Mercurial > sdl-ios-xcode
view docs/man3/SDL_GL_GetProcAddress.3 @ 2427:32b9909db651 gsoc2008_iphone
changed macro MAX_G_FORCE to SDL_IPHONE_MAX_GFORCE and moved it to the SDL_config_iphoneos.h file. This should allow users to convert between the Sint16 returned by polling the joystick and units of g-force, which better describe what is going on with the iPhone (and are what the iPhone OS actually gives you). This conversion wouldn't be necessary except that we'd need floating point to store everything as g-force.
author | Holmes Futrell <hfutrell@umail.ucsb.edu> |
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date | Fri, 15 Aug 2008 00:46:58 +0000 |
parents | 546f7c1eb755 |
children | 1238da4a7112 |
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.TH "SDL_GL_GetProcAddress" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" .SH "NAME" SDL_GL_GetProcAddress \- Get the address of a GL function .SH "SYNOPSIS" .PP \fB#include "SDL\&.h" .sp \fBvoid *\fBSDL_GL_GetProcAddress\fP\fR(\fBconst char* proc\fR); .SH "DESCRIPTION" .PP Returns the address of the GL function \fBproc\fR, or \fBNULL\fR if the function is not found\&. If the GL library is loaded at runtime, with \fI\fBSDL_GL_LoadLibrary\fP\fR, then \fIall\fP GL functions must be retrieved this way\&. Usually this is used to retrieve function pointers to OpenGL extensions\&. .SH "EXAMPLE" .PP .nf \f(CWtypedef void (*GL_ActiveTextureARB_Func)(unsigned int); GL_ActiveTextureARB_Func glActiveTextureARB_ptr = 0; int has_multitexture=1; \&. \&. \&. /* Get function pointer */ glActiveTextureARB_ptr=(GL_ActiveTextureARB_Func) SDL_GL_GetProcAddress("glActiveTextureARB"); /* Check for a valid function ptr */ if(!glActiveTextureARB_ptr){ fprintf(stderr, "Multitexture Extensions not present\&. "); has_multitexture=0; } \&. \&. \&. \&. if(has_multitexture){ glActiveTextureARB_ptr(GL_TEXTURE0_ARB); \&. \&. } else{ \&. \&. }\fR .fi .PP .SH "SEE ALSO" .PP \fI\fBSDL_GL_LoadLibrary\fP\fR ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01