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

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