Function DoTerrainDynamicTable

editor/editor_lighting.cpp:1730–1791

Puts a 3d grid of points on the terrain and sets a bit indicating if a light source can reach that point. This is used for the dynamic lighting of objects on the terrain

// Puts a 3d grid of points on the terrain and sets a bit indicating if a light source
// can reach that point.  This is used for the dynamic lighting of objects on the terrain
void DoTerrainDynamicTable() {
  int i, t, k, j, maxrays;
  int raynum = 0;
  int key;

  maxrays = AREA_X * AREA_Z * 8 * Terrain_sky.num_satellites;

  mprintf(0, "Calculating dynamic light table for %d points...\n", maxrays);
  mprintf(0, "Press tilde key to abort!\n");

  memset(Terrain_dynamic_table, 0, (TERRAIN_DEPTH * TERRAIN_WIDTH));

  for (i = 0; i < AREA_Z; i++) {
    //	ddio_KeyFrame();
    while ((key = ddio_KeyInKey()) != 0) {
      if (key == KEY_LAPOSTRO) {
        for (; i < AREA_Z; i++) {
          for (t = 0; t < AREA_X; t++) {
            int tseg = i * TERRAIN_WIDTH + t;
            Terrain_dynamic_table[tseg] = 255;
          }
        }

        return;
      }
    }

    for (t = 0; t < AREA_X; t++) {
      int tseg = i * TERRAIN_WIDTH + t;
      vector gp;

      gp.x = (t * TERRAIN_SIZE);
      gp.z = (i * TERRAIN_SIZE);

      gp.y = Terrain_seg[tseg].y;

      for (k = 0; k < 8; k++) {
        vector pos;

        pos.x = gp.x;
        pos.z = gp.z;
        pos.y = k * (MAX_TERRAIN_HEIGHT / 8);

        for (j = 0; j < Terrain_sky.num_satellites; j++) {
          raynum++;
          mprintf_at(2, 4, 0, "Ray=%d      ", raynum);

          if (gp.y > pos.y)
            continue;

          int answer;
          answer = ShootRayForTerrainLight(&pos, &Terrain_sky.satellite_vectors[j], tseg);
          if (!answer)
            continue;

          Terrain_dynamic_table[tseg] |= (1 << k);
          j = Terrain_sky.num_satellites;
        }