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/******************************************************************************
* File: ogrdxf_polyline_smooth.h
*
* Project: Interpolation support for smooth POLYLINE and LWPOLYLINE entities.
* Purpose: Definition of classes for OGR .dxf driver.
* Author: TJ Snider, timsn@thtree.com
* Ray Gardener, Daylon Graphics Ltd.
*
******************************************************************************
* Copyright (c) 2010 Daylon Graphics Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#ifndef __OGRDXF_SMOOTH_POLYLINE_H__
#define __OGRDXF_SMOOTH_POLYLINE_H__
#include "ogrsf_frmts.h"
#include "cpl_conv.h"
#include <vector>
#include "assert.h"
#ifndef M_PI
#define M_PI 3.14159265358979323846 /* pi */
#endif
class DXFSmoothPolylineVertex
{
public:
double x, y, z, bulge;
DXFSmoothPolylineVertex()
{
x = y = z = bulge = 0.0;
}
DXFSmoothPolylineVertex(double dfX, double dfY, double dfZ, double dfBulge)
{
this->set(dfX, dfY, dfZ, dfBulge);
}
void set(double dfX, double dfY, double dfZ, double dfBulge)
{
x = dfX;
y = dfY;
z = dfZ;
bulge = dfBulge;
}
void scale(double s)
{
x *= s;
y *= s;
}
double length() const
{
return (sqrt(x*x + y*y));
}
void normalize()
{
const double len = this->length();
assert(len != 0.0);
x /= len;
y /= len;
}
bool shares_2D_pos(const DXFSmoothPolylineVertex& v) const
{
return (x == v.x && y == v.y);
}
};
class DXFSmoothPolyline
{
// A DXF polyline that includes vertex bulge information.
// Call Tesselate() to convert to an OGRGeometry.
// We treat Z as constant over the entire string; this may
// change in the future.
private:
std::vector<DXFSmoothPolylineVertex> m_vertices;
mutable bool m_blinestringstarted;
bool m_bClosed;
int m_dim;
public:
DXFSmoothPolyline()
{
m_bClosed = false;
m_dim = 2;
}
OGRGeometry* Tesselate() const;
size_t size() { return m_vertices.size(); }
void SetSize(int n) { m_vertices.reserve(n); }
void AddPoint(double dfX, double dfY, double dfZ, double dfBulge)
{
m_vertices.push_back(DXFSmoothPolylineVertex(dfX, dfY, dfZ, dfBulge));
}
void Close();
bool IsEmpty() const { return m_vertices.empty(); }
bool HasConstantZ(double&) const;
void setCoordinateDimension(int n) { m_dim = n; }
private:
void EmitArc(const DXFSmoothPolylineVertex&, const DXFSmoothPolylineVertex&,
double radius, double len, double saggita,
OGRLineString*, double dfZ = 0.0) const;
void EmitLine(const DXFSmoothPolylineVertex&, const DXFSmoothPolylineVertex&,
OGRLineString*, bool bConstantZ, double dfZ) const;
};
#endif /* __OGRDXF_SMOOTH_POLYLINE_H__ */
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