#include <glib.h>

#include "animate.h"

double quadratic_bezier(double x, double a, double b, double c)
{
	g_assert(x >= 0 && x <= 1);
	g_assert(a >= 0 && a <= 1);
	g_assert(b >= 0 && b <= 1);
	g_assert(c >= 0 && c <= 1);

	const double t = 1 - x;
	return a * t * t + 2 * b * t * x + c * x * x;
}

double cubic_bezier(double x, double a, double b, double c, double d)
{
	g_assert(x >= 0 && x <= 1);
	g_assert(a >= 0 && a <= 1);
	g_assert(b >= 0 && b <= 1);
	g_assert(c >= 0 && c <= 1);
	g_assert(d >= 0 && d <= 1);

	const double t = 1 - x;
	return a * (t * t * t) + 3 * b * (t * t * x) + 3 * c * (t * x * x) + d * (x * x * x);
}

Animation *animation_create()
{
    Animation *anim = g_malloc0(sizeof(Animation));
    // TODO
    return anim;
}

void animation_destroy(Animation *anim)
{
    g_free(anim);
}

// vim: ts=4 sw=4 et