Implement tile-targeted road route construction and OpenGL 3D layered road rendering

AGENTS.md

@@ -24,13 +24,13 @@ This document serves as the primary technical specification, architecture refere
 > - **Key-Based Lookup:** Code must reference screen texts exclusively by localization keys (e.g. `localization.get("ui.button.found_city")` or equivalent lookup) resolving to the external file.
 > - Whenever new on-screen text is introduced, add its English translation entry to the external string file first before referencing its key in code.
 
-### 0.3 Session Git Branching & No-Build Directive
+### 0.3 Session Git Branching & Build Restrictions
 
 > [!IMPORTANT]
-> **Strict Agent Directive:** Every session must adhere to an isolated Git workflow and never build the project.
+> **Strict Agent Directive:** Every session must adhere to an isolated Git workflow and never build without permission.
 > - **Dedicated Session Branch:** Every session MUST work on its own git branch.
 > - **Automatic Branch Creation:** If a session does not have its own branch yet upon starting, the agent MUST generate an appropriate branch name (e.g. `session/<topic-or-task>`) and check it out immediately (`git checkout -b <branch-name>`).
-> - **Do NOT Build the Application:** The agent MUST NOT compile or build the application (never run `make`, `qmake`, `cmake`, `ninja`, compiler invocations, or build scripts). Compiling and running the application is strictly left to the user.
+> - **Do NOT Build Without Explicit Permission:** The agent MUST NOT compile or build the application (never run `make`, `qmake`, `cmake`, `ninja`, compiler invocations, or build scripts) unless explicit permission has been granted by the user.
 > - **Immediate Commits:** After making any change/edit to the project, the agent MUST immediately commit the changes to its current session branch with a clear and concise commit message (`git add <files>` and `git commit -m "..."`).
 
 ---

actionneededmanager.cpp

@@ -0,0 +1,243 @@
+#include "actionneededmanager.h"
+#include "yamlparser.h"
+#include "unit.h"
+#include "city.h"
+#include <algorithm>
+#include <set>
+#include <QDebug>
+
+ActionNeededManager::ActionNeededManager()
+    : m_elapsedGameTime(0.0)
+{
+}
+
+bool ActionNeededManager::loadConfigFile(const QString &filePath)
+{
+    YamlNode root = YamlParser::parseFile(filePath);
+    if (root.children.isEmpty()) {
+        qWarning() << "Failed to parse action needed YAML, using defaults:" << filePath;
+        return false;
+    }
+
+    const YamlNode &node = root.hasChild("action_needed") ? root["action_needed"] : root;
+
+    if (node.hasChild("enabled")) {
+        m_config.enabled = node["enabled"].asBool(true);
+    }
+    if (node.hasChild("track_idle_units")) {
+        m_config.trackIdleUnits = node["track_idle_units"].asBool(true);
+    }
+    if (node.hasChild("track_city_no_production")) {
+        m_config.trackCityNoProduction = node["track_city_no_production"].asBool(true);
+    }
+    if (node.hasChild("track_city_free_population")) {
+        m_config.trackCityFreePopulation = node["track_city_free_population"].asBool(true);
+    }
+    if (node.hasChild("max_visible_items")) {
+        m_config.maxVisibleItems = node["max_visible_items"].asInt(8);
+    }
+    if (node.hasChild("item_width")) {
+        m_config.itemWidth = node["item_width"].asInt(155);
+    }
+    if (node.hasChild("item_height")) {
+        m_config.itemHeight = node["item_height"].asInt(42);
+    }
+    if (node.hasChild("bottom_offset")) {
+        m_config.bottomOffset = node["bottom_offset"].asInt(16);
+    }
+    if (node.hasChild("item_spacing")) {
+        m_config.itemSpacing = node["item_spacing"].asInt(8);
+    }
+    if (node.hasChild("border_radius")) {
+        m_config.borderRadius = node["border_radius"].asInt(6);
+    }
+    if (node.hasChild("pulse_animation")) {
+        m_config.pulseAnimation = node["pulse_animation"].asBool(true);
+    }
+    if (node.hasChild("pulse_speed")) {
+        m_config.pulseSpeed = node["pulse_speed"].asFloat(3.0f);
+    }
+
+    if (node.hasChild("unit_idle_color")) {
+        QString hex = node["unit_idle_color"].asString("#3CA0FF");
+        m_config.unitIdleColor = QColor(hex);
+    }
+    if (node.hasChild("city_no_prod_color")) {
+        QString hex = node["city_no_prod_color"].asString("#FFA028");
+        m_config.cityNoProdColor = QColor(hex);
+    }
+    if (node.hasChild("city_free_pop_color")) {
+        QString hex = node["city_free_pop_color"].asString("#46DC82");
+        m_config.cityFreePopColor = QColor(hex);
+    }
+    if (node.hasChild("card_bg_color")) {
+        QString hex = node["card_bg_color"].asString("#121822");
+        m_config.cardBgColor = QColor(hex);
+    }
+    if (node.hasChild("card_bg_alpha")) {
+        m_config.cardBgAlpha = node["card_bg_alpha"].asInt(235);
+    }
+    m_config.cardBgColor.setAlpha(m_config.cardBgAlpha);
+
+    qDebug() << "ActionNeededManager config loaded from" << filePath;
+    return true;
+}
+
+void ActionNeededManager::update(float deltaTime, int activePlayerId,
+                                const std::vector<std::shared_ptr<Unit>> &units,
+                                const std::vector<City> &cities)
+{
+    if (!m_config.enabled) return;
+
+    m_elapsedGameTime += static_cast<double>(deltaTime);
+
+    std::set<QString> currentConditionKeys;
+
+    // 1. Idle Units waiting for action
+    if (m_config.trackIdleUnits) {
+        for (const auto &u : units) {
+            if (!u || u->isDead() || u->playerId != activePlayerId) continue;
+
+            bool isIdle = (u->state == UnitState::Idle)
+                       && (u->path.empty() || u->pathIndex >= u->path.size())
+                       && !u->hasQueuedAction()
+                       && !u->hasRoadRoute()
+                       && !u->isBuilding();
+
+            if (isIdle) {
+                QString key = QString("%1_%2").arg(static_cast<int>(ActionNeededType::UnitIdle)).arg(u->id);
+                currentConditionKeys.insert(key);
+
+                auto it = std::find_if(m_items.begin(), m_items.end(), [&](const ActionItem &item) {
+                    return item.type == ActionNeededType::UnitIdle && item.entityId == u->id;
+                });
+
+                if (it == m_items.end()) {
+                    ActionItem newItem;
+                    newItem.type = ActionNeededType::UnitIdle;
+                    newItem.entityId = u->id;
+                    newItem.firstDetectedTime = m_elapsedGameTime;
+                    newItem.dismissed = false;
+                    m_items.push_back(newItem);
+                }
+            }
+        }
+    }
+
+    // 2. Cities waiting for action
+    for (const auto &c : cities) {
+        if (c.playerId != activePlayerId) continue;
+
+        // a) City is not building anything
+        if (m_config.trackCityNoProduction) {
+            bool noProd = !c.hasActiveProject();
+            if (noProd) {
+                QString key = QString("%1_%2").arg(static_cast<int>(ActionNeededType::CityNoProduction)).arg(c.id);
+                currentConditionKeys.insert(key);
+
+                auto it = std::find_if(m_items.begin(), m_items.end(), [&](const ActionItem &item) {
+                    return item.type == ActionNeededType::CityNoProduction && item.entityId == c.id;
+                });
+
+                if (it == m_items.end()) {
+                    ActionItem newItem;
+                    newItem.type = ActionNeededType::CityNoProduction;
+                    newItem.entityId = c.id;
+                    newItem.firstDetectedTime = m_elapsedGameTime;
+                    newItem.dismissed = false;
+                    m_items.push_back(newItem);
+                }
+            }
+        }
+
+        // b) City has free / unassigned population
+        if (m_config.trackCityFreePopulation) {
+            int freePop = c.getAvailablePop();
+            if (freePop > 0) {
+                QString key = QString("%1_%2").arg(static_cast<int>(ActionNeededType::CityFreePopulation)).arg(c.id);
+                currentConditionKeys.insert(key);
+
+                auto it = std::find_if(m_items.begin(), m_items.end(), [&](const ActionItem &item) {
+                    return item.type == ActionNeededType::CityFreePopulation && item.entityId == c.id;
+                });
+
+                if (it == m_items.end()) {
+                    ActionItem newItem;
+                    newItem.type = ActionNeededType::CityFreePopulation;
+                    newItem.entityId = c.id;
+                    newItem.firstDetectedTime = m_elapsedGameTime;
+                    newItem.auxValue = freePop;
+                    newItem.dismissed = false;
+                    m_items.push_back(newItem);
+                } else {
+                    // If free population increased since it was dismissed, reactivate it!
+                    if (freePop > it->dismissedAuxValue) {
+                        it->dismissed = false;
+                    }
+                    it->auxValue = freePop;
+                }
+            }
+        }
+    }
+
+    // 3. Problem resolved -> remove from queue!
+    m_items.erase(std::remove_if(m_items.begin(), m_items.end(), [&](const ActionItem &item) {
+        return currentConditionKeys.find(item.getKey()) == currentConditionKeys.end();
+    }), m_items.end());
+}
+
+std::vector<ActionItem> ActionNeededManager::getVisibleItems() const
+{
+    std::vector<ActionItem> visible;
+    visible.reserve(m_items.size());
+    for (const auto &item : m_items) {
+        if (!item.dismissed) {
+            visible.push_back(item);
+        }
+    }
+
+    // Sort in order of oldest first (firstDetectedTime ASC)
+    std::sort(visible.begin(), visible.end(), [](const ActionItem &a, const ActionItem &b) {
+        if (a.firstDetectedTime != b.firstDetectedTime)
+            return a.firstDetectedTime < b.firstDetectedTime;
+        return a.entityId < b.entityId;
+    });
+
+    return visible;
+}
+
+int ActionNeededManager::getVisibleCount() const
+{
+    int count = 0;
+    for (const auto &item : m_items) {
+        if (!item.dismissed) {
+            count++;
+        }
+    }
+    return count;
+}
+
+void ActionNeededManager::dismissItem(ActionNeededType type, int entityId)
+{
+    for (auto &item : m_items) {
+        if (item.type == type && item.entityId == entityId) {
+            item.dismissed = true;
+            item.dismissedAuxValue = item.auxValue;
+            break;
+        }
+    }
+}
+
+void ActionNeededManager::resetDismissals()
+{
+    for (auto &item : m_items) {
+        item.dismissed = false;
+        item.dismissedAuxValue = 0;
+    }
+}
+
+void ActionNeededManager::reset()
+{
+    m_items.clear();
+    m_elapsedGameTime = 0.0;
+}

