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/*
* OpenSCAD (www.openscad.at)
* Copyright (C) 2009 Clifford Wolf <clifford@clifford.at>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "openscad.h"
Expression::Expression()
{
type = 0;
}
Expression::~Expression()
{
for (int i=0; i < children.size(); i++)
delete children[i];
}
Value Expression::evaluate(const Context *context) const
{
switch (type)
{
case '*':
return children[0]->evaluate(context) * children[1]->evaluate(context);
case '/':
return children[0]->evaluate(context) / children[1]->evaluate(context);
case '%':
return children[0]->evaluate(context) % children[1]->evaluate(context);
case '+':
return children[0]->evaluate(context) + children[1]->evaluate(context);
case '-':
return children[0]->evaluate(context) - children[1]->evaluate(context);
case 'I':
return children[0]->evaluate(context).inv();
case 'C':
return const_value;
case 'V':
return Value(children[0]->evaluate(context), children[1]->evaluate(context), children[2]->evaluate(context));
case 'L':
return context->lookup_variable(var_name);
case 'M':
{
Value v = children[0]->evaluate(context);
if (v.is_nan || !v.is_vector)
return Value();
if (var_name == QString("x"))
return Value(v.x);
if (var_name == QString("y"))
return Value(v.y);
if (var_name == QString("z"))
return Value(v.z);
return Value();
}
case 'F':
{
QVector<Value> argvalues;
for (int i=0; i < children.size(); i++)
argvalues.append(children[i]->evaluate(context));
return context->evaluate_function(call_funcname, call_argnames, argvalues);
}
default:
abort();
}
}
QString Expression::dump() const
{
switch (type)
{
case '*':
case '/':
case '%':
case '+':
case '-':
return QString("(%1%2%3)").arg(children[0]->dump(), QString(type), children[1]->dump());
case 'I':
return QString("(-%1)").arg(children[0]->dump());
case 'C':
return const_value.dump();
case 'V':
return QString("[%1, %2, %3]").arg(children[0]->dump(), children[1]->dump(), children[2]->dump());
case 'L':
return var_name;
case 'M':
return QString("(%1.%2)").arg(children[0]->dump(), var_name);
case 'F':
{
QString text = call_funcname + QString("(");
for (int i=0; i < children.size(); i++) {
if (i > 0)
text += QString(", ");
if (!call_argnames[i].isEmpty())
text += call_argnames[i] + QString(" = ");
text += children[i]->dump();
}
return text + QString(")");
}
default:
abort();
}
}
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