create_light_table

create_light_table(3alleg4)      Allegro manual      create_light_table(3alleg4)



NAME
       create_light_table - Fills a color mapping table for lighting effects.
       Allegro game programming library.

SYNOPSIS
       #include <allegro.h>


       void create_light_table(COLOR_MAP *table, const PALETTE pal, int r, g, b,
       void (*callback)(int pos));

DESCRIPTION
       Fills the specified color mapping table with lookup data for doing
       lighting effects with the specified palette. When combining the colors c1
       and c2 with this table, c1 is treated as a light level from 0-255. At
       light level 255 the table will output color c2 unchanged, at light level
       0 it will output the r, g, b value you specify to this function, and at
       intermediate light levels it will output a color somewhere between the
       two extremes. The r, g, and b values are in the range 0-63.

       This function will take advantage of the global rgb_ap variable to speed
       up color conversions. If the callback function is not NULL, it will be
       called 256 times during the calculation, allowing you to display a
       progress indicator. Example:

          COLOR_MAP light_table;
          ...
          /* Build a color lookup table for lighting effects. */
          create_light_table(&light_table, pal, 0, 0, 0, NULL);


SEE ALSO
       color_map(3alleg4), create_trans_table(3alleg4),
       create_color_table(3alleg4), create_blender_table(3alleg4),
       draw_trans_sprite(3alleg4), draw_lit_sprite(3alleg4),
       draw_gouraud_sprite(3alleg4), rgb_map(3alleg4), ex3d(3alleg4),
       exshade(3alleg4), extrans(3alleg4)



Allegro                           version 4.4.3      create_light_table(3alleg4)