actionneededmanager.h

@@ -0,0 +1,79 @@
+#ifndef ACTIONNEEDEDMANAGER_H
+#define ACTIONNEEDEDMANAGER_H
+
+#include <QString>
+#include <QColor>
+#include <vector>
+#include <memory>
+
+class Unit;
+class City;
+
+enum class ActionNeededType {
+    UnitIdle = 0,
+    CityNoProduction = 1,
+    CityFreePopulation = 2
+};
+
+struct ActionItem {
+    ActionNeededType type = ActionNeededType::UnitIdle;
+    int entityId = -1;
+    double firstDetectedTime = 0.0; // Monotonic game time in seconds
+    int auxValue = 0;               // e.g. free population count
+    bool dismissed = false;
+    int dismissedAuxValue = 0;      // Value at the time of dismissal
+
+    QString getKey() const {
+        return QString("%1_%2").arg(static_cast<int>(type)).arg(entityId);
+    }
+};
+
+struct ActionNeededConfig {
+    bool enabled = true;
+    bool trackIdleUnits = true;
+    bool trackCityNoProduction = true;
+    bool trackCityFreePopulation = true;
+    int maxVisibleItems = 8;
+
+    int itemWidth = 155;
+    int itemHeight = 42;
+    int bottomOffset = 16;
+    int itemSpacing = 8;
+    int borderRadius = 6;
+    bool pulseAnimation = true;
+    float pulseSpeed = 3.0f;
+
+    QColor unitIdleColor = QColor(60, 160, 255);
+    QColor cityNoProdColor = QColor(255, 160, 40);
+    QColor cityFreePopColor = QColor(70, 220, 130);
+    QColor cardBgColor = QColor(18, 24, 34);
+    int cardBgAlpha = 235;
+};
+
+class ActionNeededManager {
+public:
+    ActionNeededManager();
+
+    bool loadConfigFile(const QString &filePath);
+    const ActionNeededConfig& config() const { return m_config; }
+
+    void update(float deltaTime, int activePlayerId,
+                const std::vector<std::shared_ptr<Unit>> &units,
+                const std::vector<City> &cities);
+
+    std::vector<ActionItem> getVisibleItems() const;
+    int getVisibleCount() const;
+
+    void dismissItem(ActionNeededType type, int entityId);
+    void resetDismissals();
+
+    double getElapsedGameTime() const { return m_elapsedGameTime; }
+    void reset();
+
+private:
+    ActionNeededConfig m_config;
+    std::vector<ActionItem> m_items;
+    double m_elapsedGameTime;
+};
+
+#endif // ACTIONNEEDEDMANAGER_H

city.h

@@ -55,6 +55,7 @@ public:
     int accumulatedLabor = 0; // Local resource (Arbeid)
 
     CityProject currentProject;
+    std::vector<CityProject> projectQueue;
     std::vector<QString> completedBuildings; // IDs of completed buildings in the city
 
     std::vector<std::pair<int, int>> territory; // Owned hex coordinates
@@ -77,6 +78,34 @@ public:
         return true;
     }
 
+    bool isBuildingQueuedOrBuilt(const QString &buildingId) const {
+        if (hasBuilding(buildingId)) return true;
+        if (currentProject.isValid() && currentProject.type == CityProjectType::Building && currentProject.id == buildingId) return true;
+        for (const auto &q : projectQueue) {
+            if (q.type == CityProjectType::Building && q.id == buildingId) return true;
+        }
+        return false;
+    }
+
+    int getQueuedBuildingPosition(const QString &buildingId) const {
+        for (size_t i = 0; i < projectQueue.size(); ++i) {
+            if (projectQueue[i].type == CityProjectType::Building && projectQueue[i].id == buildingId) {
+                return (int)i + 1;
+            }
+        }
+        return 0;
+    }
+
+    int getQueuedUnitCount(const QString &unitId) const {
+        int count = 0;
+        for (const auto &q : projectQueue) {
+            if (q.type == CityProjectType::Unit && q.id == unitId) {
+                count++;
+            }
+        }
+        return count;
+    }
+
     bool hasActiveProject() const {
         return currentProject.isValid();
     }
@@ -90,8 +119,53 @@ public:
         currentProject.district = district.isEmpty() ? "center" : district;
     }
 
