u8fd9\u4e2a\u6846\u67b6\u7684\uff09<\/p>\n
\u4e0b\u9762\u6211\u4eec\u5728\u7a97\u4f53\u4e0a\u753b\u4e00\u4e2a\u4e09\u89d2\u548c\u4e00\u4e2a\u6b63\u65b9\u5f62<\/p>\n
\u53ea\u8981\u5728Procedure glDraw();\u4e2d\u6dfb\u52a0\u4ee5\u4e0b\u4ee3\u7801\u5373\u53ef<\/p>\n
\r\n\/\/==============================================================================\r\n\/\/\u6240\u6709\u7684\u7ed8\u56fe\u4ee3\u7801\u3002\u4efb\u4f55\u60a8\u6240\u60f3\u5728\u5c4f\u5e55\u4e0a\u663e\u793a\u7684\u4e1c\u4e1c\u90fd\u5c06\u5728\u6b64\u6bb5\u4ee3\u7801\u4e2d\u51fa\u73b0\u3002\r\n\/\/\u4ee5\u540e\u7684\u6bcf\u4e2a\u7a0b\u5e8f\u4f1a\u5728\u6b64\u5904\u589e\u52a0\u65b0\u7684\u4ee3\u7801\u3002\r\n\/\/==============================================================================\r\n\r\nProcedure glDraw();\r\nBegin\r\n glClear(GL_COLOR_BUFFER_BIT Or GL_DEPTH_BUFFER_BIT); \/\/ \u6e05\u9664\u5c4f\u5e55\u548c\u6df1\u5ea6\u7f13\u5b58\r\n\r\n \/\/\u5f53\u60a8\u8c03\u7528glLoadIdentity()\u4e4b\u540e\uff0c\u60a8\u5b9e\u9645\u4e0a\u8bb2\u5f53\u524d\u70b9\u79fb\u5230\u4e86\u5c4f\u5e55\u4e2d\u5fc3\uff0cX\u5750\u6807\u8f74\u4ece\u5de6\u81f3\u53f3\uff0c\r\n \/\/Y\u5750\u6807\u8f74\u4ece\u4e0b\u81f3\u4e0a\uff0cZ\u5750\u6807\u8f74\u4ece\u91cc\u81f3\u5916\u3002OpenGL\u5c4f\u5e55\u4e2d\u5fc3\u7684\u5750\u6807\u503c\u662fX\u548cY\u8f74\u4e0a\u76840.0f\u70b9\u3002\r\n \/\/ \u4e2d\u5fc3\u5de6\u9762\u7684\u5750\u6807\u503c\u662f\u8d1f\u503c\uff0c\u53f3\u9762\u662f\u6b63\u503c\u3002\u79fb\u5411\u5c4f\u5e55\u9876\u7aef\u662f\u6b63\u503c\uff0c\u79fb\u5411\u5c4f\u5e55\u5e95\u7aef\u662f\u8d1f\u503c\u3002\r\n \/\/ \u79fb\u5165\u5c4f\u5e55\u6df1\u5904\u662f\u8d1f\u503c\uff0c\u79fb\u51fa\u5c4f\u5e55\u5219\u662f\u6b63\u503c\u3002\r\n glLoadIdentity(); \/\/ \u91cd\u7f6e\u5f53\u524d\u7684\u6a21\u578b\u89c2\u5bdf\u77e9\u9635\r\n\r\n \/\/glTranslatef(x, y, z)\u6cbf\u7740 X, Y \u548c Z \u8f74\u79fb\u52a8\u3002\r\n \/\/\u6839\u636e\u524d\u9762\u7684\u6b21\u5e8f\uff0c\u4e0b\u9762\u7684\u4ee3\u7801\u6cbf\u7740X\u8f74\u5de6\u79fb1.5\u4e2a\u5355\u4f4d\uff0cY\u8f74\u4e0d\u52a8(0.0f)\uff0c\u6700\u540e\u79fb\u5165\u5c4f\u5e556.0f\u4e2a\u5355\u4f4d\u3002\r\n \/\/\u6ce8\u610f\u5728glTranslatef(x, y, z)\u4e2d\u5f53\u60a8\u79fb\u52a8\u7684\u65f6\u5019\uff0c\u60a8\u5e76\u4e0d\u662f\u76f8\u5bf9\u5c4f\u5e55\u4e2d\u5fc3\u79fb\u52a8\uff0c\r\n \/\/\u800c\u662f\u76f8\u5bf9\u4e0e\u5f53\u524d\u6240\u5728\u7684\u5c4f\u5e55\u4f4d\u7f6e\u3002\r\n glTranslatef(-1.5, 0.0, -6.0); \/\/ \u5de6\u79fb 1.5 \u5355\u4f4d\uff0c\u5e76\u79fb\u5165\u5c4f\u5e55 6.0\r\n\r\n \/\/\u73b0\u5728\u6211\u4eec\u5df2\u7ecf\u79fb\u5230\u4e86\u5c4f\u5e55\u7684\u5de6\u534a\u90e8\u5206\uff0c\r\n \/\/\u5e76\u4e14\u5c06\u89c6\u56fe\u63a8\u5165\u5c4f\u5e55\u80cc\u540e\u8db3\u591f\u7684\u8ddd\u79bb\u4ee5\u4fbf\u6211\u4eec\u53ef\u4ee5\u770b\u89c1\u5168\u90e8\u7684\u573a\u666f\uff0d\u521b\u5efa\u4e09\u89d2\u5f62\u3002\r\n \/\/glBegin(GL_TRIANGLES)\u7684\u610f\u601d\u662f\u5f00\u59cb\u7ed8\u5236\u4e09\u89d2\u5f62\uff0cglEnd() \u544a\u8bc9OpenGL\u4e09\u89d2\u5f62\u5df2\u7ecf\u521b\u5efa\u597d\u4e86\u3002\r\n \/\/\u901a\u5e38\u60a8\u4f1a\u9700\u8981\u753b3\u4e2a\u9876\u70b9\uff0c\u53ef\u4ee5\u4f7f\u7528GL_TRIANGLES\u3002\r\n \/\/\u5728\u7edd\u5927\u591a\u6570\u7684\u663e\u5361\u4e0a\uff0c\u7ed8\u5236\u4e09\u89d2\u5f62\u662f\u76f8\u5f53\u5feb\u901f\u7684\u3002\r\n \/\/\u5982\u679c\u8981\u753b\u56db\u4e2a\u9876\u70b9\uff0c\u4f7f\u7528GL_QUADS\u7684\u8bdd\u4f1a\u66f4\u65b9\u4fbf\u3002\r\n \/\/\u4f46\u636e\u6211\u6240\u77e5\uff0c\u7edd\u5927\u591a\u6570\u7684\u663e\u5361\u90fd\u4f7f\u7528\u4e09\u89d2\u5f62\u6765\u4e3a\u5bf9\u8c61\u7740\u8272\u3002\r\n \/\/\u6700\u540e\uff0c\u5982\u679c\u60a8\u60f3\u8981\u753b\u66f4\u591a\u7684\u9876\u70b9\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528GL_POLYGON\u3002\r\n\r\n \/\/\u672c\u8282\u7684\u7b80\u5355\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u53ea\u753b\u4e00\u4e2a\u4e09\u89d2\u5f62\u3002\r\n \/\/\u5982\u679c\u8981\u753b\u7b2c\u4e8c\u4e2a\u4e09\u89d2\u5f62\u7684\u8bdd\uff0c\u53ef\u4ee5\u5728\u8fd9\u4e09\u70b9\u4e4b\u540e\uff0c\u518d\u52a0\u4e09\u884c\u4ee3\u7801(3\u70b9)\u3002\r\n \/\/\u6240\u6709\u516d\u70b9\u4ee3\u7801\u90fd\u5e94\u5305\u542b\u5728glBegin(GL_TRIANGLES) \u548c glEnd()\u4e4b\u95f4\u3002\r\n \/\/\u5728\u4ed6\u4eec\u4e4b\u95f4\u518d\u4e0d\u4f1a\u6709\u591a\u4f59\u7684\u70b9\u51fa\u73b0\uff0c\r\n \/\/\u4e5f\u5c31\u662f\u8bf4\uff0c(GL_TRIANGLES) \u548c glEnd()\u4e4b\u95f4\u7684\u70b9\u90fd\u662f\u4ee5\u4e09\u70b9\u4e3a\u4e00\u4e2a\u96c6\u5408\u7684\u3002\r\n \/\/\u8fd9\u540c\u6837\u9002\u7528\u4e8e\u56db\u8fb9\u5f62\u3002\u5982\u679c\u60a8\u77e5\u9053\u5b9e\u5728\u7ed8\u5236\u56db\u8fb9\u5f62\u7684\u8bdd\uff0c\r\n \/\/\u60a8\u5fc5\u987b\u5728\u7b2c\u4e00\u4e2a\u56db\u70b9\u4e4b\u540e\uff0c\u518d\u52a0\u4e0a\u56db\u70b9\u4e3a\u4e00\u4e2a\u96c6\u5408\u7684\u70b9\u7ec4\u3002\r\n \/\/\u53e6\u4e00\u65b9\u9762\uff0c\u591a\u8fb9\u5f62\u53ef\u4ee5\u7531\u4efb\u610f\u4e2a\u9876\u70b9\uff0c\r\n \/\/(GL_POLYGON)\u4e0d\u5728\u4e4eglBegin(GL_TRIANGLES) \u548c glEnd()\u4e4b\u95f4\u6709\u591a\u5c11\u884c\u4ee3\u7801\u3002\r\n\r\n \/\/ \u51e0\u4f55\u56fe\u5143\u7c7b\u578b\u548c\u8bf4\u660e\r\n \/\/ \u7c7b\u578b \u8bf4\u660e\r\n \/\/ GL_POINTS \u5355\u4e2a\u9876\u70b9\u96c6\r\n \/\/ GL_LINES \u591a\u7ec4\u53cc\u9876\u70b9\u7ebf\u6bb5\r\n \/\/ GL_POLYGON \u5355\u4e2a\u7b80\u5355\u586b\u5145\u51f8\u591a\u8fb9\u5f62\r\n \/\/ GL_TRAINGLES \u591a\u7ec4\u72ec\u7acb\u586b\u5145\u4e09\u89d2\u5f62\r\n \/\/ GL_QUADS \u591a\u7ec4\u72ec\u7acb\u586b\u5145\u56db\u8fb9\u5f62\r\n \/\/ GL_LINE_STRIP \u4e0d\u95ed\u5408\u6298\u7ebf\r\n \/\/ GL_LINE_LOOP \u95ed\u5408\u6298\u7ebf\r\n \/\/ GL_TRAINGLE_STRIP \u7ebf\u578b\u8fde\u7eed\u586b\u5145\u4e09\u89d2\u5f62\u4e32\r\n \/\/ GL_TRAINGLE_FAN \u6247\u5f62\u8fde\u7eed\u586b\u5145\u4e09\u89d2\u5f62\u4e32\r\n \/\/ GL_QUAD_STRIP \u8fde\u7eed\u586b\u5145\u56db\u8fb9\u5f62\u4e32\r\n\r\n \/\/glBegin\u4e4b\u540e\u7684\u7b2c\u4e00\u884c\u8bbe\u7f6e\u4e86\u591a\u8fb9\u5f62\u7684\u7b2c\u4e00\u4e2a\u9876\u70b9\uff0c\r\n \/\/glVertex \u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662fX\u5750\u6807\uff0c\u7136\u540e\u4f9d\u6b21\u662fY\u5750\u6807\u548cZ\u5750\u6807\u3002\r\n \/\/\u7b2c\u4e00\u4e2a\u70b9\u662f\u4e0a\u9876\u70b9\uff0c\u7136\u540e\u662f\u5de6\u4e0b\u9876\u70b9\u548c\u53f3\u4e0b\u9876\u70b9\u3002\r\n \/\/glEnd()\u544a\u8bc9OpenGL\u6ca1\u6709\u5176\u4ed6\u70b9\u4e86\u3002\r\n \/\/\u8fd9\u6837\u5c06\u663e\u793a\u4e00\u4e2a\u586b\u5145\u7684\u4e09\u89d2\u5f62\u3002\r\n\r\n \/\/\u8bd1\u8005\uff1a\u8fd9\u91cc\u8981\u6ce8\u610f\u7684\u662f\u5b58\u5728\u4e24\u79cd\u4e0d\u540c\u7684\u5750\u6807\u53d8\u6362\u65b9\u5f0f\uff0c\r\n \/\/glTranslatef(x, y, z)\u4e2d\u7684x, y, z\u662f\u76f8\u5bf9\u4e0e\u60a8\u5f53\u524d\u6240\u5728\u70b9\u7684\u4f4d\u79fb\uff0c\r\n \/\/\u4f46glVertex(x,y,z)\u662f\u76f8\u5bf9\u4e8eglTranslatef(x, y, z)\u79fb\u52a8\u540e\u7684\u65b0\u539f\u70b9\u7684\u4f4d\u79fb\u3002\r\n \/\/\u56e0\u800c\u8fd9\u91cc\u53ef\u4ee5\u8ba4\u4e3aglTranslate\u79fb\u52a8\u7684\u662f\u5750\u6807\u539f\u70b9\uff0cglVertex\u4e2d\u7684\u70b9\u662f\u76f8\u5bf9\u6700\u65b0\u7684\u5750\u6807\u539f\u70b9\u7684\u5750\u6807\u503c\u3002\r\n\r\n glBegin(GL_TRIANGLES); \/\/ \u7ed8\u5236\u4e09\u89d2\u5f62\r\n glVertex3f(0.0, 1.0, 0.0); \/\/ \u4e0a\u9876\u70b9\r\n glVertex3f(-1.0, -1.0, 0.0); \/\/ \u5de6\u4e0b\r\n glVertex3f(1.0, -1.0, 0.0); \/\/ \u53f3\u4e0b\r\n glEnd(); \/\/ \u4e09\u89d2\u5f62\u7ed8\u5236\u7ed3\u675f\r\n\r\n \/\/\u5728\u5c4f\u5e55\u7684\u5de6\u534a\u90e8\u5206\u753b\u5b8c\u4e09\u89d2\u5f62\u540e\uff0c\u6211\u4eec\u8981\u79fb\u5230\u53f3\u534a\u90e8\u5206\u6765\u753b\u6b63\u65b9\u5f62\u3002\r\n \/\/\u4e3a\u6b64\u8981\u518d\u6b21\u4f7f\u7528glTranslate\u3002\r\n \/\/\u8fd9\u6b21\u53f3\u79fb\uff0c\u6240\u4ee5X\u5750\u6807\u503c\u4e3a\u6b63\u503c\u3002\r\n \/\/\u56e0\u4e3a\u524d\u9762\u5de6\u79fb\u4e861.5\u4e2a\u5355\u4f4d\uff0c\r\n \/\/\u8fd9\u6b21\u8981\u5148\u5411\u53f3\u79fb\u56de\u5c4f\u5e55\u4e2d\u5fc3(1.5\u4e2a\u5355\u4f4d)\uff0c\u518d\u5411\u53f3\u79fb\u52a81.5\u4e2a\u5355\u4f4d\u3002\r\n \/\/\u603b\u5171\u8981\u5411\u53f3\u79fb3.0\u4e2a\u5355\u4f4d\u3002\r\n\r\n glTranslatef(3.0, 0.0, 0.0); \/\/ \u53f3\u79fb3\u5355\u4f4d\r\n\r\n \/\/\u73b0\u5728\u4f7f\u7528GL_QUADS\u7ed8\u5236\u6b63\u65b9\u5f62\u3002\r\n \/\/\u4e0e\u7ed8\u5236\u4e09\u89d2\u5f62\u7684\u4ee3\u7801\u76f8\u7c7b\u4f3c\uff0c\u753b\u56db\u8fb9\u5f62\u4e5f\u5f88\u7b80\u5355\u3002\r\n \/\/\u552f\u4e00\u7684\u533a\u522b\u662f\u7528GL_QUADS\u6765\u66ff\u6362\u4e86GL_TRIANGLES\u3002\r\n \/\/\u5e76\u589e\u52a0\u4e86\u4e00\u4e2a\u70b9\u3002\r\n \/\/\u6211\u4eec\u4f7f\u7528\u987a\u65f6\u9488\u6b21\u5e8f\u6765\u753b\u6b63\u65b9\u5f62\uff0d\u5de6\u4e0a\uff0d\u53f3\u4e0a\uff0d\u53f3\u4e0b\uff0d\u5de6\u4e0b\u3002\r\n \/\/\u91c7\u7528\u987a\u65f6\u9488\u7ed8\u5236\u7684\u662f\u5bf9\u8c61\u7684\u540e\u8868\u9762\u3002\u8fd9\u5c31\u662f\u8bf4\u6211\u4eec\u6240\u770b\u89c1\u7684\u662f\u6b63\u65b9\u5f62\u7684\u80cc\u9762\u3002\r\n \/\/\u9006\u65f6\u9488\u753b\u51fa\u6765\u7684\u6b63\u65b9\u5f62\u624d\u662f\u6b63\u9762\u671d\u7740\u6211\u4eec\u7684\u3002\r\n \/\/\u73b0\u5728\u6765\u8bf4\u5e76\u4e0d\u91cd\u8981\uff0c\u4f46\u4ee5\u540e\u60a8\u5fc5\u987b\u77e5\u9053\u3002\r\n glBegin(GL_QUADS); \/\/ \u7ed8\u5236\u6b63\u65b9\u5f62\r\n glVertex3f(-1.0, 1.0, 0.0); \/\/ \u5de6\u4e0a\r\n glVertex3f(1.0, 1.0, 0.0); \/\/ \u53f3\u4e0a\r\n glVertex3f(1.0, -1.0, 0.0); \/\/ \u5de6\u4e0b\r\n glVertex3f(-1.0, -1.0, 0.0); \/\/ \u53f3\u4e0b\r\n glEnd(); \/\/ \u6b63\u65b9\u5f62\u7ed8\u5236\u7ed3\u675f\r\n\r\n \/\/ Markus Knauer \u6ce8:\r\n \/\/\u5728 ("OpenGL Programming Guide: The Official Guide to Learning OpenGL, Release 1",\r\n \/\/J. Neider, T. Davis, M. Woo, Addison-Wesley, 1993)\r\n \/\/\u300aOpenGL\u7f16\u7a0b\u6307\u5357\uff1aOpenGL\u5b66\u4e60\u7684\u5b98\u65b9\u6307\u5357\uff0c\u7b2c\u4e00\u7248\u300b\r\n \/\/\u4e00\u4e66\u4e2d\u6e05\u695a\u7684\u89e3\u91ca\u4e86NeHe\u6240\u6307\u7684\u5728OpenGL\u4e2d\u79fb\u52a8\u7684\u5355\u4f4d\u6982\u5ff5\uff1a\r\n \/\/"\u5728OpenGL\u4e2d\u771f\u7684\u6709\u82f1\u5bf8\u548c\u82f1\u91cc\u7684\u533a\u522b\u5417\uff1f\r\n \/\/\u7b54\u6848\u662f\u4e00\u53e5\u8bdd\uff1a\u6ca1\u6709\u3002\u900f\u89c6\u548c\u5176\u4ed6\u7684\u53d8\u6362\u90fd\u662f\u65e0\u5355\u4f4d\u7684\u3002\r\n \/\/\u5982\u679c\u60a8\u60f3\u8981\u88c1\u526a\u57281.0\u523020.0\u7c73\uff0c\u82f1\u5bf8\u3001\u516c\u91cc\u7b49\u7b49\u4e4b\u95f4\u7684\u5e73\u9762\uff0c\r\n \/\/\u5728OpenGL\u4e2d\u60a8\u65e0\u6cd5\u505a\u5230\u3002\u552f\u4e00\u7684\u6cd5\u5219\u662f\u60a8\u5fc5\u987b\u4f7f\u7528\u4e00\u81f4\u7684\u5ea6\u91cf\u5355\u4f4d\u3002"\r\nEnd;\r\n<\/pre>\n\u8fd0\u884c\u4e00\u4e0b\u770b\u770b\u6548\u679c<\/p>\n","protected":false},"excerpt":{"rendered":"
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