Function DrawIntoTopoMap

editor/WireframeGrWnd.cpp:845–872

Lets the user draw free hand into the topographical map

// Lets the user draw free hand into the topographical map
void DrawIntoTopoMap(int x, int y) {
  int i, t, segx, segz;

  if (KEY_STATE(KEY_LSHIFT)) {
    int seg = theApp.wireframe_view->GetCellFromPoint(x, y);
    if (seg < 0 || seg >= TERRAIN_WIDTH * TERRAIN_DEPTH)
      Int3(); // get Jason

    for (i = -1; i <= 1; i++) {
      for (t = -1; t <= 1; t++) {
        segx = seg % TERRAIN_WIDTH;
        segz = seg / TERRAIN_WIDTH;

        if ((segz + i) < 0 || segz + i >= TERRAIN_DEPTH)
          continue;
        if ((segx + t) < 0 || segx + t >= TERRAIN_WIDTH)
          continue;

        segz += i;
        segx += t;

        Terrain_tex_seg[Terrain_seg[(segz * TERRAIN_WIDTH) + segx].texseg_index].tex_index = D3EditState.texdlg_texture;
        theApp.wireframe_view->DrawTerrainCell((segz * TERRAIN_WIDTH) + segx);
      }
    }
    theApp.wireframe_view->Invalidate();
  }
}