diff options
Diffstat (limited to 'src/lsq_funcs.mac')
-rw-r--r-- | src/lsq_funcs.mac | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/src/lsq_funcs.mac b/src/lsq_funcs.mac new file mode 100644 index 0000000..de71198 --- /dev/null +++ b/src/lsq_funcs.mac @@ -0,0 +1,40 @@ +/* + * This is the basic pinhole projection model with distortion correction + */ + +x : tan(m_view - c_view); +y : tan(c_nick - m_nick); +x_rot : y * sin(c_tilt) + x * cos(c_tilt); +y_rot : y * cos(c_tilt) - x * sin(c_tilt); +d : x_rot ^ 2 + y_rot ^ 2; +dist_fact : d ^ 2 * k1 + d * k0; +x_dist : x_rot * (1 + dist_fact) * scale; +y_dist : y_rot * (1 + dist_fact) * scale; + +/* + * Some mangling for C code generation + */ + +x_expand : trigexpand(x_dist); +y_expand : trigexpand(y_dist); + +args: "(double c_view, double c_nick, double c_tilt, double scale, double k0, double k1, double m_view, double m_nick)"; + +printfunc(name, expression) := sprint("static double", name, args, "{ return ", string(subst(pow, "^", expression)), ";}", " +"); + +printfunc("mac_x", x_expand); +printfunc("mac_y", y_expand); + +printfunc("mac_x_dc_view", diff(x_expand, c_view)); +printfunc("mac_x_dc_nick", diff(x_expand, c_nick)); +printfunc("mac_x_dc_tilt", diff(x_expand, c_tilt)); +printfunc("mac_x_dscale", diff(x_expand, scale)); +printfunc("mac_x_dk0", diff(x_expand, k0)); +printfunc("mac_x_dk1", diff(x_expand, k1)); +printfunc("mac_y_dc_view", diff(y_expand, c_view)); +printfunc("mac_y_dc_nick", diff(y_expand, c_nick)); +printfunc("mac_y_dc_tilt", diff(y_expand, c_tilt)); +printfunc("mac_y_dscale", diff(y_expand, scale)); +printfunc("mac_y_dk0", diff(y_expand, k0)); +printfunc("mac_y_dk1", diff(y_expand, k1)); |