{"id":645,"date":"2009-09-22T12:43:00","date_gmt":"2009-09-22T04:43:00","guid":{"rendered":""},"modified":"2013-11-17T17:07:12","modified_gmt":"2013-11-17T09:07:12","slug":"opengl%e6%95%99%e7%a8%8bdelphi%e7%89%888-%e7%ae%80%e5%8d%95%e7%9a%84%e9%80%8f%e6%98%8e","status":"publish","type":"post","link":"https:\/\/kyle.ai\/blog\/645.html","title":{"rendered":"openGL\u6559\u7a0bdelphi\u7248(8)&#8212;-\u7b80\u5355\u7684\u900f\u660e"},"content":{"rendered":"<pre class=\"brush: delphi; title: ; notranslate\" title=\"\">\r\n{\r\n\u7b80\u5355\u7684\u900f\u660e\r\nOpenGL\u4e2d\u7684\u7edd\u5927\u591a\u6570\u7279\u6548\u90fd\u4e0e\u67d0\u4e9b\u7c7b\u578b\u7684(\u8272\u5f69)\u6df7\u5408\u6709\u5173\u3002\r\n\u6df7\u8272\u7684\u5b9a\u4e49\u4e3a\uff0c\u5c06\u67d0\u4e2a\u8c61\u7d20\u7684\u989c\u8272\u548c\u5df2\u7ed8\u5236\u5728\u5c4f\u5e55\u4e0a\u4e0e\u5176\u5bf9\u5e94\u7684\u8c61\u7d20\u989c\u8272\u76f8\u4e92\u7ed3\u5408\u3002\r\n\u81f3\u4e8e\u5982\u4f55\u7ed3\u5408\u8fd9\u4e24\u4e2a\u989c\u8272\u5219\u4f9d\u8d56\u4e8e\u989c\u8272\u7684alpha\u901a\u9053\u7684\u5206\u91cf\u503c\uff0c\u4ee5\u53ca\/\u6216\u8005\u6240\u4f7f\u7528\u7684\u6df7\u8272\u51fd\u6570\u3002\r\nAlpha\u901a\u5e38\u662f\u4f4d\u4e8e\u989c\u8272\u503c\u672b\u5c3e\u7684\u7b2c4\u4e2a\u989c\u8272\u7ec4\u6210\u5206\u91cf\u3002\r\n\u524d\u9762\u8fd9\u4e9b\u8bfe\u6211\u4eec\u90fd\u662f\u7528GL_RGB\u6765\u6307\u5b9a\u989c\u8272\u7684\u4e09\u4e2a\u5206\u91cf\u3002\r\n\u76f8\u5e94\u7684GL_RGBA\u53ef\u4ee5\u6307\u5b9aalpha\u5206\u91cf\u7684\u503c\u3002\r\n\u66f4\u8fdb\u4e00\u6b65\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528glColor4f()\u6765\u4ee3\u66ffglColor3f()\u3002\r\n\r\n\u7edd\u5927\u591a\u6570\u4eba\u90fd\u8ba4\u4e3aAlpha\u5206\u91cf\u4ee3\u8868\u6750\u6599\u7684\u900f\u660e\u5ea6\u3002\r\n\u8fd9\u5c31\u662f\u8bf4\uff0calpha\u503c\u4e3a0.0\u65f6\u6240\u4ee3\u8868\u7684\u6750\u6599\u662f\u5b8c\u5168\u900f\u660e\u7684\u3002\r\nalpha\u503c\u4e3a1.0\u65f6\u6240\u4ee3\u8868\u7684\u6750\u6599\u5219\u662f\u5b8c\u5168\u4e0d\u900f\u660e\u7684\u3002\r\n\r\n\u6df7\u8272\u7684\u516c\u5f0f\r\n\u82e5\u60a8\u5bf9\u6570\u5b66\u4e0d\u611f\u5192\uff0c\u800c\u53ea\u60f3\u770b\u770b\u5982\u4f55\u5b9e\u73b0\u900f\u660e\uff0c\u8bf7\u8df3\u8fc7\u8fd9\u4e00\u8282\u3002\r\n\u82e5\u60a8\u60f3\u6df1\u5165\u7406\u89e3(\u8272\u5f69)\u6df7\u5408\u7684\u5de5\u4f5c\u539f\u7406\uff0c\u8fd9\u4e00\u8282\u5e94\u8be5\u9002\u5408\u60a8\u5427\u3002\r\n\u300eCKER\u7684\u8865\u5145:\u5176\u5b9e\u5e76\u4e0d\u96be^-^\u3002\u539f\u6587\u4e2d\u7684\u516c\u5f0f\u5982\u4e0b\uff0cCKER\u518d\u5520\u53e8\u4e00\u4e0b\u5427\u3002\r\n\u5176\u5b9e\u6df7\u5408\u7684\u57fa\u672c\u539f\u7406\u662f\u5c31\u5c06\u8981\u5206\u8272\u7684\u56fe\u50cf\u5404\u