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Vomirak

Sat Nov 05, 2011 12:18 pm


How do I eliminate flickering for "for loops"?

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So this assignment im working on is due monday, but I have a problem with getting View.Update to work properly. I've played around with View.Update and i can't get it to work how I want.
I have an object that has 7 layers of shapes/code on it, and whenever i try to make him move in a random direction, the object just flickers, this is what I'm doing to make him move,

for x : 0..200
draw blah blah blah %%%original shape%%%
delay (5)
draw blah blah blah %%%eraser that follows original shape%%%
end for

What am i doing wrong?


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Insectoid

Sat Nov 05, 2011 1:05 pm


RE:How do I eliminate flickering for "for loops"?

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This is what your code should look like

[code]
for x:0..200
    draw blah blah blah
    View.Update
    delay (five)
    erase stuff
end for
[/code]

The general order of operations is draw stuff, view.update, delay, erase stuff.


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Aange10

Sat Nov 05, 2011 9:01 pm


RE:How do I eliminate flickering for "for loops"?

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Here's an example, aswell


View.Set ("offscreenonly")
for i : 1 .. 5
    cls
    drawfillbox (10, 0, 40, 40, (11 + i))
    View.Update
    delay (1000)
end for




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Beastinonyou

Sun Nov 06, 2011 7:05 am


Re: RE:How do I eliminate flickering for "for loops"?

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View.Set ("offscreenonly")


I bet this is the line of code he's missing from his program. Without this, View.Update does nothing.


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Velocity

Tue Nov 08, 2011 8:34 pm


RE:How do I eliminate flickering for "for loops"?

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You can add View.Set ("offscreenonly")
^^^ 
at the beginning of your loop

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and ...
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View.UpdateArea (0, 0, maxx, maxy)

^^^ 
at the end of your loop