assets.cpp
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	#include "assets.h"

	using namespace symkit;

	#include <cmath>

	//fonction qui gère la coloration d'un objet selon sa vitesse
	color_s beta::colorGradientFunction(double energy, double limit)
	{
	/* Values in zero */
	color_s color = {1.0f / 32, 1.0f / 16, 1.0f, 1.0f};
	double ratio = energy / limit;

	if (ratio < 1)
	{
	color.red = pow(2, -5 * pow(ratio - 1, 2));

	double lambda = (ratio <= 1.0f / 3) ? -36 : - 45.0 / 4;

	color.green = pow(2, lambda * pow(ratio - 1.0f / 3, 2));

	if (ratio <= 0.5f)
	color.blue = pow(2, -20 * pow(ratio, 2));
	else
	color.blue = 1.0f / 32;

	} else {

	color.red = 1;
	color.green = 1.0f / 32;
	color.blue = 1.0f / 32;
	}

	return color; //retourne la couleur selon le protocol rouge, vert, bleu, alpha
	//où alpha represente le facteur de transparence de la couleur (de 0 à 1)
	}