8c61\u7d20\u7684\u989c\u8272\u4ee5\u53ca\u80cc\u666f\u989c\u8272\u5747\u6309\u7167RGB\u89c4\u5219\u5404\u81ea\u5206\u79bb\u4e4b\u540e\uff0c\r\n\u6839\u636e\uff0d\u56fe\u50cf\u7684RGB\u989c\u8272\u5206\u91cf*alpha\u503c+\u80cc\u666f\u7684RGB\u989c\u8272\u5206\u91cf*(1-alpha\u503c)\r\n\uff0d\u8fd9\u6837\u4e00\u4e2a\u7b80\u5355\u516c\u5f0f\u6765\u6df7\u5408\u4e4b\u540e\uff0c\u6700\u540e\u5c06\u6df7\u5408\u5f97\u5230\u7684RGB\u5206\u91cf\u91cd\u65b0\u5408\u5e76\u3002\u300f\r\n\r\n\u516c\u5f0f\u5982\u4e0b\uff1a\r\n(Rs Sr + Rd Dr, Gs Sg + Gd Dg, Bs Sb + Bd Db, As Sa + Ad Da)\r\nOpenGL\u6309\u7167\u4e0a\u9762\u7684\u516c\u5f0f\u8ba1\u7b97\u8fd9\u4e24\u4e2a\u8c61\u7d20\u7684\u6df7\u8272\u7ed3\u679c\u3002\r\n\u5c0f\u5199\u7684s\u548cr\u5206\u522b\u4ee3\u8868\u6e90\u8c61\u7d20\u548c\u76ee\u6807\u8c61\u7d20\u3002\u5927\u5199\u7684S\u548cD\u5219\u662f\u76f8\u5e94\u7684\u6df7\u8272\u56e0\u5b50\u3002\r\n\u8fd9\u4e9b\u51b3\u5b9a\u4e86\u60a8\u5982\u4f55\u5bf9\u8fd9\u4e9b\u8c61\u7d20\u6df7\u8272\u3002\r\n\u7edd\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u5404\u989c\u8272\u901a\u9053\u7684alpha\u6df7\u8272\u503c\u5927\u5c0f\u76f8\u540c\uff0c\r\n\u8fd9\u6837\u5bf9\u6e90\u8c61\u7d20\u5c31\u6709 (As, As, As, As)\uff0c\r\n\u76ee\u6807\u8c61\u7d20\u5219\u67091, 1, 1, 1) - (As, As, As, As)\u3002\r\n\u4e0a\u9762\u7684\u516c\u5f0f\u5c31\u6210\u4e86\u4e0b\u9762\u7684\u6a21\u6837:\r\n(Rs As + Rd (1 - As), Gs As + Gd (1 - As), Bs As + Bs (1 - As), As As + Ad (1 - As))\r\n\u8fd9\u4e2a\u516c\u5f0f\u4f1a\u751f\u6210\u900f\u660e\/\u534a\u900f\u660e\u7684\u6548\u679c\u3002\r\n\r\nOpenGL\u4e2d\u7684\u6df7\u8272\r\n\u5728OpenGL\u4e2d\u5b9e\u73b0\u6df7\u8272\u7684\u6b65\u9aa4\u7c7b\u4f3c\u4e8e\u6211\u4eec\u4ee5\u524d\u63d0\u5230\u7684OpenGL\u8fc7\u7a0b\u3002\r\n\u63a5\u7740\u8bbe\u7f6e\u516c\u5f0f\uff0c\u5e76\u5728\u7ed8\u5236\u900f\u660e\u5bf9\u8c61\u65f6\u5173\u95ed\u5199\u6df1\u5ea6\u7f13\u5b58\u3002\r\n\u56e0\u4e3a\u6211\u4eec\u60f3\u5728\u534a\u900f\u660e\u7684\u56fe\u5f62\u80cc\u540e\u7ed8\u5236 \u5bf9\u8c61\u3002\r\n\u8fd9\u4e0d\u662f\u6b63\u786e\u7684\u6df7\u8272\u65b9\u6cd5\uff0c\u4f46\u7edd\u5927\u591a\u6570\u65f6\u5019\u8fd9\u79cd\u505a\u6cd5\u5728\u7b80\u5355\u7684\u9879\u76ee\u4e2d\u90fd\u5de5\u4f5c\u7684\u5f88\u597d\u3002\r\n\r\nRui Martins \u7684\u8865\u5145\uff1a \u6b63\u786e\u7684\u6df7\u8272\u8fc7\u7a0b\u5e94\u8be5\u662f\u5148\u7ed8\u5236\u5168\u90e8\u7684\u573a\u666f\u4e4b\u540e\u518d\u7ed8\u5236\u900f\u660e\u7684\u56fe\u5f62\u3002\r\n\u5e76\u4e14\u8981\u6309\u7167\u4e0e\u6df1\u5ea6\u7f13\u5b58\u76f8\u53cd\u7684\u6b21\u5e8f\u6765\u7ed8\u5236(\u5148\u753b\u6700\u8fdc\u7684\u7269\u4f53)\u3002\r\n\u8003\u8651\u5bf9\u4e24\u4e2a\u591a\u8fb9\u5f62(1\u548c2)\u8fdb\u884calpha\u6df7\u5408\uff0c\u4e0d\u540c\u7684\u7ed8\u5236\u6b21\u5e8f\u4f1a\u5f97\u5230\u4e0d\u540c\u7684\u7ed3\u679c\u3002\r\n(\u8fd9\u91cc\u5047\u5b9a\u591a\u8fb9\u5f621\u79bb\u89c2\u5bdf\u8005\u6700\u8fd1\uff0c\u90a3\u4e48\u6b63\u786e\u7684\u8fc7\u7a0b\u5e94\u8be5\u5148\u753b\u591a\u8fb9\u5f622\uff0c\u518d\u753b\u591a\u8fb9\u5f621\u3002\r\n\u6b63\u5982\u60a8\u518d\u73b0\u5b9e\u4e2d\u6240\u89c1\u5230\u7684\u90a3\u6837\uff0c\r\n\u4ece\u8fd9\u4e24\u4e2a&lt;\u900f\u660e\u7684&gt;\u591a\u8fb9\u5f62\u80cc\u540e\u7167\u5c04\u6765\u7684\u5149\u7ebf\u603b\u662f\u5148\u7a7f\u8fc7\u591a\u8fb9\u5f622\uff0c\r\n\u518d\u7a7f\u8fc7\u591a\u8fb9\u5f621\uff0c\u6700\u540e\u624d\u5230\u8fbe\u89c2\u5bdf\u8005\u7684\u773c\u775b\u3002)\r\n\u5728\u6df1\u5ea6\u7f13\u5b58\u542f\u7528\u65f6\uff0c\u60a8\u5e94\u8be5\u5c06\u900f\u660e\u56fe\u5f62\u6309\u7167\u6df1\u5ea6\u8fdb\u884c\u6392\u5e8f\uff0c\r\n\u5e76\u5728\u5168\u90e8\u573a\u666f\u7ed8\u5236\u5b8c\u6bd5\u4e4b\u540e\u518d\u7ed8\u5236\u8fd9\u4e9b\u900f\u660e\u7269\u4f53\u3002\u5426\u5219\u60a8\u5c06\u5f97\u5230\u4e0d\u6b63\u786e\u7684\u7ed3\u679c\u3002\r\n\u6211\u77e5\u9053\u67d0\u4e9b\u65f6\u5019\u8fd9\u6837\u505a\u662f\u5f88\u4ee4\u4eba\u75db\u82e6\u7684\uff0c\u4f46\u8fd9\u662f\u6b63\u786e\u7684\u65b9\u6cd5\u3002\r\n\r\n\u6211\u4eec\u5c06\u4f7f\u7528\u7b2c\u4e03\u8bfe\u7684\u4ee3\u7801\u3002\r\n\u4e00\u5f00\u59cb\u5148\u5728\u4ee3\u7801\u5f00\u59cb\u5904\u589e\u52a0\u4e24\u4e2a\u65b0\u7684\u53d8\u91cf\u3002\u51fa\u4e8e\u6e05\u6670\u8d77\u89c1\uff0c\u6211\u91cd\u5199\u4e86\u6574\u6bb5\u4ee3\u7801\u3002\r\n\r\n}\r\nVar\r\n   h_RC             : HGLRC;            \/\/ Rendering Context(\u7740\u8272\u63cf\u8ff0\u8868)\u3002\r\n   h_DC             : HDC;              \/\/ Device Context(\u8bbe\u5907\u63cf\u8ff0\u8868)\r\n   h_Wnd            : HWND;             \/\/ \u7a97\u53e3\u53e5\u67c4\r\n   h_Instance       : HINST;            \/\/ \u7a0b\u5e8fInstance(\u5b9e\u4f8b)\u3002\r\n   keys             : Array&#x5B;0..255] Of Boolean; \/\/ \u7528\u4e8e\u952e\u76d8\u4f8b\u7a0b\u7684\u6570\u7ec4\r\n\r\n   light            : Boolean;          \/\/ \u5149\u6e90\u7684\u5f00\/\u5173\r\n\r\n   blend            : Boolean;          \/\/ Blending OFF\/ON? ( \u65b0\u589e )\r\n\r\n   lp               : Boolean;          \/\/ L\u952e\u6309\u4e0b\u4e86\u4e48?\r\n   fp               : Boolean;          \/\/ F\u952e\u6309\u4e0b\u4e86\u4e48?