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#ifndef CGALRENDERER_H_
#define CGALRENDERER_H_
#include <string>
#include <map>
#include <list>
#include "visitor.h"
#include "nodecache.h"
#include "cgal.h"
#ifdef ENABLE_CGAL
extern CGAL_Nef_polyhedron3 minkowski3(CGAL_Nef_polyhedron3 a, CGAL_Nef_polyhedron3 b);
extern CGAL_Nef_polyhedron2 minkowski2(CGAL_Nef_polyhedron2 a, CGAL_Nef_polyhedron2 b);
#endif
using std::string;
using std::map;
using std::list;
using std::pair;
class CGALRenderer : public Visitor
{
public:
enum CsgOp {UNION, INTERSECTION, DIFFERENCE, MINKOWSKI};
// FIXME: If a cache is not give, we need to fix this ourselves
CGALRenderer(const NodeCache<string> &dumpcache) : root(NULL), dumpcache(dumpcache) {}
virtual ~CGALRenderer() {}
virtual Response visit(const State &state, const AbstractNode &node);
virtual Response visit(const State &state, const AbstractIntersectionNode &node);
virtual Response visit(const State &state, const CsgNode &node);
virtual Response visit(const State &state, const TransformNode &node);
virtual Response visit(const State &state, const AbstractPolyNode &node);
QHash<QString, CGAL_Nef_polyhedron> &getCache() { return this->cache; }
CGAL_Nef_polyhedron renderCGALMesh(const AbstractNode &node);
CGAL_Nef_polyhedron renderCGALMesh(const PolySet &polyset);
// FIXME: Questionable design...
static CGALRenderer *renderer() { return global_renderer; }
static void setRenderer(CGALRenderer *r) { global_renderer = r; }
private:
void addToParent(const State &state, const AbstractNode &node);
bool isCached(const AbstractNode &node) const;
QString mk_cache_id(const AbstractNode &node) const;
void process(CGAL_Nef_polyhedron &target, const CGAL_Nef_polyhedron &src, CGALRenderer::CsgOp op);
void applyToChildren(const AbstractNode &node, CGALRenderer::CsgOp op);
string currindent;
const AbstractNode *root;
typedef list<pair<const AbstractNode *, QString> > ChildList;
map<int, ChildList> visitedchildren;
// FIXME: enforce some maximum cache size (old version had 100K vertices as limit)
QHash<QString, CGAL_Nef_polyhedron> cache;
const NodeCache<string> &dumpcache;
static CGALRenderer *global_renderer;
};
#endif
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