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[WIP] [Feature] Plotly extension #693

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1e04263
[ext][io] Add a basic implementation
sudo-panda Apr 5, 2020
48ea5f1
[doc][ext][io] Add an example to generate json
sudo-panda Apr 5, 2020
8a729d0
[ext][plotly] Add support for
sudo-panda Apr 10, 2020
0979b75
[doc][ext][plotly] Modify example to provide color
sudo-panda Apr 10, 2020
e533114
[ext][io]Add color class and support for polygon
sudo-panda Apr 24, 2020
a7ce2af
[doc][ext][io] Change ex to check prev commit
sudo-panda Apr 24, 2020
99c8e84
[ext][io][plotly] add support for geographic tag
sudo-panda May 11, 2020
8560b71
[doc][ext][io] example for geographic tag
sudo-panda May 11, 2020
2230068
[ext][io][plotly] minor bug fix
sudo-panda May 11, 2020
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13 changes: 13 additions & 0 deletions extensions/example/io/Jamfile
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# Boost.Geometry (aka GGL, Generic Geometry Library)
#
# Copyright (c) 2020 Baidyanath Kundu, Haldia, India.

# Use, modification and distribution is subject to the Boost Software License,
# Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)

project boost-geometry-extensions-io
: #requirements
;

exe plotly_example : plotly_example.cpp ;
31 changes: 31 additions & 0 deletions extensions/example/io/plotly_example.cpp
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// Boost.Geometry (aka GGL, Generic Geometry Library)
// QuickBook Example

// Copyright (c) 2013 Barend Gehrels, Amsterdam, the Netherlands.

// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#include <iostream>
#include <fstream>
#include <boost/geometry.hpp>
#include <boost/geometry/extensions/io/plotly/plotter.hpp>
#include <boost/geometry/geometries/point_xyz.hpp>

int main()
{
typedef boost::geometry::model::d3::point_xyz<double> point_t;

boost::geometry::model::linestring<point_t> a;

boost::geometry::append(a, point_t(0, 0, 0));
boost::geometry::append(a, point_t(0, 1, 2));
boost::geometry::append(a, point_t(1, 2, 3));

std::ofstream json("my_plot.json");
boost::geometry::json_plotter plotter(json);
plotter.plot(a, "rgb(5, 200, 64)");

return 0;
}
242 changes: 242 additions & 0 deletions include/boost/geometry/extensions/io/plotly/plotter.hpp
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// Boost.Geometry (aka GGL, Generic Geometry Library)

// Copyright (c) 2020 Baidyanath Kundu, Haldia, India.

// Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
// (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.

// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)

#ifndef BOOST_GEOMETRY_EXTENSIONS_IO_PLOT_LY_PLOTTER_HPP
#define BOOST_GEOMETRY_EXTENSIONS_IO_PLOT_LY_PLOTTER_HPP

#include <ostream>

#include <boost/geometry/geometries/geometries.hpp>

namespace boost { namespace geometry
{

#ifndef DOXYGEN_NO_DETAIL
namespace detail { namespace json
{

template <typename Point, int Dimension>
struct json_point
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
Point const& p, std::string const& color)
{
os << "{ \"mode\": \"lines\", \"type\": \""
<< (( Dimension > 2 ) ? "scatter3d" : "scatter" )
<< "\""
<< ", \"x\": [\"" << geometry::get<0>(p) << "\"]"
<< ", \"y\": [\"" << geometry::get<1>(p) << "\"]"
<< (( Dimension > 2 ) ? (", \"z\": [\"" << geometry::get<2>(p) << "\"]") : "" )
<< ", \"marker\": {\"color\": \"" << color << "\"}}";
}
};

template <typename Segment, int Dimension>
struct json_segment
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
Segment const& segment, std::string const& color)
{
os << "{ \"mode\": \"lines\", \"type\": \""
<< (( Dimension > 2 ) ? "scatter3d" : "scatter" )
<< "\""
<< ", \"x\": [\"" << geometry::get<0, 0>(segment) << "\", \"" << geometry::get<1, 0>(segment) <<"\"]"
<< ", \"y\": [\"" << geometry::get<0, 1>(segment) << "\", \"" << geometry::get<1, 1>(segment) <<"\"]";
if( Dimension == 3 )
{
os << ", \"z\": [\"" << geometry::get<0, 2>(segment) << "\", \"" << geometry::get<1, 2>(segment) << "\"]";
}
os << ", \"line\": {\"dash\": \"solid\", \"color\": \"" << color << "\", \"width\": 2}";
}
};

