al_calculate_spline man page on DragonFly

al_calculate_spline man page on DragonFly

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al_calculate_spline(3)					al_calculate_spline(3)

NAME
       al_calculate_spline - Allegro 5 API

SYNOPSIS
	      #include <allegro5/allegro_primitives.h>

	      void al_calculate_spline(float* dest, int stride, float points[8],
		 float thickness, int num_segments)

DESCRIPTION
       Calculates  a Bézier spline given 4 control points.  If thickness <= 0,
       then num_segments of points are required in the destination,  otherwise
       twice  as  many	are  needed.  The destination buffer should consist of
       regularly spaced (by distance of stride bytes) doublets of floats, cor‐
       responding to x and y coordinates of the vertices.

       Parameters:

       · dest - The destination buffer

       · stride	 -  Distance  (in bytes) between starts of successive pairs of
	 coordinates

       · points - An array of 4 pairs of coordinates of the 4 control points

       · thickness - Thickness of the spline ribbon

       · num_segments - The number of points to calculate

SEE ALSO
       al_draw_spline(3), al_calculate_arc(3), al_calculate_ribbon(3)

Allegro reference manual				al_calculate_spline(3)

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