clear_zbuffer(3alleg4) [v7 man page]

clear_zbuffer(3alleg4)						  Allegro manual					    clear_zbuffer(3alleg4)

NAME

       clear_zbuffer - Writes a depth value into the given Z-buffer. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       void clear_zbuffer(ZBUFFER *zbuf, float z);

DESCRIPTION

       Writes  z  into the given Z-buffer (0 means far away). This function should be used to initialize the Z-buffer before each frame. Actually,
       low-level routines compare depth of the current pixel with 1/z: for example, if you want to clip polygons farther than 10,  you	must  call
       clear_zbuffer(zbuf, 0.1).

SEE ALSO

       create_zbuffer(3alleg4), set_zbuffer(3alleg4), destroy_zbuffer(3alleg4), exzbuf(3alleg4)

Allegro 							   version 4.4.2					    clear_zbuffer(3alleg4)

exzbuf(3alleg4) 						  Allegro manual						   exzbuf(3alleg4)

NAME

       exzbuf - Z-buffered polygons demo. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       Example exzbuf

DESCRIPTION

       This  program demonstrates how to use Z-buffered polygons and floating point 3D math routines. It also provides a simple way to compute fps
       (frames per second) using a timer. After selecting a screen resolution through the standard GUI dialog, the  example  shows  two  3D  cubes
       rotating  and intersecting each other. Rather than having full polygons incorrectly overlap other polygons due to per-polygon sorting, each
       pixel is drawn at the correct depth.

SEE ALSO

       BITMAP(3alleg4), END_OF_FUNCTION(3alleg4), END_OF_MAIN(3alleg4), LOCK_FUNCTION(3alleg4),  LOCK_VARIABLE(3alleg4),  MATRIX_f(3alleg4),  PAL-
       ETTE(3alleg4),  POLYTYPE_GCOL(3alleg4),	SCREEN_H(3alleg4),  SCREEN_W(3alleg4),	V3D_f(3alleg4),  ZBUFFER(3alleg4), allegro_error(3alleg4),
       allegro_exit(3alleg4),	 allegro_init(3alleg4),    allegro_message(3alleg4),	 apply_matrix_f(3alleg4),     bitmap_color_depth(3alleg4),
       blit(3alleg4),  clear_bitmap(3alleg4),  clear_zbuffer(3alleg4),	create_bitmap(3alleg4), create_zbuffer(3alleg4), desktop_palette(3alleg4),
       destroy_bitmap(3alleg4),  destroy_zbuffer(3alleg4),   font(3alleg4),   get_transformation_matrix_f(3alleg4),   gfx_mode_select_ex(3alleg4),
       install_int(3alleg4),	 install_keyboard(3alleg4),	install_mouse(3alleg4),    install_timer(3alleg4),    keypressed(3alleg4),    pal-
       ette_color(3alleg4),   persp_project_f(3alleg4),   polygon_z_normal_f(3alleg4),	 quad3d_f(3alleg4),   readkey(3alleg4),   screen(3alleg4),
       set_color_depth(3alleg4),   set_gfx_mode(3alleg4),   set_palette(3alleg4),   set_palette_range(3alleg4),  set_projection_viewport(3alleg4),
       set_zbuffer(3alleg4), textprintf_ex(3alleg4), vsync(3alleg4)

Allegro 							   version 4.4.2						   exzbuf(3alleg4)