diff options
| author | Johannes Hofmann <Johannes.Hofmann@gmx.de> | 2008-05-24 00:08:29 +0200 |
|---|---|---|
| committer | Johannes Hofmann <Johannes.Hofmann@gmx.de> | 2008-05-24 00:08:29 +0200 |
| commit | bac85749b75971ee75d635bea3117f8a4f640e1c (patch) | |
| tree | 1fe3b28a26d0cd7762449c42f44275497dc6b38f | |
| parent | f35a69d7bfb469f664735a1499d7eb553cdd597f (diff) | |
major simplification of rectilinear projection
| -rw-r--r-- | src/lsq_rectilinear.mac | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/src/lsq_rectilinear.mac b/src/lsq_rectilinear.mac index 3c5b367..4ed1e09 100644 --- a/src/lsq_rectilinear.mac +++ b/src/lsq_rectilinear.mac @@ -12,15 +12,8 @@ c_x_rot : cos(c_nick) * c_x$ + sin(c_nick) * c_z$ c_y_rot : c_y$ c_z_rot : -sin(c_nick) * c_x + cos(c_nick) * c_z$ -/* back to spherical coordinates */ -a_h : \pi / 2 - acos(c_z_rot)$ -a_v : atan(c_y_rot / c_x_rot)$ - -/* angle over horizon in view direction */ -a_h_dir : atan (tan (a_h) * sqrt(tan(a_v) ^2 + 1))$ - -x : tan(a_v)$ -y : tan(-a_h_dir)$ +x : c_y_rot / c_x_rot$ +y : - c_z_rot / c_x_rot$ x_rot : y * sin(c_tilt) + x * cos(c_tilt)+x0$ y_rot : y * cos(c_tilt) - x * sin(c_tilt)$ |