LIBBV 3 BRL-CAD BRL-CAD
libbv BRL-CAD view graphics interface subroutines
void `pl_3box` FILE *fp int x0 int y0 int z0 int x1 int y1 int z1 void `pl_3cont` FILE *fp int x int y int z void `pl_3line` FILE *fp int x0 int y0 int z0 int x1 int y1 int z1 void `pl_3move` FILE *fp int x int y int z void `pl_3point` FILE *fp int x int y int z void `pl_3space` FILE *fp int x0 int y0 int z0 int x1 int y1 int z1 void `pl_arc` FILE *fp int xc int yc int x0 int y0 int x1 int y1 void `pl_box` FILE *fp int x0 int y0 int x1 int y1 `pl_circle` FILE *fp int x int y int r void `pl_color` FILE *fp int r int g int b void `pl_cont` FILE *fp int x int y void `pl_erase` FILE *fp void `pl_label` FILE *fp const char *s void `pl_line` FILE *fp int x0 int y0 int x1 int y1 void `pl_linmod` FILE *fp const char *s void `pl_move` FILE *fp int x int y void `pl_point` FILE *fp int x int y void `pl_space` FILE *fp int x0 int y0 int x1 int y1

## DESCRIPTION

These subroutines generate graphic output commands for processing with the plot(1) plotting filters. They are slightly more general than those in libplot as these take a file pointer. They also include the BRL 3-D extensions to the plot intermediate code.

Pl_space or pl_3space must be used before any of the graphic primitives to declare the amount of space necessary. See plot3(5).

Pl_box or pl_3box draws a box between the two given opposite points. The ''pen'' will be left at the second point.

Pl_circle draws a circle of radius r with center at the point (x, `y`). Note that circle and arc cannot be transformed in three space if one is using a filter to do that.

Pl_arc draws an arc of a circle with center at the point (x, `y`) between the points (x0, y0) and (x1, `y1`).

String arguments to pl_label and pl_linmod are terminated by nulls and do not contain new-lines.

There are also 2-D and 3_D double-precision versions, with arguments identical to their counterparts above. The naming conventions are to change the prefix to "pd"; examples are thus pd_point and pd_3point. Vector versions for 3_D (also double-precision) are prefixed "pdv", as in pdv_3point.

See plot3(5) and plot(5) for a description of the effect of the remaining functions.

## FILES

/usr/brlcad/lib/libbv`.`a produces output for plot 1G filters

## WARNINGS

In order to compile a program containing these functions in file.c it is necessary to use ``cc file.c -lplot3''.

Color specification and three-dimensional primitives are BRL extensions to the "unix plot" language that are not generally found on other systems.

## SEE ALSO

plot 1, pl-fb 1, plot3 5, plot 5

## AUTHOR

BRL-CAD Team

## COPYRIGHT

This software is Copyright (c) 1989-2024 by the United States Government as represented by U.S. Army Research Laboratory.

## BUG REPORTS

Reports of bugs or problems should be submitted via electronic mail to devs@brlcad.org