Viewer is ready to go, I think

luprex/syscpp/viewer.cpp

@@ -0,0 +1,88 @@
+
+#include "viewer.hpp"
+
+Viewer::Viewer() {
+    world_.reset(new World);
+    world_->init_standalone();
+}
+
+Viewer::~Viewer() {
+}
+
+int64_t Viewer::get_player_id() {
+    return 1;
+}
+
+
+void Viewer::update_view() {
+    // Get ready to delete views that aren't in use.
+    //
+    for (auto pair : anim_view_) {
+        pair.second.set_updated(false);
+    }
+
+    // Update the player's AnimView first.
+    //
+    Tangible *player = world_->tangible_get(1);
+    AnimView *player_view = &anim_view_[1];
+    player_view->update_from(player->anim_queue_);
+
+    // Find out where's the center of the world.
+    //
+    std::string plane = player_view->get_plane();
+    util::XYZ xyz = player_view->get_xyz();
+
+    // Get a list of everything near the player.
+    //
+    tangibles_ = world_->scan_radius(plane, xyz.x, xyz.y, 100.0);
+
+    // Update AnimViews for every tangible near the player.
+    //
+    for (int64_t id : tangibles_) {
+        Tangible *tan = world_->tangible_get(id);
+        assert (tan != nullptr);
+        anim_view_[id].update_from(tan->anim_queue_);
+    }
+
+    // Delete any AnimView that was not updated.
+    //
+    for (auto iter = anim_view_.begin(); iter != anim_view_.end(); ) {
+        if (iter->second.updated()) {
+            iter++;
+        } else {
+            iter = anim_view_.erase(iter);
+        }
+    }
+}
+
+const std::vector<int64_t> &Viewer::get_tangibles_near_player() {
+    return tangibles_;
+}
+
+AnimView *Viewer::get_animation_view(int64_t id) {
+    auto iter = anim_view_.find(id);
+    if (iter == anim_view_.end()) {
+        return nullptr;
+    } else {
+        return &iter->second;
+    }
+}
+
+// Get the menu of the specified tangible.
+//
+std::vector<std::string> Viewer::get_menu(int64_t id) {
+    std::vector<std::string> result;
+    result.push_back("north");
+    result.push_back("south");
+    result.push_back("east");
+    result.push_back("west");
+    result.push_back("build");
+    result.push_back("destroy");
+    return result;
+}
+
+void Viewer::choose_menu_item(int64_t id, const std::string &item) {
+}
+
+void Viewer::advance_clock() {
+};