Allegro 5 api
#include <allegro5/allegro_primitives.h> void al_draw_ribbon(const float *points, int points_stride, ALLEGRO_COLOR color, float thickness, int num_segments)
Draws a series of straight lines given an array of points. The ribbon will go through all of the passed points.
Parameters:
points - An array of coordinate pairs (x and y) for each point
color - Color of the spline
thickness - Thickness of the spline, pass <= 0 to draw hairline spline
al_calculate_ribbon(3alleg5)