+    bool queueProject(CityProjectType type, const QString &projId, const QString &projName, int cost, const QString &district = "center", int maxQueueSize = 6) {
+        if (!hasActiveProject()) {
+            startProject(type, projId, projName, cost, district);
+            return true;
+        }
+        if ((int)projectQueue.size() >= maxQueueSize) {
+            return false;
+        }
+        CityProject q;
+        q.type = type;
+        q.id = projId;
+        q.name = projName;
+        q.laborCost = std::max(1, cost);
+        q.currentLabor = 0;
+        q.district = district.isEmpty() ? "center" : district;
+        projectQueue.push_back(q);
+        return true;
+    }
+
+    void cancelActiveProject() {
+        if (!projectQueue.empty()) {
+            currentProject = projectQueue.front();
+            projectQueue.erase(projectQueue.begin());
+        } else {
+            currentProject = CityProject();
+        }
+    }
+
     void cancelProject() {
-        currentProject = CityProject();
+        cancelActiveProject();
+    }
+
+    bool removeQueuedProject(int index) {
+        if (index >= 0 && index < (int)projectQueue.size()) {
+            projectQueue.erase(projectQueue.begin() + index);
+            return true;
+        }
+        return false;
+    }
+
+    void advanceQueue() {
+        if (!projectQueue.empty()) {
+            currentProject = projectQueue.front();
+            projectQueue.erase(projectQueue.begin());
+        } else {
+            currentProject = CityProject();
+        }
     }
 
     bool addTerritory(int tx, int ty) {

config/action_needed.yaml

@@ -0,0 +1,23 @@
+# Configuration for the Action Needed Queue (Bottom HUD notification bar)
+action_needed:
+  enabled: true
+  track_idle_units: true
+  track_city_no_production: true
+  track_city_free_population: true
+  max_visible_items: 8
+
+  # Visual & Layout parameters
+  item_width: 155
+  item_height: 42
+  bottom_offset: 16
+  item_spacing: 8
+  border_radius: 6
+  pulse_animation: true
+  pulse_speed: 3.0
+
+  # Colors
+  unit_idle_color: "#3CA0FF"
+  city_no_prod_color: "#FFA028"
+  city_free_pop_color: "#46DC82"
+  card_bg_color: "#121822"
+  card_bg_alpha: 235

config/city.yaml

@@ -14,6 +14,7 @@ tile_culture_cost: 10000
 food_to_inhabitants_ratio: 1.0
 default_unit_labor_cost: 1000
 unit_labor_cost_multiplier: 20
+max_production_queue_size: 6
 
 # Base yield breakdown per resource (default 500 per tick)
 base_yields:

config/roads.yaml

@@ -12,6 +12,7 @@ types:
     color: "#c49a62"
     border_color: "#6b4b23"
     width: 3.5
+    world_width: 0.11
     cost: 5
   stone:
     id: "stone"
@@ -20,6 +21,7 @@ types:
     color: "#9aa1a8"
     border_color: "#464b50"
     width: 4.0
+    world_width: 0.13
     cost: 15
   rail:
     id: "rail"
@@ -28,4 +30,5 @@ types:
     color: "#3a3c40"
     border_color: "#181a1c"
     width: 4.5
+    world_width: 0.15
     cost: 30

config/strings_en.yaml

@@ -102,7 +102,7 @@ ui:
     tip_build_farm: "Build Farm (F)"
     tip_farm_building: "Busy building... %1%"
     tip_farm_queued: "Build Farm (Queued on arrival - click to cancel)"
-    tip_build_road: "Build Road (R)"
+    tip_build_road: "Build Road (R) - Click target tile to build route"
     tip_road_building: "Busy building road... %1%"
     tip_road_queued: "Build Road (Queued on arrival - click to cancel)"
     road_started: "Constructing %1... (%2 ticks)"
@@ -110,6 +110,11 @@ ui:
     road_queued: "Build Road queued on arrival"
     road_already_here: "Tile already has a road!"
     cannot_build_road_water: "Roads cannot be built on water!"
+    road_route_started: "Building road route to (%1, %2)..."
+    road_route_completed: "Road route completed!"
+    road_route_cancelled: "Road route cancelled"
+    status_road_route: "Road Route: %1/%2"
+    btn_road_route: "Route (%1/%2)"
 
   improvement:
     farm: "Farm"
@@ -126,25 +131,35 @@ ui:
     national_info: "National: Culture: %L1  |  Science: %L2  |  Gold: %L3  |  Faith: %L4"
     help_text: "Click a slot to assign/free Pop | Hold a slot to choose resource | Buy tile with Culture."
     current_production: "CURRENT PRODUCTION"
+    production_panel_title: "CITY PRODUCTION"
     no_project: "No active project"
-    select_prompt: "Select a unit or building to construct"
+    select_prompt: "Select an item below to construct"
     ticks_remaining: "%1 ticks remaining (%2 / %3 Labor)"
     cancel_btn: "Cancel"
+    queue_header: "QUEUE (%1 / %2)"
+    queue_empty: "Queue is empty"
     districts_header: "DISTRICT: CITY CENTER"
     no_buildings: "No extensions built yet"
-    choose_project: "CHOOSE CITY PROJECT"
-    tab_buildings: "Buildings & Extensions"
+    choose_project: "AVAILABLE PROJECTS"
+    tab_buildings: "Buildings"
     tab_units: "Units"
     btn_build: "Build"
     btn_train: "Train"
+    btn_queue: "+ Queue"
     status_built: "BUILT"
     status_in_progress: "ACTIVE"
+    status_queued: "QUEUED #%1"
+    status_full: "FULL"
+    queue_full_float: "Production queue is full! (Max %1)"
     labor_cost_label: "%1 Labor (%2 ticks)"
     unit_trained: "%1: %2 trained!"
     building_completed: "%1: %2 completed in %3!"
     project_started: "%1: Started %2"
-    project_cancelled: "%1: Project cancelled"
+    project_queued: "%1: Added %2 to queue (#%3)"
+    project_cancelled: "%1: Cancelled %2"
+    queued_item_removed: "%1: Removed %2 from queue"
     already_built: "%1 already built in this city!"
+    already_queued: "%1 is already in the production queue!"
     growth_float: "+%1 Inhabitants | +%2 Culture"
     not_enough_culture: "Not enough Culture! (%1 needed)"
     worker_freed: "Pop worker freed"
@@ -165,3 +180,13 @@ ui:
     kennis: "Science"
     cultuur: "Culture"
     geloof: "Faith"
+
+  action_needed:
+    header_title: "ACTIONS"
+    header_tip: "Queue of items awaiting action (oldest first). Left-click to focus, Right-click to dismiss."
+    unit_idle_desc: "Needs orders"
+    city_no_production_desc: "No production"
+    city_free_pop_desc: "+%1 Free Pop"
+    dismiss_tip: "Right-click to dismiss"
+    more_items: "+%1"
+

gamemanager.cpp

@@ -58,6 +58,10 @@ void GameManager::init(const QString &baseDir, Matrix2D<TerrainPoint> *mapPoints
     QString roadsConfigPath = baseDir + "/config/roads.yaml";
     m_roadConfigManager.loadConfigFile(roadsConfigPath);
 
+    // Load action needed queue configuration
+    QString actionNeededConfigPath = baseDir + "/config/action_needed.yaml";
+    m_actionNeededManager.loadConfigFile(actionNeededConfigPath);
+
     const CityConfig &cCfg = TerrainYieldManager::instance().getCityConfig();
 
     // Initialize player national resources from configuration
@@ -133,8 +137,12 @@ void GameManager::update(float deltaTime, Matrix2D<TerrainPoint> *mapPoints, int
             if (u->isBuilding() && u->buildProgress >= 1.0f) {
                 completeUnitBuilding(*u, mapPoints, numPoints05);
             }
-            if (!u->isDead() && u->state == UnitState::Idle && u->hasQueuedAction()) {
-                processUnitActionQueue(*u, mapPoints, numPoints05);
+            if (!u->isDead() && u->state == UnitState::Idle) {
+                if (u->hasRoadRoute()) {
+                    advanceRoadRoute(*u, mapPoints, numPoints05);
+                } else if (u->hasQueuedAction()) {
+                    processUnitActionQueue(*u, mapPoints, numPoints05);
+                }
             }
         }
     }
@@ -162,6 +170,9 @@ void GameManager::update(float deltaTime, Matrix2D<TerrainPoint> *mapPoints, int
             ++it;
         }
     }
+
+    // Update Action Needed Queue for active human player 1
+    m_actionNeededManager.update(deltaTime, 1, m_units, m_cities);
 }
 
