From 8039db5ff235266f76eb26fc3cbcec521156d28b Mon Sep 17 00:00:00 2001
From: helixhorned <helixhorned@1a8010ca-5511-0410-912e-c29ae57300e0>
Date: Mon, 13 Aug 2012 18:25:53 +0000
Subject: [PATCH] Hacks for the splitscreen mod: play sounds from both players.

The sound distance is the minimum of the two.  Both point sources as well
as MUSICANDSFX ambient sound is handled.

git-svn-id: https://svn.eduke32.com/eduke32@2885 1a8010ca-5511-0410-912e-c29ae57300e0
---
 polymer/eduke32/source/actors.c | 26 +++++++++++++++----
 polymer/eduke32/source/sounds.c | 46 ++++++++++++++++++++++++++++-----
 2 files changed, 61 insertions(+), 11 deletions(-)

diff --git a/polymer/eduke32/source/actors.c b/polymer/eduke32/source/actors.c
index f36205beb..42aeb2738 100644
--- a/polymer/eduke32/source/actors.c
+++ b/polymer/eduke32/source/actors.c
@@ -1217,7 +1217,6 @@ BOLT:
 ACTOR_STATIC void G_MoveFX(void)
 {
     int32_t i = headspritestat[STAT_FX], j, nexti;
-    int32_t x, ht;
     spritetype *s;
 
     while (i >= 0)
@@ -1240,8 +1239,8 @@ ACTOR_STATIC void G_MoveFX(void)
             break;
 
         case MUSICANDSFX__STATIC:
-
-            ht = s->hitag;
+        {
+            const int32_t ht = s->hitag;
 
             if (T2 != ud.config.SoundToggle)
             {
@@ -1251,7 +1250,15 @@ ACTOR_STATIC void G_MoveFX(void)
 
             if (s->lotag >= 1000 && s->lotag < 2000)
             {
-                x = ldist(&sprite[g_player[screenpeek].ps->i],s);
+                int32_t x = ldist(&sprite[g_player[screenpeek].ps->i],s);
+
+                if (g_fakeMultiMode && ud.multimode==2)
+                {
+                    // HACK for splitscreen mod
+                    int32_t otherdist = ldist(&sprite[g_player[1].ps->i],s);
+                    x = min(x, otherdist);
+                }
+
                 if (x < ht && T1 == 0)
                 {
                     FX_SetReverb(s->lotag - 1000);
@@ -1268,7 +1275,15 @@ ACTOR_STATIC void G_MoveFX(void)
             {
                 if ((g_sounds[s->lotag].m&2))
                 {
-                    x = dist(&sprite[g_player[screenpeek].ps->i],s);
+                    int32_t x = dist(&sprite[g_player[screenpeek].ps->i],s);
+
+                    if (g_fakeMultiMode && ud.multimode==2)
+                    {
+                        // HACK for splitscreen mod
+                        int32_t otherdist = dist(&sprite[g_player[1].ps->i],s);
+                        x = min(x, otherdist);
+                    }
+
                     if (x < ht && T1 == 0 && FX_VoiceAvailable(g_sounds[s->lotag].pr-1))
                     {
                         if (g_numEnvSoundsPlaying == ud.config.NumVoices)
@@ -1312,6 +1327,7 @@ ACTOR_STATIC void G_MoveFX(void)
             }
             break;
         }
+        }
 BOLT:
         i = nexti;
     }
diff --git a/polymer/eduke32/source/sounds.c b/polymer/eduke32/source/sounds.c
index 144642794..3f4aa3fcc 100644
--- a/polymer/eduke32/source/sounds.c
+++ b/polymer/eduke32/source/sounds.c
@@ -400,6 +400,13 @@ static inline int32_t find_free_slot(int32_t num)
     return j;
 }
 
+static inline int32_t get_sound_ang(int32_t camang, const vec3_t *cam, const vec3_t *pos)
+{
+    int32_t sndang = 2048 + camang - getangle(cam->x-pos->x, cam->y-pos->y);
+    sndang &= 2047;
+    return sndang;
+}
+
 static int32_t S_CalcDistAndAng(int32_t i, int32_t num, int32_t camsect, int32_t camang,
                                 const vec3_t *cam, const vec3_t *pos,
                                 int32_t *sndistptr, int32_t *sndangptr)
@@ -410,17 +417,44 @@ static int32_t S_CalcDistAndAng(int32_t i, int32_t num, int32_t camsect, int32_t
     if (PN == APLAYER && sprite[i].yvel == screenpeek)
     {
         sndang = sndist = 0;
+        goto sound_further_processing;
     }
-    else
+
+    sndang = get_sound_ang(camang, cam, pos);
+
+    sndist = FindDistance3D(cam->x-pos->x, cam->y-pos->y, (cam->z-pos->z)>>4);
+
+    if (g_fakeMultiMode && ud.multimode==2)
     {
-        sndang = 2048 + camang - getangle(cam->x-pos->x, cam->y-pos->y);
-        sndang &= 2047;
+        // HACK for splitscreen mod: take the min of sound distances
+        // to 1st and 2nd player.
 
-        sndist = FindDistance3D(cam->x-pos->x, cam->y-pos->y, (cam->z-pos->z)>>4);
-        if ((g_sounds[num].m&16) == 0 && PN == MUSICANDSFX && SLT < 999 && (sector[SECT].lotag&0xff) < 9)
-            sndist = divscale14(sndist, SHT+1);
+        if (PN == APLAYER && sprite[i].yvel==1)
+        {
+            sndist = sndang = 0;
+            goto sound_further_processing;
+        }
+
+        {
+            const vec3_t *cam2 = &g_player[1].ps->pos;
+            int32_t sndist2 = FindDistance3D(cam2->x-pos->x, cam2->y-pos->y, (cam2->z-pos->z)>>4);
+
+            if (sndist2 < sndist)
+            {
+                cam = cam2;
+                camsect = g_player[1].ps->cursectnum;
+                camang = g_player[1].ps->ang;
+
+                sndist = sndist2;
+                sndang = get_sound_ang(camang, cam, pos);
+            }
+        }
     }
 
+    if ((g_sounds[num].m&16) == 0 && PN == MUSICANDSFX && SLT < 999 && (sector[SECT].lotag&0xff) < 9)
+        sndist = divscale14(sndist, SHT+1);
+
+sound_further_processing:
     sndist += g_sounds[num].vo;
     if (sndist < 0)
         sndist = 0;