Allegro 5 api
#include <allegro5/allegro_primitives.h> void al_draw_line(float x1, float y1, float x2, float y2, ALLEGRO_COLOR color, float thickness)
Draws a line segment between two points.
Parameters:
x1, y1, x2, y2 - Start and end points of the line
color - Color of the line
thickness - Thickness of the line, pass <= 0 to draw hairline lines
al_draw_soft_line(3alleg5)