 Unit* GameManager::getSelectedUnit()
@@ -255,7 +266,7 @@ QMap<QString, int> GameManager::getTileYields(int tx, int ty, Matrix2D<TerrainPo
     const CityConfig &cCfg = TerrainYieldManager::instance().getCityConfig();
     QStringList resources = cCfg.resourcePriority;
     if (resources.isEmpty()) {
-        resources = {"voedsel", "arbeid", "goud", "kennis", "cultuur", "geloof"};
+        resources = QStringList{"voedsel", "arbeid", "goud", "kennis", "cultuur", "geloof"};
     }
 
     QString tType = TerrainYieldManager::instance().getTerrainType(tx, ty, mapPoints, numPoints05);
@@ -293,7 +304,7 @@ QString GameManager::getBestTileResource(int tx, int ty, Matrix2D<TerrainPoint>
     const CityConfig &cCfg = TerrainYieldManager::instance().getCityConfig();
     QStringList priority = cCfg.resourcePriority;
     if (priority.isEmpty()) {
-        priority = {"voedsel", "arbeid", "goud", "kennis", "cultuur", "geloof"};
+        priority = QStringList{"voedsel", "arbeid", "goud", "kennis", "cultuur", "geloof"};
     }
 
     QMap<QString, int> yields = getTileYields(tx, ty, mapPoints, numPoints05);
@@ -455,41 +466,106 @@ bool GameManager::buyTileForCity(int cityId, int tx, int ty)
     return true;
 }
 
-void GameManager::setCityProject(int cityId, CityProjectType type, const QString &id)
+void GameManager::queueCityProject(int cityId, CityProjectType type, const QString &id)
 {
     City *city = getCityById(cityId);
     if (!city) return;
 
+    const CityConfig &cCfg = TerrainYieldManager::instance().getCityConfig();
+    int maxQueue = cCfg.maxProductionQueueSize;
+
     if (type == CityProjectType::Unit) {
         const UnitConfig *uCfg = m_unitConfigManager.getConfig(id);
         if (!uCfg) return;
-        city->startProject(CityProjectType::Unit, id, uCfg->name, uCfg->laborCost);
-        QString msg = Localization::instance().get("ui.city.project_started", "%1: Started %2")
-                          .arg(city->name).arg(uCfg->name);
-        addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 230, 80), 2.5f);
+
+        if (!city->hasActiveProject()) {
+            city->startProject(CityProjectType::Unit, id, uCfg->name, uCfg->laborCost);
+            QString msg = Localization::instance().get("ui.city.project_started", "%1: Started %2")
+                              .arg(city->name).arg(uCfg->name);
+            addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 230, 80), 2.5f);
+        } else {
+            if ((int)city->projectQueue.size() >= maxQueue) {
+                QString msg = Localization::instance().get("ui.city.queue_full_float", "Production queue is full! (Max %1)").arg(maxQueue);
+                addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 100, 100), 2.0f);
+                return;
+            }
+            city->queueProject(CityProjectType::Unit, id, uCfg->name, uCfg->laborCost, "center", maxQueue);
+            int pos = (int)city->projectQueue.size();
+            QString msg = Localization::instance().get("ui.city.project_queued", "%1: Added %2 to queue (#%3)")
+                              .arg(city->name).arg(uCfg->name).arg(pos);
+            addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(100, 200, 255), 2.2f);
+        }
     } else if (type == CityProjectType::Building) {
         const BuildingConfig *bCfg = m_buildingConfigManager.getBuilding(id);
         if (!bCfg) return;
+
         if (city->hasBuilding(id)) {
-            QString msg = Localization::instance().get("ui.city.already_built", "%1 already built!").arg(bCfg->name);
+            QString msg = Localization::instance().get("ui.city.already_built", "%1 already built in this city!").arg(bCfg->name);
             addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 100, 100), 2.2f);
             return;
         }
-        city->startProject(CityProjectType::Building, id, bCfg->name, bCfg->laborCost, bCfg->district);
-        QString msg = Localization::instance().get("ui.city.project_started", "%1: Started %2")
-                          .arg(city->name).arg(bCfg->name);
-        addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 230, 80), 2.5f);
+
+        if (city->isBuildingQueuedOrBuilt(id)) {
+            QString msg = Localization::instance().get("ui.city.already_queued", "%1 is already in the production queue!").arg(bCfg->name);
+            addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 160, 60), 2.2f);
+            return;
+        }
+
+        if (!city->hasActiveProject()) {
+            city->startProject(CityProjectType::Building, id, bCfg->name, bCfg->laborCost, bCfg->district);
+            QString msg = Localization::instance().get("ui.city.project_started", "%1: Started %2")
+                              .arg(city->name).arg(bCfg->name);
+            addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 230, 80), 2.5f);
+        } else {
+            if ((int)city->projectQueue.size() >= maxQueue) {
+                QString msg = Localization::instance().get("ui.city.queue_full_float", "Production queue is full! (Max %1)").arg(maxQueue);
+                addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 100, 100), 2.0f);
+                return;
+            }
+            city->queueProject(CityProjectType::Building, id, bCfg->name, bCfg->laborCost, bCfg->district, maxQueue);
+            int pos = (int)city->projectQueue.size();
+            QString msg = Localization::instance().get("ui.city.project_queued", "%1: Added %2 to queue (#%3)")
+                              .arg(city->name).arg(bCfg->name).arg(pos);
+            addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(100, 200, 255), 2.2f);
+        }
     }
 }
 
+void GameManager::setCityProject(int cityId, CityProjectType type, const QString &id)
+{
+    queueCityProject(cityId, type, id);
+}
+
 void GameManager::cancelCityProject(int cityId)
 {
     City *city = getCityById(cityId);
     if (!city || !city->hasActiveProject()) return;
 
-    QString msg = Localization::instance().get("ui.city.project_cancelled", "%1: Project cancelled").arg(city->name);
+    QString cancelledName = city->currentProject.name;
+    city->cancelActiveProject();
+
+    QString msg = Localization::instance().get("ui.city.project_cancelled", "%1: Cancelled %2").arg(city->name).arg(cancelledName);
     addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 180, 80), 2.0f);
-    city->cancelProject();
+
+    if (city->hasActiveProject()) {
+        QString nextMsg = Localization::instance().get("ui.city.project_started", "%1: Started %2")
+                              .arg(city->name).arg(city->currentProject.name);
+        addFloatingText(nextMsg, city->worldPos + QVector3D(0.0f, 0.0f, 1.4f), QColor(255, 230, 80), 2.5f);
+    }
+}
+
+void GameManager::removeQueuedCityProject(int cityId, int queueIndex)
+{
+    City *city = getCityById(cityId);
+    if (!city) return;
+
+    if (queueIndex >= 0 && queueIndex < (int)city->projectQueue.size()) {
+        QString itemName = city->projectQueue[queueIndex].name;
+        city->removeQueuedProject(queueIndex);
+        QString msg = Localization::instance().get("ui.city.queued_item_removed", "%1: Removed %2 from queue")
+                          .arg(city->name).arg(itemName);
+        addFloatingText(msg, city->worldPos + QVector3D(0.0f, 0.0f, 1.2f), QColor(255, 170, 80), 2.0f);
+    }
 }
 
 void GameManager::completeCityProject(City &city, Matrix2D<TerrainPoint> *mapPoints, int numPoints05)
@@ -540,8 +616,16 @@ void GameManager::completeCityProject(City &city, Matrix2D<TerrainPoint> *mapPoi
     }
 
     int excess = city.currentProject.currentLabor - city.currentProject.laborCost;
-    city.accumulatedLabor += std::max(0, excess);
-    city.cancelProject();
+    city.advanceQueue();
+
+    if (city.hasActiveProject() && excess > 0) {
+        city.currentProject.currentLabor += excess;
+        if (city.currentProject.currentLabor >= city.currentProject.laborCost) {
+            completeCityProject(city, mapPoints, numPoints05);
+        }
+    } else {
+        city.accumulatedLabor += std::max(0, excess);
+    }
 }
 
 void GameManager::commandMoveSelected(int targetX, int targetY, Matrix2D<TerrainPoint> *mapPoints, int numPoints05)
@@ -590,6 +674,7 @@ void GameManager::commandMoveSelected(int targetX, int targetY, Matrix2D<Terrain
 
     if (path.size() > 1) {
         selected->clearActionQueue();
+        selected->clearRoadRoute();
         selected->setPath(path);
         addFloatingText(Localization::instance().get("ui.unit.moving", "Moving"),
                         selected->worldPos + QVector3D(0, 0, 0.8f), QColor(255, 230, 80));
@@ -959,6 +1044,86 @@ void GameManager::commandBuildRoadSelected(Matrix2D<TerrainPoint> *mapPoints, in
                     selected->worldPos + QVector3D(0, 0, 0.8f), QColor(255, 220, 80), 2.0f);
 }
 
