man polygon () - Draws a filled polygon. Allegro game programming library.
NAME
polygon - Draws a filled polygon. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void polygon(BITMAP *bmp, int vertices, const int *points, int color);
DESCRIPTION
Draws a filled polygon with an arbitrary number of corners. Pass the number of vertices and an array containing a series of x, y points (a total of vertices*2 values). Example:
int points[12] = { 50, 50, 100, 100, 100, 150,
50, 200, 0, 150, 0, 100 };
...
clear_to_color(screen, makecol(255, 255, 255));
polygon(screen, 6, points, makecol(0, 0, 0));