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Index › Programming Questions & Help › Syntax Questions › make Waveform moving
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make Waveform moving (Read 571 times)
TiPpFeHlEr
make Waveform moving
Oct 17th, 2009, 4:19am  
hi,

i want to draw a waveform with
Code:
noFill();
	stroke(255);
	beginShape();
	for ( int i = 1; i < 400; i++ )
	{
	  vertex(i, height- readings3[i]/3);
	  
	}
	endShape();


the problem is, the whole waveform should move vom right to left!
like audiosignal an a timeline.
how kann i do this??

regards maik
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blindfish
Re: make Waveform moving
Reply #1 - Oct 17th, 2009, 6:38am  
Assuming the data in 'readings3' is constantly being updated with new values, then it's perhaps worth looking at using an ArrayList instead of a standard array.  This gives you access to add() and remove() methods (see the linked Java reference description): when new data needs to be written remove() the first (i.e. oldest) element from the array and add() the new data to the end.  You'd then need to make some minor changes to your code to draw the wave: ArrayList has a get() method to access items in the array, and you'd do well to make your loop:

for (int i=0; i<readings3.size(); i++)

If on the other hand the array is static you could just remove a value from the beginning of the array and add it to the end; though in this case you'd need to ensure the initial first and last values 'joined up' or you'd get an obvious break in the wave form...
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Where is the what if the what is in why?
 
TiPpFeHlEr
Re: make Waveform moving
Reply #2 - Oct 24th, 2009, 2:19am  
hi BlindFish

i found a way to do that  Cool

Code:
/////////////////////////////////AUDIO-Signal///////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////
float a(){
  float k = map(myFFT.getAvg(range-1), 0, 100, 0, 2);
  a= pow(k, 3);
  return a;
}
float b(){
 float n = map(myFFT.getAvg(range), 0, 100, 0, 2);
  b= pow(n, 3);
  return b;
}
float c(){
  float m = map(myFFT.getAvg(range+1), 0, 100, 0, 2);
  c= pow(m, 3);
  return c;
} 
/////////////////////////////////AUDIO-Array////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////   
void RenderAll(){
 readingsAll[399] = (a+b+c); 
 for(int z = 0; z < numReadingsAll-1 ; z++){
 readingsAll[z]=readingsAll[z+1];}
 indexAll = indexAll + 1;			  
  if (indexAll >= numReadingsAll)		  
    indexAll = 0;   
    
   
}

void Render1(){
 readings1[399] = a; 
  for(int z = 0; z < numReadings1-1 ; z++){
  readings1[z]=readings1[z+1];}
  index1 = index1 + 1;			  
  if (index1 >= numReadings1)		  
  index1 = 0;   
   
}
 void Render2(){
readings2[399] = b; 
  for(int z = 0; z < numReadings2-1 ; z++){
  readings2[z]=readings2[z+1];}
  index2 = index2 + 1;			  
  if (index2 >= numReadings2)		  
    index2 = 0;   
     
}	
	 
void Render3(){
  readings3[399] = c; 
  for(int z = 0; z < numReadings3-1 ; z++){
  readings3[z]=readings3[z+1];}
  index3 = index3 + 1;			  
  if (index3 >= numReadings3)		  
    index3 = 0;   
     
}
/////////////////////////////////DRAW-WAVE-FORM's///////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////
  int ctid = controlP5.window(this).currentTab().id();

  if(ctid == 5) {
    stroke(150,150,0);
  line(20,height-avgAll,width,height-avgAll);
  noFill();
  stroke(255,255,0);
    beginShape();
     for(int t = 0; t < numReadingsAll-1 ; t++){
	vertex(t,height- (readingsAll[t+1])*Volume);
}
endShape();
  } else if (ctid==2) {
   stroke(150,0,0);
  line(20,height-avg1,width,height-avg1);
  noFill(); 
     stroke(255,0,0);
	beginShape();
	for(int t = 0; t < numReadings1-1 ; t++){
     vertex(t,height- (readings1[t+1])*Volume);
  }
 endShape();
  } else if (ctid==3) {
    stroke(0,150,0);
  line(20,height-avg2,width,height-avg2);
  noFill(); 
	stroke(0,255,0);
	beginShape();
	for(int t = 0; t < numReadings2-1 ; t++){
	  vertex(t,height- (readings2[t+1])*Volume);
  }
 endShape();
} else if (ctid==4) {
 stroke(0,0,150);
  line(20,height-avg3,width,height-avg3);
  noFill(); 
	stroke(0,0,255);
	beginShape();
	for(int t = 0; t < numReadings3-1 ; t++){
	 vertex(t,height- (readings3[t+1])*Volume);
  }
 endShape();
}


regards maik
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