+void GameManager::commandBuildRoadToTileSelected(int targetX, int targetY, Matrix2D<TerrainPoint> *mapPoints, int numPoints05)
+{
+    Unit *selected = getSelectedUnit();
+    if (!selected || !selected->config.canBuildRoad()) return;
+
+    if (!TerrainMovementManager::instance().isHexPassable(
+            targetX, targetY, MovementDomain::Land, mapPoints, numPoints05, &selected->config)) {
+        addFloatingText(Localization::instance().get("ui.unit.cannot_build_road_water", "Roads cannot be built on water!"),
+                        selected->worldPos + QVector3D(0, 0, 0.8f), QColor(255, 80, 80));
+        return;
+    }
+
+    // Pathfind from current tile to target tile
+    std::vector<std::pair<int, int>> route = Pathfinder::findPath(
+        selected->tileX, selected->tileY, targetX, targetY,
+        MovementDomain::Land, mapPoints, numPoints05, &selected->config
+    );
+
+    if (route.empty()) {
+        addFloatingText(Localization::instance().get("ui.unit.no_path", "No reachable path!"),
+                        selected->worldPos + QVector3D(0, 0, 0.8f), QColor(255, 90, 90));
+        return;
+    }
+
+    selected->clearActionQueue();
+    selected->startRoadRoute(route);
+
+    QString defaultType = m_roadConfigManager.defaultRoadType();
+    const RoadTypeConfig *rCfg = m_roadConfigManager.getRoadType(defaultType);
+    QString roadName = rCfg ? rCfg->name : "Road";
+
+    addFloatingText(Localization::instance().get("ui.unit.road_route_started", "Building road route to (%1, %2)...").arg(targetX).arg(targetY),
+                    selected->worldPos + QVector3D(0, 0, 0.8f), QColor(255, 220, 80), 2.2f);
+
+    advanceRoadRoute(*selected, mapPoints, numPoints05);
+}
+
+void GameManager::advanceRoadRoute(Unit &unit, Matrix2D<TerrainPoint> *mapPoints, int numPoints05)
+{
+    if (!unit.hasRoadRoute()) return;
+
+    while (unit.roadRouteIndex < unit.roadRoute.size()) {
+        auto nextHex = unit.roadRoute[unit.roadRouteIndex];
+        int tx = nextHex.first;
+        int ty = nextHex.second;
+
+        // If unit is not on this tile yet, move to it!
+        if (unit.tileX != tx || unit.tileY != ty) {
+            unit.setPath({ {unit.tileX, unit.tileY}, {tx, ty} });
+            unit.state = UnitState::Moving;
+            return;
+        }
+
+        // Unit is on this tile! Does it already have a road?
+        if (hasRoadAt(tx, ty)) {
+            // Already has a road, skip to next tile along route
+            unit.advanceRoadRouteStep();
+            continue;
+        }
+
+        // Start building road on this tile
+        QString defaultType = m_roadConfigManager.defaultRoadType();
+        const RoadTypeConfig *rCfg = m_roadConfigManager.getRoadType(defaultType);
+        QString roadName = rCfg ? rCfg->name : "Road";
+        int ticks = m_roadConfigManager.buildDurationTicks();
+        float duration = (float)ticks * m_movementTickDuration;
+        unit.startBuilding(QString("road:%1").arg(defaultType), duration);
+        addFloatingText(Localization::instance().get("ui.unit.road_started", "Constructing %1... (%2 ticks)").arg(roadName).arg(ticks),
+                        unit.worldPos + QVector3D(0, 0, 0.8f), QColor(255, 220, 80), 2.0f);
+        return;
+    }
+
+    // Finished entire route!
+    unit.clearRoadRoute();
+    QVector2D w = Pathfinder::hexToWorld(unit.tileX, unit.tileY);
+    float gz = Unit::getTerrainHeight(w.x(), w.y(), mapPoints, numPoints05);
+    addFloatingText(Localization::instance().get("ui.unit.road_route_completed", "Road route completed!"),
+                    QVector3D(w.x(), w.y(), gz + 1.2f), QColor(100, 255, 140), 3.0f);
+}
+
 void GameManager::completeUnitBuilding(Unit &unit, Matrix2D<TerrainPoint> *mapPoints, int numPoints05)
 {
     int tx = unit.tileX;
@@ -981,6 +1146,11 @@ void GameManager::completeUnitBuilding(Unit &unit, Matrix2D<TerrainPoint> *mapPo
         QString roadName = rCfg ? rCfg->name : "Road";
         addFloatingText(Localization::instance().get("ui.unit.road_completed", "%1 completed!").arg(roadName),
                         QVector3D(w.x(), w.y(), gz + 1.2f), QColor(240, 210, 100), 2.8f);
+
+        if (unit.hasRoadRoute()) {
+            unit.advanceRoadRouteStep();
+            advanceRoadRoute(unit, mapPoints, numPoints05);
+        }
         return;
     }
 

gamemanager.h

@@ -13,7 +13,7 @@
 #include "matrix2d.h"
 #include "terrain.h"
 #include "terrainyieldmanager.h"
-#include "roadconfig.h"
+#include "actionneededmanager.h"
 
 enum class ActionMode {
     None,
@@ -24,23 +24,6 @@ enum class ActionMode {
     BuildRoad
 };
 
-struct TileRoad {
-    QString roadTypeId = "dirt"; // "dirt", "stone", "rail"
-    int tileX = 0;
-    int tileY = 0;
-    int playerId = 1;
-    unsigned char connectionMask = 0; // 6 bits: bit e (0..5) is 1 if connected to neighbor across edge e
-    QVector3D worldPos;
-
-    bool hasConnection(int edge) const {
-        return (connectionMask & (1 << (edge % 6))) != 0;
-    }
-    void setConnection(int edge, bool connected) {
-        if (connected) connectionMask |= (1 << (edge % 6));
-        else connectionMask &= ~(1 << (edge % 6));
-    }
-};
-
 struct TileImprovement {
     QString improvementId; // "farm"
     int tileX;
@@ -70,6 +53,8 @@ public:
     const BuildingConfigManager& buildingConfigs() const { return m_buildingConfigManager; }
     RoadConfigManager& roadConfigs() { return m_roadConfigManager; }
     const RoadConfigManager& roadConfigs() const { return m_roadConfigManager; }
+    ActionNeededManager& actionNeededManager() { return m_actionNeededManager; }
+    const ActionNeededManager& actionNeededManager() const { return m_actionNeededManager; }
 
     const std::vector<std::shared_ptr<Unit>>& getUnits() const { return m_units; }
     const std::vector<City>& getCities() const { return m_cities; }
@@ -108,8 +93,10 @@ public:
     bool isTileOwned(int tx, int ty, int *outOwnerCityId = nullptr) const;
     bool buyTileForCity(int cityId, int tx, int ty);
 
