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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_floor_cast.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:22:57 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:23:42 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <cub3d.h>
#include <stdint.h>
static void
ft_draw_plain_horizontal(t_rgb rgb, t_cub *cl, int32_t y, int32_t x)
{
*(int*)(cl->img.ptr +
(x * 4 + (y * cl->img.sizeline))) = ft_darken(rgb, cl);
}
static void
ft_draw_extra_tex(uint8_t tid, uint16_t y, uint16_t x, t_cub *cl)
{
float dist;
float calc;
dist = (cl->rlist.row_dist > 0) ? (cl->rlist.row_dist) : (0.0001);
calc = (dist * 0.1 * cl->mlist.darklvl);
calc = (calc >= 255) ? (255) : (calc);
calc = (calc < 1) ? (1) : (calc);
calc = (cl->mlist.darklvl > 0) ? (calc) : (1);
*(cl->img.ptr + x * 4 + (cl->img.sizeline * y)) =
(uint8_t)*(cl->tlist[tid].ptr + cl->tlist[tid].tex_x * 4 + 4 *
cl->tlist[tid].img_w * cl->tlist[tid].tex_y) / calc;
*(cl->img.ptr + x * 4 + (cl->img.sizeline * y) + 1) =
(uint8_t)*(cl->tlist[tid].ptr + cl->tlist[tid].tex_x * 4 + 4 *
cl->tlist[tid].img_w * cl->tlist[tid].tex_y + 1) / calc;
*(cl->img.ptr + x * 4 + (cl->img.sizeline * y) + 2) =
(uint8_t)*(cl->tlist[tid].ptr + cl->tlist[tid].tex_x * 4 + 4 *
cl->tlist[tid].img_w * cl->tlist[tid].tex_y + 2) / calc;
}
static void
ft_set_tex_xy(uint8_t tid, t_ray *rl, t_cub *cl)
{
cl->tlist[tid].tex_y = (int32_t)(cl->tlist[tid].img_w
* (rl->x_floor - rl->x_cell));
cl->tlist[tid].tex_x = (int32_t)(cl->tlist[tid].img_h
* (rl->y_floor - rl->y_cell));
cl->tlist[tid].tex_x = (cl->tlist[tid].tex_x > 0)
? (cl->tlist[tid].tex_x) : (-cl->tlist[tid].tex_x);
cl->tlist[tid].tex_y = (cl->tlist[tid].tex_y > 0)
? (cl->tlist[tid].tex_y) : (-cl->tlist[tid].tex_y);
}
static void
ft_floor_cast_loop(uint16_t y, uint16_t x, t_ray *rl, t_cub *cl)
{
rl->x_cell = (int32_t)(rl->x_floor);
rl->y_cell = (int32_t)(rl->y_floor);
if (cl->mlist.isftex)
{
ft_set_tex_xy(6, rl, cl);
}
if (cl->mlist.isctex)
{
ft_set_tex_xy(7, rl, cl);
}
if (cl->mlist.isftex)
ft_draw_extra_tex(6, y, x, cl);
else
ft_draw_plain_horizontal(cl->f_rgb, cl, y, x);
if (cl->mlist.isctex && !cl->mlist.isskybox)
ft_draw_extra_tex(7, cl->wlist.y_size - y - 1, x, cl);
else if (!cl->mlist.isctex && !cl->mlist.isskybox)
ft_draw_plain_horizontal(cl->c_rgb, cl, cl->wlist.y_size - y - 1, x);
}
void
ft_floor_cast(t_cub *cl)
{
t_ray *rl;
uint16_t x;
uint16_t y;
rl = &cl->rlist;
y = (cl->wlist.y_size / 2);
while (y < cl->wlist.y_size)
{
ft_floor_cast_inits(y, rl, cl);
x = 0;
while (x < cl->wlist.x_size)
{
if (cl->rlist.wall_bz[x] <= y)
{
ft_floor_cast_loop(y, x, rl, cl);
}
rl->x_floor += cl->mlist.x_floor_step;
rl->y_floor += cl->mlist.y_floor_step;
x++;
}
y++;
}
}
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