Function DrawTexturedSky

Descent3/terrainrender.cpp:1678–1848

Draws the sky textures

}
// Draws the sky textures
void DrawTexturedSky(void) {
  int t, k, tw;
  float sr, sg, sb, hr, hg, hb;

  // Change terrain sky if needed
  int dome_bm = GetTextureBitmap(Terrain_sky.dome_texture, 0);

  g3Point pnt[6], *pntlist[6];
  g3UVL uvls[10];

  rend_SetWrapType(WT_WRAP);
  rend_SetTextureType(TT_PERSPECTIVE);
  rend_SetColorModel(CM_MONO);
  rend_SetAlphaType(ATF_TEXTURE);
  g3_SetTriangulationTest(1);

  // Draw top part
  for (t = 0; t < MAX_HORIZON_PIECES; t++) {
    tw = (t + 1) % MAX_HORIZON_PIECES;
    pnt[0].p3_vec = Temp_sky_vectors[t][0];
    pnt[0].p3_vecPreRot = Temp_sky_vectors_unrotated[t][0];
    uvls[0].u = Terrain_sky.horizon_u[t][0];
    uvls[0].v = Terrain_sky.horizon_v[t][0];

    pnt[1].p3_vec = Temp_sky_vectors[tw][1];
    pnt[1].p3_vecPreRot = Temp_sky_vectors_unrotated[tw][1];
    uvls[1].u = Terrain_sky.horizon_u[tw][1];
    uvls[1].v = Terrain_sky.horizon_v[tw][1];

    pnt[2].p3_vec = Temp_sky_vectors[t][1];
    pnt[2].p3_vecPreRot = Temp_sky_vectors_unrotated[t][1];
    uvls[2].u = Terrain_sky.horizon_u[t][1];
    uvls[2].v = Terrain_sky.horizon_v[t][1];

    for (k = 0; k < 3; k++) {
      g3Point *p = &pnt[k];
      p->p3_flags = PF_UV | PF_L | PF_ORIGPOINT;
      g3_CodePoint(p);
      p->p3_uvl = uvls[k];
      p->p3_l = 1;
    }

#if (defined(EDITOR) || defined(NEWEDITOR))
    ddgr_color oldcolor;
    if (TSearch_on) {
      rend_SetPixel(GR_RGB(0, 255, 0), TSearch_x, TSearch_y);
      oldcolor = rend_GetPixel(TSearch_x, TSearch_y); // will be different in 15/16-bit color
    }
#endif

    pntlist[0] = &pnt[0];
    pntlist[1] = &pnt[1];
    pntlist[2] = &pnt[2];
    g3_DrawPoly(3, pntlist, dome_bm);

#if (defined(EDITOR) || defined(NEWEDITOR))
    if (TSearch_on) {
      ddgr_color newcolor = rend_GetPixel(TSearch_x, TSearch_y);