what do you mean by offset? how
what do you mean by offset? how
If you consider it like a string rather than a picture, how would you move the first two letters to the back of a string? There are several ways to do it, and some are better than others, but simple will be good enough for now.
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Mats
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Please don't PM me for help - and no, I don't do help over instant messengers.
so i could use >> operator,
say data = data >> 3
?
oh i was just reading up on the >> operator.
for the string thing i would get the first character them move to last character.
for a 5 item array.......
so array[0] moves to array[4]
but am not sure on how to say move
M-N?
i think
Last edited by taurus; 10-14-2007 at 12:27 PM.
help
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.
well i think id take the last column in the array and move it to the first if i was to scroll right, but im still like confused on exactly how to do it, need a hint.
how would i set it to another area
cant i do something like using the >> operator?
Last edited by taurus; 10-14-2007 at 12:42 PM.
The >> operator is essentially a divide by a power of 2, so for example x >> 3 is the same as x / (2 * 2 * 2), which turns out as x / 8. It doesn't do anything useful on strings (or any other arrays).
[In C++ the >> operator, and the complementary << operator, are used as a way to input and output (respectively) data from/to the console, as alternatives to scanf and printf - but in standard C, that's not meaningful at all. ]
--
Mats
Last edited by matsp; 10-14-2007 at 01:00 PM.
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.
hmmm, i dont know then how i can do it.
I need some help on this pls.
how to i move the colums to the other end for horizontal scroll?
Last edited by taurus; 10-14-2007 at 01:02 PM.
Start by writing a piece of code to scroll a piece of text around, based on:
str: char array with text in it.
n = strlen(str);
m = some number you've given.
write a function
scroll(str, n, m)
that modifies by str "rotating" it M steps.
If you can't do that, it's no point in trying to get that working on an image - it will just be much harder to figure out what's going on, because you won't be bale to immediately spot what's going wrong. Once you can do that, just change the scroll to take pixels (ints) instead of chars, or rows of pixels instead of chars for the vertical scroll, and you have your function ready to go.
--
Mats
Last edited by matsp; 10-14-2007 at 02:20 PM. Reason: Fix minor thinko's.
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IS something like this adequate for image scrolling procedure :
Code:Image_horiscroller(INTEGER image_olddata[EP100_LIB_MAX_X][EP100_LIB_MAX_Y], INTEGER width, INTEGER height, INTEGER horiscroll) INTEGER * image_data[EP100_LIB_MAX_X][ EP100_LIB_MAX_Y] INTEGER i, j FOR (i <1 TO i<= width) DO FOR (j <1 TO j<=height) DO IF ((i + horiscroll)> width) THEN image_data * [i+horiscroll100] <image_ olddata[i] ELSE IF ((i + horiscroll)<0 THEN image_data * [i+horiscroll+100] <image_ olddata[i] ELSE image_data * [i+horiscroll] <image_ olddata[i] ENDIF ENDIF ENDIF END_Image_horiscroller Image_vertiscroller(INTEGER image_olddata[EP100_LIB_MAX_X][EP100_LIB_MAX_Y], INTEGER width, INTEGER height, INTEGER vertiscroll) INTEGER image_data * [EP100_LIB_MAX_X][ EP100_LIB_MAX_Y] INTEGER i, j FOR (i <1 TO i<= height) DO FOR (j <1 TO j<=width) DO IF ((i + vertiscroll)> height) THEN image_data * [i+vertiscroll100] <image_ olddata[i] ELSE IF ((i + vertiscroll)<0 THEN image_data * [i+vertiscroll+100] <image_ olddata[i] ELSE image_data * [i+vertiscroll] <image_ olddata[i] ENDIF ENDIF ENDIF END_Image_vertiscroller
There seems to be a constant 100 in there that I don't quite understand the meaning of.
--
Mats
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.