[Gzz-commits] manuscripts/Control1 poster.rst

[Tuomas J. Lukka]

CVSROOT:        /cvsroot/gzz
Module name:    manuscripts
Changes by:     Tuomas J. Lukka <address@hidden>        03/05/05 12:51:49

Modified files:
        Control1       : poster.rst 

Log message:
        writing

CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/gzz/manuscripts/Control1/poster.rst.diff?tr1=1.35&tr2=1.36&r1=text&r2=text

Patches:
Index: manuscripts/Control1/poster.rst
diff -u manuscripts/Control1/poster.rst:1.35 
manuscripts/Control1/poster.rst:1.36
--- manuscripts/Control1/poster.rst:1.35        Mon May  5 12:37:19 2003
+++ manuscripts/Control1/poster.rst     Mon May  5 12:51:49 2003
@@ -122,30 +122,14 @@
 
 - accessibility: special controllers for handicapped
 
+Invention of mouse REF??? (Engelbart)
+
 Connecting an optomechanical mouse to LEGO bricks
 =================================================
 
-By far the most difficult part of 
-
-- the first solution using hand-made cardboard optomechanical discs
-    
-    - bad idea
-
-.. - the second solution using non-LEGO cogwheels from
-     thin plastic
-
-     - the same as the previous, bad idea
-  
-- the second solution using only small LEGO cogwheels
-
-    - easier to construct, still too easily hopping over 
-
-- the third and so far the final solution using mouse's own grid wheel
-  and LEGO tires
-
-    - easy to construct, reliable
-
-    - best part = 132-old, but the shaped tyres will also do
+By far the most difficult part of our work with LEGO-based
+controllers has been the interfacing of the LEGO pieces to
+the optomechanical mice.
 
 .. figure:: required.jpg
    :width: 7.5cm
@@ -166,15 +150,44 @@
 
    The mechanism of the mouse: the mouse ball, which rotates
    from contact with the underlying surface, rotates
-   the two axes whose motion is then detected.
+   the two axles whose motion is then detected.
 
 
 .. figure:: optomechanism.jpg
    :width: 7.5cm
    :label: figoptomechanism
 
-   In optomechanical mice, the motion of the axes is detected
+   In optomechanical mice, the motion of the axles is detected
    by the IR light gate whose beam is cut by the slitted disk.
+
+Figures [ref-figrequired]_ - [ref-figoptomechanism] explain
+the internal mechanism of optomechanical mice, 
+
+Our first solutions involved replacing the slitted disks
+moving through the light gate with hand-made cardboard or plastic 
+cutouts skewered on LEGO axles. 
+This turned out not to be a good construction, requiring far too much
+handwork in the construction as well as not being very accurate.
+
+The next solution was to try using small LEGO gears as the slitted
+disks. This made the construction far simpler, requiring no 
+additional materials or tools, but the accuracy was severely 
+affected: the gate missed a large fraction of the events. 
+
+The third and so far final solution 
+
+- the second solution using only small LEGO cogwheels
+
+    - easier to construct, still too easily hopping over 
+
+- the third and so far the final solution using mouse's own grid wheel
+  and LEGO tires
+
+    - easy to construct, reliable
+
+    - best part = 132-old, but the shaped tyres will also do
+
+
 
 An example custom controller for a particular user interface
 ============================================================