Function StartLightInstance

model/polymodel.cpp:2745–2797

static int Instance_light_cnt = 0;

void StartLightInstance(vector *pos, matrix *orient) {
  int gouraud = 0, specular = 0, fogged = 0, bumped = 0;

  if (Polymodel_light_type == POLYMODEL_LIGHTING_GOURAUD)
    gouraud = 1;
  if (Polymodel_use_effect && Polymodel_effect.type & PEF_FOGGED_MODEL)
    fogged = 1;
  if (Polymodel_use_effect && Polymodel_effect.type & (PEF_SPECULAR_MODEL | PEF_SPECULAR_FACES))
    specular = 1;
  if (Polymodel_use_effect && (Polymodel_effect.type & PEF_BUMPMAPPED))
    bumped = 1;

  if (gouraud)
    Instance_light_stack[Instance_light_cnt] = *Polymodel_light_direction;
  if (fogged) {
    Instance_fog_plane_stack[Instance_light_cnt] = Polymodel_fog_plane;
    Instance_fog_portal_vert_stack[Instance_light_cnt] = Polymodel_fog_portal_vert;
  }

  if (specular)
    Instance_specular_pos[Instance_light_cnt] = Polymodel_specular_pos;

  if (bumped)
    Instance_bump_pos[Instance_light_cnt] = Polymodel_bump_pos;

  Instance_light_cnt++;

  vector temp_vec;

  if (gouraud) {
    vm_MatrixMulVector(&temp_vec, Polymodel_light_direction, orient);
    *Polymodel_light_direction = temp_vec;
  }
  if (fogged) {
    vector tempv = Polymodel_fog_portal_vert - *pos;
    vm_MatrixMulVector(&temp_vec, &tempv, orient);
    Polymodel_fog_portal_vert = temp_vec;

    vm_MatrixMulVector(&temp_vec, &Polymodel_fog_plane, orient);
    Polymodel_fog_plane = temp_vec;
  }
  if (specular) {
    vector tempv = Polymodel_specular_pos - *pos;
    vm_MatrixMulVector(&temp_vec, &tempv, orient);
    Polymodel_specular_pos = temp_vec;
  }

  if (bumped) {
    vector tempv = Polymodel_bump_pos - *pos;
    vm_MatrixMulVector(&temp_vec, &tempv, orient);
    Polymodel_bump_pos = temp_vec;
  }
}
void DoneLightInstance() {
  ASSERT(Instance_light_cnt != 0);
  Instance_light_cnt--;