gradient_definitions.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   gradient_definitions.c                             :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: tdarchiv <tdarchiv@student.42.fr>          +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2019/02/23 18:16:05 by tdarchiv          #+#    #+#             */
/*   Updated: 2019/02/23 21:01:39 by tdarchiv         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "gradient_definitions.h"

#include <stdlib.h>

t_gradient	create_blue_yellow(void)
{
	t_gradient gradient;

	gradient.step_count = 6;
	gradient.step = malloc(sizeof(t_grad_step) * gradient.step_count);
	gradient.step[0].treshold = 0;
	gradient.step[1].treshold = 0.2;
	gradient.step[2].treshold = 0.4;
	gradient.step[3].treshold = 0.6;
	gradient.step[4].treshold = 0.95;
	gradient.step[5].treshold = 1;
	gradient.step[0].color = (t_rgb){0, 0, 0.5};
	gradient.step[1].color = (t_rgb){0.12, 0.4, 0.78};
	gradient.step[2].color = (t_rgb){1, 1, 1};
	gradient.step[3].color = (t_rgb){1, 0.66, 0};
	gradient.step[4].color = (t_rgb){0, 0, 0};
	gradient.step[5].color = (t_rgb){0, 0, 0.5};
	return (gradient);
}

t_gradient	create_red_brown(void)
{
	t_gradient	gradient;

	gradient.step_count = 6;
	gradient.step = malloc(sizeof(t_grad_step) * gradient.step_count);
	gradient.step[0].treshold = 0;
	gradient.step[1].treshold = 0.2;
	gradient.step[2].treshold = 0.4;
	gradient.step[3].treshold = 0.6;
	gradient.step[4].treshold = 0.95;
	gradient.step[5].treshold = 1;
	gradient.step[0].color = (t_rgb){0.5, 0, 0};
	gradient.step[1].color = (t_rgb){0.78, 0.4, 0.12};
	gradient.step[2].color = (t_rgb){1, 1, 1};
	gradient.step[3].color = (t_rgb){0.66, 1, 0};
	gradient.step[4].color = (t_rgb){0, 0, 0};
	gradient.step[5].color = (t_rgb){0.5, 0, 0};
	return (gradient);
}

t_gradient	create_random(void)
{
	t_gradient	gradient;
	float		current_treshold;
	int			i;
	float		treshold_divider;

	gradient.step_count = 8 + rand() % 16;
	gradient.step = malloc(sizeof(t_grad_step) * gradient.step_count);
	i = 0;
	current_treshold = 0;
	while (i < gradient.step_count)
	{
		gradient.step[i].treshold = current_treshold;
		gradient.step[i].color = (t_rgb){
			(rand() % 256) / 256.,
			(rand() % 256) / 256.,
			(rand() % 256) / 256.};
		current_treshold += rand();
		i++;
	}
	treshold_divider = gradient.step[i - 1].treshold;
	i = 0;
	while (i < gradient.step_count)
		gradient.step[i++].treshold /= treshold_divider;
	gradient.step[i - 1].color = gradient.step[0].color;
	return (gradient);
}