cEntity: Added mass to entities.

git-svn-id: http://mc-server.googlecode.com/svn/trunk@1430 0a769ca7-a7f5-676a-18bf-c427514a06d6

source/Entity.cpp

@@ -33,6 +33,7 @@ cEntity::cEntity(eEntityType a_EntityType, double a_X, double a_Y, double a_Z)
 	, m_HeadYaw( 0.0 )
 	, m_Rot(0.0, 0.0, 0.0)
 	, m_Pos(a_X, a_Y, a_Z)
+	, m_Mass (0.001) //Default 1g
 	, m_bDirtyHead(true)
 	, m_bDirtyOrientation(true)
 	, m_bDirtyPosition(true)
@@ -506,6 +507,25 @@ void cEntity::SetHeadYaw(double a_HeadYaw)
 
 
 
+void cEntity::SetMass(double a_Mass)
+{
+	if (a_Mass > 0)
+	{
+		m_Mass = a_Mass;
+	}
+	else
+	{
+		//Make sure that mass is not zero. 1g is the default because we 
+		//have to choose a number. It's perfectly legal to have a mass 
+		//less than 1g as long as is NOT equal or less than zero.
+		m_Mass = 0.001;
+	}
+}
+
+
+
+
+
 void cEntity::SetRotation(double a_Rotation)
 {
 	m_Rot.x = a_Rotation;