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#include "pt-api.hpp"
#include "cv/numeric.hpp"
using namespace types;
pt_camera_info::pt_camera_info() = default;
double pt_camera_info::get_focal_length(f fov, int res_x, int res_y)
{
const double diag_len = std::sqrt(double(res_x*res_x + res_y*res_y));
const double aspect_x = res_x / diag_len;
//const double aspect_y = res_y / diag_len;
const double diag_fov = fov * M_PI/180;
const double fov_x = 2*std::atan(std::tan(diag_fov*.5) * aspect_x);
//const double fov_y = 2*atan(tan(diag_fov*.5) * aspect_y);
const double fx = .5 / std::tan(fov_x * .5);
return fx;
//fy = .5 / tan(fov_y * .5);
//static bool once = false; if (!once) { once = true; qDebug() << "f" << ret << "fov" << (fov * 180/M_PI); }
}
pt_camera::pt_camera() = default;
pt_camera::~pt_camera() = default;
pt_runtime_traits::pt_runtime_traits() = default;
pt_runtime_traits::~pt_runtime_traits() = default;
pt_point_extractor::pt_point_extractor() = default;
pt_point_extractor::~pt_point_extractor() = default;
double pt_point_extractor::threshold_radius_value(int w, int h, int threshold)
{
double cx = w / 640., cy = h / 480.;
const double min_radius = 1.75 * cx;
const double max_radius = 15 * cy;
const double radius = std::fmax(0., (max_radius-min_radius) * threshold / f(255) + min_radius);
return radius;
}
std::tuple<double, double> pt_pixel_pos_mixin::to_pixel_pos(double x, double y, int w, int h)
{
return std::make_tuple(w*(x+.5), .5*(h - 2*y*w));
}
std::tuple<double, double> pt_pixel_pos_mixin::to_screen_pos(double px, double py, int w, int h)
{
px *= w/(w-1.); py *= h/(h-1.);
return std::make_tuple((px - w/2.)/w, -(py - h/2.)/w);
}
pt_frame::pt_frame() = default;
pt_frame::~pt_frame() = default;
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