42_cube3D/game/utils.c

/* ************************************************************************** */
/*                                                                            */
/*                                                        :::      ::::::::   */
/*   utils.c                                            :+:      :+:    :+:   */
/*                                                    +:+ +:+         +:+     */
/*   By: erey-bet <marvin@42.fr>                    +#+  +:+       +#+        */
/*                                                +#+#+#+#+#+   +#+           */
/*   Created: 2023/05/11 14:19:16 by erey-bet          #+#    #+#             */
/*   Updated: 2023/06/16 17:45:58 by erey-bet         ###   ########.fr       */
/*                                                                            */
/* ************************************************************************** */

#include "game.h"

double	ft_abs(double nb)
{
	if (nb < 0)
		return (-nb);
	return (nb);
}

unsigned int	get_rgba(int r, int g, int b, int a)
{
	return (r << 24 | g << 16 | b << 8 | a);
}

static uint32_t	switch_color_bytes(uint32_t color)
{
	return (((color & 0xff) << 24) | (((color >> 8) & 0xff) << 16)
		| (((color >> 16) & 0xff) << 8) | color >> 24);
}

uint32_t	get_pixel_color(mlx_texture_t *texture, uint32_t x, uint32_t y)
{
	return (switch_color_bytes(*(uint32_t *)(texture->pixels
			+ (y * texture->width + x) * texture->bytes_per_pixel)));
}

int	get_texture_side(t_dda *dda)
{
	if (dda->side == 0 && dda->step_x < 0)
		return (3);
	if (dda->side == 0 && dda->step_x > 0)
		return (1);
	if (dda->side == 1 && dda->step_y < 0)
		return (2);
	if (dda->side == 1 && dda->step_y > 0)
		return (0);
	return (0);
}