- Added S_ChangeSoundVolume() to change the volume of an already playing sound, accessible

through the new ACS function SoundVolume.

SVN r4318 (trunk)

src/p_acs.cpp

@@ -4134,6 +4134,7 @@ enum EACSFunctions
 	ACSF_StrMid,
 	ACSF_GetActorClass,
 	ACSF_GetWeapon,
+	ACSF_SoundVolume,
 
 	// ZDaemon
 	ACSF_GetTeamScore = 19620,	// (int team)
@@ -4964,6 +4965,29 @@ doplaysound:			if (!looping)
 			}
 			break;
 
+		case ACSF_SoundVolume:
+			// SoundVolume(int tid, int channel, fixed volume)
+			{
+				int chan = args[1];
+				float volume = FIXED2FLOAT(args[2]);
+
+				if (args[0] == 0)
+				{
+					S_ChangeSoundVolume(activator, chan, volume);
+				}
+				else
+				{
+					FActorIterator it(args[0]);
+					AActor *spot;
+
+					while ((spot = it.Next()) != NULL)
+					{
+						S_ChangeSoundVolume(spot, chan, volume);
+					}
+				}
+			}
+			break;
+
 		case ACSF_strcmp:
 		case ACSF_stricmp:
 			if (argCount >= 2)