template <typename Range, int Dimension>
struct json_range
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
Range const& range, std::string const& color)
{
typedef typename boost::range_iterator<Range const>::type iterator;

bool first = true;

os << "{ \"mode\": \"lines\", \"type\": \""
<< (( Dimension > 2 ) ? "scatter3d" : "scatter" )
<< "\"";

std::basic_stringstream<Char, Traits> x, y, z;

x << ", \"x\": [";
y << ", \"y\": [";
z << ( Dimension > 2 ? ", \"z\": [" : "" );

for (iterator it = boost::begin(range);
it != boost::end(range);
++it, first = false)
{
x << (first ? "\"" : ", \"" )
<< geometry::get<0>(*it)
<< "\"";
y << (first ? "\"" : ", \"" )
<< geometry::get<1>(*it)
<< "\"";
if( Dimension > 2 )
{
z << (first ? "\"" : ", \"" )
<< geometry::get<2>(*it)
<< "\"";
}
}

x << "]";
y << "]";
z << ( Dimension > 2 ? "]" : "" );

os << x.rdbuf()
<< y.rdbuf()
<< z.rdbuf()
<< ", \"line\": {\"dash\": \"solid\", \"color\": \"" << color << "\", \"width\": 2}";
}
};


template <typename MultiGeometry, typename Policy>
struct json_multi
{
template <typename Char, typename Traits>
static inline void apply(std::basic_ostream<Char, Traits>& os,
MultiGeometry const& multi, std::string const& color)
{
for (typename boost::range_iterator<MultiGeometry const>::type
it = boost::begin(multi);
it != boost::end(multi);
++it)
{
Policy::apply(os, *it, color);
}

}

};

}} // namespace detail::json
#endif // DOXYGEN_NO_DETAIL

#ifndef DOXYGEN_NO_DISPATCH
namespace dispatch
{

template
<
typename Geometry,
typename Tag = typename tag<Geometry>::type
>
struct json_plot
{
BOOST_MPL_ASSERT_MSG
(
false, NOT_OR_NOT_YET_IMPLEMENTED_FOR_THIS_GEOMETRY_TYPE
, (Geometry)
);
};

template <typename Point>
struct json_plot<Point, point_tag> : detail::json::json_point<Point, dimension<Point>::value> {};

template <typename Segment>
struct json_plot<Segment, segment_tag> : detail::json::json_segment<Segment, dimension<Segment>::value> {};

template <typename Linestring>
struct json_plot<Linestring, linestring_tag>
: detail::json::json_range<Linestring, dimension<Linestring>::value> {};

template <typename MultiPoint>
struct json_plot<MultiPoint, multi_point_tag>
: detail::json::json_multi
<
MultiPoint,
detail::json::json_point
<
typename boost::range_value<MultiPoint>::type,
dimension<MultiPoint>::value
>
>
{};

template <typename MultiLinestring>
struct json_plot<MultiLinestring, multi_linestring_tag>
: detail::json::json_multi
<
MultiLinestring,
detail::json::json_range
<
typename boost::range_value<MultiLinestring>::type,
dimension<MultiLinestring>::value
>

>
{};

} // namespace dispatch
#endif // DOXYGEN_NO_DISPATCH

template <typename Geometry>
inline void json_plot(std::ostream& stream, Geometry const& geometry, std::string const& color)
{
dispatch::json_plot<Geometry>::apply(stream, geometry, color);
}


class json_plotter : boost::noncopyable
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{
std::ostream& m_stream;
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@awulkiew awulkiew Apr 20, 2020

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Ok, so the stream has to live outside this class. It is like in svg_mapper so I understand that you replicated the existing design. This is error-prone since when the object outside is destroyed then this is a dangling reference.

