graphics-radar.h

/*
 
MIT License
 
Copyright (c) 2017 FMI Open Development / Markus Peura, first.last@fmi.fi
 
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.
 
*/
/*
Part of Rack development has been done in the BALTRAD projects part-financed
by the European Union (European Regional Development Fund and European
Neighbourhood Partnership Instrument, Baltic Sea Region Programme 2007-2013)
*/
 
 
#ifndef RACK_GRAPHICS_RADAR
#define RACK_GRAPHICS_RADAR
 
 
//#include "resources-image.h"
//#include "resources.h"
 
#include <drain/image/GeoFrame.h>
#include <drain/image/TreeElemUtilsSVG.h>
 
#include "radar/Composite.h"
#include "radar/RadarProj.h"
 
 
namespace rack {
 
 
class RadarSVG {
public:
 
 
    inline
    RadarSVG(int radialBezierResolution = 8){
        setRadialResolution(radialBezierResolution);
    };
 
    inline
    RadarSVG(const RadarSVG & radarSvg){
        setRadialResolution(radialBezierResolution);
    };
 
 
 
    enum StyleClasses {
        VECTOR_OVERLAY, // this is more for group ID/name
        HIGHLIGHT,      // CSS: activated on tool tip
        // ^ rename VECTORS  VECTOR_GRAPHICS
        GRID,           // CSS
    };
 
 
    static
    drain::image::TreeSVG & getOverlayStyle(drain::image::TreeSVG & svgDoc);
 
 
    static
    drain::image::TreeSVG & getOverlayGroup(drain::image::TreeSVG & svgDoc);
 
 
    // Projection of the latest radar input.
    RadarProj radarProj;
 
    // Maximum range of the latest radar input.
    int maxRange = 0; // metres
 
    drain::image::GeoFrame geoFrame;
 
 
    void updateRadarConf(const drain::VariableMap & where);
 
 
    // template <class T>
    // void updateCartesianConf(const drain::SmartMap<T> & where);
    void updateCartesianConf(const drain::VariableMap & where);
 
    void updateCartesianConf(const Composite & comp);
 
    inline
    void setRadialResolution(int n){
        getCubicBezierConf(conf, n);
        radialBezierResolution = n;
    }
 
    /*
    void getCubicCoeff(int n, double & radialCoeff, double & angularOffset) const {
        double theta = 2.0*M_PI / static_cast<double>(n);
        double k = 4.0/3.0 * ::tan(theta/4.0);
        radialCoeff = sqrt(1.0 + k*k);
        angularOffset = ::atan(k);
    }
    */
 
    struct CubicBezierConf {
        // int sectorCount;
        double delta = 0.0;
        double radialCoeff = 1.0;
        double angularOffset = 0.0;
    };
 
    CubicBezierConf conf;
 
    /***
     *   \param n -sectors
     */
    inline
    void getCubicBezierConf(CubicBezierConf & conf, int n) const {
        getCubicBezierConf(conf, 0.0, 2.0*M_PI / static_cast<double>(n));
    }
 
    void getCubicBezierConf(CubicBezierConf & conf, double angleStartR, double angleEndR) const;
 
    // typedef DRAIN_SVG_ELEM_CLS(PATH) svgPath;
    inline
    void convert(double radius, double azimuth, drain::Point2D<int> & imgPoint) const {
        drain::Point2D<double> geoPoint;
        polarToMeters(radius, azimuth, geoPoint);
        // radarProj.projectFwd(radius*::sin(azimuth), radius*::cos(azimuth), geoPoint.x, geoPoint.y);
        geoFrame.m2pix(geoPoint, imgPoint);
    };
 
    inline
    void polarToMeters(double radius, double azimuth, drain::Point2D<double> & geoPoint) const {
        radarProj.projectFwd(radius*::sin(azimuth), radius*::cos(azimuth), geoPoint.x, geoPoint.y);
        //geoFrame.m2pix(geoPoint, imgPoint);
    };
 
    inline
    void radarGeoToCompositeImage(drain::Point2D<double> & radarPoint, drain::Point2D<int> & imagePoint) const {
        drain::Point2D<double> compositePoint;
        radarProj.projectFwd(radarPoint, compositePoint);
        geoFrame.m2pix(compositePoint, imagePoint);
    }
 
