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/*
SPDX-FileCopyrightText: 2007 James B. Bowlin <bowlin@mindspring.com>
SPDX-License-Identifier: BSD-3-Clause AND GPL-2.0-or-later
*/
#ifndef MESH_BUFFER_H
#define MESH_BUFFER_H
#include "typedef.h"
class HTMesh;
/** @class MeshBuffer
* The sole purpose of a MeshBuffer is to hold storage space
* for the results of an HTM inetersection and then allow multiple
* MeshIterator's to walk through the result set. The buffer space is allocated
* when the MeshBuffer is created. Mesh buffers will usually hang around for
* the life of an HTMesh. Each mesh buffer is re-usable. Simply reset() it and
* then fill it by append()'ing trixels. A MeshIterator grabs the size() and
* the buffer() so it can iterate over the results.
*/
class MeshBuffer
{
public:
MeshBuffer(HTMesh *mesh);
~MeshBuffer();
/** @short prepare the buffer for a new result set
*/
void reset() { m_size = m_error = 0; }
/** @short add trixels to the buffer
*/
int append(Trixel trixel);
/** @short the location of the buffer for reading
*/
const Trixel *buffer() const { return m_buffer; }
/** @short the number of trixels in the result set
*/
int size() const { return m_size; }
/** @short returns the number of trixels that would have overflowed the
* buffer.
*/
int error() const { return m_error; }
/** @short fills the buffer with consecutive integers
*/
void fill();
private:
Trixel *m_buffer;
int m_size;
int maxSize;
int m_error;
};
#endif
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