Extract activity and weariness tracking to a helper class.

src/activity_tracker.cpp

@@ -0,0 +1,155 @@
+#include "activity_tracker.h"
+
+#include "game_constants.h"
+#include "options.h"
+#include "string_formatter.h"
+
+int activity_tracker::weariness() const
+{
+    if( intake > tracker ) {
+        return tracker * 0.5;
+    }
+    return tracker - intake * 0.5;
+}
+
+// Called every 5 minutes, when activity level is logged
+void activity_tracker::try_reduce_weariness( int bmr, bool sleeping )
+{
+    tick_counter++;
+    if( average_activity() - NO_EXERCISE <= std::numeric_limits<float>::epsilon() ) {
+        low_activity_ticks++;
+        // Recover twice as fast at rest
+        if( sleeping ) {
+            low_activity_ticks++;
+        }
+    }
+
+    const float recovery_mult = get_option<float>( "WEARY_RECOVERY_MULT" );
+
+    if( low_activity_ticks >= 6 ) {
+        int reduction = tracker;
+        // 1/20 of whichever's bigger
+        if( bmr > reduction ) {
+            reduction = bmr * recovery_mult;
+        } else {
+            reduction *= recovery_mult;
+        }
+        low_activity_ticks -= 6;
+
+        tracker -= reduction;
+    }
+
+    if( tick_counter >= 12 ) {
+        intake *= 1 - recovery_mult;
+        tick_counter -= 12;
+    }
+
+    // Normalize values, make sure we stay above 0
+    intake = std::max( intake, 0 );
+    tracker = std::max( tracker, 0 );
+    tick_counter = std::max( tick_counter, 0 );
+    low_activity_ticks = std::max( low_activity_ticks, 0 );
+}
+
+void activity_tracker::weary_clear()
+{
+    tracker = 0;
+    intake = 0;
+    low_activity_ticks = 0;
+    tick_counter = 0;
+}
+
+std::string activity_tracker::debug_weary_info() const
+{
+    return string_format( "Intake: %d Tracker: %d", intake, tracker );
+}
+
+void activity_tracker::calorie_adjust( int nkcal )
+{
+    if( nkcal > 0 ) {
+        intake += nkcal;
+    } else {
+        // nkcal is negative, we need positive
+        tracker -= nkcal;
+    }
+}
+
+float activity_tracker::activity() const
+{
+    if( current_turn == calendar::turn ) {
+        return current_activity;
+    }
+    return 1.0f;
+}
+
+float activity_tracker::average_activity() const
+{
+    if( activity_reset && current_turn != calendar::turn ) {
+        return previous_activity / num_events;
+    }
+    return ( accumulated_activity + current_activity ) / num_events;
+}
+
+float activity_tracker::instantaneous_activity_level() const
+{
+    if( current_turn == calendar::turn ) {
+        return current_activity;
+    }
+    return previous_turn_activity;
+}
+
+// The idea here is the character is going about their business logging activities,
+// and log_activity() handles sorting them out, it records the largest magnitude for a given turn,
+// and then rolls the previous turn's value into the accumulator once a new activity is logged.
+// After a reset, we have to pretend the previous values weren't logged.
+void activity_tracker::log_activity( float new_level )
+{
+    current_activity = std::max( current_activity, new_level );
+    current_turn = calendar::turn;
+}
+
+void activity_tracker::new_turn()
+{
+    if( activity_reset ) {
+        activity_reset = false;
+        previous_turn_activity = current_activity;
+        current_activity = NO_EXERCISE;
+        accumulated_activity = 0.0f;
+        num_events = 1;
+    } else {
+        // This is for the last turn that had activity logged.
+        accumulated_activity += current_activity;
+        // Then handle the interventing turns that had no activity logged.
+        int num_turns = to_turns<int>( calendar::turn - current_turn );
+        if( num_turns > 1 ) {
+            accumulated_activity += ( num_turns - 1 ) * NO_EXERCISE;
+            num_events += num_turns - 1;
+        }
+        previous_turn_activity = current_activity;
+        current_activity = NO_EXERCISE;
+        num_events++;
+    }
+}
+
+void activity_tracker::reset_activity_level()
+{
+    previous_activity = accumulated_activity;
+    activity_reset = true;
+}
+
+std::string activity_tracker::activity_level_str() const
+{
+    if( current_activity <= NO_EXERCISE ) {
+        return _( "NO_EXERCISE" );
+    } else if( current_activity <= LIGHT_EXERCISE ) {
+        return _( "LIGHT_EXERCISE" );
+    } else if( current_activity <= MODERATE_EXERCISE ) {
+        return _( "MODERATE_EXERCISE" );
+    } else if( current_activity <= BRISK_EXERCISE ) {
+        return _( "BRISK_EXERCISE" );
+    } else if( current_activity <= ACTIVE_EXERCISE ) {
+        return _( "ACTIVE_EXERCISE" );
+    } else {
+        return _( "EXTRA_EXERCISE" );
+    }
+}

src/activity_tracker.h

@@ -0,0 +1,54 @@
+#pragma once
+#ifndef CATA_SRC_ACTIVITY_TRACKER_H
+#define CATA_SRC_ACTIVITY_TRACKER_H
+
+#include "calendar.h"
+
+class JsonIn;
+class JsonOut;
+
+class activity_tracker
+{
+    private:
+        float current_activity = 0.0;
+        float accumulated_activity = 0.0;
+        float previous_activity = 0.0;
+        float previous_turn_activity = 0.0;
+        time_point current_turn = calendar::turn_zero;
+        bool activity_reset = false;
+        int num_events = 0;
+
+        // Weariness metadata.
+        int tracker = 0;
+        int intake = 0;
+        // Semi-consecutive 5 minute ticks of low activity (or 2.5 if we're sleeping)
+        int low_activity_ticks = 0;
+        // How many ticks since we've decreased intake
+        int tick_counter = 0;
+    public:
+        // Logs activity level. If called multiple times in one turn, will preserve the highest.
+        void log_activity( float new_level );
+        // Informs the tracker that a new turn has started.
+        void new_turn();
+        // Resets accumulated activity level.
+        void reset_activity_level();
+        // outputs player activity level to a printable string
+        std::string activity_level_str() const;
+        // Returns activity level recorded for the current turn.
+        float activity() const;
+        // Returns average of activity level for the current period.
+        float average_activity() const;
+        // Returns the previous turn's activity level until an action is tanken on the current turn.
+        float instantaneous_activity_level() const;
+
+        int weariness() const;
+        void try_reduce_weariness( int bmr, bool sleeping );
+        void calorie_adjust( int nkcal );
+        void weary_clear();
+        std::string debug_weary_info() const;
+
+        void serialize( JsonOut &json ) const;
+        void deserialize( JsonIn &jsin );
+};
+
+#endif // CATA_SRC_ACTIVITY_TRACKER_H

src/avatar_action.cpp

@@ -144,7 +144,7 @@ bool avatar_action::move( avatar &you, map &m, const tripoint &d )
 
     // by this point we're either walking, running, crouching, or attacking, so update the activity level to match
     if( !is_riding ) {
-        you.increase_activity_level( you.current_movement_mode()->exertion_level() );
+        you.set_activity_level( you.current_movement_mode()->exertion_level() );
     }
 
     // If the player is *attempting to* move on the X axis, update facing direction of their sprite to match.