berusky2/src/komat/obbo.h

/* OBB a jeho stromy
*/

#ifndef __OBB_OLD_H__
#define __OBB_OLD_H__

void obb_body(OBB_OLD * p_obbs);
int obb_intersect_obb(OBB_OLD * p_obb1, OBB_OLD * p_obb2);
int obb_intersect_line(OBB_OLD * p_obb, BOD * p_orig, BOD * p_dir);
int obb_intersect_line_dist(OBB_OLD * p_obb, BOD * p_orig, BOD * p_dir);
void obb_obalka(GLMATRIX * p_mat, OBB_OLD * p_obb, BOD * p_min, BOD * p_max);
void obb_slep(OBB_OLD * p_vys, OBB_OLD * p_list, int num);
void obb_slep_aabb(OBB_OLD * p_vys, OBB_OLD * p_list, int num);

float obb_calc_obalka_obj(EDIT_OBJEKT * p_obj, BOD * p_vx, BOD * p_vy,
  BOD * p_vz, BOD * p_dist, BOD * p_stred);
void obb_calc_obj(EDIT_OBJEKT * p_obj);
void obb_calc_obj_fast(EDIT_OBJEKT * p_obj);
void obb_calc_kont(EDIT_KONTEJNER * p_kont_top, int precizne);
float obb_calc_poly_obalka(EDIT_MESH_POLY * p_poly, BOD * p_vx, BOD * p_vy,
  BOD * p_vz, BOD * p_dist, BOD * p_stred);
void obb_calc_poly(EDIT_MESH_POLY * p_poly);
void obb_calc_item(OBB_OLD * p_vys, OBB_TREE_ITEM_OLD * p_item, int itemnum);

void obbtree_vyrob(OBB_TREE_OLD * p_prvni, EDIT_MESH_POLY * p_poly,
  int polynum, GAME_MESH_OLD ** p_mesh, int meshnum, int *p_ind,
  EDIT_MATERIAL ** p_matlist);
void obbtree_vyrob_rec(OBB_TREE_OLD * p_prvni, float max_vzdal);
void obbtree_zrus(OBB_TREE_OLD * p_ob);
void obbtree_kresli(OBB_TREE_OLD * p_prvni, dword barva);

int obb_visibility(OBB_OLD * p_obb, GLMATRIX * p_m);
inline float obb_vzdal_bod(OBB_OLD * p_obb, BOD * p_bod);

void obb_kresli_obalku(OBB_OLD * p_obb, dword barva, GLMATRIX * p_mat);

void obb_prvek(OBB_OLD * p_obb);

inline float obb_vzdal_rovina_x(OBB_OLD * p_obb, float x)
{
  float min = p_obb->aabb_min.x, max = p_obb->aabb_max.x;
  float vzdal1, vzdal2;

  if (min <= x && x <= max)
    return (0.0f);
  else {
    vzdal1 = fabsf(min - x);
    vzdal2 = fabsf(max - x);
    return (vzdal1 > vzdal2 ? vzdal1 : vzdal2);
  }
}

inline float obb_vzdal_rovina_y(OBB_OLD * p_obb, float y)
{
  float min = p_obb->aabb_min.y, max = p_obb->aabb_max.y;
  float vzdal1, vzdal2;

  if (min <= y && y <= max)
    return (0.0f);
  else {
    vzdal1 = fabsf(min - y);
    vzdal2 = fabsf(max - y);
    return (vzdal1 > vzdal2 ? vzdal1 : vzdal2);
  }
}

inline float obb_vzdal_rovina_z(OBB_OLD * p_obb, float z)
{
  float min = p_obb->aabb_min.z, max = p_obb->aabb_max.z;
  float vzdal1, vzdal2;

  if (min <= z && z <= max)
    return (0.0f);
  else {
    vzdal1 = fabsf(min - z);
    vzdal2 = fabsf(max - z);
    return (vzdal1 > vzdal2 ? vzdal1 : vzdal2);
  }
}

inline float obb_vzdal_bod(OBB_OLD * p_obb, BOD * p_bod)
{
  BOD v, v1, v2;
  float len;

  vektor_sub(p_bod, &p_obb->obb_stred, &v1);

  v.x = vektor_dot_product(p_obb->obb, &v1);
  v.y = vektor_dot_product(p_obb->obb + 1, &v1);
  v.z = vektor_dot_product(p_obb->obb + 2, &v1);

  v2 = v1;
  len = vektor_norm_mult_vektor(&v2, &p_obb->obb_len);

  if (fabsf(v1.x) <= fabsf(v2.x) &&
    fabsf(v1.y) <= fabsf(v2.y) && fabsf(v1.z) <= fabsf(v2.z)) {
    return (0.0f);
  }
  else {
    return (vektor_velikost(vektor_sub(&v1, &v2, &v1)));
  }
}

inline float obb_vzdal_bod_aabb(OBB_OLD * p_obb, BOD * p_bod)
{
  BOD v1, v2;
  float len;

  vektor_sub(p_bod, &p_obb->obb_stred, &v1);
  v2 = v1;
  len = vektor_norm_mult_vektor(&v2, &p_obb->obb_len);

