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TouchOSC and Processing Accelerometer Example Code

/ Published in: Java
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Playing with my iPhone and Processing v1 on the train last night I started messing with TouchOSC and thought that this super simple (and fairly rough) example code using the oscP5 library may help someone on their way to interactive wobbly nirvana.

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  1. import processing.opengl.*;
  2. import oscP5.*;
  3.  
  4. OscP5 oscP5;
  5.  
  6. float xrot = 0;
  7. float zrot = 0;
  8.  
  9. float xrot_targ = 0;
  10. float zrot_targ = 0;
  11. float orientation = 0;
  12.  
  13. float dampSpeed = 5;
  14.  
  15. void setup() {
  16.   size(400,400, OPENGL);
  17.   oscP5 = new OscP5(this,8000);
  18.   smooth();
  19. }
  20.  
  21. void draw() {
  22.   camera(  0, 0, 300,
  23.          0, 0, 0,
  24.          0.0, 1.0, 0.0
  25.      );
  26.   background(0); 
  27.  
  28.   // Basic value smoothing
  29.  
  30.   if (xrot_targ > xrot) {
  31.     xrot = xrot + ((xrot_targ - xrot) / dampSpeed);
  32.   } else {
  33.     xrot = xrot - ((xrot - xrot_targ) / dampSpeed);
  34.   }
  35.  
  36.   if (zrot_targ > zrot) {
  37.     zrot = zrot + ((zrot_targ - zrot) / dampSpeed);
  38.   } else {
  39.     zrot = zrot - ((zrot - zrot_targ) / dampSpeed);
  40.   }
  41.  
  42.  // Detection for if the iPhone is upsidedown or not
  43.  
  44.   if (orientation < 0) {
  45.     fill(255,0,0);
  46.     rotateX(radians(xrot));
  47.     rotateZ(radians(zrot));
  48.   } else {
  49.     fill(255,255,0);
  50.     rotateX(radians(xrot*-1));
  51.     rotateZ(radians(zrot*-1));
  52.   }
  53.   box(130,10,60);
  54.  
  55. }
  56.  
  57. void oscEvent(OscMessage theOscMessage) {
  58.   if(theOscMessage.checkAddrPattern("/accxyz")==true) {
  59.       xrot_targ = (theOscMessage.get(0).floatValue()*90);
  60.       zrot_targ = (theOscMessage.get(1).floatValue()*90)*-1;
  61.       orientation = theOscMessage.get(2).floatValue();
  62.   }
  63. }

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