\r\n\r\n   bp               : Boolean;          \/\/ B \u952e\u6309\u4e0b\u4e86\u4e48? ( \u65b0\u589e )\r\n\r\n   xrot             : GLfloat;          \/\/ X \u65cb\u8f6c\r\n   yrot             : GLfloat;          \/\/ Y \u65cb\u8f6c\r\n   xspeed           : GLfloat;          \/\/ X \u65cb\u8f6c\u901f\u5ea6\r\n   yspeed           : GLfloat;          \/\/ Y \u65cb\u8f6c\u901f\u5ea6\r\n\r\n   z                : GLfloat = -5.0 f; \/\/ \u6df1\u5165\u5c4f\u5e55\u7684\u8ddd\u79bb\r\n   LightAmbient     : Array&#x5B;0..3] Of GLfloat = (0.5, 0.5, 0.5, 1.0);  \/\/\u73af\u5883\u5149\u53c2\u6570 ( \u65b0\u589e )\r\n   LightDiffuse     : Array&#x5B;0..3] Of GLfloat = (1.0, 1.0, 1.0, 1.0);  \/\/ \u6f2b\u5c04\u5149\u53c2\u6570 ( \u65b0\u589e )\r\n   LightPosition    : Array&#x5B;0..3] Of GLfloat = (0.0, 0.0, 2.0, 1.0);  \/\/ \u5149\u6e90\u4f4d\u7f6e ( \u65b0\u589e )\r\n   filter           : GLuint;           \/\/ \u6ee4\u6ce2\u7c7b\u578b\r\n   texture          : Array&#x5B;0..2] Of GLuint; \/\/ 3\u79cd\u7eb9\u7406\u7684\u50a8\u5b58\u7a7a\u95f4\r\n\r\nProcedure glGenTextures(n: GLsizei; Var textures: GLuint); stdcall; external\r\n   opengl32;\r\n\r\nProcedure glBindTexture(target: GLenum; texture: GLuint); stdcall; external\r\n   opengl32;\r\n\r\nFunction gluBuild2DMipmaps(target: GLenum; components, width, height: GLint;\r\n   format, atype: GLenum; data: Pointer): Integer; stdcall; external glu32 name\r\n   'gluBuild2DMipmaps';\r\n\r\n{\r\n\u7136\u540e\u5f80\u4e0b\u79fb\u52a8\u5230 LoadGLTextures() \u8fd9\u91cc\u3002\r\n\u627e\u5230 if (TextureImage&#x5B;0]=LoadBMP('Data\/Crate.bmp'))\r\n\u8fd9\u4e00\u884c\u3002\u6211\u4eec\u73b0\u5728\u4f7f\u7528\u6709\u8272\u73bb\u7483\u7eb9\u7406\u6765\u4ee3\u66ff\u4e0a\u4e00\u8bfe\u4e2d\u7684\u6728\u7bb1\u7eb9\u7406\u3002\r\nif (TextureImage&#x5B;0]=LoadBMP(&quot;Data\/glass.bmp&quot;)); \/\/ \u8f7d\u5165\u73bb\u7483\u4f4d\u56fe ( \u5df2\u4fee\u6539 )\r\n}\r\n\r\nFunction LoadTexture: boolean;          \/\/ \u8f7d\u5165\u4f4d\u56fe\u5e76\u8f6c\u6362\u6210\u7eb9\u7406\r\nVar\r\n   Status           : boolean;          \/\/ Status \u6307\u793a\u5668\r\n   TextureImage     : Array&#x5B;0..1] Of PTAUX_RGBImageRec; \/\/ \u521b\u5efa\u7eb9\u7406\u7684\u5b58\u50a8\u7a7a\u95f4\r\nBegin\r\n   Status := false;\r\n   ZeroMemory(@TextureImage, sizeof(TextureImage)); \/\/ \u5c06\u6307\u9488\u8bbe\u4e3a NULL\r\n   TextureImage&#x5B;0] := LoadBMP('Walls.bmp');\r\n   If TextureImage&#x5B;0] &lt;&gt; Nil Then\r\n      Begin\r\n         Status := TRUE;                \/\/ \u5c06 Status \u8bbe\u4e3a TRUE\r\n         glGenTextures(1, texture&#x5B;0]);  \/\/ \u521b\u5efa\u7eb9\u7406\r\n         \/\/ \u521b\u5efa Nearest \u6ee4\u6ce2\u8d34\u56fe\r\n         glBindTexture(GL_TEXTURE_2D, texture&#x5B;0]);\r\n         \/\/ \u751f\u6210\u7eb9\u7406\r\n         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);  \/\/ ( \u65b0\u589e )\r\n         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);  \/\/ ( \u65b0\u589e )\r\n\r\n         glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage&#x5B;0].sizeX,\r\n            TextureImage&#x5B;0].sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE,\r\n            TextureImage&#x5B;0].data);\r\n         glBindTexture(GL_TEXTURE_2D, texture&#x5B;1]);  \/\/ \u4f7f\u7528\u6765\u81ea\u4f4d\u56fe\u6570\u636e\u751f\u6210 \u7684\u5178\u578b\u7eb9\u7406\r\n         \/\/ \u751f\u6210\u7eb9\u7406\r\n         glTexImage2D(GL_TEXTURE_2D, 0, 3, TextureImage&#x5B;0].sizeX,\r\n            TextureImage&#x5B;0].sizeY, 0, GL_RGB, GL_UNSIGNED_BYTE,\r\n            TextureImage&#x5B;0].data);\r\n         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);  \/\/ \u7ebf\u5f62\u6ee4\u6ce2\r\n         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);  \/\/ \u7ebf\u5f62\u6ee4\u6ce2\r\n         \/\/ \u521b\u5efa MipMapped \u7eb9\u7406\r\n         glBindTexture(GL_TEXTURE_2D, texture&#x5B;2]);\r\n         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);\r\n         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,\r\n            GL_LINEAR_MIPMAP_NEAREST);  \/\/ ( \u65b0\u589e )\r\n         gluBuild2DMipmaps(GL_TEXTURE_2D, 3, TextureImage&#x5B;0].sizeX,\r\n            TextureImage&#x5B;0].sizey, GL_RGB, GL_UNSIGNED_BYTE,\r\n            TextureImage&#x5B;0].data);      \/\/(\u65b0\u589e)  }\r\n      End;\r\n   If assigned(TextureImage&#x5B;0]) Then    \/\/ \u7eb9\u7406\u662f\u5426\u5b58\u5728\r\n      If assigned(TextureImage&#x5B;0].data) Then \/\/ \u7eb9\u7406\u56fe\u50cf\u662f\u5426\u5b58\u5728\r\n         TextureImage&#x5B;0].data := Nil;   \/\/ \u91ca\u653e\u7eb9\u7406\u56fe\u50cf\u5360\u7528\u7684\u5185\u5b58\r\n   TextureImage&#x5B;0] := Nil;              \/\/ \u91ca\u653e\u56fe\u50cf\u7ed3\u6784\r\n   result := Status;                    \/\/ \u8fd4\u56de Status\r\nEnd;\r\n\r\n{\r\n\u5728glInit()\u4ee3\u7801\u6bb5\u52a0\u5165\u4ee5\u4e0b\u4e24\u884c\u3002\r\n\u7b2c\u4e00\u884c\u4ee5\u5168\u4eae\u5ea6\u7ed8\u5236\u6b64\u7269\u4f53\uff0c\u5e76\u5bf9\u5176\u8fdb\u884c50%\u7684alpha\u6df7\u5408(\u534a\u900f\u660e)\u3002\r\n\u5f53\u6df7\u5408\u9009\u9879\u6253\u5f00\u65f6\uff0c\u6b64\u7269\u4f53\u5c06\u4f1a\u4ea7\u751f50%\u7684\u900f\u660e\u6548\u679c\u3002\r\n\u7b2c\u4e8c\u884c\u8bbe\u7f6e\u6240\u91c7\u7528\u7684\u6df7\u5408\u7c7b\u578b\u3002\r\n\r\nRui Martins \u7684\u8865\u5145:\r\nalpha\u901a\u9053\u7684\u503c\u4e3a 0.0\u610f\u5473\u7740\u7269\u4f53\u6750\u8d28\u662f\u5b8c\u5168\u900f\u660e\u7684\u3002\r\n1.0 \u5219\u610f\u5473\u7740\u5b8c\u5168\u4e0d\u900f\u660e\u3002\r\n}\r\n\r\nProcedure glInit();                     \/\/ \u6b64\u5904\u5f00\u59cb\u5bf9OpenGL\u8fdb\u884c\u6240\u6709\u8bbe\u7f6e\r\nBegin\r\n   If (Not LoadTexture) Then            \/\/ \u8c03\u7528\u7eb9\u7406\u8f7d\u5165\u5b50\u4f8b\u7a0b\r\n      exit;                             \/\/ \u5982\u679c\u672a\u80fd\u8f7d\u5165\uff0c\u9000\u51fa\r\n\r\n   glEnable(GL_TEXTURE_2D);             \/\/ \u542f\u7528\u7eb9\u7406\u6620\u5c04\r\n   glShadeModel(GL_SMOOTH);             \/\/ \u542f\u7528\u9634\u5f71\u5e73\u6ed1\r\n   glClearColor(0.0, 0.0, 0.0, 0.0);    \/\/ \u9ed1\u8272\u80cc\u666f\r\n   glClearDepth(1.0);                   \/\/ \u8bbe\u7f6e\u6df1\u5ea6\u7f13\u5b58\r\n   glEnable(GL_DEPTH_TEST);             \/\/ \u542f\u7528\u6df1\u5ea6\u6d4b\u8bd5\r\n   glDepthFunc(GL_LESS);                \/\/ \u6240\u4f5c\u6df1\u5ea6\u6d4b\u8bd5\u7684\u7c7b\u578b\r\n   glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); \/\/\u9ad8\u5ea6\u4f18\u5316\u7684\u900f\u89c6\u6295\u5f71\u8ba1\u7b97\r\n   glLightfv(GL_LIGHT1, GL_AMBIENT, @LightAmbient&#x5B;0]); \/\/ \u8bbe\u7f6e\u73af\u5883\u5149\r\n   glLightfv(GL_LIGHT1, GL_DIFFUSE, @LightDiffuse&#x5B;0]); \/\/ \u8bbe\u7f6e\u6f2b\u5c04\u5149\r\n   glLightfv(GL_LIGHT1, GL_POSITION, @LightPosition); \/\/ \u5149\u6e90\u4f4d\u7f6e\r\n   glEnable(GL_LIGHT1);                 \/\/ \u542f\u7528\u4e00\u53f7\u5149\u6e90\r\n\r\n   glColor4f(1.0, 1.0, 1.0, 0.5);       \/\/ \u5168\u4eae\u5ea6\uff0c 50% Alpha \u6df7\u5408( \u65b0\u589e )\r\n   glBlendFunc(GL_SRC_ALPHA, GL_ONE); \/\/ \u57fa\u4e8e\u6e90\u8c61\u7d20alpha\u901a\u9053\u503c\u7684\u534a\u900f\u660e\u6df7\u5408\u51fd\u6570 ( \u65b0\u589e )\r\n\r\nEnd;\r\n\r\n {\u5728\u63a5\u8fd1\u7b2c\u4e03\u8bfe\u7ed3\u5c3e\u5904\u7684\u5730\u65b9\u627e\u5230\u4e0b\u9762\u7684\u4ee3\u7801\u6bb5\u3002\r\n                  If keys&#x5B;VK_LEFT] Then    \/\/Left\u65b9\u5411\u952e\u6309\u4e0b\u4e86\u4e48?\r\n                  yspeed := yspeed - 0.01; \/\/\u82e5\u662f, \u51cf\u5c11yspeed\r\n                \u63a5\u7740\u4e0a\u9762\u7684\u4ee3\u7801\uff0c\u6211\u4eec\u589e\u52a0\u5982\u4e0b\u7684\u4ee3\u7801\u3002\r\n                \u8fd9\u51e0\u884c\u76d1\u89c6B\u952e\u662f\u5426\u6309\u4e0b\u3002\r\n                \u5982\u679c\u662f\u7684\u8bdd\uff0c\u8ba1\u7b97\u673a\u68c0\u67e5\u6df7\u5408\u9009\u9879\u662f\u5426\u5df2\u7ecf\u6253\u5f00\u3002\r\n                \u7136\u540e\u5c06\u5176\u7f6e\u4e3a\u76f8\u53cd\u7684\u72b6\u6001\u3002\r\n                }\r\n               If (keys&#x5B;ord('B')] And Not bp) Then \/\/B \u5065\u6309\u4e0b\u4e14bp\u4e3a FALSE\u4e48?\r\n                  Begin\r\n                     bp := TRUE;        \/\/ \u82e5\u662f\uff0c bp \u8bbe\u4e3a TRUE\r\n                     blend := Not blend; \/\/ \u5207\u6362\u6df7\u5408\u9009\u9879\u7684 TRUE \/ FALSE\r\n                     If (blend) Then    \/\/ \u6df7\u5408\u6253\u5f00\u4e86\u4e48?