1 files changed, 54 insertions, 0 deletions
diff --git a/tracker-easy/tracker-easy-api.cpp b/tracker-easy/tracker-easy-api.cpp
new file mode 100644
index 00000000..49e11759
--- /dev/null
+++ b/tracker-easy/tracker-easy-api.cpp
@@ -0,0 +1,54 @@
+#include "tracker-easy-api.h"
+#include "cv/numeric.hpp"
+
+using namespace numeric_types;
+
+pt_camera_info::pt_camera_info() = default;
+
+f pt_camera_info::get_focal_length(f fov, int res_x, int res_y)
+{
+    const f diag_len = std::sqrt(f(res_x*res_x + res_y*res_y));
+    const f aspect_x = res_x / diag_len;
+    //const double aspect_y = res_y / diag_len;
+    const f diag_fov = fov * pi/180;
+    const f fov_x = 2*std::atan(std::tan(diag_fov*f{.5}) * aspect_x);
+    //const double fov_y = 2*atan(tan(diag_fov*.5) * aspect_y);
+    const f fx = f{.5} / std::tan(fov_x * f{.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;
+
+f pt_point_extractor::threshold_radius_value(int w, int h, int threshold)
+{
+    f cx = w / f{640}, cy = h / f{480};
+
+    const f min_radius = f{1.75} * cx;
+    const f max_radius = f{15} * cy;
+
+    const f radius = std::fmax(f{0}, (max_radius-min_radius) * threshold / f(255) + min_radius);
+
+    return radius;
+}
+
+std::tuple<f, f> pt_pixel_pos_mixin::to_pixel_pos(f x, f y, int w, int h)
+{
+    return std::make_tuple(w*(x+f{.5}), f{.5}*(h - 2*y*w));
+}
+
+std::tuple<f, f> pt_pixel_pos_mixin::to_screen_pos(f px, f py, int w, int h)
+{
+    px *= w/(w-f{1}); py *= h/(h-f{1});
+    return std::make_tuple((px - w/f{2})/w, -(py - h/f{2})/w);
+}
+
+pt_frame::pt_frame() = default;
+
+pt_frame::~pt_frame() = default;