n_3d.h

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/*
 * Nilorea Library
 * Copyright (C) 2005-2026 Castagnier Mickael
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef _N_3D_HEADER
#define _N_3D_HEADER
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "n_log.h"
#include "n_common.h"
#include <sys/time.h>
 
#define MOVE_STOPPED 0
#define MOVE_INTER 1
#define MOVE_SIMU 2
 
#define VECTOR3D_DONT_INTERSECT -2
#define VECTOR3D_COLLINEAR -1
#define VECTOR3D_DO_INTERSECT 0
 
typedef double VECTOR3D[3]; /* x , y , z  */
 
#define VECTOR3D_SET(VECTOR, X, Y, Z) \
    do {                              \
        VECTOR[0] = (X);              \
        VECTOR[1] = (Y);              \
        VECTOR[2] = (Z);              \
    } while (0)
 
typedef struct PHYSICS {
    time_t delta_t;
    VECTOR3D position;
    VECTOR3D speed;
    VECTOR3D acceleration;
    VECTOR3D orientation;
    VECTOR3D angular_speed;
    VECTOR3D angular_acceleration;
    VECTOR3D gravity;
    int can_jump;
    int sz;
    int type;
} PHYSICS;
 
double distance(VECTOR3D* p1, VECTOR3D* p2);
int update_physics_position_nb(PHYSICS* object, int it, double delta_t);
int update_physics_position_reverse_nb(PHYSICS* object, int it, double delta_t);
int update_physics_position(PHYSICS* object, double delta_t);
int update_physics_position_reverse(PHYSICS* object, double delta_t);
int vector_intersect(VECTOR3D* p0, VECTOR3D* p1, VECTOR3D* p2, VECTOR3D* p3, VECTOR3D* px);
double vector_dot_product(VECTOR3D* vec1, VECTOR3D* vec2);
double vector_normalize(VECTOR3D* vec);
double vector_angle_between(VECTOR3D* vec1, VECTOR3D* vec2);
 
#define copy_point(__src_, __dst_) \
    memcpy(__dst_, __src_, sizeof(VECTOR3D));
 
#ifdef __cplusplus
}
#endif
 
#endif  // header guard