This might be related to a change I made in the Agg backend to make the
markers look better by rounding their coordinates to the nearest pixel.
It certainly made the stock markers at a standard size look better, but
I suspect as they get smaller, they are converging down to the same
value, thus having a truly zero-sized marker.
I'm away from a machine with build tools at the moment, so can't
confirm. Does the attached patch work for you?
Mike
Andrew Straw wrote:
John Hunter wrote:
On Sat, Nov 29, 2008 at 3:55 PM, Andrew Straw <[EMAIL PROTECTED]> wrote:
Hi All,
I have been testing the latest svn matplotlib, which failed to produce
any visible data in some long-standing scripts of mine. :(
Investigating further, my use of markersize=0.5 combined with the '.'
symbol and the Agg backend caused a complete disappearance of the
markers. I'm attaching example images from 0.93.3 and the most recent
SVN using the attached script.
I'd be happy to track this down, but I think this might be a no-brainer
for someone on the list.
Is this agg only?
It doesn't happen with PS or SVG, so I'll say yes.
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Index: src/_backend_agg.cpp
===================================================================
--- src/_backend_agg.cpp (revision 6457)
+++ src/_backend_agg.cpp (working copy)
@@ -494,8 +494,8 @@
PathIterator marker_path(marker_path_obj);
// The built-in markers look better if snapping is turned on.
- const bool marker_snap = true;
- // bool marker_snap = should_snap(marker_path, marker_trans);
+ // const bool marker_snap = true;
+ bool marker_snap = should_snap(marker_path, marker_trans);
transformed_path_t marker_path_transformed(marker_path, marker_trans);
simplify_t marker_path_simplified(marker_path_transformed, marker_snap, false, width, height);
curve_t marker_path_curve(marker_path_simplified);
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