al_draw_spline(3) al_draw_spline(3)

al_draw_spline - Allegro 5 API

#include <allegro5/allegro_primitives.h>
void al_draw_spline(const float points[8], ALLEGRO_COLOR color, float thickness)

Draws a Bézier spline given 4 control points.


points - An array of 4 pairs of coordinates of the 4 control points
color - Color of the spline
thickness - Thickness of the spline, pass <= 0 to draw a hairline spline


Allegro reference manual