Function DestroyLight

Descent3/lighting.cpp:1995–2221

Kills the lighting that a face casts and dampens all the faces that light influences

// Kills the lighting that a face casts and dampens all the faces that light influences
void DestroyLight(int roomnum, int facenum) {
  vector vecs[MAX_VERTS_PER_FACE], center;
  room *destroy_rp = &Rooms[roomnum];
  face *destroy_fp = &destroy_rp->faces[facenum];
  float r, g, b;
  fvi_face_room_list facelist[MAX_DYNAMIC_FACES];
  int num_faces, i;
  uint16_t lmilist[MAX_DYNAMIC_FACES];
  int num_spoken_for = 0;

  if (Dedicated_server)
    return;

  float mul = ((float)destroy_fp->light_multiple) / 4.0;

  r = GameTextures[destroy_fp->tmap].r * mul;
  g = GameTextures[destroy_fp->tmap].g * mul;
  b = GameTextures[destroy_fp->tmap].b * mul;

  // Get highest component
  float rmax = std::max({r, g, b});

  // Get the normalized color that this face emits
  float red_scale = r / rmax;
  float green_scale = g / rmax;
  float blue_scale = b / rmax;

  // red_scale/=30;
  // green_scale/=30;
  // blue_scale/=30;

  mprintf(0, "r=%f g=%f b=%f\n", red_scale, green_scale, blue_scale);

  // Get center and area of light face
  for (i = 0; i < destroy_fp->num_verts; i++)
    vecs[i] = destroy_rp->verts[destroy_fp->face_verts[i]];

  float area = vm_GetCentroid(&center, vecs, destroy_fp->num_verts);

  // Get the sphere of influence of this light
  float power = rmax * area;
  float temp_ignore = DESTROYABLE_IGNORE_LIMIT / power;
  float express = 1.0 / temp_ignore;
  express /= 3.14f;
  express -= area;
  float sphere_dist = sqrt(express);

  //	ApplyLightingToObjects (pos,roomnum,light_dist,red_scale,green_scale,blue_scale,light_direction,dot_range);

  num_faces = fvi_QuickDistFaceList(roomnum, &center, sphere_dist, facelist, MAX_DYNAMIC_FACES);

  for (i = 0; i < num_faces; i++) {
    room *rp = &Rooms[facelist[i].room_index];
    face *fp = &rp->faces[facelist[i].face_index];

    ASSERT(Rooms[facelist[i].room_index].used);
    ASSERT(facelist[i].face_index < Rooms[facelist[i].room_index].num_faces);