Function DrawPolygonalWeaponRing

Descent3/WeaponFire.cpp:2509–2577

}

void DrawPolygonalWeaponRing(object *obj) {
  vector inner_vecs[30], outer_vecs[30];
  g3Point inner_points[30], outer_points[30];
  float lifenorm = (obj->lifetime - obj->lifeleft) / obj->lifetime;
  int i;
  g3Point *pntlist[4];
  float inner_size = (obj->size * .8);
  int objnum = obj - Objects;
  int odd = objnum % 2;

  int num_segments = 20;

  int ring_increment = 65536 / num_segments;
  int ring_angle = 0;

  if (lifenorm > 1.0)
    lifenorm = 1.0;

  rend_SetTextureType(TT_FLAT);
  rend_SetColorModel(CM_RGB);
  rend_SetLighting(LS_GOURAUD);
  rend_SetAlphaType(AT_SATURATE_VERTEX);

  for (i = 0; i < num_segments; i++, ring_angle += ring_increment) {
    float ring_sin = FixSin(ring_angle);
    float ring_cos = FixCos(ring_angle);

    inner_vecs[i] = obj->orient.rvec * (ring_cos * inner_size);
    inner_vecs[i] += obj->orient.uvec * (ring_sin * inner_size);
    inner_vecs[i] += obj->pos;

    outer_vecs[i] = obj->orient.rvec * (ring_cos * obj->size);
    outer_vecs[i] += obj->orient.uvec * (ring_sin * obj->size);
    outer_vecs[i] += obj->pos;

    g3_RotatePoint(&inner_points[i], &inner_vecs[i]);
    g3_RotatePoint(&outer_points[i], &outer_vecs[i]);

    outer_points[i].p3_flags |= PF_RGBA | PF_UV;
    inner_points[i].p3_flags |= PF_RGBA | PF_UV;

    outer_points[i].p3_a = (1.0 - lifenorm) * .3;
    inner_points[i].p3_a = (1.0 - lifenorm) * .1;

    outer_points[i].p3_r = Weapons[obj->id].lighting_info.red_light1;
    outer_points[i].p3_g = Weapons[obj->id].lighting_info.green_light1;
    outer_points[i].p3_b = Weapons[obj->id].lighting_info.blue_light1;

    inner_points[i].p3_r = Weapons[obj->id].lighting_info.red_light1;
    inner_points[i].p3_g = Weapons[obj->id].lighting_info.green_light1;
    inner_points[i].p3_b = Weapons[obj->id].lighting_info.blue_light1;
  }

  for (i = 0; i < num_segments; i++) {
    if (i % 2 && !odd)
      continue;
    if ((i % 2 == 0) && odd)
      continue;