57 lines
1.9 KiB
C
57 lines
1.9 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* rt_calculate_ray.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: scebula <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2017/01/03 15:47:59 by scebula #+# #+# */
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/* Updated: 2017/01/03 15:48:01 by scebula ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "rt.h"
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static t_vect calculate_ray_dir(t_data *d, double x, double y,
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t_thread *thread)
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{
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double xindent;
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double yindent;
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t_vect ray_dir;
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t_vect left;
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t_vect up;
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if (thread)
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xindent = d->cam.plane_width / d->width * (thread->x + x *
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(1 / d->aa_lvl));
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else
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xindent = d->cam.plane_width / d->width * (x * (1 / d->aa_lvl));
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if (thread)
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yindent = d->cam.plane_height / d->height * (thread->y + y *
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(1 / d->aa_lvl));
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else
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yindent = d->cam.plane_height / d->height * (y * (1 / d->aa_lvl));
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ray_dir = d->cam.first_pixel_dir;
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left = d->cam.left;
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mult_vector(&left, xindent);
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up = d->cam.up;
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mult_vector(&up, yindent * -1);
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substract_to_vector(&ray_dir, left);
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add_to_vector(&ray_dir, up);
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normalize_vector(&ray_dir);
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return (ray_dir);
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}
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t_ray calculate_ray(t_data *d, double x, double y,
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t_thread *thread)
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{
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t_vect cam_ray_dir;
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t_vect cam_ray_ori;
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t_ray cam_ray;
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cam_ray_dir = calculate_ray_dir(d, x, y, thread);
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cam_ray_ori = d->cam.pos;
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cam_ray = init_ray(cam_ray_ori, cam_ray_dir);
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return (cam_ray);
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}
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