\r\n                        Begin\r\n                           glEnable(GL_BLEND); \/\/ \u6253\u5f00\u6df7\u5408\r\n                           glDisable(GL_DEPTH_TEST); \/\/ \u5173\u95ed\u6df1\u5ea6\u6d4b\u8bd5\r\n                        End\r\n                     Else               \/\/ \u5426\u5219\r\n                        Begin\r\n                           glDisable(GL_BLEND); \/\/ \u5173\u95ed\u6df7\u5408\r\n                           glEnable(GL_DEPTH_TEST); \/\/ \u6253\u5f00\u6df1\u5ea6\u6d4b\u8bd5\r\n                        End;\r\n                  End;\r\n               If (Not keys&#x5B;ord('B')]) Then \/\/  B \u952e\u677e\u5f00\u4e86\u4e48?\r\n                  Begin\r\n                     bp := FALSE;       \/\/ \u82e5\u662f\uff0c bp\u8bbe\u4e3a FALSE\r\n                  End;\r\n               {\r\n               \u4f46\u662f\u600e\u6837\u624d\u80fd\u5728\u4f7f\u7528\u7eb9\u7406\u8d34\u56fe\u7684\u65f6\u5019\u6307\u5b9a\u6df7\u5408\u65f6\u7684\u989c\u8272\u5462?\u5f88\u7b80\u5355\uff0c\r\n               \u5728\u8c03\u6574\u8d34\u56fe\u6a21\u5f0f\u65f6\uff0c\u6587\u7406\u8d34\u56fe\u7684\u6bcf\u4e2a\u8c61\u7d20\u70b9\u7684\u989c\u8272\u90fd\u662f\u7531alpha\u901a\u9053\u53c2\u6570\r\n               \u4e0e\u5f53\u524d\u5730\u8c61\u7d20\u989c\u8272\u76f8\u4e58\u6240\u5f97\u5230\u7684\u3002\r\n               \u6bd4\u5982\uff0c\u7ed8\u5236\u7684\u989c\u8272\u662f (0.5, 0.6, 0.4),\r\n               \u6211\u4eec\u4f1a\u628a\u989c\u8272\u76f8\u4e58\u5f97\u5230(0.5, 0.6, 0.4, 0.2)\r\n                (alpha\u53c2\u6570\u5728\u6ca1\u6709\u6307\u5b9a\u65f6\uff0c\u7f3a\u7701\u4e3a\u96f6)\u3002\r\n               \u5c31\u662f\u5982\u6b64\uff01OpenGL\u5b9e\u73b0Alpha\u6df7\u5408\u7684\u786e\u5f88\u7b80\u5355\uff01\r\n               }\r\n               {\r\n                \u539f\u6587\u6ce8 (11\/13\/99)\r\n                \u6211(NeHe)\u6df7\u8272\u4ee3\u7801\u8fdb\u884c\u4e86\u4fee\u6539\uff0c\u4ee5\u4f7f\u663e\u793a\u7684\u7269\u4f53\u770b\u8d77\u6765\u66f4\u903c\u771f\u3002\r\n                \u540c\u65f6\u5bf9\u6e90\u8c61\u7d20\u548c\u76ee\u7684\u8c61\u7d20\u4f7f\u7528alpha\u53c2\u6570\u6765\u6df7\u5408\uff0c\u4f1a\u5bfc\u81f4\u7269\u4f53\u7684\u4eba\u9020\u75d5\u8ff9\u770b\u8d77\u6765\u5f88\u660e\u663e\u3002\r\n                \u4f1a\u4f7f\u5f97\u7269\u4f53\u7684\u80cc\u9762\u6cbf\u7740\u4fa7\u9762\u7684\u5730\u65b9\u663e\u5f97\u66f4\u6697\u3002\r\n                \u57fa\u672c\u4e0a\u7269\u4f53\u4f1a\u770b\u8d77\u6765\u5f88\u602a\u5f02\u3002\r\n                \u6211\u6240\u7528\u7684\u6df7\u8272\u65b9\u6cd5\u4e5f\u8bb8\u4e0d\u662f\u6700\u597d\u7684\uff0c\u4f46\u7684\u786e\u80fd\u591f\u5de5\u4f5c\u3002\r\n                \u542f\u7528\u5149\u6e90\u4e4b\u540e\uff0c\u7269\u4f53\u770b\u8d77\u6765\u5f88\u903c\u771f\u3002\r\n                \u611f\u8c22Tom\u63d0\u4f9b\u7684\u539f\u59cb\u4ee3\u7801\uff0c\u4ed6\u91c7\u7528\u7684\u6df7\u8272\u65b9\u6cd5\u662f\u6b63\u786e\u7684\uff0c\r\n                \u4f46\u7269\u4f53\u770b\u8d77\u6765\u5e76\u4e0d\u8c61\u6240\u671f\u671b\u7684\u90a3\u6837\u5438\u5f15\u4eba:)\r\n                \u4ee3\u7801\u6240\u4f5c\u7684\u518d\u6b21\u4fee\u6539\u662f\u56e0\u4e3a\u5728\u67d0\u4e9b\u663e\u5361\u4e0aglDepthMask()\u51fd\u6570\u5b58\u5728\u5bfb\u5740\u95ee\u9898\u3002\r\n                \u8fd9\u6761\u547d\u4ee4\u5728\u67d0\u4e9b\u5361\u4e0a\u542f\u7528\u6216\u5173\u95ed\u6df1\u5ea6\u7f13\u51b2\u6d4b\u8bd5\u65f6\u4f3c\u4e4e\u4e0d\u662f\u5f88\u6709\u6548\uff0c\r\n                \u6240\u4ee5\u6211\u5df2\u7ecf\u5c06\u542f\u7528\u6216\u5173\u95ed\u6df1\u5ea6\u7f13\u51b2\u6d4b\u8bd5\u7684\u4ee3\u7801\u8f6c\u6210\u8001\u5f0f\u7684glEnable\u548cglDisable\u3002\r\n\r\n                \u7eb9\u7406\u8d34\u56fe\u7684Alpha\u6df7\u5408\r\n                \u7528\u4e8e\u7eb9\u7406\u8d34\u56fe\u7684alpha\u53c2\u6570\u53ef\u4ee5\u8c61\u989c\u8272\u4e00\u6837\u4ece\u95ee\u9898\u8d34\u56fe\u4e2d\u8bfb\u53d6\u3002\r\n                \u65b9\u6cd5\u5982\u4e0b\uff0c\u60a8\u9700\u8981\u5728\u8f7d\u5165\u6240\u9700\u7684\u6750\u8d28\u540c\u65f6\u53d6\u5f97\u5176\u7684alpha\u53c2\u6570\u3002\r\n                \u7136\u540e\u5728\u8c03\u7528glTexImage2D()\u65f6\u4f7f\u7528GL_RGBA\u7684\u989c\u8272\u683c\u5f0f\u3002\r\n               }\r\n\r\n\/\/\u8fd0\u884c\u4e00\u4e0b\u770b\u770b\u6548\u679c\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>{ \u7b80\u5355\u7684\u900f\u660e OpenGL\u4e2d\u7684\u7edd\u5927\u591a\u6570\u7279\u6548\u90fd\u4e0e\u67d0\u4e9b\u7c7b\u578b\u7684(\u8272\u5f69)\u6df7\u5408\u6709\u5173\u3002 \u6df7\u8272\u7684\u5b9a\u4e49\u4e3a\uff0c\u5c06\u67d0\u4e2a\u8c61\u7d20\u7684\u989c\u8272\u548c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-645","post","type-post","status-publish","format-standard","hentry","category-code_related"],"_links":{"self":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/645","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/comments?post=645"}],"version-history":[{"count":1,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/645\/revisions"}],"predecessor-version":[{"id":4722,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/posts\/645\/revisions\/4722"}],"wp:attachment":[{"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/media?parent=645"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/categories?post=645"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kyle.ai\/blog\/wp-json\/wp\/v2\/tags?post=645"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}