152 lines
2.9 KiB
C++
152 lines
2.9 KiB
C++
/** \file gameengine/Expressions/Operator1Expr.cpp
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* \ingroup expressions
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*/
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// Operator1Expr.cpp: implementation of the COperator1Expr class.
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/*
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* Copyright (c) 1996-2000 Erwin Coumans <coockie@acm.org>
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*
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* Permission to use, copy, modify, distribute and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies and
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* that both that copyright notice and this permission notice appear
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* in supporting documentation. Erwin Coumans makes no
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* representations about the suitability of this software for any
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* purpose. It is provided "as is" without express or implied warranty.
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*
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*/
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#include "Operator1Expr.h"
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#include "EmptyValue.h"
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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COperator1Expr::COperator1Expr()
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/*
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pre:
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effect: constucts an empty COperator1Expr
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*/
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{
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m_lhs = NULL;
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}
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COperator1Expr::COperator1Expr(VALUE_OPERATOR op, CExpression * lhs)
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/*
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pre:
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effect: constucts a COperator1Expr with op and lhs in it
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*/
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{
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m_lhs = lhs;
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m_op = op;
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}
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COperator1Expr::~COperator1Expr()
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/*
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pre:
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effect: deletes the object
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*/
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{
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if (m_lhs) m_lhs->Release();
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}
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CValue * COperator1Expr::Calculate()
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/*
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pre:
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ret: a new object containing the result of applying the operator m_op to the
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value of m_lhs
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*/
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{
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CValue *ret;
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CValue *temp = m_lhs->Calculate();
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CValue* empty = new CEmptyValue();
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ret = empty->Calc(m_op, temp);
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empty->Release();
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temp->Release();
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return ret;
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}
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/*
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bool COperator1Expr::IsInside(float x, float y, float z,bool bBorderInclude)
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{
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bool result = true;
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switch (m_op)
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{
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case VALUE_ADD_OPERATOR:
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{
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if (m_lhs)
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{
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result = result || m_lhs->IsInside(x,y,z,bBorderInclude);
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}
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break;
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}
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case VALUE_SUB_OPERATOR:
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{
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result = true;
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if (m_lhs)
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{
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result = result && (!m_lhs->IsInside(x,y,z,bBorderInclude));
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}
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break;
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}
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}
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return result;
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}
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*/
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bool COperator1Expr::NeedsRecalculated()
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{
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return m_lhs->NeedsRecalculated();
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}
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CExpression* COperator1Expr::CheckLink(std::vector<CBrokenLinkInfo*>& brokenlinks)
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{
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CExpression* newlhs = m_lhs->CheckLink(brokenlinks);
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if (newlhs)
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{
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if (newlhs==m_lhs) {
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// not changed
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} else {
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// changed
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//numchanges++;
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newlhs->AddRef();
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//m_lhs->Release();
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brokenlinks.push_back(new CBrokenLinkInfo(&m_lhs,m_lhs));
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m_lhs = newlhs;
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}
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return this;
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} else {
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//numchanges++;
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AddRef();
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return Release();
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}
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}
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void COperator1Expr::BroadcastOperators(VALUE_OPERATOR op)
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{
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if (m_lhs)
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m_lhs->BroadcastOperators(m_op);
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}
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bool COperator1Expr::MergeExpression(CExpression *otherexpr)
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{
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if (m_lhs)
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return m_lhs->MergeExpression(otherexpr);
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assertd(false); // should not get here, expression is not compatible for merge
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return false;
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}
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