Function bump_two_objects

physics/collide.cpp:1708–2036

}

void bump_two_objects(object *object0, object *object1, vector *collision_point, vector *collision_normal,
                      int damage_flag) {
  object *t = nullptr;
  object *other = nullptr;

  // Determine if a moving object hits a non-moving object
  if ((object0->movement_type != MT_PHYSICS && object0->movement_type != MT_WALKING) ||
      (object0->movement_type == MT_PHYSICS && object0->mtype.phys_info.velocity == Zero_vector &&
       (object0->mtype.phys_info.flags & PF_LOCK_MASK) && (object0->mtype.phys_info.flags & PF_POINT_COLLIDE_WALLS))) {
    t = object1;
    other = object0;
    *collision_normal *= -1.0f;
  }
  if ((object1->movement_type != MT_PHYSICS && object1->movement_type != MT_WALKING) ||
      (object1->movement_type == MT_PHYSICS && object1->mtype.phys_info.velocity == Zero_vector &&
       (object1->mtype.phys_info.flags & PF_LOCK_MASK) && (object1->mtype.phys_info.flags & PF_POINT_COLLIDE_WALLS))) {
    t = object0;
    other = object1;
  }

  // If we hit a non-moving object...
  if (t) {
    // chrishack -- walker hack
    if (t->movement_type != MT_PHYSICS && t->movement_type != MT_WALKING) {
      t->mtype.phys_info.velocity = Zero_vector;
      return;
    }

    if (t->mtype.phys_info.flags & PF_PERSISTENT)
      return;

    vector moved_v;
    float wall_part;

    float luke_test;

    if (t->type == OBJ_PLAYER) {
      luke_test = vm_GetMagnitude(&t->mtype.phys_info.velocity);
    }

    if (!(t->flags & OF_DEAD)) {
      // Find hit speed
      moved_v = t->pos - t->last_pos;
      wall_part = *collision_normal * t->mtype.phys_info.velocity;

      if (t->mtype.phys_info.flags & PF_BOUNCE) {
        wall_part *= 2.0; // Subtract out wall part twice to achieve bounce

        // New bounceness code
        if ((t->mtype.phys_info.flags & PF_BOUNCE) && (t->mtype.phys_info.num_bounces != PHYSICS_UNLIMITED_BOUNCE)) {
          if (t->mtype.phys_info.num_bounces == 0) {
            ASSERT(t->type != OBJ_PLAYER);
            if (t->flags & OF_DYING) {
              ASSERT((t->control_type == CT_DYING) || (t->control_type == CT_DYING_AND_AI));
              DestroyObject(t, 50.0, t->ctype.dying_info.death_flags);
            } else
              SetObjectDeadFlag(t);
          }