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Advanced Member

Joined: 11 Jun 2003
Posts: 499

Posted: 10 Sep 2003 08:05:38 am    Post subject:

ok, i know that pxlchk has its 0,0 in the top left corner and the point on has its in the bottom left, is there a little boolean magic to turn this around? i wanna pixl check a dot and if it is 1 then return the coord so it is in the proper context for the pt-on command
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aka Tianon


Joined: 02 Jun 2003
Posts: 1874

Posted: 10 Sep 2003 08:20:01 am    Post subject:

i figured it out once... i dunno how i did it though Neutral sorry! i know i either added or subtracted 47 from 1 number, and 31 with the other... just mess with it and it may work.... what zoom? that also effects it....

Note: my suggestions will only work with the Integer zoom...

Last edited by Guest on 10 Sep 2003 08:20:34 am; edited 1 time in total
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Arcane Wizard

Super Elite (Last Title)

Joined: 02 Jun 2003
Posts: 8993

Posted: 10 Sep 2003 10:00:20 am    Post subject:

If Pxl-Test(Y,X)


If Pxl-Test(Y,X
Pt-On(X+1,63-Y //You can replace 1 with Xmin and 63 with Ymax if you'd want to

You can optimize it of course, for example:


If Pxl-Test(Y,X

Of course this only works with an x range of 95 and y range of 63. So if you're using a different windows setting, please say so and I (or somebody else) will think of something that works with your window setting.

Last edited by Guest on 10 Sep 2003 10:10:38 am; edited 1 time in total
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Darth Android
DragonOS Dev Team

Bandwidth Hog

Joined: 31 May 2003
Posts: 2104

Posted: 10 Sep 2003 11:47:54 pm    Post subject:

or just use the Pxl-On( insted of the Pt-On(.
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Advanced Member

Joined: 11 Jun 2003
Posts: 499

Posted: 11 Sep 2003 02:47:50 pm    Post subject:

after i posted i though of what darth is saying, and it worked! Thx for the suggestions, ill put it iall in a .TXT for future reference (so i dont repeat the post Laughing )
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Justin W.
Shattered Silence

Advanced Member

Joined: 24 May 2003
Posts: 429

Posted: 11 Sep 2003 03:18:59 pm    Post subject:

I'm glad that Darth made mention of the fact that it is better to use pxl-on rather than point on when you want to test a pixel. The benifit is just that, the coordinates are the same and don't require extra code that takes up space and speed.
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