Resets all global state attributes to their initial values.
FORTRAN (libfgl.a)
void greset( )
SUBROUTINE GRESET
The greset subroutine resets all global state attributes to their initial values. This subroutine can be called at any time to reset the attributes.
The following table lists the global state attributes:
| Global State Attributes | |
| Attribute | Initial Value |
| backface mode | off |
| blinking | off |
| buffer mode | single |
| color | undefined |
| color map mode | one map |
| concave | off |
| cursor | 0 (arrow) |
| depth range | -0x800000,+0x7FFFFF (On Supergraphics Processor Subsystem: 0x0,0x1FFFFF) |
| depthcue mode | off |
| display mode | color map |
| drawmode | NORMALDRAW |
| font | 0 |
| linestyle | 0 (solid) |
| linewidth | 1 pixel |
| logical operation | LO_SRC |
| lsrepeat | 1 |
| pattern | 0 (solid) |
| picking size | 10x10 pixels |
| RGB color | undefined |
| RGB shaderange | undefined |
| RGB writemask | undefined |
| shademodel | GOURAUD |
| shaderange | 0,7,-0x800000,+0x7FFFFF (On Supergraphics Processor Subsystem: 0x0,0x1FFFFF) |
| viewport | entire window |
| writemask | all planes enabled |
| z-buffer mode | off |
Note: Font 0 (zero) is a Helvetica-like font.
The greset subroutine puts a 2-D orthographic projection transformation on the matrix stack with left, right, bottom, and top set to the boundaries of the screen. The subroutine also turns on the cursor and ties it to MOUSEX and MOUSEY.
The greset subroutine removes all button, valuator, and keyboard entries from the event queue and discards them. Each button is set to FALSE and untied from valuators. Each valuator (and in particular MOUSEX) is set to XMAXSCREEN/2 with range 0 to XMAXSCREEN. MOUSEY is set to YMAXSCREEN/2 and has range 0 to YMAXSCREEN.
The greset subroutine also defines certain entries in the color map, as follows:
| Color Map Entries | |||
| RGB Value | |||
| Name | Red | Green | Blue |
| BLACK | 0 | 0 | 0 |
| RED | 255 | 0 | 0 |
| GREEN | 0 | 255 | 0 |
| YELLOW | 255 | 255 | 0 |
| BLUE | 0 | 0 | 255 |
| MAGENTA | 255 | 0 | 255 |
| CYAN | 0 | 255 | 255 |
| WHITE | 255 | 255 | 255 |
Note: This subroutine cannot be used to add to a display list.
The example C language program vlsi.c uses the greset subroutine to reset all global attributes on any keyboard event.
This subroutine is part of GL in the AIXwindows Environment/6000 Version 1, Release 2 with AIXwindows/3D Feature.
| /usr/include/gl/gl.h | Contains C language constant and variable type definitions for GL. |
| /usr/include/gl/fgl.h | Contains FORTRAN constant and variable type definitions for GL. |
Reconfiguring the graphics system with the gconfig subroutine.
Initializing the graphics system with the ginit subroutine.
Creating a new window with the winopen subroutine.
Controlling Queues and Devices, Creating a Cursor, Understanding the Hardware Used by GL, Setting Drawing Attributes, Windows and Input Control Overview, Working with Coordinate Systems.
Configuring the Frame Buffer, Clearing, Resetting, and Initializing GL.