So I'm wondering about a different design, i.e. owning the stream instead of the reference. E.g.:

template <typename Stream>
class plotly_plotter
{
public:
    template <typename ...Ts>
    plotly_stream(Ts &&... params)
        : m_stream(std::forward<Ts>(params)...)
    {}
private:
    Stream m_stream;
};

What do you think? Do you have different ideas?

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@sudo-panda sudo-panda Apr 21, 2020 •
edited
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Yeah that seems better. I was thinking why the above design was implemented in svg_mapper. The only reason I could find is if some external changes are required by the user that isn't supported by svg_mapper. This isn't required by plotly_plotter at all then. Can you tell me that actual reason for this design?

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@awulkiew awulkiew Apr 21, 2020

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Can you tell me that actual reason for this design?

I don't really know I have only a few ideas though. @barendgehrels do you remember why exactly does the svg_mapper store the reference to the stream instead of owning it?

Back then perfect forwarding was impossible. The code in my previous comment requires C++11 but Boost.Geometry right now requires C++03 (this will change soon). And various streams can have various interfaces, e.g. no open() member function so there must be a way of passing parameters into its constructor.

In some cases the stream objects are already created, e.g. std::cout, std::cerr, etc. AFAIU it is possible to account for that by creating a std::ostream from another stream's streambuf:

plotly_plotter<std::ostream> plotter(std::cout.rdbuf());

But this would be more confusing than simply calling:

plotly_plotter plotter(std::cout);

With non-owning relationship the same stream can be shared by several mappers/plotters. I don't know if that makes sense but it is possible nevertheless.

The user can keep and e.g. close and reopen ofstream buffer instead of creating the svg_mapper/plotly_plotter object each time.

The only reason I could find is if some external changes

Right, though the owned stream could be exposed with some getter function if needed.

Btw, I'm not saying that you should start implementing what I have proposed above. I'm only brainstorming. E.g. now after listing the potential reasons above I'm not sure whether or not my proposal was good.

On the other hand maybe passing a reference as a template parameter could work with the design I proposed. So the user would be able to do both things, store a stream object or a reference. Unless there are some issues I'm not taking into account.

plotly_plotter<std::ostream &> plotter(std::cout);

And last but not least I'm not sure if the design should be different than svg_mapper because the users may expect that the tools work the same and either expect that a reference is stored in plotly_plotter or that an object is stored in svg_mapper. We should probably be consistent one way or another.

@mloskot do you have some thoughts about it?

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For now I have put it inside the class itself as I think it's better to make it safe than just copy the existing design as:

  1. It is an extension so the design need not be matched with integral parts of Boost Geometry.
  2. I see no possible requirement for keeping it outside other than the one mentioned above as we are going to shift to C++11 soon.

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Although I can't remember exactly, I think @awulkiew has figured it out right.
It was to allow user to plug in a stream object of their choice, and with simple interface.

bool first;

public:

json_plotter(std::ostream& stream)
: m_stream(stream)
{
m_stream << "{"
<< std::endl
<< " data: [";
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first = true;
}