+    void queueCityProject(int cityId, CityProjectType type, const QString &id);
     void setCityProject(int cityId, CityProjectType type, const QString &id);
     void cancelCityProject(int cityId);
+    void removeQueuedCityProject(int cityId, int queueIndex);
     void completeCityProject(City &city, Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
 
     void commandMoveSelected(int targetX, int targetY, Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
@@ -117,6 +104,8 @@ public:
     void commandBuildCitySelected(Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
     void commandBuildFarmSelected(Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
     void commandBuildRoadSelected(Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
+    void commandBuildRoadToTileSelected(int targetX, int targetY, Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
+    void advanceRoadRoute(Unit &unit, Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
     void completeUnitBuilding(Unit &unit, Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
     void processUnitActionQueue(Unit &unit, Matrix2D<TerrainPoint> *mapPoints, int numPoints05);
 
@@ -159,6 +148,7 @@ private:
     UnitConfigManager m_unitConfigManager;
     BuildingConfigManager m_buildingConfigManager;
     RoadConfigManager m_roadConfigManager;
+    ActionNeededManager m_actionNeededManager;
     std::vector<std::shared_ptr<Unit>> m_units;
     std::vector<City> m_cities;
     std::vector<FloatingText> m_floatingTexts;

qscenerenderer.h

@@ -56,7 +56,6 @@ protected:
     void drawFloatingTexts(QPainter &painter, const QMatrix4x4 &vMatrix);
     // City & Territory Overlays
     void drawCityBorders(QPainter &painter, const QMatrix4x4 &vMatrix);
-    void drawRoadsOverlay(QPainter &painter, const QMatrix4x4 &vMatrix);
     void drawImprovementsOverlay(QPainter &painter, const QMatrix4x4 &vMatrix);
     void drawCityViewOverlay(QPainter &painter, const QMatrix4x4 &vMatrix);
     bool screenToHex(const QPoint &screenPos, const QMatrix4x4 &vMatrix, int &outX, int &outY);
@@ -143,6 +142,12 @@ protected:
     };
     std::vector<CityProjectHit> m_cityProjectHits;
 
+    struct CityQueueItemHit {
+        QRect rect;
+        int queueIndex;
+    };
+    std::vector<CityQueueItemHit> m_cityQueueItemHits;
+
     QRect m_cancelProjectBtnRect;
     int m_cityProjectTab = 0; // 0 = Buildings, 1 = Units
     QRect m_tabBuildingsRect;

roadconfig.cpp

@@ -17,6 +17,7 @@ RoadConfigManager::RoadConfigManager()
     dirt.colorStr = "#c49a62";
     dirt.borderColorStr = "#6b4b23";
     dirt.width = 3.5f;
+    dirt.worldWidth = 0.11f;
     dirt.cost = 5;
     m_types["dirt"] = dirt;
 
@@ -27,6 +28,7 @@ RoadConfigManager::RoadConfigManager()
     stone.colorStr = "#9aa1a8";
     stone.borderColorStr = "#464b50";
     stone.width = 4.0f;
+    stone.worldWidth = 0.13f;
     stone.cost = 15;
     m_types["stone"] = stone;
 
@@ -37,6 +39,7 @@ RoadConfigManager::RoadConfigManager()
     rail.colorStr = "#3a3c40";
     rail.borderColorStr = "#181a1c";
     rail.width = 4.5f;
+    rail.worldWidth = 0.15f;
     rail.cost = 30;
     m_types["rail"] = rail;
 }
@@ -72,6 +75,7 @@ bool RoadConfigManager::loadConfigFile(const QString &filePath)
             rCfg.colorStr = it.value().hasChild("color") ? it.value()["color"].asString("#c49a62") : "#c49a62";
             rCfg.borderColorStr = it.value().hasChild("border_color") ? it.value()["border_color"].asString("#6b4b23") : "#6b4b23";
             rCfg.width = it.value().hasChild("width") ? it.value()["width"].asFloat(3.5f) : 3.5f;
+            rCfg.worldWidth = it.value().hasChild("world_width") ? it.value()["world_width"].asFloat(0.11f) : 0.11f;
             rCfg.cost = it.value().hasChild("cost") ? it.value()["cost"].asInt(5) : 5;
             m_types[rCfg.id] = rCfg;
         }

roadconfig.h

@@ -4,6 +4,24 @@
 #include <QString>
 #include <QMap>
 #include <QColor>
+#include <QVector3D>
+
+struct TileRoad {
+    QString roadTypeId = "dirt"; // "dirt", "stone", "rail"
+    int tileX = 0;
+    int tileY = 0;
+    int playerId = 1;
+    unsigned char connectionMask = 0; // 6 bits: bit e (0..5) is 1 if connected to neighbor across edge e
+    QVector3D worldPos;
+
+    bool hasConnection(int edge) const {
+        return (connectionMask & (1 << (edge % 6))) != 0;
+    }
+    void setConnection(int edge, bool connected) {
+        if (connected) connectionMask |= (1 << (edge % 6));
+        else connectionMask &= ~(1 << (edge % 6));
+    }
+};
 
 struct RoadTypeConfig {
     QString id = "dirt";
@@ -12,6 +30,7 @@ struct RoadTypeConfig {
     QString colorStr = "#c49a62";
     QString borderColorStr = "#6b4b23";
     float width = 3.5f;
+    float worldWidth = 0.11f;
     int cost = 5;
 
     QColor getColor() const { return QColor(colorStr); }

terrainyieldmanager.cpp

@@ -35,6 +35,7 @@ bool TerrainYieldManager::loadConfigs(const QString &baseDir)
         m_cityConfig.baseResourceYieldPerTick = cityRoot["base_resource_yield_per_tick"].asInt(500);
         m_cityConfig.tileCultureCost = cityRoot["tile_culture_cost"].asInt(10000);
         m_cityConfig.foodToInhabitantsRatio = cityRoot["food_to_inhabitants_ratio"].asFloat(1.0f);
+        m_cityConfig.maxProductionQueueSize = cityRoot["max_production_queue_size"].asInt(6);
 
         if (cityRoot.hasChild("base_yields")) {
             const YamlNode &bNode = cityRoot["base_yields"];

terrainyieldmanager.h

@@ -34,6 +34,7 @@ struct CityConfig {
     int baseResourceYieldPerTick;
     int tileCultureCost;
     float foodToInhabitantsRatio;
+    int maxProductionQueueSize;
 
     int slotLongPressDurationMs;
     QStringList resourcePriority;
@@ -47,6 +48,7 @@ struct CityConfig {
           cityViewZoom(4.8f),
           baseResourceYieldPerTick(500), tileCultureCost(10000),
           foodToInhabitantsRatio(1.0f),
+          maxProductionQueueSize(6),
           slotLongPressDurationMs(400),
           resourcePriority({"voedsel", "arbeid", "goud", "kennis", "cultuur", "geloof"})
     {

tiletest.pro

@@ -32,7 +32,8 @@ SOURCES += main.cpp \
     unitrenderer.cpp \
     localization.cpp \
     terrainmovementmanager.cpp \
-    roadconfig.cpp
+    roadconfig.cpp \
+    actionneededmanager.cpp
 
 HEADERS  += mainwindow.h \
     qscenerenderer.h \
@@ -54,7 +55,8 @@ HEADERS  += mainwindow.h \
     unitrenderer.h \
     localization.h \
     terrainmovementmanager.h \
-    roadconfig.h
+    roadconfig.h \
+    actionneededmanager.h
 
 FORMS    += mainwindow.ui
 

unit.cpp

@@ -123,6 +123,7 @@ void Unit::stopMovement()
     moveProgress = 0.0f;
     state = UnitState::Idle;
     clearActionQueue();
+    clearRoadRoute();
 }
 
 void Unit::startBuilding(const QString &impId, float duration)

unit.h

@@ -69,6 +69,25 @@ public:
     std::deque<UnitAction> actionQueue;
     int maxQueueSize = 5;
 
