Initial revision

source/gameengine/Expressions/EmptyValue.cpp

@@ -0,0 +1,127 @@
+
+// EmptyValue.cpp: implementation of the CEmptyValue class.
+/*
+ * Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
+ *
+ * Permission to use, copy, modify, distribute and sell this software
+ * and its documentation for any purpose is hereby granted without fee,
+ * provided that the above copyright notice appear in all copies and
+ * that both that copyright notice and this permission notice appear
+ * in supporting documentation.  Erwin Coumans makes no
+ * representations about the suitability of this software for any
+ * purpose.  It is provided "as is" without express or implied warranty.
+ *
+ */
+
+
+
+
+#include "EmptyValue.h"
+#include "IntValue.h"
+#include "FloatValue.h"
+#include "StringValue.h"
+#include "ErrorValue.h"
+#include "ListValue.h"
+#include "VoidValue.h"
+
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+CEmptyValue::CEmptyValue()
+/*
+pre:
+effect: constructs a new CEmptyValue
+*/
+{
+	SetModified(false);
+}
+
+
+
+CEmptyValue::~CEmptyValue()
+/*
+pre:
+effect: deletes the object
+*/
+{
+
+}
+
+
+
+CValue * CEmptyValue::Calc(VALUE_OPERATOR op, CValue * val)
+/*
+pre:
+ret: a new object containing the result of applying operator op to this
+object and val
+*/
+{
+	return val->CalcFinal(VALUE_EMPTY_TYPE, op, this);
+	
+}
+
+
+
+CValue * CEmptyValue::CalcFinal(VALUE_DATA_TYPE dtype, VALUE_OPERATOR op, CValue * val)
+/*
+pre: the type of val is dtype
+ret: a new object containing the result of applying operator op to val and
+this object
+*/
+{
+	return val->AddRef();
+}
+
+
+
+float CEmptyValue::GetNumber()
+{
+	return 0;
+}
+
+
+
+CListValue* CEmptyValue::GetPolySoup()
+{
+	CListValue* soup = new CListValue();
+	//don't add any poly, while it's an empty value
+	return soup;
+}
+
+
+
+bool CEmptyValue::IsInside(CValue* testpoint,bool bBorderInclude)
+{
+	// empty space is solid, so always inside
+	return true;
+}
+
+
+
+double*	CEmptyValue::GetVector3(bool bGetTransformedVec)
+{ 
+	assertd(false); // don't get vector from me
+	return ZeroVector();
+}
+
+
+
+static STR_String emptyString = STR_String("");
+
+
+const STR_String & CEmptyValue::GetText()
+{
+	return emptyString;
+}
+
+
+
+CValue* CEmptyValue::GetReplica()
+{ 
+	CEmptyValue* replica = new CEmptyValue(*this);
+	CValue::AddDataToReplica(replica);
+	return replica;
+}
+