Increasing memory?

Programming Questions

TheGamers..

in Programming Questions • 2 years ago

I have just encountered the "OutOfMemoryError" and would like to know if I should increase the memory. Right now I have had the Processing memory set at the default since I have downloaded it and would like to know what is the best amount of memory to allow Processing. Also, do I even need to allow more memory? Below is a snip-pit of my code.

Copy code

int cSize = 500;
void keyReleased() {
if (key == 's' || key == 'S') {
canvas.save("Test.jpg");
}
if (key >= 1) {
cSize = (key*100);
startCanvas();
println(key);
}
}
//Random assortments of code....
void startCanvas() {
canvas = createGraphics(cSize+75,cSize+75,P2D);
canvas.beginDraw();
canvas.background(255);
canvas.smooth();
canvas.noStroke();
canvas.fill(0);
canvas.endDraw();
}

When I run the sketch like it is it runs out of memory, but when I comment out the part where I call startCanvas() it works fine. My question is do I need to up the memory and what is the best amount of memory to allow Processing. If you need more code, or more explanation, I will gladly provide.

P.S. I am using Mac OS X and my main computer uses Windows, so I would also like to know if that would affect anything. I won't be able to respond for at least five to six hours because of school and probably interruptions.

Thanks,

TheGamersHaven

Replies(10)

PhiLho

Re: Increasing memory?

2 years ago

So if you type 'A', you make a canvas of 6575x6575 pixels, and if you type 'z', you get one of 12,275x12,275 pixels, ie. 575MB. A bit big, no?
Try to improve your algorithm before increasing memory, I think.

TheGamers..

Re: Re: Increasing memory?

2 years ago

Thanks for your response. I was trying to make it if you press the keys 1-9... whatever I tried didn't seem to work. I forgot that keys were assigned a number and that when I would multiply it by 100 it would come out to such high results. I'll definitely fix that!

Thanks,

TheGamersHaven

PhiLho

Re: Increasing memory?

2 years ago

OK, try something like int keyNb = key - '0'; and check if result is between 1 and 9, in case you hit another key.

TheGamers..

Re: Re: Increasing memory?

2 years ago

Thanks for your response, but I am a complete beginner to Processing and don't really know what you mean by "try something like int keyNb = key - '0';". What would I do with that?

*EDIT* I don't know if this matters, but I forgot to put this in the code above. So, here it is...

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if (key >= 1 && key <= 9) {
    cSize = (key*100);
    startCanvas();
    println(key);
}

I don't know why this wouldn't work.

Thanks,

TheGamersHaven

PhiLho

Re: Increasing memory?

2 years ago

Put my line above the code you show, and replace key by keyNb.
key is '0' to '9', ie. it holds characters, not numbers. The key - '0' is a "magical" trick resulting in a number between 0 and 9.

TheGamers..

Re: Re: Increasing memory?

2 years ago

Ok, I did, why is key - '0' a magic trick resulting in a number between 0 and 9?
When I tested it, it only works with the number six and higher... how do I get it to work with numbers 0-9? This is what the code looks like now.

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int keyNb = key - '0';
if (keyNb >= 1 && keyNb <= 9) {
    cSize = (keyNb*100);
    startCanvas();
    println(key);
}

Thanks,

TheGamersHaven

anchnk

Re: Increasing memory?

2 years ago

Ok, I did, why is key - '0' a magic trick resulting in a number between 0 and 9?

As phi.lho stated, key holds a char. A character is a single 16-bit Unicode character

The character '1' -> the binary value 0000000000110001 -> the decimal value 49
The character '0' -> the binary value 0000000000110000 -> the decimal value 48

Now, Let's type 1 on your keyboard. key hold the character '1'.
When you type int keyNb = key - '0'; the java compiler will substract '1' to '0' (that gives 0000000000000001) and then convert that binary sequence to an int which finally is the value 1.

I tried your code above and it works ok for me. Is it the zero or O character you used ?

TheGamers..

Re: Re: Increasing memory?

2 years ago

Thanks for your response, where do you find out what each character equals in binary and decimal values?
I used the zero character, but it only works for the numbers 6-9. Why is that, and also, I set it so that when you press a number it will multiply it by 100 and then set cSize to that number and then set that to the size of the canvas... So if I press 1, it should set the canvas to 100 etc... I made it print the size of the canvas and it says it is working for the numbers 1-9, but for the numbers 1-5 the canvas doesn't change size.

*EDIT*
I just reduced the size() to (1,1). Now the numbers 1-5 work. For some reason it doesn't decrease the size of the canvas.

Thanks,

TheGamersHaven

anchnk

Re: Increasing memory?

2 years ago

Thanks for your response, where do you find out what each character equals in binary and decimal values?

I've used processing binary() function to do the conversion.
This website could help too.
It's all about the unicode standard.

Ok nice if it works now.

jeff_g

Re: Increasing memory?

2 years ago

Didn't see this answered... but you increase the memory under Processing Preferences

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