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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.
*
* 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 "csgterm.h"
#include "builtin.h"
#include "printutils.h"
#ifdef ENABLE_CGAL
# include "cgal.h"
#endif
enum csg_type_e {
CSG_TYPE_UNION,
CSG_TYPE_DIFFERENCE,
CSG_TYPE_INTERSECTION
};
class CsgModule : public AbstractModule
{
public:
csg_type_e type;
CsgModule(csg_type_e type) : type(type) { }
virtual AbstractNode *evaluate(const Context *ctx, const ModuleInstantiation *inst) const;
};
class CsgNode : public AbstractNode
{
public:
csg_type_e type;
CsgNode(const ModuleInstantiation *mi, csg_type_e type) : AbstractNode(mi), type(type) { }
#ifdef ENABLE_CGAL
virtual CGAL_Nef_polyhedron render_cgal_nef_polyhedron() const;
#endif
CSGTerm *render_csg_term(double m[20], QVector<CSGTerm*> *highlights, QVector<CSGTerm*> *background) const;
virtual QString dump(QString indent) const;
};
AbstractNode *CsgModule::evaluate(const Context*, const ModuleInstantiation *inst) const
{
CsgNode *node = new CsgNode(inst, type);
foreach (ModuleInstantiation *v, inst->children) {
AbstractNode *n = v->evaluate(inst->ctx);
if (n != NULL)
node->children.append(n);
}
return node;
}
#ifdef ENABLE_CGAL
CGAL_Nef_polyhedron CsgNode::render_cgal_nef_polyhedron() const
{
QString cache_id = mk_cache_id();
if (cgal_nef_cache.contains(cache_id)) {
progress_report();
PRINT(cgal_nef_cache[cache_id]->msg);
return cgal_nef_cache[cache_id]->N;
}
print_messages_push();
bool first = true;
CGAL_Nef_polyhedron N;
foreach (AbstractNode *v, children) {
if (v->modinst->tag_background)
continue;
if (first) {
N = v->render_cgal_nef_polyhedron();
if (N.dim != 0)
first = false;
} else if (N.dim == 2) {
if (type == CSG_TYPE_UNION) {
N.p2 += v->render_cgal_nef_polyhedron().p2;
} else if (type == CSG_TYPE_DIFFERENCE) {
N.p2 -= v->render_cgal_nef_polyhedron().p2;
} else if (type == CSG_TYPE_INTERSECTION) {
N.p2 *= v->render_cgal_nef_polyhedron().p2;
}
} else if (N.dim == 3) {
if (type == CSG_TYPE_UNION) {
N.p3 += v->render_cgal_nef_polyhedron().p3;
} else if (type == CSG_TYPE_DIFFERENCE) {
N.p3 -= v->render_cgal_nef_polyhedron().p3;
} else if (type == CSG_TYPE_INTERSECTION) {
N.p3 *= v->render_cgal_nef_polyhedron().p3;
}
}
}
cgal_nef_cache.insert(cache_id, new cgal_nef_cache_entry(N), N.weight());
print_messages_pop();
progress_report();
return N;
}
#endif /* ENABLE_CGAL */
CSGTerm *CsgNode::render_csg_term(double m[20], QVector<CSGTerm*> *highlights, QVector<CSGTerm*> *background) const
{
CSGTerm *t1 = NULL;
foreach (AbstractNode *v, children) {
CSGTerm *t2 = v->render_csg_term(m, highlights, background);
if (t2 && !t1) {
t1 = t2;
} else if (t2 && t1) {
if (type == CSG_TYPE_UNION) {
t1 = new CSGTerm(CSGTerm::TYPE_UNION, t1, t2);
} else if (type == CSG_TYPE_DIFFERENCE) {
t1 = new CSGTerm(CSGTerm::TYPE_DIFFERENCE, t1, t2);
} else if (type == CSG_TYPE_INTERSECTION) {
t1 = new CSGTerm(CSGTerm::TYPE_INTERSECTION, t1, t2);
}
}
}
if (t1 && modinst->tag_highlight && highlights)
highlights->append(t1->link());
if (t1 && modinst->tag_background && background) {
background->append(t1);
return NULL;
}
return t1;
}
QString CsgNode::dump(QString indent) const
{
if (dump_cache.isEmpty()) {
QString text = indent + QString("n%1: ").arg(idx);
if (type == CSG_TYPE_UNION)
text += "union() {\n";
if (type == CSG_TYPE_DIFFERENCE)
text += "difference() {\n";
if (type == CSG_TYPE_INTERSECTION)
text += "intersection() {\n";
foreach (AbstractNode *v, children)
text += v->dump(indent + QString("\t"));
((AbstractNode*)this)->dump_cache = text + indent + "}\n";
}
return dump_cache;
}
void register_builtin_csgops()
{
builtin_modules["union"] = new CsgModule(CSG_TYPE_UNION);
builtin_modules["difference"] = new CsgModule(CSG_TYPE_DIFFERENCE);
builtin_modules["intersection"] = new CsgModule(CSG_TYPE_INTERSECTION);
}
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