From e4b236cbccc8fc5972c072baea19896d53c365ac Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@zdoom.fake>
Date: Fri, 14 Jan 2011 22:59:20 +0000
Subject: [PATCH] - added DavidPH's A_SetMass submission.

SVN r3105 (trunk)
---
 src/p_acs.cpp                        |  7 +++++++
 src/thingdef/thingdef_codeptr.cpp    | 15 +++++++++++++++
 src/thingdef/thingdef_expression.cpp |  1 +
 wadsrc/static/actors/actor.txt       |  2 ++
 4 files changed, 25 insertions(+)

diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 497c0fbdf..72648a052 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -2543,6 +2543,7 @@ enum
 	APROP_ScaleX        = 29,
 	APROP_ScaleY        = 30,
 	APROP_Dormant		= 31,
+	APROP_Mass			= 32,
 };
 
 // These are needed for ACS's APROP_RenderStyle
@@ -2731,6 +2732,10 @@ void DLevelScript::DoSetActorProperty (AActor *actor, int property, int value)
 		actor->scaleY = value;
 		break;
 
+	case APROP_Mass:
+		actor->Mass = value;
+		break;
+
 	default:
 		// do nothing.
 		break;
@@ -2796,6 +2801,7 @@ int DLevelScript::GetActorProperty (int tid, int property)
 	case APROP_WaterLevel:	return actor->waterlevel;
 	case APROP_ScaleX: 		return actor->scaleX;
 	case APROP_ScaleY: 		return actor->scaleY;
+	case APROP_Mass: 		return actor->Mass;
 
 	default:				return 0;
 	}
@@ -2833,6 +2839,7 @@ int DLevelScript::CheckActorProperty (int tid, int property, int value)
 		case APROP_WaterLevel:
 		case APROP_ScaleX:
 		case APROP_ScaleY:
+		case APROP_Mass:
 			return (GetActorProperty(tid, property) == value);
 
 		// Boolean values need to compare to a binary version of value
diff --git a/src/thingdef/thingdef_codeptr.cpp b/src/thingdef/thingdef_codeptr.cpp
index a40c49467..1717a77e1 100644
--- a/src/thingdef/thingdef_codeptr.cpp
+++ b/src/thingdef/thingdef_codeptr.cpp
@@ -2037,6 +2037,21 @@ DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SetScale)
 	self->scaleY = scaley ? scaley : scalex;
 }
 
+//===========================================================================
+//
+// A_SetMass(int mass)
+//
+// Sets the actor's mass.
+//
+//===========================================================================
+DEFINE_ACTION_FUNCTION_PARAMS(AActor, A_SetMass)
+{
+	ACTION_PARAM_START(2);
+	ACTION_PARAM_INT(mass, 0);
+
+	self->Mass = mass;
+}
+
 //===========================================================================
 //
 // A_SpawnDebris
diff --git a/src/thingdef/thingdef_expression.cpp b/src/thingdef/thingdef_expression.cpp
index 5f7238e29..f31753b1b 100644
--- a/src/thingdef/thingdef_expression.cpp
+++ b/src/thingdef/thingdef_expression.cpp
@@ -61,6 +61,7 @@ DEFINE_MEMBER_VARIABLE(args, AActor)
 DEFINE_MEMBER_VARIABLE(ceilingz, AActor)
 DEFINE_MEMBER_VARIABLE(floorz, AActor)
 DEFINE_MEMBER_VARIABLE(health, AActor)
+DEFINE_MEMBER_VARIABLE(Mass, AActor)
 DEFINE_MEMBER_VARIABLE(pitch, AActor)
 DEFINE_MEMBER_VARIABLE(special, AActor)
 DEFINE_MEMBER_VARIABLE(special1, AActor)
diff --git a/wadsrc/static/actors/actor.txt b/wadsrc/static/actors/actor.txt
index f8dd3d863..b0bb3a3d8 100644
--- a/wadsrc/static/actors/actor.txt
+++ b/wadsrc/static/actors/actor.txt
@@ -32,6 +32,7 @@ ACTOR Actor native //: Thinker
 	native fixed_t ceilingz;
 	native fixed_t floorz;
 	native int health;
+	native int mass;
 	native angle_t pitch;
 	native int special;
 	native int tid;
@@ -207,6 +208,7 @@ ACTOR Actor native //: Thinker
 	action native A_FadeOut(float reduce = 0.1, bool remove = true);
 	action native A_FadeTo(float target, float amount = 0.1, bool remove = false);
 	action native A_SetScale(float scalex, float scaley = 0);
+	action native A_SetMass(int mass);
 	action native A_SpawnDebris(class<Actor> spawntype, bool transfer_translation = false, float mult_h = 1, float mult_v = 1);
 	action native A_CheckSight(state label);
 	action native A_ExtChase(bool usemelee, bool usemissile, bool playactive = true, bool nightmarefast = false);