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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* helper.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/01/11 07:32:20 by cacharle #+# #+# */
/* Updated: 2020/02/04 02:17:38 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "cub3d.h"
t_bool helper_is_player_cell(t_cell cell)
{
return (cell == CELL_LOOK_NORTH || cell == CELL_LOOK_SOUTH ||
cell == CELL_LOOK_WEST || cell == CELL_LOOK_EAST);
}
void helper_free_splited(char **splited)
{
int i;
if (splited == NULL)
return ;
i = -1;
while (splited[++i] != NULL)
free(splited[i]);
free(splited);
}
void helper_rotate_player(t_state *state, double rotation)
{
state->dir = vector_rotate(state->dir, rotation);
state->plane = vector_rotate(state->plane, rotation);
}
/*
** Initial player direction vector
** Since the map [0 0] is in the top left corner
** the north/south direction are slipped.
** The camera plane has to stay perpendicular to the direction and
** create a camera with a 66 degree angle (which is a recommended angle for fps)
*/
void helper_init_dir_plane(t_state *state, int y, int x)
{
if (state->map[y][x] == CELL_LOOK_NORTH)
state->dir.y = -1.0;
else if (state->map[y][x] == CELL_LOOK_SOUTH)
state->dir.y = 1.0;
else if (state->map[y][x] == CELL_LOOK_WEST)
state->dir.x = -1.0;
else if (state->map[y][x] == CELL_LOOK_EAST)
state->dir.x = 1.0;
state->plane = vector_rotate(state->dir, M_PI_2);
state->plane = vector_scale(state->plane, 1.0 / vector_norm(state->plane));
state->plane = vector_scale(state->plane, 0.66);
}
t_bool state_init_sprites(t_state *state)
{
int i;
int j;
int counter;
counter = 0;
i = -1;
while (++i < state->map_height)
{
j = -1;
while (++j < state->map_width)
if (state->map[i][j] == CELL_ITEM)
counter++;
}
state->sprites_num = counter;
if ((state->sprites = malloc(sizeof(t_sprite) * counter)) == NULL)
return (FALSE);
while (i-- > 0)
{
j = -1;
while (++j < state->map_width)
if (state->map[i][j] == CELL_ITEM)
state->sprites[--counter].pos =
vector_new((double)j + 0.5, (double)i + 0.5);
}
return (TRUE);
}
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