+    // Road Construction Route (tile-by-tile road paving)
+    std::vector<std::pair<int, int>> roadRoute;
+    size_t roadRouteIndex = 0;
+
+    bool hasRoadRoute() const { return !roadRoute.empty() && roadRouteIndex < roadRoute.size(); }
+    void startRoadRoute(const std::vector<std::pair<int, int>> &route) {
+        roadRoute = route;
+        roadRouteIndex = 0;
+    }
+    void clearRoadRoute() {
+        roadRoute.clear();
+        roadRouteIndex = 0;
+    }
+    void advanceRoadRouteStep() {
+        if (!roadRoute.empty()) {
+            roadRouteIndex++;
+        }
+    }
+
     bool queueAction(const UnitAction &action);
     void clearActionQueue();
     bool hasQueuedAction() const { return !actionQueue.empty(); }

unitrenderer.cpp

@@ -9,13 +9,17 @@ struct VertexPN {
 };
 
 UnitRenderer::UnitRenderer()
-    : m_program(nullptr), m_vertexCount(0), m_initialized(false)
+    : m_program(nullptr), m_vertexCount(0), m_initialized(false), m_roadBuffersInitialized(false)
 {
 }
 
 UnitRenderer::~UnitRenderer()
 {
     if (m_program) delete m_program;
+    if (m_roadBuffersInitialized) {
+        m_roadVao.destroy();
+        m_roadVbo.destroy();
+    }
 }
 
 void UnitRenderer::initialize()
@@ -29,6 +33,12 @@ void UnitRenderer::initialize()
     m_program->link();
 
     buildCylinderMesh();
+
+    m_roadVao.create();
+    m_roadVbo.create();
+    m_roadVbo.setUsagePattern(QOpenGLBuffer::DynamicDraw);
+    m_roadBuffersInitialized = true;
+
     m_initialized = true;
 }
 
@@ -86,6 +96,220 @@ void UnitRenderer::buildCylinderMesh()
     m_vbo.release();
 }
 