virtual ~json_plotter()
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{
m_stream << "}], "
<< std::endl
<< " layout: {\"scene\": {\"camera\": {\"up\": {\"x\": 0, \"y\": 0, \"z\": 1}, \"eye\": {\"x\": 0.2829440102575065, \"y\": 0.05402592432697305, \"z\": 2.14581543627592}, \"center\": {\"x\": 0, \"y\": 0, \"z\": 0}, \"projection\": {\"type\": \"perspective\"}}, \"aspectmode\": \"auto\", \"aspectratio\": {\"x\": 1, \"y\": 1, \"z\": 1}}, \"xaxis\": {\"range\": [-1, 6], \"autorange\": true}, \"yaxis\": {\"range\": [-1, 4], \"autorange\": true}, \"autosize\": true, \"template\": {\"data\": {\"bar\": [{\"type\": \"bar\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"table\": [{\"type\": \"table\", \"cells\": {\"fill\": {\"color\": \"#EBF0F8\"}, \"line\": {\"color\": \"white\"}}, \"header\": {\"fill\": {\"color\": \"#C8D4E3\"}, \"line\": {\"color\": \"white\"}}}], \"carpet\": [{\"type\": \"carpet\", \"aaxis\": {\"gridcolor\": \"#C8D4E3\", \"linecolor\": \"#C8D4E3\", \"endlinecolor\": \"#2a3f5f\", \"minorgridcolor\": \"#C8D4E3\", \"startlinecolor\": \"#2a3f5f\"}, \"baxis\": {\"gridcolor\": \"#C8D4E3\", \"linecolor\": \"#C8D4E3\", \"endlinecolor\": \"#2a3f5f\", \"minorgridcolor\": \"#C8D4E3\", \"startlinecolor\": \"#2a3f5f\"}}], \"mesh3d\": [{\"type\": \"mesh3d\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}], \"contour\": [{\"type\": \"contour\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}, \"autocolorscale\": true}], \"heatmap\": [{\"type\": \"heatmap\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}, \"autocolorscale\": true}], \"scatter\": [{\"type\": \"scatter\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"surface\": [{\"type\": \"surface\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}], \"heatmapgl\": [{\"type\": \"heatmapgl\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}], \"histogram\": [{\"type\": \"histogram\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"parcoords\": [{\"line\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}, \"type\": \"parcoords\"}], \"scatter3d\": [{\"type\": \"scatter3d\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"scattergl\": [{\"type\": \"scattergl\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"choropleth\": [{\"type\": \"choropleth\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}], \"scattergeo\": [{\"type\": \"scattergeo\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"histogram2d\": [{\"type\": \"histogram2d\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}, \"autocolorscale\": true}], \"scatterpolar\": [{\"type\": \"scatterpolar\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"contourcarpet\": [{\"type\": \"contourcarpet\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}], \"scattercarpet\": [{\"type\": \"scattercarpet\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"scattermapbox\": [{\"type\": \"scattermapbox\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"scatterpolargl\": [{\"type\": \"scatterpolargl\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"scatterternary\": [{\"type\": \"scatterternary\", \"marker\": {\"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}}}], \"histogram2dcontour\": [{\"type\": \"histogram2dcontour\", \"colorbar\": {\"ticks\": \"\", \"outlinewidth\": 