From 68d20787cf8540ebc22a45e6e82afbf8ad4dea15 Mon Sep 17 00:00:00 2001
From: Kae <80987908+Novaenia@users.noreply.github.com>
Date: Mon, 26 Jun 2023 19:25:37 +1000
Subject: [PATCH] The camera is now also an audio listener

---
 source/client/StarClientApplication.cpp |  2 ++
 source/frontend/StarMainMixer.cpp       | 26 ++++++++++++++++++++++---
 source/frontend/StarMainMixer.hpp       |  3 +++
 3 files changed, 28 insertions(+), 3 deletions(-)

diff --git a/source/client/StarClientApplication.cpp b/source/client/StarClientApplication.cpp
index b53a9c1..542e41b 100644
--- a/source/client/StarClientApplication.cpp
+++ b/source/client/StarClientApplication.cpp
@@ -408,6 +408,7 @@ void ClientApplication::changeState(MainAppState newState) {
 
     m_universeClient.reset();
     m_mainMixer->setUniverseClient({});
+    m_mainMixer->setWorldPainter({});
     m_titleScreen.reset();
   }
 
@@ -535,6 +536,7 @@ void ClientApplication::changeState(MainAppState newState) {
 
     m_worldPainter = make_shared<WorldPainter>();
     m_mainInterface = make_shared<MainInterface>(m_universeClient, m_worldPainter, m_cinematicOverlay);
+    m_mainMixer->setWorldPainter(m_worldPainter);
 
     if (auto renderer = Application::renderer()) {
       m_worldPainter->renderInit(renderer);
diff --git a/source/frontend/StarMainMixer.cpp b/source/frontend/StarMainMixer.cpp
index 46c26cd..c49a0fc 100644
--- a/source/frontend/StarMainMixer.cpp
+++ b/source/frontend/StarMainMixer.cpp
@@ -6,6 +6,7 @@
 #include "StarPlayer.hpp"
 #include "StarAssets.hpp"
 #include "StarWorldClient.hpp"
+#include "StarWorldPainter.hpp"
 
 namespace Star {
 
@@ -17,6 +18,10 @@ void MainMixer::setUniverseClient(UniverseClientPtr universeClient) {
   m_universeClient = move(universeClient);
 }
 
+void MainMixer::setWorldPainter(WorldPainterPtr worldPainter) {
+  m_worldPainter = move(worldPainter);
+}
+
 void MainMixer::update(bool muteSfx, bool muteMusic) {
   auto assets = Root::singleton().assets();
 
@@ -30,7 +35,7 @@ void MainMixer::update(bool muteSfx, bool muteMusic) {
           m_mixer->setGroupVolume(group, m_groupVolumes[group], 1.0f);
         }
       } else if (!m_mutedGroups.contains(group)) {
-        float volumeSetting = Root::singleton().configuration()->get(settingName).toFloat() / 100;
+        float volumeSetting = Root::singleton().configuration()->get(settingName).toFloat() / 100.0f;
         if (!m_groupVolumes.contains(group) || volumeSetting != m_groupVolumes[group]) {
           m_mixer->setGroupVolume(group, volumeSetting);
           m_groupVolumes[group] = volumeSetting;
@@ -72,11 +77,26 @@ void MainMixer::update(bool muteSfx, bool muteMusic) {
     Vec2F stereoAdjustmentRange = jsonToVec2F(assets->json("/sfx.config:stereoAdjustmentRange"));
     float attenuationGamma = assets->json("/sfx.config:attenuationGamma").toFloat();
     auto playerPos = m_universeClient->mainPlayer()->position();
+    auto cameraPos = m_worldPainter->camera().centerWorldPosition();
     auto worldGeometry = currentWorld->geometry();
 
     m_mixer->update([&](unsigned channel, Vec2F pos, float rangeMultiplier) {
-        Vec2F diff = worldGeometry.diff(pos, playerPos);
-        float diffMagnitude = diff.magnitude();
+        Vec2F playerDiff = worldGeometry.diff(pos, playerPos);
+        Vec2F cameraDiff = worldGeometry.diff(pos, cameraPos);
+        float playerMagSq = playerDiff.magnitudeSquared();
+        float cameraMagSq = cameraDiff.magnitudeSquared();
+
+        Vec2F diff;
+        float diffMagnitude;
+        if (playerMagSq < cameraMagSq) {
+          diff = playerDiff;
+          diffMagnitude = sqrt(playerMagSq);
+        }
+        else {
+          diff = cameraDiff;
+          diffMagnitude = sqrt(cameraMagSq);
+        }
+
         if (diffMagnitude == 0.0f)
           return 0.0f;
 
diff --git a/source/frontend/StarMainMixer.hpp b/source/frontend/StarMainMixer.hpp
index e0f1223..ecf9443 100644
--- a/source/frontend/StarMainMixer.hpp
+++ b/source/frontend/StarMainMixer.hpp
@@ -7,6 +7,7 @@
 namespace Star {
 
 STAR_CLASS(UniverseClient);
+STAR_CLASS(WorldPainter);
 STAR_CLASS(MainMixer);
 
 class MainMixer {
@@ -14,6 +15,7 @@ public:
   MainMixer(unsigned sampleRate, unsigned channels);
 
   void setUniverseClient(UniverseClientPtr universeClient);
+  void setWorldPainter(WorldPainterPtr worldPainter);
 
   void update(bool muteSfx = false, bool muteMusic = false);
 
@@ -24,6 +26,7 @@ public:
 
 private:
   UniverseClientPtr m_universeClient;
+  WorldPainterPtr m_worldPainter;
   MixerPtr m_mixer;
   Set<MixerGroup> m_mutedGroups;
   Map<MixerGroup, float> m_groupVolumes;