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al_calculate_spline(3alleg5) Allegro reference manual

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, corresponding 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(3alleg5), al_calculate_arc(3alleg5), al_calculate_ribbon(3alleg5)

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