From bc36079638b4ff3d0b7b3476dc5125bb1fc38c91 Mon Sep 17 00:00:00 2001
From: Johannes Hofmann <Johannes.Hofmann@gmx.de>
Date: Fri, 2 May 2008 15:48:58 +0200
Subject: fix rectilinear projection

---
 src/lsq_rectilinear.mac | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/lsq_rectilinear.mac b/src/lsq_rectilinear.mac
index 5bd7ac9..d1abf4e 100644
--- a/src/lsq_rectilinear.mac
+++ b/src/lsq_rectilinear.mac
@@ -2,8 +2,11 @@
  * rectilinear (pinhole) projection model with distortion correction
  */
 
-x : tan(m_view - c_view)$
-y : tan(c_nick - m_nick)$ 
+a_v : m_view - c_view$
+a_h : c_nick - atan (tan (m_nick) / cos(a_v))$
+
+x : tan(a_v)$
+y : tan(a_h)$ 
 x_rot : y * sin(c_tilt) + x * cos(c_tilt)+x0$
 y_rot : y * cos(c_tilt) - x * sin(c_tilt)$
 d : x_rot ^ 2 + y_rot ^ 2$
-- 
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