 
 
    inline
    void moveTo(drain::svgPATH & elem, drain::Point2D<int> & imgPoint, double radiusM, double azimuthR) const {
        convert(radiusM, azimuthR, imgPoint);
        elem.absolute<drain::svgPATH::MOVE>(imgPoint.x, imgPoint.y);
    }
 
    // Simple version not sharing end point.
    inline
    void moveTo(drain::svgPATH & elem, double radius, double azimuth) const {
        drain::Point2D<int> imgPoint;
        moveTo(elem, imgPoint, radius, azimuth);
    }
 
    inline
    void lineTo(drain::svgPATH & elem, double radius, double azimuth) const {
        drain::Point2D<int> imgPoint;
        lineTo(elem, imgPoint, radius, azimuth);
    }
 
    inline
    void lineTo(drain::svgPATH & elem, drain::Point2D<int> & imgPoint, double radiusM, double azimuthR) const {
        convert(radiusM, azimuthR, imgPoint);
        elem.absolute<drain::svgPATH::LINE>(imgPoint.x, imgPoint.y);
    }
 
 
 
    void cubicBezierTo(drain::svgPATH & elem, double radiusM, double azimuthStartR, double azimuthEndR) const ;
 
    void cubicBezierTo(drain::svgPATH & elem, drain::Point2D<int> & imgPoint, double radiusM, double azimuthStartR, double azimuthEndR) const;
 
    inline
    void close(drain::svgPATH & elem){
        elem.absolute<drain::svgPATH::CLOSE>();
    }
 
protected:
 
    int radialBezierResolution;
 
};
 
/*
template <class T>
void RadarSVG::updateCartesianConf(const drain::SmartMap<T> & where) {
 
    drain::Logger mout(__FILE__, __FUNCTION__);
    // Todo: also support fully cartesian input (without single-site metadata)
    // radarProj.setSiteLocationDeg(where["lon"], where["lat"]);
 
    const int epsg = where.get("epsg", 0); // non-standard
    if (epsg){
        mout.attention("EPSG found: ", epsg);
        geoFrame.setProjectionEPSG(epsg);
        // radarProj.setProjectionDst(epsg);
    }
    else {
        const std::string projdef = where.get("projdef", ""); // otherwise gets "null"
        geoFrame.setProjection(projdef);
        // radarProj.setProjectionDst(projdef);
    }
    geoFrame.setBoundingBoxD(where["LL_lon"], where["LL_lat"], where["UR_lon"], where["UR_lat"]);
    geoFrame.setGeometry(where["xsize"], where["ysize"]);
 
}
*/
 
} // rack::
 
 
DRAIN_ENUM_DICT(rack::RadarSVG::StyleClasses);
 
DRAIN_ENUM_OSTREAM(rack::RadarSVG::StyleClasses);
 
namespace drain {
 
template <> // for T (Tree class)
template <> // for K (path elem arg)
inline
const image::TreeSVG & image::TreeSVG::operator[](const rack::RadarSVG::StyleClasses & cls) const {
    return (*this)[EnumDict<rack::RadarSVG::StyleClasses>::dict.getKey(cls, false)];
}
 
template <> // for T (Tree class)
template <> // for K (path elem arg)
inline
image::TreeSVG & image::TreeSVG::operator[](const rack::RadarSVG::StyleClasses & cls) {
    return (*this)[EnumDict<rack::RadarSVG::StyleClasses>::dict.getKey(cls, false)];
}
 
template <> // for T (Tree class)
template <> // for K (path elem arg)
inline
bool image::TreeSVG::hasChild(const rack::RadarSVG::StyleClasses & cls) const {
        return hasChild(EnumDict<rack::RadarSVG::StyleClasses>::dict.getKey(cls, true)); // no error
}
 
}
 
#endif