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/*
* OpenSCAD (www.openscad.org)
* Copyright (C) 2009-2011 Clifford Wolf <clifford@clifford.at> and
* Marius Kintel <marius@kintel.net>
*
* 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.
*
* As a special exception, you have permission to link this program
* with the CGAL library and distribute executables, as long as you
* follow the requirements of the GNU GPL in regard to all of the
* software in the executable aside from CGAL.
*
* 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 "module.h"
#include "node.h"
#include "evalcontext.h"
#include "modcontext.h"
#include "builtin.h"
#include "printutils.h"
#include <sstream>
#include "mathc99.h"
enum control_type_e {
CHILD,
ECHO,
ASSIGN,
FOR,
INT_FOR,
IF
};
class ControlModule : public AbstractModule
{
public:
control_type_e type;
ControlModule(control_type_e type) : type(type) { }
virtual AbstractNode *instantiate(const Context *ctx, const ModuleInstantiation *inst, const EvalContext *evalctx) const;
};
void for_eval(AbstractNode &node, const ModuleInstantiation &inst, size_t l,
const Context *ctx, const EvalContext *evalctx)
{
if (evalctx->numArgs() > l) {
const std::string &it_name = evalctx->getArgName(l);
const Value &it_values = evalctx->getArgValue(l, ctx);
Context c(ctx);
if (it_values.type() == Value::RANGE) {
Value::RangeType range = it_values.toRange();
if (range.end < range.begin) {
double t = range.begin;
range.begin = range.end;
range.end = t;
}
if (range.step > 0 && (range.begin-range.end)/range.step < 10000) {
for (double i = range.begin; i <= range.end; i += range.step) {
c.set_variable(it_name, Value(i));
for_eval(node, inst, l+1, &c, evalctx);
}
}
}
else if (it_values.type() == Value::VECTOR) {
for (size_t i = 0; i < it_values.toVector().size(); i++) {
c.set_variable(it_name, it_values.toVector()[i]);
for_eval(node, inst, l+1, &c, evalctx);
}
}
else if (it_values.type() != Value::UNDEFINED) {
c.set_variable(it_name, it_values);
for_eval(node, inst, l+1, &c, evalctx);
}
} else if (l > 0) {
std::vector<AbstractNode *> instantiatednodes = inst.instantiateChildren(ctx);
node.children.insert(node.children.end(), instantiatednodes.begin(), instantiatednodes.end());
}
}
AbstractNode *ControlModule::instantiate(const Context *ctx, const ModuleInstantiation *inst, const EvalContext *evalctx) const
{
AbstractNode *node = NULL;
if (type == CHILD)
{
int n = 0;
if (evalctx->numArgs() > 0) {
double v;
if (evalctx->getArgValue(0).getDouble(v)) {
n = trunc(v);
if (n < 0) {
PRINTB("WARNING: Negative child index (%d) not allowed", n);
return NULL; // Disallow negative child indices
}
}
}
// Find the last custom module invocation, which will contain
// an eval context with the children of the module invokation
const Context *tmpc = evalctx;
while (tmpc->parent) {
const ModuleContext *filectx = dynamic_cast<const ModuleContext*>(tmpc->parent);
if (filectx) {
// This will trigger if trying to invoke child from the root of any file
// assert(filectx->evalctx);
if (filectx->evalctx) {
if (n < (int)filectx->evalctx->numChildren()) {
node = filectx->evalctx->getChild(n)->evaluate(filectx->evalctx);
}
else {
// How to deal with negative objects in this case?
// (e.g. first child of difference is invalid)
PRINTB("WARNING: Child index (%d) out of bounds (%d children)",
n % filectx->evalctx->numChildren());
}
}
return node;
}
tmpc = tmpc->parent;
}
return node;
}
if (type == INT_FOR)
node = new AbstractIntersectionNode(inst);
else
node = new AbstractNode(inst);
if (type == ECHO)
{
std::stringstream msg;
msg << "ECHO: ";
for (size_t i = 0; i < inst->arguments.size(); i++) {
if (i > 0) msg << ", ";
if (!evalctx->getArgName(i).empty()) msg << evalctx->getArgName(i) << " = ";
msg << evalctx->getArgValue(i);
}
PRINTB("%s", msg.str());
}
if (type == ASSIGN)
{
Context c(evalctx);
for (size_t i = 0; i < evalctx->numArgs(); i++) {
if (!evalctx->getArgName(i).empty())
c.set_variable(evalctx->getArgName(i), evalctx->getArgValue(i));
}
std::vector<AbstractNode *> instantiatednodes = inst->instantiateChildren(&c);
node->children.insert(node->children.end(), instantiatednodes.begin(), instantiatednodes.end());
}
if (type == FOR || type == INT_FOR)
{
for_eval(*node, *inst, 0, evalctx, evalctx);
}
if (type == IF)
{
const IfElseModuleInstantiation *ifelse = dynamic_cast<const IfElseModuleInstantiation*>(inst);
if (evalctx->numArgs() > 0 && evalctx->getArgValue(0).toBool()) {
std::vector<AbstractNode *> instantiatednodes = ifelse->instantiateChildren(evalctx);
node->children.insert(node->children.end(), instantiatednodes.begin(), instantiatednodes.end());
}
else {
std::vector<AbstractNode *> instantiatednodes = ifelse->instantiateElseChildren(evalctx);
node->children.insert(node->children.end(), instantiatednodes.begin(), instantiatednodes.end());
}
}
return node;
}
void register_builtin_control()
{
Builtins::init("child", new ControlModule(CHILD));
Builtins::init("echo", new ControlModule(ECHO));
Builtins::init("assign", new ControlModule(ASSIGN));
Builtins::init("for", new ControlModule(FOR));
Builtins::init("intersection_for", new ControlModule(INT_FOR));
Builtins::init("if", new ControlModule(IF));
}
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