Function VisEffectMoveOne

Descent3/viseffect.cpp:2025–2178

Moves

// Moves
void VisEffectMoveOne(vis_effect *vis) {
  if (vis->flags & VF_USES_LIFELEFT)
    vis->lifeleft -= Frametime; //...inevitable countdown towards death

  // Chris, do your stuff here
  if (vis->movement_type == MT_PHYSICS)
    do_vis_physics_sim(vis);

  if (vis->flags & VF_USES_LIFELEFT) {
    if (vis->lifeleft < 0)
      VisEffectSetDeadFlag(vis);
  }

  if (vis->id == SNOWFLAKE_INDEX) {
    Weather.snowflakes_to_create++;

    vis->pos += vis->velocity * Frametime;

    if (vis->pos.y < 1)
      VisEffectSetDeadFlag(vis);
  }

  // Do attached viseffect stuff here
  if (vis->flags & VF_ATTACHED) {
    int objnum = vis->attach_info.obj_handle & HANDLE_OBJNUM_MASK;
    uint32_t sig = vis->attach_info.obj_handle & HANDLE_COUNT_MASK;
    object *obj = &Objects[objnum];

    if ((obj->flags & OF_DEAD) || (obj->handle & HANDLE_COUNT_MASK) != sig) {
      // The object we're attached to doesn't exist anymore
      VisEffectSetDeadFlag(vis);

    } else if (obj->type == OBJ_PLAYER && (Players[obj->id].flags & (PLAYER_FLAGS_DYING | PLAYER_FLAGS_DEAD))) {
      // The object we're attached to doesn't exist anymore
      VisEffectSetDeadFlag(vis);
    } else {
      if (vis->id == THICK_LIGHTNING_INDEX) {
        if (vis->flags & VF_PLANAR) {
          // Do object to object attachment
          int dest_objnum = vis->attach_info.dest_objhandle & HANDLE_OBJNUM_MASK;
          uint32_t dest_sig = vis->attach_info.dest_objhandle & HANDLE_COUNT_MASK;
          object *dest_obj = &Objects[dest_objnum];

          if ((dest_obj->flags & OF_DEAD) || (dest_obj->handle & HANDLE_COUNT_MASK) != dest_sig) {
            // The object we're attached to doesn't exist anymore
            VisEffectSetDeadFlag(vis);
            return;
          }

          if (dest_obj->type == OBJ_PLAYER &&
              (Players[dest_obj->id].flags & (PLAYER_FLAGS_DYING | PLAYER_FLAGS_DEAD))) {
            VisEffectSetDeadFlag(vis);
            return;
          }

          vis->pos = obj->pos;
          vis->end_pos = dest_obj->pos;