0}, \"autocolorscale\": true}]}, \"layout\": {\"geo\": {\"bgcolor\": \"white\", \"showland\": true, \"lakecolor\": \"white\", \"landcolor\": \"white\", \"showlakes\": true, \"subunitcolor\": \"#C8D4E3\"}, \"font\": {\"color\": \"#2a3f5f\"}, \"polar\": {\"bgcolor\": \"white\", \"radialaxis\": {\"ticks\": \"\", \"gridcolor\": \"#EBF0F8\", \"linecolor\": \"#EBF0F8\"}, \"angularaxis\": {\"ticks\": \"\", \"gridcolor\": \"#EBF0F8\", \"linecolor\": \"#EBF0F8\"}}, \"scene\": {\"xaxis\": {\"ticks\": \"\", \"gridcolor\": \"#DFE8F3\", \"gridwidth\": 2, \"linecolor\": \"#EBF0F8\", \"zerolinecolor\": \"#EBF0F8\", \"showbackground\": true, \"backgroundcolor\": \"white\"}, \"yaxis\": {\"ticks\": \"\", \"gridcolor\": \"#DFE8F3\", \"gridwidth\": 2, \"linecolor\": \"#EBF0F8\", \"zerolinecolor\": \"#EBF0F8\", \"showbackground\": true, \"backgroundcolor\": \"white\"}, \"zaxis\": {\"ticks\": \"\", \"gridcolor\": \"#DFE8F3\", \"gridwidth\": 2, \"linecolor\": \"#EBF0F8\", \"zerolinecolor\": \"#EBF0F8\", \"showbackground\": true, \"backgroundcolor\": \"white\"}}, \"title\": {\"x\": 0.05}, \"xaxis\": {\"ticks\": \"\", \"gridcolor\": \"#EBF0F8\", \"linecolor\": \"#EBF0F8\", \"automargin\": true, \"zerolinecolor\": \"#EBF0F8\", \"zerolinewidth\": 2}, \"yaxis\": {\"ticks\": \"\", \"gridcolor\": \"#EBF0F8\", \"linecolor\": \"#EBF0F8\", \"automargin\": true, \"zerolinecolor\": \"#EBF0F8\", \"zerolinewidth\": 2}, \"ternary\": {\"aaxis\": {\"ticks\": \"\", \"gridcolor\": \"#DFE8F3\", \"linecolor\": \"#A2B1C6\"}, \"baxis\": {\"ticks\": \"\", \"gridcolor\": \"#DFE8F3\", \"linecolor\": \"#A2B1C6\"}, \"caxis\": {\"ticks\": \"\", \"gridcolor\": \"#DFE8F3\", \"linecolor\": \"#A2B1C6\"}, \"bgcolor\": \"white\"}, \"colorway\": [\"#636efa\", \"#EF553B\", \"#00cc96\", \"#ab63fa\", \"#19d3f3\", \"#e763fa\", \"#fecb52\", \"#ffa15a\", \"#ff6692\", \"#b6e880\"], \"hovermode\": \"closest\", \"colorscale\": {\"diverging\": [[0, \"#8e0152\"], [0.1, \"#c51b7d\"], [0.2, \"#de77ae\"], [0.3, \"#f1b6da\"], [0.4, \"#fde0ef\"], [0.5, \"#f7f7f7\"], [0.6, \"#e6f5d0\"], [0.7, \"#b8e186\"], [0.8, \"#7fbc41\"], [0.9, \"#4d9221\"], [1, \"#276419\"]], \"sequential\": [[0, \"#0508b8\"], [0.0893854748603352, \"#1910d8\"], [0.1787709497206704, \"#3c19f0\"], [0.2681564245810056, \"#6b1cfb\"], [0.3575418994413408, \"#981cfd\"], [0.44692737430167595, \"#bf1cfd\"], [0.5363128491620112, \"#dd2bfd\"], [0.6256983240223464, \"#f246fe\"], [0.7150837988826816, \"#fc67fd\"], [0.8044692737430168, \"#fe88fc\"], [0.8938547486033519, \"#fea5fd\"], [0.9832402234636871, \"#febefe\"], [1, \"#fec3fe\"]], \"sequentialminus\": [[0, \"#0508b8\"], [0.0893854748603352, \"#1910d8\"], [0.1787709497206704, \"#3c19f0\"], [0.2681564245810056, \"#6b1cfb\"], [0.3575418994413408, \"#981cfd\"], [0.44692737430167595, \"#bf1cfd\"], [0.5363128491620112, \"#dd2bfd\"], [0.6256983240223464, \"#f246fe\"], [0.7150837988826816, \"#fc67fd\"], [0.8044692737430168, \"#fe88fc\"], [0.8938547486033519, \"#fea5fd\"], [0.9832402234636871, \"#febefe\"], [1, \"#fec3fe\"]]}, \"plot_bgcolor\": \"white\", \"paper_bgcolor\": \"white\", \"shapedefaults\": {\"line\": {\"width\": 0}, \"opacity\": 0.4, \"fillcolor\": \"#506784\"}, \"annotationdefaults\": {\"arrowhead\": 0, \"arrowcolor\": \"#506784\", \"arrowwidth\": 1}}, \"themeRef\": \"PLOTLY_WHITE\"}},"
<< std::endl
<< " frames: [], "
<< std::endl
<< " config: {\"showLink\": true, \"linkText\": \"Export to plotly.com\", \"mapboxAccessToken\": \"pk.eyJ1IjoiY2hyaWRkeXAiLCJhIjoiY2lxMnVvdm5iMDA4dnhsbTQ5aHJzcGs0MyJ9.X9o_rzNLNesDxdra4neC_A\"}"
<< std::endl
<< "}";
}

template <typename Geometry>
void plot(Geometry const& geometry, std::string const& color)
{
m_stream << ( first ? "" : ", " );
first = false;
json_plot(m_stream, geometry, color);
}
};

}} // namespace boost::geometry


#endif // BOOST_GEOMETRY_EXTENSIONS_IO_PLOT_LY_PLOTTER_HPP