Function DrawCloudLayer

Descent3/terrainrender.cpp:1276–1304

Draws a flat fog layer

#define CLOUD_LAYER_HEIGHT (TERRAIN_HEIGHT_INCREMENT * 320.0f)
// Draws a flat fog layer
void DrawCloudLayer() {
  vector worldvec[4];
  g3Point pnt[4], *pntlist[6];
  rend_SetFlatColor(GR_RGB(192, 192, 255));
  rend_SetAlphaValue(32);
  rend_SetAlphaType(AT_CONSTANT);
  rend_SetTextureType(TT_FLAT);
  rend_SetLighting(LS_NONE);
  worldvec[0].x = -(TERRAIN_SIZE * 100);
  worldvec[0].y = CLOUD_LAYER_HEIGHT;
  worldvec[0].z = (TERRAIN_SIZE * (100 + TERRAIN_DEPTH));

  worldvec[1].x = -(TERRAIN_SIZE * 100);
  worldvec[1].y = CLOUD_LAYER_HEIGHT;
  worldvec[1].z = -(TERRAIN_SIZE * (100));

  worldvec[2].x = (TERRAIN_SIZE * (100 + TERRAIN_WIDTH));
  worldvec[2].y = CLOUD_LAYER_HEIGHT;
  worldvec[2].z = -(TERRAIN_SIZE * (100));

  worldvec[3].x = (TERRAIN_SIZE * (100 + TERRAIN_WIDTH));
  worldvec[3].y = CLOUD_LAYER_HEIGHT;
  worldvec[3].z = (TERRAIN_SIZE * (100 + TERRAIN_DEPTH));
  for (int i = 0; i < 4; i++) {
    g3_RotatePoint(&pnt[i], &worldvec[i]);
    pntlist[i] = &pnt[i];
  }
  g3_DrawPoly(4, pntlist, 0);
}
// left,top,right,bot are optional parameters.  Omiting them (or setting them to -1) will
// render to the whole screen.  Passing valid values will only render tiles visible in the
// specified window (though it won't clip those tiles to the window)