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#pragma once
#include "glGrib/Options.h"
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <string>
namespace glGrib
{
class Projection
{
public:
enum type
{
XYZ=0,
POLAR_NORTH=1,
POLAR_SOUTH=2,
MERCATOR=3,
LATLON=4
};
virtual const glm::vec3 project (const glm::vec3 & xyz, const glm::mat3 & coordm) const = 0;
virtual int unproject (const glm::vec3 & xa, const glm::vec3 & xb, glm::vec3 * xyz, const glm::mat3 & coordm) const = 0;
virtual const glm::mat4 getView (const glm::vec3 & p, const float dist, const glm::mat3 & coordm,
const glm::vec3 & center, const glm::vec3 & up, const float roll) const = 0;
virtual int getType () const = 0;
virtual bool setLon0 (const float &) const = 0;
static type typeFromString (std::string str);
};
class ProjectionXYZ : public Projection
{
public:
const glm::vec3 project (const glm::vec3 & xyz, const glm::mat3 & coordm) const override;
int unproject (const glm::vec3 & xa, const glm::vec3 & xb, glm::vec3 * xyz, const glm::mat3 & coordm) const override;
const glm::mat4 getView (const glm::vec3 & p, const float dist, const glm::mat3 & coordm,
const glm::vec3 & center, const glm::vec3 & up, const float roll) const override;
int getType () const override { return Projection::XYZ; }
bool setLon0 (const float &) const override { return false; }
};
class ProjectionLatLon : public Projection
{
public:
const glm::vec3 project (const glm::vec3 & xyz, const glm::mat3 & coordm) const override;
int unproject (const glm::vec3 & xa, const glm::vec3 & xb, glm::vec3 * xyz, const glm::mat3 & coordm) const override;
const glm::mat4 getView (const glm::vec3 & p, const float dist, const glm::mat3 & coordm,
const glm::vec3 & center, const glm::vec3 & up, const float roll) const override;
int getType () const override { return Projection::LATLON; }
bool setLon0 (const float & lon) const override { lon0 = lon; return true; }
private:
mutable float lon0 = 180.0; // Latitude of right handside
};
class ProjectionMercator : public Projection
{
public:
const glm::vec3 project (const glm::vec3 & xyz, const glm::mat3 & coordm) const override;
int unproject (const glm::vec3 & xa, const glm::vec3 & xb, glm::vec3 * xyz, const glm::mat3 & coordm) const override;
const glm::mat4 getView (const glm::vec3 & p, const float dist, const glm::mat3 & coordm,
const glm::vec3 & center, const glm::vec3 & up, const float roll) const override;
int getType () const override { return Projection::MERCATOR; }
bool setLon0 (const float & lon) const override { lon0 = lon; return true; }
private:
mutable float lon0 = 180.0; // Latitude of right handside
};
class ProjectionPolarNorth : public Projection
{
public:
const glm::vec3 project (const glm::vec3 & xyz, const glm::mat3 & coordm) const override;
int unproject (const glm::vec3 & xa, const glm::vec3 & xb, glm::vec3 * xyz, const glm::mat3 & coordm) const override;
const glm::mat4 getView (const glm::vec3 & p, const float dist, const glm::mat3 & coordm,
const glm::vec3 & center, const glm::vec3 & up, const float roll) const override;
int getType () const override { return Projection::POLAR_NORTH; }
bool setLon0 (const float &) const override { return false; }
};
class ProjectionPolarSouth : public Projection
{
public:
const glm::vec3 project (const glm::vec3 & xyz, const glm::mat3 & coordm) const override;
int unproject (const glm::vec3 & xa, const glm::vec3 & xb, glm::vec3 * xyz, const glm::mat3 & coordm) const override;
const glm::mat4 getView (const glm::vec3 & p, const float dist, const glm::mat3 & coordm,
const glm::vec3 & center, const glm::vec3 & up, const float roll) const override;
int getType () const override { return Projection::POLAR_SOUTH; }
bool setLon0 (const float &) const override { return false; }
};
class ProjectionSet
{
public:
ProjectionSet ()
{
setup ();
}
ProjectionSet & operator= (const ProjectionSet & ps)
{
if (this != &ps)
{
setup ();
current_ = ps.current_;
}
return *this;
}
Projection * current () const
{
return proj[current_];
}
Projection * next ()
{
current_++; current_ %= 5; return current ();
}
void setType (const Projection::type & type)
{
current_ = type;
}
virtual const std::string currentName () const
{
#define if_type(x) case Projection::x: return #x
switch (current_)
{
if_type (XYZ);
if_type (POLAR_NORTH);
if_type (POLAR_SOUTH);
if_type (MERCATOR);
if_type (LATLON);
}
#undef if_type
return "";
}
private:
int current_ = Projection::XYZ;
void setup ()
{
proj[0] = &proj_xyz;
proj[1] = &proj_polar_north;
proj[2] = &proj_polar_south;
proj[3] = &proj_mercator;
proj[4] = &proj_latlon;
}
Projection * proj[5];
ProjectionXYZ proj_xyz;
ProjectionPolarNorth proj_polar_north;
ProjectionPolarSouth proj_polar_south;
ProjectionMercator proj_mercator;
ProjectionLatLon proj_latlon;
};
}
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