Function CreateRandomLineSparks

Descent3/viseffect.cpp:813–849

Creates a some sparks that go in random directions

// Creates a some sparks that go in random directions
void CreateRandomLineSparks(int num_sparks, vector *pos, int roomnum, uint16_t color, float force_scalar) {
  // Make more sparks if Katmai
  if (Katmai)
    num_sparks *= 2;

  // Create some sparks
  for (int i = 0; i < num_sparks; i++) {
    int visnum = VisEffectCreate(VIS_FIREBALL, FADING_LINE_INDEX, roomnum, pos);
    if (visnum >= 0) {
      vis_effect *vis = &VisEffects[visnum];

      vis->movement_type = MT_PHYSICS;
      vis->mass = 500;
      vis->drag = .001f;
      vis->phys_flags |= PF_GRAVITY | PF_NO_COLLIDE;

      vis->velocity.x = (ps_rand() % 100) - 50;
      vis->velocity.y = (ps_rand() % 100);
      vis->velocity.z = (ps_rand() % 100) - 50;

      vm_NormalizeVectorFast(&vis->velocity);

      vis->velocity *= 20 + (ps_rand() % 10);
      vis->velocity *= force_scalar;
      vis->size = .7 + ((ps_rand() % 10) * .04);
      vis->flags |= VF_USES_LIFELEFT;
      float lifetime = 1 + ((ps_rand() % 10) * .15);
      vis->lifeleft = lifetime;
      vis->lifetime = lifetime;

      if (color == 0)
        vis->lighting_color = GR_RGB16(200 + (ps_rand() % 50), 150 + (ps_rand() % 50), ps_rand() % 50);
      else
        vis->lighting_color = color;
    }
  }
}

// Creates a some sparks that go in random directions
void CreateRandomSparks(int num_sparks, vector *pos, int roomnum, int which_index, float force_scalar) {