Name
glutInit — initialize the GLUT library.
C Specification
void glutInit
| ( | int *argcp
, char **argv
); |
Python Specification
glutInit
| ( |
argcp
,
argv
) →
None
|
Parameters
-
argcp
-
A pointer to the program's unmodified argc variable from main. Upon return, the
value pointed to by argcp will be updated, because glutInit
extracts any command line options intended for the GLUT library.
-
argv
-
The program's unmodified argv variable from main. Like argcp,
the data for argv will be updated because glutInit extracts any
command line options understood by the GLUT library.
Description
glutInit will initialize the GLUT library and negotiate a session with the window system. During
this process, glutInit may cause the termination of the GLUT program with an error message to the
user if GLUT cannot be properly initialized. Examples of this situation include the failure to connect to the window
system, the lack of window system support for OpenGL, and invalid command line options.
glutInit also processes command line options, but the specific options parse are window system
dependent.
X Implementation Notes
The X Window System specific options parsed by glutInit are as follows:
-
-display DISPLAY
-
Specify the X server to connect to. If not specified, the value of the DISPLAY environment variable is used.
-
-geometry WxH+X+Y
-
Determines where window's should be created on the screen. The emphasis following -geometry should be
formatted as a standard X geometry specification. The effect of using this option is to change the GLUT
initial size and initial position the same as if glutInitWindowSize or glutInitWindowPosition were called directly.
-
-iconic
-
Requests all top-level windows be created in an iconic state.
-
-indirect
-
Force the use of indirect OpenGL rendering contexts.
-
-direct
-
Force the use of direct OpenGL rendering contexts (not all GLX implementations support direct rendering
contexts). A fatal error is generated if direct rendering is not supported by the OpenGL implementation. If
neither -indirect or -direct are used to force a particular behavior, GLUT will attempt to use direct
rendering if possible and otherwise fallback to indirect rendering.
-
-gldebug
-
After processing callbacks and/or events, check if there are any OpenGL errors by calling glGetError. If an error is reported, print out a warning by looking up the
error code with gluErrorString. Using this option is helpful in
detecting OpenGL run-time errors.
-
-sync
-
Enable synchronous X protocol transactions. This option makes it easier to track down potential X protocol
errors.