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space-builder.h
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space-builder.h
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// space-builder.h -- Builder for Space objects
//
// Copyright (C) 2007, 2009, 2011 Miles Bader <miles@gnu.org>
//
// This source code 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 3, or (at
// your option) any later version. See the file COPYING for more details.
//
// Written by Miles Bader <miles@gnu.org>
//
#ifndef SNOGRAY_SPACE_BUILDER_H
#define SNOGRAY_SPACE_BUILDER_H
#include <vector>
namespace snogray {
class Space;
class Surface;
// A class used for building a Space object.
//
class SpaceBuilder
{
public:
virtual ~SpaceBuilder() { }
// Add SURFACE to the space being built.
//
virtual void add (const Surface *surface) = 0;
// Return a space containing the objects added through this builder.
//
// Note that this can only be done once; after calling this method, the
// builder should be considered "used" (for instance, it may have
// transfered some resources to the space object), and the only valid
// operation on it is to destroy it.
//
virtual const Space *make_space () = 0;
};
// This class makes a SpaceBuilder object.
//
class SpaceBuilderFactory
{
public:
virtual ~SpaceBuilderFactory () { }
// Return a new SpaceBuilder object.
//
virtual SpaceBuilder *make_space_builder () const = 0;
};
}
#endif // SNOGRAY_SPACE_BUILDER_H