69 lines
2.3 KiB
69 lines
2.3 KiB
3 years ago
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/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* raycast.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: narnaud <narnaud@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2022/08/23 09:27:55 by narnaud #+# #+# */
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/* Updated: 2022/08/23 16:03:32 by narnaud ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../../includes/cub3d.h"
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void check_side(t_rc *rc)
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{
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if (rc->sDist[0] > rc->sDist[1])
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rc->side = 1;
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else
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rc->side = 0;
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}
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void init_ray(t_env *env, t_rc *rc)
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{
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if (rc->vec.x == 0)
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rc->dDist[0] = 1e30;
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else
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rc->dDist[0] = fabs(1 / rc->vec.x);
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if (rc->vec.y == 0)
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rc->dDist[1] = 1e30;
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else
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rc->dDist[1] = fabs(1 / rc->vec.y);
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if (rc->vec.x < 0 && --rc->step[0])
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rc->sDist[0] = (env->playerPos.x - rc->cell[0]) * rc->dDist[0];
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else if (++rc->step[0])
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rc->sDist[0] = (rc->cell[0] + 1.0 - env->playerPos.x) * rc->dDist[0];
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if (rc->vec.y < 0 && --rc->step[1])
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rc->sDist[1] = (env->playerPos.y - rc->cell[1]) * rc->dDist[1];
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else if (++rc->step[1])
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rc->sDist[1] = (rc->cell[1] + 1.0 - env->playerPos.y) * rc->dDist[1];
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}
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int ray_hit(t_env *env, t_rc *rc)
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{
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check_side(rc);
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rc->cell[rc->side] += rc->step[rc->side];
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if (env->map[rc->cell[1]][rc->cell[0]] > '0')
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{
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if (env->map[rc->cell[1]][rc->cell[0]] == '1')
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rc->tex = 3 - rc->side * 2 - (rc->step[rc->side] + 1) / 2;
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else if (env->map[rc->cell[1]][rc->cell[0]] == '2' && rc->tex != 4)
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rc->tex = 4;
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else
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return (0);
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if (!rc->side)
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rc->wallX = env->playerPos.y + rc->sDist[rc->side] * rc->vec.y;
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else
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rc->wallX = env->playerPos.x + rc->sDist[rc->side] * rc->vec.x;
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rc->wallX -= floor(rc->wallX);
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if (rc->tex != 4 || 2 * rc->wallX - dvec_len((t_dvec){\
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rc->cell[0] - env->playerPos.x, \
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rc->cell[1] - env->playerPos.y}) < -2)
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return (1);
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}
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else
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rc->tex = 0;
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return (0);
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}
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