pic ids

[Andy]

ok i know how to take a snap shot on the screen but what i want to know is i you save two pictures using Pic.Save can you compare them to see if they're the same picture?

[Cervantes]

compare them in Turing or in Windows?

I haven't used Pic.Save before.. the only way I can think to compare them is to compare their file sizes. I know that doesn't mean they're the same, but its the best I can do

[McKenzie]

You have to use this interesting function called whatdotcolour, maybe you've heard of it

code:

var same :=true Pic.Draw(firstpic,somex,somey,picXor) Pic.Draw(secondpic,somex,somey,picXor) for x:somex .. somex + picWidth -1     for y:somey .. somey + picHeight -1         if whatdotcolour(x,y) > 0 then             same := false         end if     end for end for

[Cervantes]

whatdotcolour? never heard of it!
but the whatdotcolour > 0 part confuses me.... so your just checking the outline..?

[McKenzie]

but seriously you can just open them up as binary files read one character at a time from each and compare them this way.

[McKenzie]

it'll work, but it was a joke. Dodge loves whatdotcolour, and I recently wrote a tutorial on the almost useless ability to draw pics using picXor. I figured why not combine them? whatdotcolour is actually quite usefull. What it does is return the colour value of a pixel on the screen. In this case if both pics are the same the XOR will cause the to blank out. So I check the entire area to see if its all white.

[Cervantes]

yeah I kinda noticed his love for whatdotcolor lol. I love it too (btw what I said about never heard of it was a joke too)

[McKenzie]

oops, should have figured that when you asked about the outline

[Cervantes]

indeed.

dodge what do you need this for?? are you just playing around or are you making some elaborate program (that I'm assuming would use whatdotcolor exclusively )