  if (fabsf(v1.x) <= fabsf(v2.x) &&
    fabsf(v1.y) <= fabsf(v2.y) && fabsf(v1.z) <= fabsf(v2.z)) {
    return (0.0f);
  }
  else {
    return (vektor_velikost(vektor_sub(&v1, &v2, &v1)));
  }
}

inline int obb_je_bod_v_kostce(OBB_OLD * p_obb, BOD * p_bod)
{
  BOD v, v1;
  BOD *p_len;

  vektor_sub(p_bod, &p_obb->obb_stred, &v1);

  v.x = vektor_dot_product(p_obb->obb, &v1);
  v.y = vektor_dot_product(p_obb->obb + 1, &v1);
  v.z = vektor_dot_product(p_obb->obb + 2, &v1);
  p_len = &p_obb->obb_len;

  if (fabsf(v.x) <= fabsf(p_len->x) &&
    fabsf(v.y) <= fabsf(p_len->y) && fabsf(v.z) <= fabsf(p_len->z))
    return (TRUE);
  else
    return (FALSE);
}

inline int obb_je_bod_v_kostce_aabb(OBB_OLD * p_obb, BOD * p_bod)
{
  BOD *p_min = &p_obb->aabb_min;
  BOD *p_max = &p_obb->aabb_max;

  return (p_min->x <= p_bod->x && p_bod->x <= p_max->x &&
    p_min->y <= p_bod->y && p_bod->y <= p_max->y &&
    p_min->z <= p_bod->z && p_bod->z <= p_max->z);
}

inline void obb_aabb_obj(EDIT_OBJEKT * p_obj, OBB_OLD * p_obb)
{
  objekt_obalka(p_obj, NULL, &p_obb->aabb_min, &p_obb->aabb_max);
}

inline void obb_aabb_poly(EDIT_MESH_POLY * p_poly, OBB_OLD * p_obb)
{
  poly_obalka(p_poly, NULL, &p_obb->aabb_min, &p_obb->aabb_max);
}

inline void obb_aabb_kont(EDIT_KONTEJNER * p_kont, OBB_OLD * p_obb)
{
  kontejner_obalka_aabb(p_kont, &p_obb->aabb_min, &p_obb->aabb_max);
}

inline void obb_aabb(OBB_OLD * p_obb)
{
  obb_obalka(NULL, p_obb, &p_obb->aabb_min, &p_obb->aabb_max);
}

inline void obb_transformuj(OBB_OLD * p_src, GLMATRIX * p_mat,
  OBB_OLD * p_dest)
{
  GLMATRIX m;
  BOD a1;
  float lx, ly, lz;

  transformuj_bod_matici_bod(&p_src->obb_stred, p_mat, &p_dest->obb_stred);
  lx = p_src->obb_len.x;
  ly = p_src->obb_len.y;
  lz = p_src->obb_len.z;

  m = *p_mat;
  m._41 = m._42 = m._43 = 0.0f;

  if (lx != 0.0f) {
    vektor_mult_skalar(p_src->obb, lx, &a1);
    p_dest->obb_len.x =
      vektor_norm(transformuj_bod_matici_bod(&a1, &m, p_dest->obb));
  }
  else {
    transformuj_bod_matici_bod(p_src->obb, &m, p_dest->obb);
    p_dest->obb_len.x = 0.0f;
  }

  if (ly != 0.0f) {
    vektor_mult_skalar(p_src->obb + 1, ly, &a1);
    p_dest->obb_len.y =
      vektor_norm(transformuj_bod_matici_bod(&a1, &m, p_dest->obb + 1));
  }
  else {
    transformuj_bod_matici_bod(p_src->obb + 1, &m, p_dest->obb + 1);
    p_dest->obb_len.y = 0.0f;
  }

  if (lz != 0.0f) {
    vektor_mult_skalar(p_src->obb + 2, lz, &a1);
    p_dest->obb_len.z =
      vektor_norm(transformuj_bod_matici_bod(&a1, &m, p_dest->obb + 2));
  }
  else {
    transformuj_bod_matici_bod(p_src->obb + 2, &m, p_dest->obb + 2);
    p_dest->obb_len.z = 0.0f;
  }

  obb_body(p_dest);
  obb_aabb(p_dest);
}

inline void obb_transformuj_aabb(OBB_OLD * p_src, GLMATRIX * p_mat,
  OBB_OLD * p_dest)
{
  BOD *p_s1 = p_src->obb_hran, *p_s2 = p_dest->obb_hran;
  int i;

  for (i = 0; i < 8; i++)
    transformuj_bod_matici_bod(p_s1 + i, p_mat, p_s2 + i);
  obb_aabb(p_dest);
}

inline void obb_kresli_obalku_obj(EDIT_OBJEKT * p_obj, GLMATRIX * p_mat,
  dword barva)
{
  obb_kresli_obalku(&p_obj->obb, barva, p_mat);
}

inline void obb_kresli_obalku_kont(EDIT_KONTEJNER * p_kont, GLMATRIX * p_mat,
  dword barva)
{
  obb_kresli_obalku(&p_kont->obb, barva, p_mat);
}

#endif