+cl-photo (0.9-1) unstable; urgency=low
+
+ * Add extension-tube and print-magnification
+
+ -- Kevin M. Rosenberg <kmr@debian.org> Tue, 10 May 2005 16:10:26 -0600
+
cl-photo (0.8-1) unstable; urgency=high
* bug fixes required for sarge
(1+ (magnification :focal-length focal-length :object-distance object-distance)))
(defun extension-tube (focal-length &key original-object-distance new-object-distance original-image-distance
- new-object-distnace original-magnification new-magification
+ original-magnification
+ new-object-distance new-image-distance new-magnification
extension-length (units :feet))
"Computes the parameters for using extension tubes.
Requires: 1. original-object-distance, original-image-distance, or original-magnification
2. new-object-distance, new-image-distance, new-magnification, or extension-length
-Returns: original-object-distance, original-image-distance, original-magnification,
+Returns: original-object-distance, original-image-distance, original-magnification, original-bellows-factor
new-object-distance, new-image-distance, new-magnification, extension-length."
- )
+
+ (multiple-value-bind (focal-length o-od o-id o-m o-bf)
+ (close-up :focal-length focal-length :object-distance original-object-distance
+ :image-distance original-image-distance :magnification original-magnification :units units)
+
+ (cond
+ (extension-length
+ (multiple-value-bind (focal-length n-od n-id n-m n-bf)
+ (close-up :focal-length focal-length :image-distance (+ o-id extension-length) :units units)
+ (values o-od o-id o-m o-bf n-od n-id n-m n-bf extension-length)))
+ ((not extension-length)
+ (multiple-value-bind (focal-length n-od n-id n-m n-bf)
+ (close-up :focal-length focal-length :object-distance new-object-distance
+ :image-distance new-image-distance :magnification new-magnification :units units)
+ (values o-od o-id o-m o-bf n-od n-id n-m n-bf (- n-id o-id)))))))
+