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committing changes made at and just before the sage31 work days
doing some cosmetic changes -- adding comments in preparation for adding a tikz image generator
test development branch
syncing pg HEAD with pg2.4.7 on 6/25/2009
Fixed bug which caused warnings in problems containing hints and/or solutions containing math (i.e., requiring images).
Make sure that WeBWorK::Constants has been loaded before this file is evaluated.
Create equations directory if it doesn't exist. All directories under tmp should be recreated if they don't exist. Arnie
Change permission of tmp files so that they can be removed. Arnie
Most of the work for adjusting vertical alignment of images is here.
Removed extra spaces from around dvipng images. (These can cause bad line breaks, e.g. between mathematics and the punctuation that follows.)
ImageGenerator is now using WeBWorK::Constants
When using the imageCache (which is always), put images into subdirectories based on the first two characters of their md5 hash.
Modified DVIPNG_ARGS to work with dvipng >= 1.0.
Allow a 256 error from dvipng. This seems to be necessary on webwork.math.rochester.edu, so I'm commiting it to the CVS as well to keep the two systems in sync. --Mike
Added error messages that should make it easier to tell if certain directories have not been created. Also checks that files are actually created and written at each step of the process. --Mike
changed documentation to reflect the fact that reh refresh and mtime flags are no longer used
added image generation modules from WW2
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