ÇáÓáÇã Úáíßã ¡ ÃÎæÇäí ÑÃíÊ ÃÓÆáÉ ÚÏíÏÉ Íæá åÐÇ ÇáãæÖæÚ æáÐÇ ÞÑÑÊ ÔÑÍå ÈÈÓÇØÉ ÔÏíÏÉ:

ÊÚÊÈÑ OpenGL ãä ÇáãßÊÈÇÊ ÇáÓåáÉ ÇáÊØæíÑ æÇáÇãÊÏÇÏ. ÍíË Ãäå íãßä ÊØæíÑ æÙÇÆÝíÉ OpenGL ÝÞØ ÈÇÓÊÎÏÇã ÇãÊÏÇÏÇÊåÇ æåÐÇ ãÇ íÝÓÑ ÏÚã OpenGL áÃÍÏË ÇáÍíá ÇáÑÓæãíÉ ÞÈá Ãí ãßÊÈÉ ÃÎÑì !!!!!!!

ßíÝ íÊã ÊæËíÞ ÇãÊÏÇÏÇÊ OpenGL

íÊã ÊÚÑíÝ ÇãÊÏÇÏÊ OpenGL æÐáß ÈæÇÓØÉ æÇÕÝ ÇáÇãÊÏÇÏ. æÇÕÝ ÇáÇãÊÏÇÏ ÚÈÇÑÉ Úä ãáÝ äÕí. íãßäß ÇáæÕæá Åáì ÇáÞÇÆãÉ ÇáßÇãáÉ ãä ÇãÊÏÇÏÇÊ OpenGL ãä ÎáÇá ãæÞÚ SGI ¡ æåæ ÇáãØæÑ ÇáÑÆíÓí áÜ OpenGL:
http://oss.sgi.com/p...sample/registry

åÐå ÇáæÇÕÝÇÊ áã ÊßÊÈ Úáì Ôßá ÃãËáÉ ÈÑãÌíÉ ¡ áßä ÇáãÈÑãÌ æãä ÎáÇá ÞÑÇÁÉ ÇáæÇÕÝ íÓÊØíÚ ÈæÖæÍ Ãä íÚáã ßíÝíÉ ÇÓÊÎÏÇã ÃÍÏ åÐå ÇáÇãÊÏÇÏÇÊ.

ÇÓÊÎÏÇã ÇãÊÏÇÏÇÊ OpenGL

äÍä äÊÍÏË ÇáÂä Úä ÇãÊÏÇÏ æÙÇÆÝí áÜ OpenGL ¡ áÐáß ÏÚäÇ äÊÃßÏ ÝÞØ ãä Ãä åÐå ÇáæÙÇÆÝíÉ ÛíÑ ãæÌæÏÉ ÃÕáÇð Öãä ãßÊÈÉ OpenGL ÇáÞíÇÓíÉ. æáåÐÇ ÇáÓÈÈ ¡ æáÇÓÊÎÏÇã ÇãÊÏÇÏ ãÇ ÚáíäÇ ÊåíÆÉ ÈÚÖ ÇáÈÇÑÇãÊÑÇÊ æÇáæÙÇÆÝ æÐáß ÈÇÓÊÎÏÇã ãÄÔÑ ÇáæÙíÝÉ Ãæ (Function Pointer). æßãËÇá Úáì ÚãáíÉ ÇáÊåíÆÉ ÓæÝ ÃÓÊÎÏã ÇáÇãÊÏÇÏ ãä äæÚ "EXT_point_parameter". æÓæÝ ÊÈÏà ÇáÎØæÇÊ Úáì ÇáÔßá ÇáÊÇáí:

ÇáÎØæÉ ÇáÃæáì

ÃæáÇð ¡ ÚáíäÇ ÇáÊÕÑíÍ Úä åíßá ÇáæÙíÝÉ ¡ æåæ äÝÓå ÇáãæÌæÏ Ýí æÇÕÝ ÇáÇãÊÏÇÏ:

typedef void (APIENTRY * PFNGLPOINTPARAMETERFEXTPROC)(GLenum pname, GLfloat param);
typedef void (APIENTRY * PFNGLPOINTPARAMETERFVEXTPROC)(GLenum pname, const Glfloat *params);

PFNGLPOINTPARAMETERFEXTPROC    glPointParameterfEXT;
PFNGLPOINTPARAMETERFVEXTPROC   glPointParameterfvEXT;

// This function returns true (1) if the extension is there.
int isExtensionSupported(const char *extstring)
{
    char *s = (char*) glGetString(GL_EXTENSIONS); //Get our extension-string
    char *temp = strstr(s, extstring);            //Is our extension a string?
    return temp != NULL;                          //Return false.
}

// Check if the extension is there.
int hasPointParams = isExtensionSupported("GL_EXT_point_parameters");

// Initialize the extension-functions.
#ifdef _WIN32    // for windows only

if (hasPointParams)
{
    glPointParameterfEXT = (PFNGLPOINTPARAMETERFEXTPROC) wglGetProcAddress("glPointParameterfEXT");
    glPointParameterfvEXT = (PFNGLPOINTPARAMETERFVEXTPROC) wglGetProcAddress("glPointParameterfvEXT");
}

#endif

if (hasPointParams) // If the extension is available
{
    static float quadratic[3] = { 0.25, 0.0, 1/60.0 };
    glPointParameterfvEXT(GL_DISTANCE_ATTENUATION_EXT, quadratic);
    glPointParameterfEXT(GL_POINT_FADE_THRESHOLD_SIZE_EXT, 1.0);
}

RenderScene();