There's a big question and a small question.
Big one:
I want to create a large number of shapes (probably rectangles) on the screen (somewhere in the 5-10,000 range) for a visualization application. Each rectangle represents one point in my dataset, they will all be the same size, but each will be a different colour (probably < 16 different colours used), and obviously each will be in a different location.
Any suggestions on the best way to do this ?
The docs said (in "Revolution for Hypercard programmers") that it was faster to draw graphic objects than paint shapes. But I worry about the overhead of making each of them a control, when there are so many of them (and when I'm not going to take any real advantage - I would in some cases be able to simply change the colour, but many of the user controls will cause the positions to change also).
Small question: I tried this out, but obviously have missed something.
The script (see below) uses (tries to use) templateGraphic to set the size and colour, but this doesn't seem to have any effect. It also uses lockscreen - but I see each rectangle being drawn one-by-one - I had expected that with lockscreen set, I would see nothing until all the rectangles were drawn and lockscreen was set false again.
Script is :
on mouseUp put the filename of this stack & cr into field "Field 1" put 0 into Kbase put the ticks into startTime put 10 into N set the style of templateGraphic to rectangle set the width of templateGraphic to 8 set the height of templateGraphic to 6 set the foregroundColor of templategraphic to "Firebrick3"
set the lockScreen to true
repeat with k1 = 1 to N
repeat with k2 = 1 to N
put Kbase + N*k1 + k2 into Kounter
put "G"&Kounter into G
create graphic G
-- set the style of graphic G to rectangle
set the location of graphic G to (100+10*k1,100+10*k2)
-- set the width of graphic G to 8
-- set the height of graphic G to 6
-- set the foregroundColor of graphic G to "Firebrick3"
end repeat
end repeat
set the lockScreen to false
put the ticks -startTime & cr after field "Field 1"end mouseUp
Please feel free to comment on, or improve, any part of it - not just the questions I asked ...
-- Alex.
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