Function TCAMRenderTerrain

Descent3/TelComAutoMap.cpp:614–663

Renders the low-res terrain for the automap

// Renders the low-res terrain for the automap
void TCAMRenderTerrain() {
  int nt;
  int render_width, render_height;
  float w2, h2;

  int save_check = Terrain_occlusion_checksum;
  int save_pix = Detail_settings.Pixel_error;
  float save_dist = Detail_settings.Terrain_render_distance;

  Detail_settings.Pixel_error = 31;
  Detail_settings.Terrain_render_distance = 300 * TERRAIN_SIZE;
  Terrain_occlusion_checksum = -1;

  // Get the size of the current render window
  rend_GetProjectionParameters(&render_width, &render_height);
  w2 = ((float)render_width - 1) / 2.0;
  h2 = ((float)render_height - 1) / 2.0;

  // Set up vars for (psuedo-)clipping window
  Check_terrain_portal = 0;

  Clip_scale_left = 0;
  Clip_scale_right = render_width - 1;
  Clip_scale_top = 0;
  Clip_scale_bot = render_height - 1;

  Terrain_from_mine = 0;

  VisibleTerrainZ = (Detail_settings.Terrain_render_distance) * Matrix_scale.z;

  // Set up our z wall
  g3_SetFarClipZ(VisibleTerrainZ);

  vector viewer_eye;
  matrix viewer_orient;
  // Get scaled matrix
  g3_GetViewPosition(&viewer_eye);
  g3_GetViewMatrix(&viewer_orient);

  // Get all of the cells visible to us
  nt = GetVisibleTerrain(&viewer_eye, &viewer_orient);

  // And display!
  if (nt > 0)
    DisplayTerrainList(nt, 1);

  Detail_settings.Pixel_error = save_pix;
  Detail_settings.Terrain_render_distance = save_dist;
  Terrain_occlusion_checksum = save_check;
}

#define AM_BLINK_TIME .25f