MidiVisualization/Key.pde at master · mistercrunch/MidiVisualization · GitHub

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/*
    MidiBalls: A 3d music visualization that uses midi as input
    Copyright (C) 2010 Maxime Beauchemin

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/*
Key as in key on a midi keyboard
*/
class Key
{
  int NoteNumber;
  ColorGL cgl;
  boolean isDown;
  Particle LatestParticle;
  Vect3d Pos;
  int LatestVelocity;

  Key(int iNoteNumber)
  {
    LatestVelocity=0;
    NoteNumber = iNoteNumber;
    AssignColor();

    Pos = new Vect3d();
  }

  void Push(int inVelocity)
  {
    isDown=true;
    if(!(LatestParticle==null))LatestParticle.isKeyPushed=false; //release old particle in case the noteoff message never happened
    LatestVelocity = inVelocity;
    Particle p = new Particle(Pos, cgl, true, inVelocity);
    Particles.add(p);
    LatestParticle=p;
  }
  void Release()
  {
    if (isDown)
    {
      isDown=false;
      LatestParticle.isKeyPushed=false;
    }
  }


  void AssignColor()
  {
    int NoteInScale = NoteNumber % 12;
    float fHue=0;
    //Assigning color based on consonance / dissonance
    switch (NoteInScale)
    {
      case 0:   fHue=  (float)0/12;   break;
      case 1:   fHue=  (float)7/12;   break;
      case 2:   fHue=  (float)2/12;  break;
      case 3:   fHue=  (float)9/12;   break;
      case 4:   fHue=  (float)4/12;   break;
      case 5:   fHue=  (float)11/12;   break;
      case 6:   fHue=  (float)6/12;   break;
      case 7:   fHue=  (float)1/12;  break;
      case 8:   fHue=  (float)8/12;   break;
      case 9:   fHue=  (float)3/12;   break;
      case 10:  fHue=  (float)10/12;   break;
      case 11:  fHue=  (float)5/12;   break;
    }

    color c = color(fHue, 1, 1);
    cgl = new ColorGL(c);
  }
  int NoteInScale()
 {
   return NoteNumber % 12;
 }
  String PitchLetter()
  {
    String S="";

    switch(NoteNumber % 12)
    {
      case 0: S = "C";break;
      case 1: S = "C#";break;
      case 2: S = "D";break;
      case 3: S = "Eb";break;
      case 4: S = "E";break;
      case 5: S = "F";break;
      case 6: S = "F#";break;
      case 7: S = "G";break;
      case 8: S = "Ab";break;
      case 9: S = "A";break;
      case 10: S = "Bb";break;
      case 11: S = "B";break;
    }

    return S;
  }
  int Octave()
  {
    return (int)NoteNumber/12;
  }
};