Techneck/code/source-c/physics/primitives.h

#ifndef TC_PHYSICS_PRIMITIVES_H
#define TC_PHYSICS_PRIMITIVES_H

#include <stdbool.h>
#include <stdint.h>

#include <utility/math.h>

typedef struct  tc_physics_mesh                 tc_physics_mesh_s;

typedef struct  tc_aabb             tc_aabb_s;
typedef struct  tc_obb              tc_obb_s;
typedef struct  tc_plane            tc_plane_s;
typedef struct  tc_ellipsoid        tc_ellipsoid_s;
typedef struct  tc_ray              tc_ray_s;
typedef struct  tc_line             tc_line_s;

typedef enum
{
    TC_PRIMITIVE_AABB,
    TC_PRIMITIVE_OBB,
    TC_PRIMITIVE_PLANE,
    TC_PRIMITIVE_ELLIPSOID,
    TC_PRIMITIVE_RAY,
    TC_PRIMITIVE_LINE
    
} tc_primitive_type_e;

struct tc_aabb
{
    tc_vec3f_s                  start;
    tc_vec3f_s                  size;
};

struct tc_obb
{
    tc_vec3f_s                  start;
    tc_vec3f_s                  size;
    tc_vec3f_s                  rotation;
};

struct tc_plane
{
    tc_vec3f_s                  center;
    tc_vec3f_s                  rotation;
    tc_vec2i_s                  size;
};

struct tc_ellipsoid
{
    tc_vec3f_s                  center;
    tc_vec3f_s                  extent;
};

struct tc_ray
{
    tc_vec3f_s                  start;
    tc_vec3f_s                  rotation;
};

struct tc_line
{
    tc_vec3f_s                  start;
    tc_vec3f_s                  end;
};


typedef union tc_primitive
{
    tc_aabb_s       aabb;
    tc_obb_s        obb;
    tc_plane_s      plane;
    tc_ellipsoid_s  sphere;
    
    tc_line_s       line;
    tc_ray_s        ray;
    
} tc_primitive_u;

typedef struct tc_primitive_container
{
    tc_primitive_type_e         type;
    tc_primitive_u              data;
    
} tc_primitive_s;

struct tc_physics_mesh
{
    u32_t                       num_primitives;
    union
    {
        struct complex
        {
            u32_t                       primitives_capacity;
            tc_primitive_s             *primitives;
        } complex;
        struct simple
        {
            tc_primitive_s              primitive;
            
            
        } simple;
    } value;
};

tc_physics_mesh_s   tc_wrap_aabb        (tc_vec3f_s start, tc_vec3f_s size);

#endif // TC_PHYSICS_PRIMITIVES_H