Background image slows down sketch

Programming Questions

cantona360

Background image slows down sketch

in Programming Questions • 8 months ago

Hello,

after inserting a background image ,the sketch tends to run much more less smoother

I read somewhere that it's because your background image is loading with every frame rate but i am not sure about that

Any form of help would be much appreciated

void setup() {
size(1026, 770, P3D);
frameRate(40);
b = loadImage("data/2.jpg");
font = loadFont("TrebuchetMS-Italic-20.vlw");
textFont(font);
textMode(SCREEN);
println(Serial.list());
serial = new Serial(this, Serial.list()[serialPort], 115200);
for(int i = 0; i < sen; i++) {
n[i] = new Normalize();
cama[i] = new MomentumAverage(.01);
axyz[i] = new MomentumAverage(.15);
}
reset();
}
void draw() {
background(b);
updateSerial();
drawBoard();
}

Any form of help would be much appreciated

Replies(4)

PhiLho

Re: Background image slows down sketch

8 months ago

In
b = loadImage("data/2.jpg");
the data/ part is probably not necessary, as loadImage() automatically looks into this folder.

And, well, indeed drawing a big image on each frame can take some time.
I don't see much workarounds for this, unless perhaps by using OpenGL textures or something (but I don't master this technique).

cantona360

Re: Background image slows down sketch

8 months ago

ok thanks,

but isn't there a way to load the background image just once?

quarks

Re: Background image slows down sketch

8 months ago

In your code the image is only being loaded once.

A Processing sketch starts

it executes the code in setup(), just once then
executes draw approximately 60 times a second

you could add the following statement to the draw method (see frameRate)

println(frameRate);


this will tell you how often the draw() method is executed. Try it with and without using the background 
image and see what the difference is.

cantona360

Re: Background image slows down sketch

8 months ago

ok thanks for the info ,

I found my error . it wasn't a software problem, my setup wasn't connected to ground properly

it now works smoothly :)

Top Reply