Function DoWallEffects

physics/collide.cpp:979–1042

Creates some effects where a weapon has collided with a wall

// Creates some effects where a weapon has collided with a wall
void DoWallEffects(object *weapon, int surface_tmap) {
  texture *texp = &GameTextures[surface_tmap];

  if (texp->flags & (TF_VOLATILE + TF_LAVA + TF_WATER)) {
    // Create some lava steam
    if ((texp->flags & TF_WATER) || ((ps_rand() % 4) == 0)) {
      int visnum = VisEffectCreate(VIS_FIREBALL, MED_SMOKE_INDEX, weapon->roomnum, &weapon->pos);
      if (visnum >= 0) {
        vis_effect *vis = &VisEffects[visnum];

        vis->lifetime = .9f;
        vis->lifeleft = .9f;

        vis->movement_type = MT_PHYSICS;
        vis->size = 3.0;
        vm_MakeZero(&vis->velocity);
        vis->velocity.y = 10;
      }
    }
  } else if (texp->flags & TF_RUBBLE) {
    if ((ps_rand() % 4) == 0) {
      int num_rubble = (ps_rand() % 3) + 1;
      int bm_handle = GetTextureBitmap(texp - GameTextures, 0);
      uint16_t *data = bm_data(bm_handle, 0);

      uint16_t color = data[(bm_w(bm_handle, 0) * (bm_h(bm_handle, 0) / 2)) + (bm_w(bm_handle, 0) / 2)];

      for (int i = 0; i < num_rubble; i++) {
        int visnum;

        visnum = VisEffectCreate(VIS_FIREBALL, RUBBLE1_INDEX + (ps_rand() % 2), weapon->roomnum, &weapon->pos);

        if (visnum >= 0) {
          vis_effect *vis = &VisEffects[visnum];

          vis->movement_type = MT_PHYSICS;
          vis->mass = 100;
          vis->drag = .1f;

          vis->phys_flags |= PF_GRAVITY | PF_NO_COLLIDE;

          if ((ps_rand() % 3) == 0) {
            vis->velocity.x = (ps_rand() % 100) - 50;
            vis->velocity.y = -((ps_rand() % 200) - 30);
            vis->velocity.z = (ps_rand() % 100) - 50;
          } else {
            vis->velocity.x = (ps_rand() % 300) - 50;
            vis->velocity.y = -((ps_rand() % 200) - 30);
            vis->velocity.z = (ps_rand() % 300) - 50;
          }

          vm_NormalizeVectorFast(&vis->velocity);
          vis->velocity *= 4 + (ps_rand() % 20);
          vis->size = .5 + (((ps_rand() % 11) - 5) * .05);
          vis->flags |= VF_USES_LIFELEFT;
          float lifetime = 1.0 + (((ps_rand() % 11) - 5) * .1);
          vis->lifeleft = lifetime;
          vis->lifetime = lifetime;