Favorite Processing functions

Favorites.pde

float getAngle(PVector p1, PVector p2){
  PVector a = PVector.sub(p2,p1);
  float aa = abs(degrees(atan2(a.x,a.y)) - 180);
  return aa;
}

String setOnOff(boolean _b){
  String s;
  if(_b){
    s = "ON";
  }else{
    s = "OFF";
  }
  return s;
}

String chooseFileDialog() {
  // requires import javax.swing.JFileChooser;
  String choosePath = "";
  JFileChooser chooser = new JFileChooser();
  chooser.setFileFilter(chooser.getAcceptAllFileFilter());
  int returnVal = chooser.showOpenDialog(null);
  if (returnVal == JFileChooser.APPROVE_OPTION) {
    try {
      //choosePath = "" + chooser.getSelectedFile().getName();
      choosePath = "" + chooser.getSelectedFile().getPath();
    }
    catch(Exception e) {
    }
  }
  return choosePath;
}

String zeroPadding(int _val, int _maxVal){
  String q = ""+_maxVal;
  return nf(_val,q.length());
}


void rotateXYZ(float _x, float _y, float _z){
  rotateX(radians(_x));
  rotateY(radians(_y));
  rotateZ(radians(_z));
}

float rounder(float _val, float _places){
  _val *= pow(10,_places);
  _val = round(_val);
  _val /= pow(10,_places);
  return _val;
}

//--

String rgbToHex(color c){
  return "#" + hex(c,6);
}

//-------------------------------

//gets the number of files in a folder

int countFolder(String path) {
  File dataFolder = new File(path);
  int numFiles = dataFolder.list();
  return numFiles;
}

//-------------------------------

//simplifies the unnecessarily complex blend command; image, x, y, width, height, center/corner

void blendImage(PImage bI, int pX, int pY, String b, boolean center) {
  String[] blendModes = { "BLEND", "ADD", "SUBTRACT", "LIGHTEST", "DARKEST", "DIFFERENCE", "EXCLUSION", "MULTIPLY", "SCREEN", "OVERLAY", "HARD_LIGHT", "SOFT_LIGHT", "DODGE", "BURN" };
  int[] blendModeCodes = { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192 };
  for(int i=0;i<blendModes.length;i++) {
    if(b==blendModes[i]) {
      int qX,qY;
      if(center) {
        qX=pX-(bI.width/2);
        qY=pY-(bI.height/2);
      } else {
        qX=pX;
        qY=pY;
      }
      blend(bI,0,0,bI.width,bI.height,qX,qY,bI.width,bI.height,blendModeCodes[i]);
    }
  }
}

//-------------------------------

  //Tween movement.  start, end, ease (more = slower).
  float tween(float v1, float v2, float e) {
    v1 += (v2-v1)/e;
    return v1;
  }

  PVector tween3D(PVector v1, PVector v2, PVector e) {
    v1.x += (v2.x-v1.x)/e.x;
    v1.y += (v2.y-v1.y)/e.y;
    v1.z += (v2.z-v1.z)/e.z;
    return v1;
  }
  
  float shake(float v1, float s) {
    v1 += random(s) - random(s);
    return v1;
  }

  float boundary(float v1, float vMin, float vMax) {
    if (v1<vMin) {
      v1 = vMin;
    } 
    else if (v1>vMax) {
      v1=vMax;
    } 
    return v1;
  }

  float gravity(float v1, float v2, float v3) { //y pos, floor num, gravity num
    if (v1<v2) {
      v1 += v3;
    }
    if (v1>v2) {
      v1 = v2;
    }
    return v1;
  }

//-------------------------------

//2D Hit Detect.  Assumes center.  x,y,w,h of object 1, x,y,w,h, of object 2.
boolean hitDetect(float x1, float y1, float w1, float h1, float x2, float y2, float w2, float h2) {
  w1 /= 2;
  h1 /= 2;
  w2 /= 2;
  h2 /= 2; 
  if(x1 + w1 >= x2 - w2 && x1 - w1 <= x2 + w2 && y1 + h1 >= y2 - h2 && y1 - h1 <= y2 + h2) {
    return true;
  } 
  else {
    return false;
  }
}

    //3D Hit Detect.  Assumes center.  xyz, whd of object 1, xyz, whd of object 2.
  boolean hitDetect3D(PVector p1, PVector s1, PVector p2, PVector s2) {
    s1.x /= 2;
    s1.y /= 2;
    s1.z /= 2;
    s2.x /= 2;
    s2.y /= 2; 
    s2.z /= 2; 
    if (  p1.x + s1.x >= p2.x - s2.x && 
          p1.x - s1.x <= p2.x + s2.x && 
          p1.y + s1.y >= p2.y - s2.y && 
          p1.y - s1.y <= p2.y + s2.y &&
          p1.z + s1.z >= p2.z - s2.z && 
          p1.z - s1.z <= p2.z + s2.z
      ) {
      return true;
    } 
    else {
      return false;
    }
  }

//-------------------------------
float angle(float x1, float y1, float x2, float y2) {
  return tan(abs(x1-x2)/abs(y1-y2));
}
//-------------------------------


//Easy randomizer.  range,threshold
boolean rollDice(float v1, float v2) {
  float rollDiceNum;
  rollDiceNum = random(v1);
  if(rollDiceNum<v2) {
    return true;
  }
  else {
    return false;
  }
}

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