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authorJohannes Hofmann <Johannes.Hofmann@gmx.de>2008-05-24 00:08:29 +0200
committerJohannes Hofmann <Johannes.Hofmann@gmx.de>2008-05-24 00:08:29 +0200
commitbac85749b75971ee75d635bea3117f8a4f640e1c (patch)
tree1fe3b28a26d0cd7762449c42f44275497dc6b38f /src
parentf35a69d7bfb469f664735a1499d7eb553cdd597f (diff)
major simplification of rectilinear projection
Diffstat (limited to 'src')
-rw-r--r--src/lsq_rectilinear.mac11
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)$