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cone_collision.c
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/*
** cone_collision.c for cone_collision in /home/nicolas/Modules/104intersection
**
** Made by menett_a
** Login <[email protected]>
**
** Started on Sat Mar 12 16:10:10 2016 menett_a
** Last update Sun Mar 13 20:46:15 2016 menett_a
*/
#include <lapin.h>
#include <math.h>
#include "struct.h"
#include "proto.h"
void cone_norm(t_loop *data, int i)
{
double vx;
double vz;
double m;
vx = data->collision.pos_x - data->info.cone[i].pos_x;
vz = data->collision.pos_z - data->info.cone[i].pos_z;
m = sqrt(vx * vx + vz * vz);
vx = vx / m;
vz = vz / m;
data->norm.n_x = vx * 500 / data->info.cone[i].angle;
data->norm.n_y = data->info.cone[i].angle / 500;
data->norm.n_z = vz * 500 / data->info.cone[i].angle;
}
void save_cone(t_loop *data, int i, double x)
{
double dist;
calcul_pos(data, x, &dist);
if (dist < data->collision.dist || data->collision.dist == 0)
{
data->collision.dist = dist;
cone_norm(data, i);
data->collision.color = data->info.cone[i].color;
data->collision.is_collision = 1;
}
}
void find_cone(t_loop *data, int i)
{
if (data->collision.x < data->collision._x
&& data->collision.x > 0.01)
save_cone(data, i, data->collision.x);
else if (data->collision._x < data->collision.x
&& data->collision._x > 0.01)
save_cone(data, i, data->collision._x);
}
void calcul_cone(t_loop *data, t_info *cone, int i)
{
data->delta.a =
pow(data->ray.vec_x, 2) + pow(data->ray.vec_z, 2)
- pow(data->ray.vec_y, 2)
* pow(tan(M_PI * cone->cone[i].angle / 180), 2);
data->delta.b =
(2 * (data->pos_x - cone->cone[i].pos_x) * data->ray.vec_x)
+ (2 * (data->pos_z - cone->cone[i].pos_z) * data->ray.vec_z)
- (2 * (data->pos_y - cone->cone[i].pos_y) * data->ray.vec_y)
* pow(tan(M_PI * cone->cone[i].angle / 180), 2);
data->delta.c =
pow(data->pos_x - cone->cone[i].pos_x, 2)
+ pow(data->pos_z - cone->cone[i].pos_z, 2)
- pow(data->pos_y - cone->cone[i].pos_y, 2)
* pow(tan(M_PI * cone->cone[i].angle / 180) , 2);
data->delta.delta = pow(data->delta.b, 2) -
4 * data->delta.a * data->delta.c;
if (find_delta(data) == 2)
find_cone(data, i);
}
void cone_collision(t_loop *data, t_info *cone)
{
int i;
i = 0;
while (i < cone->nb_cone)
{
calcul_cone(data, cone, i);
if (data->collision.is_collision == 1)
find_light(data);
i = i + 1;
}
}