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Topic: typography problem (Read 408 times) |
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benelek
 
 
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typography problem
« on: Feb 22nd, 2003, 1:11pm » |
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sorry about sticking the task of debugging to the board... but i can't for the life of me figure out why the following code doesn't work the way i'm intending.
it's basically the same as the noise1 example i posted a couple of days ago in the "nonresponsive" section, but i've changed the image and added a screenGrab function.
the problem is that only the first screengrab imprints a timestamp on the image, though i can't figure out why it doesn't for the rest.
Code:
void setup() {
size(352,288);
noBackground();
backImg = loadImage("In da office.JPG");
timeLog = loadFont("BauerBodoni-Bold.vlw.gz");
setFont(timeLog);
System.arraycopy(backImg.pixels,0,pixels,0,backImg.pixels.length);
}
BImage backImg;
BFont timeLog;
boolean scrnSht=false;
void loop() {
int addOn=0;
//horizontal run.
for(int i=0; i<pixels.length; i++) {
if(i%width == 0) {
addOn = int(random(0,10));
}
pixels[i]+=addOn;
}
//vertical run.
for(int i=0; i<width; i++) {
for(int j=0; j<pixels.length; j+=width) {
if(j==0) {
addOn = int(random(-30,0));
}
pixels[i+j]+=addOn;
}
}
//screengrab part.
if(scrnSht==true) {
int ellapsed = millis()/3600000;
int[] pixelsA = new int[pixels.length];
System.arraycopy(pixels,0,pixelsA,0,pixels.length);
scale(2);
text(ellapsed + " hrs",5,7);
scale(0.5);
screenGrab();
pixels = pixelsA;
scrnSht=false;
}
}
void keyPressed() {
if(key==' ') { scrnSht=true; }
}
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thanks,
-jacob
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fry
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Re: typography problem
« Reply #1 on: Feb 22nd, 2003, 4:06pm » |
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i don't see anything immediate, it's a longshot, but it might be a threading issue.. i wonder if somehow screenGrab() hasn't finished writing data before you switch back pixels and pixelsA on that very next line, and so it's writing the non-timestamped image.
you might try setting a single pixel in the other pixels array to red or something obvious and see if that's what's going on.
fyi, you can also use setFont(timeLog, 24) instead doing that extra scale() before you draw the text.
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benelek
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Re: typography problem
« Reply #2 on: Feb 23rd, 2003, 7:11am » |
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mm, well i'm not sure what difference this makes, but when i changed "pixels = pixelsA;" into an arraycopy, the problem was fixed. could the problem still be in threading?
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