+void UnitRenderer::renderRoads(
+    const std::map<std::pair<int, int>, TileRoad> &roads,
+    const RoadConfigManager &roadConfigs,
+    Matrix2D<TerrainPoint> *mapPoints,
+    int numPoints05,
+    const QMatrix4x4 &projection,
+    const QMatrix4x4 &vMatrix,
+    const QVector3D &lightDir,
+    int cityViewRadius,
+    int cityViewTileX,
+    int cityViewTileY)
+{
+    if (!m_initialized || !m_program || roads.empty()) return;
+
+    if (!m_roadBuffersInitialized) {
+        m_roadVao.create();
+        m_roadVbo.create();
+        m_roadVbo.setUsagePattern(QOpenGLBuffer::DynamicDraw);
+        m_roadBuffersInitialized = true;
+    }
+
+    float meanderAmp = roadConfigs.meanderAmplitude();
+    int subdivisions = std::max(2, roadConfigs.meanderSubdivisions());
+
+    struct RoadBatchGeometry {
+        std::vector<VertexPN> casingVertices;
+        std::vector<VertexPN> surfaceVertices;
+    };
+    std::unordered_map<std::string, RoadBatchGeometry> batches;
+
+    for (const auto &pair : roads) {
+        const TileRoad &road = pair.second;
+        if (cityViewRadius >= 0) {
+            if (Pathfinder::hexDistance(cityViewTileX, cityViewTileY, road.tileX, road.tileY) > cityViewRadius) {
+                continue;
+            }
+        }
+
+        const RoadTypeConfig *rCfg = roadConfigs.getRoadType(road.roadTypeId);
+        float roadW = rCfg ? rCfg->worldWidth : 0.11f;
+        float casingW = roadW + 0.035f;
+
+        QVector2D center = Pathfinder::hexToWorld(road.tileX, road.tileY);
+
+        RoadBatchGeometry &batch = batches[road.roadTypeId.toStdString()];
+
+        // If isolated tile with no connections, draw small circular depot / disk
+        if (road.connectionMask == 0) {
+            float gz = Unit::getTerrainHeight(center.x(), center.y(), mapPoints, numPoints05);
+            const int capSectors = 12;
+            const float pi = 3.14159265359f;
+            float rSurf = roadW * 0.9f;
+            float rCase = casingW * 0.9f;
+
+            for (int s = 0; s < capSectors; ++s) {
+                float a1 = 2.0f * pi * s / capSectors;
+                float a2 = 2.0f * pi * (s + 1) / capSectors;
+                batch.casingVertices.push_back({center.x(), center.y(), gz + 0.012f, 0, 0, 1});
+                batch.casingVertices.push_back({center.x() + std::cos(a1) * rCase, center.y() + std::sin(a1) * rCase, gz + 0.012f, 0, 0, 1});
+                batch.casingVertices.push_back({center.x() + std::cos(a2) * rCase, center.y() + std::sin(a2) * rCase, gz + 0.012f, 0, 0, 1});
+            }
+            for (int s = 0; s < capSectors; ++s) {
+                float a1 = 2.0f * pi * s / capSectors;
+                float a2 = 2.0f * pi * (s + 1) / capSectors;
+                batch.surfaceVertices.push_back({center.x(), center.y(), gz + 0.016f, 0, 0, 1});
+                batch.surfaceVertices.push_back({center.x() + std::cos(a1) * rSurf, center.y() + std::sin(a1) * rSurf, gz + 0.016f, 0, 0, 1});
+                batch.surfaceVertices.push_back({center.x() + std::cos(a2) * rSurf, center.y() + std::sin(a2) * rSurf, gz + 0.016f, 0, 0, 1});
+            }
+            continue;
+        }
+
+        // Center junction cap (circular disk covering junction gaps)
+        {
+            float gz = Unit::getTerrainHeight(center.x(), center.y(), mapPoints, numPoints05);
+            const int capSectors = 12;
+            const float pi = 3.14159265359f;
+            float rSurf = (roadW * 0.5f) * 1.15f;
+            float rCase = (casingW * 0.5f) * 1.15f;
+
+            for (int s = 0; s < capSectors; ++s) {
+                float a1 = 2.0f * pi * s / capSectors;
+                float a2 = 2.0f * pi * (s + 1) / capSectors;
+                batch.casingVertices.push_back({center.x(), center.y(), gz + 0.012f, 0, 0, 1});
+                batch.casingVertices.push_back({center.x() + std::cos(a1) * rCase, center.y() + std::sin(a1) * rCase, gz + 0.012f, 0, 0, 1});
+                batch.casingVertices.push_back({center.x() + std::cos(a2) * rCase, center.y() + std::sin(a2) * rCase, gz + 0.012f, 0, 0, 1});
+
+                batch.surfaceVertices.push_back({center.x(), center.y(), gz + 0.016f, 0, 0, 1});
+                batch.surfaceVertices.push_back({center.x() + std::cos(a1) * rSurf, center.y() + std::sin(a1) * rSurf, gz + 0.016f, 0, 0, 1});
+                batch.surfaceVertices.push_back({center.x() + std::cos(a2) * rSurf, center.y() + std::sin(a2) * rSurf, gz + 0.016f, 0, 0, 1});
+            }
+        }
+
+        // For each connected edge, generate meandering ribbon quad strip
+        for (int e = 0; e < 6; ++e) {
+            if (!road.hasConnection(e)) continue;
+
+            QVector2D endP = center + getHexEdgeMidpoint(e);
+            QVector2D dir = endP - center;
+            float len = dir.length();
+            QVector2D perp = (len > 0.0001f) ? QVector2D(-dir.y() / len, dir.x() / len) : QVector2D(0, 0);
+
+            float seed = std::sin(float(road.tileX * 41 + road.tileY * 113 + e * 29)) * 43758.5453f;
+            float meanderSign = (seed - std::floor(seed) > 0.5f) ? 1.0f : -1.0f;
+
+            const float pi = 3.14159265359f;
+            std::vector<QVector2D> spinePoints;
+            spinePoints.reserve(subdivisions + 1);
+
+            for (int i = 0; i <= subdivisions; ++i) {
+                float t = (float)i / (float)subdivisions;
+                float s = meanderSign * meanderAmp * std::sin(t * pi);
+                spinePoints.push_back(center + dir * t + perp * s);
+            }
+
+            float halfSurf = roadW * 0.5f;
+            float halfCase = casingW * 0.5f;
+
+            for (int i = 0; i < subdivisions; ++i) {
+                QVector2D p0 = spinePoints[i];
+                QVector2D p1 = spinePoints[i + 1];
+
+                QVector2D segDir = p1 - p0;
+                float segLen = segDir.length();
+                QVector2D segPerp = (segLen > 0.0001f) ? QVector2D(-segDir.y() / segLen, segDir.x() / segLen) : perp;
+
+                float z0 = Unit::getTerrainHeight(p0.x(), p0.y(), mapPoints, numPoints05);
+                float z1 = Unit::getTerrainHeight(p1.x(), p1.y(), mapPoints, numPoints05);
+
+                float cz0 = z0 + 0.012f;
+                float cz1 = z1 + 0.012f;
+                QVector3D cL0(p0.x() - segPerp.x() * halfCase, p0.y() - segPerp.y() * halfCase, cz0);
+                QVector3D cR0(p0.x() + segPerp.x() * halfCase, p0.y() + segPerp.y() * halfCase, cz0);
+                QVector3D cL1(p1.x() - segPerp.x() * halfCase, p1.y() - segPerp.y() * halfCase, cz1);
+                QVector3D cR1(p1.x() + segPerp.x() * halfCase, p1.y() + segPerp.y() * halfCase, cz1);
+
+                batch.casingVertices.push_back({cL0.x(), cL0.y(), cL0.z(), 0, 0, 1});
+                batch.casingVertices.push_back({cR0.x(), cR0.y(), cR0.z(), 0, 0, 1});
+                batch.casingVertices.push_back({cR1.x(), cR1.y(), cR1.z(), 0, 0, 1});
+
+                batch.casingVertices.push_back({cL0.x(), cL0.y(), cL0.z(), 0, 0, 1});
+                batch.casingVertices.push_back({cR1.x(), cR1.y(), cR1.z(), 0, 0, 1});
+                batch.casingVertices.push_back({cL1.x(), cL1.y(), cL1.z(), 0, 0, 1});
+
+                float sz0 = z0 + 0.016f;
+                float sz1 = z1 + 0.016f;
+                QVector3D sL0(p0.x() - segPerp.x() * halfSurf, p0.y() - segPerp.y() * halfSurf, sz0);
+                QVector3D sR0(p0.x() + segPerp.x() * halfSurf, p0.y() + segPerp.y() * halfSurf, sz0);
+                QVector3D sL1(p1.x() - segPerp.x() * halfSurf, p1.y() - segPerp.y() * halfSurf, sz1);
+                QVector3D sR1(p1.x() + segPerp.x() * halfSurf, p1.y() + segPerp.y() * halfSurf, sz1);
+
+                batch.surfaceVertices.push_back({sL0.x(), sL0.y(), sL0.z(), 0, 0, 1});
+                batch.surfaceVertices.push_back({sR0.x(), sR0.y(), sR0.z(), 0, 0, 1});
+                batch.surfaceVertices.push_back({sR1.x(), sR1.y(), sR1.z(), 0, 0, 1});
+
+                batch.surfaceVertices.push_back({sL0.x(), sL0.y(), sL0.z(), 0, 0, 1});
+                batch.surfaceVertices.push_back({sR1.x(), sR1.y(), sR1.z(), 0, 0, 1});
+                batch.surfaceVertices.push_back({sL1.x(), sL1.y(), sL1.z(), 0, 0, 1});
+            }
+        }
+    }
+
+    if (batches.empty()) return;
+
+    glEnable(GL_DEPTH_TEST);
+    glDepthMask(GL_TRUE);
+    glEnable(GL_POLYGON_OFFSET_FILL);
+    glPolygonOffset(-2.0f, -2.0f);
+
+    m_program->bind();
+    m_program->setUniformValue("u_lightDir", lightDir);
+    QMatrix4x4 model;
+    m_program->setUniformValue("modelMatrix", model);
+    QMatrix4x4 mvp = projection * vMatrix;
+    m_program->setUniformValue("MVP", mvp);
+
+    m_roadVao.bind();
+    m_roadVbo.bind();
+
+    for (auto &bPair : batches) {
+        const RoadTypeConfig *rCfg = roadConfigs.getRoadType(QString::fromStdString(bPair.first));
+        QColor caseCol = rCfg ? rCfg->getBorderColor() : QColor(107, 75, 35);
+        QColor surfCol = rCfg ? rCfg->getColor() : QColor(196, 154, 98);
+
+        RoadBatchGeometry &geom = bPair.second;
+
+        // Draw Casing
+        if (!geom.casingVertices.empty()) {
+            m_roadVbo.allocate(geom.casingVertices.data(), (int)(geom.casingVertices.size() * sizeof(VertexPN)));
+            m_program->enableAttributeArray(0);
+            m_program->setAttributeBuffer(0, GL_FLOAT, 0, 3, sizeof(VertexPN));
+            m_program->enableAttributeArray(1);
+            m_program->setAttributeBuffer(1, GL_FLOAT, 3 * sizeof(float), 3, sizeof(VertexPN));
+            m_program->setUniformValue("u_color", QVector4D(caseCol.redF(), caseCol.greenF(), caseCol.blueF(), 1.0f));
+            glDrawArrays(GL_TRIANGLES, 0, (GLsizei)geom.casingVertices.size());
+        }
+
+        // Draw Surface
+        if (!geom.surfaceVertices.empty()) {
+            m_roadVbo.allocate(geom.surfaceVertices.data(), (int)(geom.surfaceVertices.size() * sizeof(VertexPN)));
+            m_program->enableAttributeArray(0);
+            m_program->setAttributeBuffer(0, GL_FLOAT, 0, 3, sizeof(VertexPN));
+            m_program->enableAttributeArray(1);
+            m_program->setAttributeBuffer(1, GL_FLOAT, 3 * sizeof(float), 3, sizeof(VertexPN));
+            m_program->setUniformValue("u_color", QVector4D(surfCol.redF(), surfCol.greenF(), surfCol.blueF(), 1.0f));
+            glDrawArrays(GL_TRIANGLES, 0, (GLsizei)geom.surfaceVertices.size());
+        }
+    }
+
+    m_roadVbo.release();
+    m_roadVao.release();
+    m_program->release();
+    glDisable(GL_POLYGON_OFFSET_FILL);
+}
+
 void UnitRenderer::renderUnits(
     const std::vector<std::shared_ptr<Unit>> &units,
     const std::vector<City> &cities,

unitrenderer.h

@@ -10,9 +10,13 @@
 #include <QPointF>
 #include <vector>
 #include <memory>
+#include <map>
 #include "unit.h"
 #include "player.h"
 #include "city.h"
+#include "roadconfig.h"
+#include "matrix2d.h"
+#include "terrain.h"
 
 class UnitRenderer : protected QOpenGLFunctions_4_0_Core {
 public:
@@ -20,6 +24,18 @@ public:
     ~UnitRenderer();
 
     void initialize();
+    void renderRoads(
+        const std::map<std::pair<int, int>, TileRoad> &roads,
+        const RoadConfigManager &roadConfigs,
+        Matrix2D<TerrainPoint> *mapPoints,
+        int numPoints05,
+        const QMatrix4x4 &projection,
+        const QMatrix4x4 &vMatrix,
+        const QVector3D &lightDir,
+        int cityViewRadius = -1,
+        int cityViewTileX = -1,
+        int cityViewTileY = -1
+    );
     void renderUnits(
         const std::vector<std::shared_ptr<Unit>> &units,
         const std::vector<City> &cities,
@@ -49,6 +65,10 @@ private:
     QOpenGLVertexArrayObject m_vao;
     int m_vertexCount;
     bool m_initialized;
+
+    QOpenGLBuffer m_roadVbo;
+    QOpenGLVertexArrayObject m_roadVao;
+    bool m_roadBuffersInitialized;
 };
 
 #endif // UNITRENDERER_H