Hi,

I am trying to make some changes in this Processing program. This is what I want to do:

1. I would like the program to be resized to cover the whole screen (600*800 pixels)
2. I would like the red line in the bottom left corner to emerge from the entire bottom line (from left to right) as the white lines does.

---------------------------------------------------

CODE:

---------------------------------------------------

import ddf.minim.*;
import ddf.minim.analysis.*;

Minim minim;
AudioInput in;
FFT fft;

void setup()
{
 size(512, 200, P3D);

 minim = new Minim(this);
 minim.debugOn();
 
 // get a line in from Minim, default bit depth is 16
 in = minim.getLineIn(Minim.STEREO, 512);
 
 fft = new FFT(in.bufferSize(), in.sampleRate());
}

void draw()
{
 background(0);
 stroke(255);
 
 // draw the waveforms
 for(int i = 0; i < in.bufferSize() - 1; i++)
 {
   line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);
   line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);
 }
 
 // Calculate & draw FFT spectrum
 
 stroke(255,0,0);
 fft.forward(in.mix);
 for(int i = 0; i < fft.specSize(); i++)
 {
   // draw the line for frequency band i, scaling it by 4 so we can see it a bit better
   line(i, height, i, height - fft.getBand(i)*4);
 }

}


void stop()
{
 // always close Minim audio classes when you are done with them
 in.close();
 minim.stop();
 
 super.stop();
}


--------------------------------
I hope someone can help me!

Best,
Celia

Thank you. Yes, I know how to change the size of the whole screen, but the lines are not following. What I need is for the whole program and graphics to cover the screen.

The prgram is for an art installation and is planned to be shown on an old computerscreen: 800*600 in fact I think maybe it can go up to 1024*768.

I still need some guidance on this.

Best,
Celia

it's these bits that do the drawing

this bit is drawing the waveform and is limited by in.buffersize in the x direction.

for(int i = 0; i < in.bufferSize() - 1; i++)
{
  line(i, 50 + in.left.get(i)*50, i+1, 50 + in.left.get(i+1)*50);
  line(i, 150 + in.right.get(i)*50, i+1, 150 + in.right.get(i+1)*50);
}

and this is drawing the bars, this time limited by fft.specSize in the x direction.

stroke(255,0,0);
fft.forward(in.mix);
for(int i = 0; i < fft.specSize(); i++)
{
  // draw the line for frequency band i, scaling it by 4 so we can see it a bit better
  line(i, height, i, height - fft.getBand(i)*4);
}

you can't really change these two values without changing the way it looks. but you can mutliply both x and y arguments in the line() calls to match the new screen size.

alternatively, pushMatrix() and scale() at the start of the draw() and popMatrix() at the end as a quick and dirty way to scale the entire thing.

Thank you both: Cedric and koogy. Now the program works perfectly, and I understand a lot more about how it is built.


Thank you for sharing your knowledge, and helping me solve the issue.

Best,
Celia