Summary of

VOGLE Functions

B

TheVoglereference manual is available from the Internet site hosting this
book: http://dehesa.freeshel.org/vogle. The manual pages explain the
syntax and arguments of theVoglegraphics functions in C or C++,Fortran
77 ,andPascal. A summary is given in this appendix.

Setting up windows

prefposition(x, y) Specify preferred position

of the next window

prefsize(width, height) Specify preferred width and height

of the next window

Device control

vinit(device) Initialize the graphics device

For example, device can be “X11” or “postscript”

vexit() ExitVogle(last routine called)

and reset the window or terminal

voutput(”filotimo”) Redirect output fornextvinit

to file namedfilotimo

vnewdev(device) Reinitialize to use a new device

char * vgetdev(device) Returns the name of the current device

int getdepth() Returns the number of bit planes (color planes)

The number of colors displayable by the device

is 2 (nplanes−1).

Color

color(hroma) Set the current color: hroma can be:

BLACK, RED, GREEN, YELLOW

BLUE, MAGENTA, CYAN, WHITE

mapped as a structure to: 0, 1, ... 7

clear() Clear screen to current color

mapcolor(indx, red, green, blue) Set color map index