Initial revision

source/gameengine/Expressions/ConstExpr.cpp

@@ -0,0 +1,132 @@
+// ConstExpr.cpp: implementation of the CConstExpr 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 "Value.h" // for precompiled header
+
+#include "ConstExpr.h"
+#include "VectorValue.h"
+
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+CConstExpr::CConstExpr()
+{
+}
+
+
+
+CConstExpr::CConstExpr(CValue* constval) 
+/*
+pre:
+effect: constructs a CConstExpr cointing the value constval
+*/
+{
+	m_value = constval;
+//	m_bModified=true;
+}
+
+
+
+CConstExpr::~CConstExpr()
+/*
+pre:
+effect: deletes the object
+*/
+{
+	if (m_value)
+		m_value->Release();
+}
+
+
+
+unsigned char CConstExpr::GetExpressionID()
+{
+	return CCONSTEXPRESSIONID;
+}
+
+
+
+CValue* CConstExpr::Calculate()
+/*
+pre:
+ret: a new object containing the value of the stored CValue
+*/
+{
+	return m_value->AddRef();
+}
+
+
+
+void CConstExpr::ClearModified()
+{ 
+	if (m_value)
+	{
+		m_value->SetModified(false);
+		m_value->SetAffected(false);
+	}
+}
+
+
+
+float CConstExpr::GetNumber()
+{
+	return -1;
+}
+
+
+
+bool CConstExpr::NeedsRecalculated()
+{
+	return m_value->IsAffected(); // IsAffected is m_bModified OR m_bAffected !!!
+}
+
+
+
+CExpression* CConstExpr::CheckLink(std::vector<CBrokenLinkInfo*>& brokenlinks)
+{
+// parent checks if child is still usefull. 
+// When for example it's value it's deleted flag set
+// then release Value, and return NULL in case of constexpression
+// else return this...
+
+	assertd(m_value);
+	if (m_value->IsReleaseRequested())
+	{
+		AddRef(); //numchanges++;
+		return Release();
+	}
+	else
+		return this;
+}
+
+
+
+void CConstExpr::BroadcastOperators(VALUE_OPERATOR op)
+{
+	assertd(m_value);
+	m_value->SetColorOperator(op);
+}
+
+
+
+bool CConstExpr::MergeExpression(CExpression *otherexpr)
+{
+	assertd(false);
+	return false;
+}