[etoys-dev] New Graphing tools
K. K. Subramaniam
kksubbu.ml at gmail.com
Tue May 24 23:08:29 EDT 2011
On Monday 23 May 2011 6:35:00 PM karl ramberg wrote:
> I was thinking of using 'forward' together with griding so 'forward' would
> mean move one grid space, not one pixel.
I like this idea but not its connection with "snap to grid" option (this is
related to layout not co-ords). Pixels are implicitly defined by DisplayScreen
geometry and Mouse co-ordinates both of which are related to physical
dimensions. Projects will be distorted when viewed in a web-browser on screens
with different aspect ratios.
In "Basic" category, turn-by and heading use abstract units (angles) while
forward-by uses physical units. Grid units will make all numbers absract (i.e.
pure magnitude). The default grid can be tweaked to compensate for screen
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