Implement dash walking and zoom out again

src/client/game.cpp

@@ -613,6 +613,70 @@ bool Game::walk(Otc::Direction direction)
     return true;
 }
 
+bool Game::dashWalk(Otc::Direction direction)
+{
+    if(!canPerformGameAction())
+        return false;
+
+    // must cancel follow before any new walk
+    if(isFollowing())
+        cancelFollow();
+
+    // must cancel auto walking
+    if(m_localPlayer->isAutoWalking()) {
+        m_protocolGame->sendStop();
+        m_localPlayer->stopAutoWalk();
+    }
+
+    if(m_localPlayer->isWalking() && m_dashTimer.ticksElapsed() < std::max<int>(m_localPlayer->getStepDuration(false, direction) - m_ping, 30))
+        return false;
+
+    Position toPos = m_localPlayer->getPosition().translatedToDirection(direction);
+    TilePtr toTile = g_map.getTile(toPos);
+    // only do prewalks to walkable tiles (like grounds and not walls)
+    if(toTile && toTile->isWalkable()) {
+        if(!m_localPlayer->isWalking() && m_localPlayer->getWalkTicksElapsed() >= m_localPlayer->getStepDuration() + 100)
+            m_localPlayer->preWalk(direction);
+    // check walk to another floor (e.g: when above 3 parcels)
+    } else {
+        // check if can walk to a lower floor
+        auto canChangeFloorDown = [&]() -> bool {
+            Position pos = toPos;
+            if(!pos.down())
+                return false;
+            TilePtr toTile = g_map.getTile(pos);
+            if(toTile && toTile->hasElevation(3))
+                return true;
+            return false;
+        };
+
+        // check if can walk to a higher floor
+        auto canChangeFloorUp = [&]() -> bool {
+            TilePtr fromTile = m_localPlayer->getTile();
+            if(!fromTile || !fromTile->hasElevation(3))
+                return false;
+            Position pos = toPos;
+            if(!pos.up())
+                return false;
+            TilePtr toTile = g_map.getTile(pos);
+            if(!toTile || !toTile->isWalkable())
+                return false;
+            return true;
+        };
+
+        if(canChangeFloorDown() || canChangeFloorUp() ||
+            (!toTile || toTile->isEmpty())) {
+            m_localPlayer->lockWalk();
+        } else
+            return false;
+    }
+
+    forceWalk(direction);
+    m_dashTimer.restart();
+    m_lastWalkDir = direction;
+    return true;
+}
+
 void Game::autoWalk(std::vector<Otc::Direction> dirs)
 {
     if(!canPerformGameAction())