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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_draw_sprite_extra.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/24 20:22:45 by rbousset #+# #+# */
/* Updated: 2020/03/09 18:56:01 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <libft.h>
#include <cub3d.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
void
ft_sprite_height(t_cub *cl, t_sprite *sprite)
{
sprite->spriteheight = abs((int)(cl->wlist.y_size / (sprite->transformy)));
sprite->drawstarty = -sprite->spriteheight / 2 + cl->wlist.y_size / 2;
if (sprite->drawstarty < 0)
sprite->drawstarty = 0;
sprite->drawendy = sprite->spriteheight / 2 + cl->wlist.y_size / 2;
if (sprite->drawendy >= (int)cl->wlist.y_size)
sprite->drawendy = cl->wlist.y_size - 1;
}
void
ft_sprite_width(t_cub *cl, t_sprite *sprite)
{
sprite->spritewidth = abs((int)(cl->wlist.x_size / (sprite->transformy)));
sprite->drawstartx = -sprite->spritewidth / 2 + sprite->spritescreenx;
if (sprite->drawstartx < 0)
sprite->drawstartx = 0;
sprite->drawendx = sprite->spritewidth / 2 + sprite->spritescreenx;
if (sprite->drawendx >= (int)cl->wlist.x_size)
sprite->drawendx = cl->wlist.x_size - 1;
}
static void
ft_init_sprite(t_cub *cl, t_sprite *sprite)
{
sprite->invdet = 1.0 / (cl->plist.plane_x * cl->plist.dir_y
- cl->plist.dir_x * cl->plist.plane_y);
sprite->transformx = sprite->invdet * (cl->plist.dir_y * sprite->spritex
- cl->plist.dir_x * sprite->spritey);
sprite->transformy = sprite->invdet * (-cl->plist.plane_y * sprite->spritex
+ cl->plist.plane_x * sprite->spritey);
sprite->spritescreenx = (int)(cl->wlist.x_size / 2) *
(1 + sprite->transformx / sprite->transformy);
}
void
ft_calc_sprite(t_cub *cl)
{
t_sprite sprite;
int32_t i;
int32_t j;
i = 0;
j = 0;
ft_sort_sprites(cl);
while (j < cl->mlist.sprite_var)
{
while (i < cl->mlist.sprite_nbr)
{
sprite = cl->sprites[j][cl->mlist.sprite_order[j][i]];
sprite.current_sprite = (j == 0) ? 4 : j + 7;
sprite.spritey = sprite.s_pos_x - (cl->plist.pos_x - 0.5);
sprite.spritex = sprite.s_pos_y - (cl->plist.pos_y - 0.5);
ft_init_sprite(cl, &sprite);
ft_sprite_height(cl, &sprite);
ft_sprite_width(cl, &sprite);
ft_draw_sprite(cl, &sprite);
i++;
}
i = 0;
j++;
}
}
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