class PaperDoll { 

  static final int HEAD=0;
  static final int NECK=1;
  static final int LEFT_SHOULDER=2; 
  static final int LEFT_ELBOW=3; 
  static final int LEFT_HAND=4; 
  static final int RIGHT_SHOULDER=5; 
  static final int RIGHT_ELBOW=6; 
  static final int RIGHT_HAND=7; 
  static final int LEFT_HIP=8;
  static final int LEFT_KNEE=9;
  static final int LEFT_FOOT=10;
  static final int RIGHT_HIP=11;
  static final int RIGHT_KNEE=12;
  static final int RIGHT_FOOT=13;

  static final int numSegments = 2;
  static final int numLimbs=4;

  float[][] x = new float[numLimbs][numSegments];
  float[][] y = new float[numLimbs][numSegments];
  //float[][]  = new PVector[numLimbs][numSegments];

  float[][] angle = new float[numLimbs][numSegments];
  float[][] len = new float[numLimbs][numSegments];

  float segLength = 100;

  float targetX, targetY;

PImage bodyTextures[] = new PImage[11];




  PaperDoll() {
  }

  void constrainCoords(float sx[], float sy[]) {
    // left shoulder
    //    x[0][1]=screenCoords[LEFT_SHOULDER].x;
    //    x[1][1]=screenCoords[RIGHT_SHOULDER].x;
    //    x[2][1]=screenCoords[LEFT_HIP].x;
    //    x[3][1]=screenCoords[RIGHT_HIP].x;
    //    
    //    x[0][1]=screenCoords[LEFT_SHOULDER];
    //    x[1][1]=screenCoords[RIGHT_SHOULDER];
    //    x[2][1]=screenCoords[LEFT_HIP];
    //    x[3][1]=screenCoords[RIGHT_HIP];

    x[0][1]=sx[LEFT_SHOULDER];
    y[0][1]=sy[LEFT_SHOULDER];
    x[1][1]=sx[RIGHT_SHOULDER];
    y[1][1]=sy[RIGHT_SHOULDER];
    x[2][1]=sx[LEFT_HIP];
    y[2][1]=sy[LEFT_HIP];
    x[3][1]=sx[RIGHT_HIP];
    y[3][1]=sy[RIGHT_HIP];

    reachSegment(0, 0, sx[LEFT_HAND], sy[LEFT_HAND]);
    reachSegment(0, 1, targetX, targetY);
    
    reachSegment(1, 0, sx[RIGHT_HAND], sy[RIGHT_HAND]);
    reachSegment(1, 1, targetX, targetY);

    reachSegment(2, 0, sx[LEFT_FOOT], sy[LEFT_FOOT]);
    reachSegment(2, 1, targetX, targetY);

    reachSegment(3, 0, sx[RIGHT_FOOT], sy[RIGHT_FOOT]);
    reachSegment(3, 1, targetX, targetY);

    for (int j=0; j<numLimbs; j++)
      for (int i=x[j].length-1; i>=1; i--)
        positionSegment(j, i, i-1);
  }

  void reachSegment(int l, int i, float xin, float yin) {
    float dx = xin - x[l][i];
    float dy = yin - y[l][i];
    angle[l][i] = atan2(dy, dx);  
    targetX = xin - cos(angle[l][i]) * len[l][i];//segLength;
    targetY = yin - sin(angle[l][i]) * len[l][i];//segLength;
  }

  void positionSegment(int l, int a, int b) {
    x[l][b] = x[l][a] + cos(angle[l][a]) * len[l][a];//segLength;
    y[l][b] = y[l][a] + sin(angle[l][a]) * len[l][a];//segLength;
  }


  void drawDoll() {
    for (int j=0; j<numLimbs; j++)
      for (int i=0; i<x[j].length; i++) {
        drawSegment(j, i, x[j][i], y[j][i], angle[j][i], (i+1)*2);
      }
  }

  void drawSegment(int j, int i, float x, float y, float a, float sw) {
    strokeWeight(sw);
    //pushMatrix();
    //translate(x, y, 0);
    //rotateZ(a);
    //line(0, 0, 0, len[j][i], 0, 0);
    //line(0, 0, segLength, 0);
    line(x, y, 0.0, x+len[j][i]*cos(a), y+len[j][i]*sin(a), 0);
    
    //popMatrix();
  }
  
  void loadBodyTextures() {
  String basepath = "/Users/rtwomey/Pictures/kpuppet/rauschenberg_";

  bodyTextures[HEAD_NECK]=loadImage(basepath+"HEAD_NECK.jpg");
  bodyTextures[LEFT_SHOULDER_LEFT_ELBOW]=loadImage(basepath+"LEFT_SHOULDER_LEFT_ELBOW.jpg"); 
  bodyTextures[LEFT_ELBOW_LEFT_HAND]=loadImage(basepath+"LEFT_ELBOW_LEFT_HAND.jpg");
  bodyTextures[LEFT_HIP_LEFT_KNEE]=loadImage(basepath+"LEFT_HIP_LEFT_KNEE.jpg");
  bodyTextures[LEFT_KNEE_LEFT_FOOT]=loadImage(basepath+"LEFT_KNEE_LEFT_FOOT.jpg");
  bodyTextures[RIGHT_SHOULDER_RIGHT_ELBOW]=loadImage(basepath+"RIGHT_SHOULDER_RIGHT_ELBOW.jpg"); 
  bodyTextures[RIGHT_ELBOW_RIGHT_HAND]=loadImage(basepath+"RIGHT_ELBOW_RIGHT_HAND.jpg");
  bodyTextures[RIGHT_HIP_RIGHT_KNEE]=loadImage(basepath+"RIGHT_HIP_RIGHT_KNEE.jpg");
  bodyTextures[RIGHT_KNEE_RIGHT_FOOT]=loadImage(basepath+"RIGHT_KNEE_RIGHT_FOOT.jpg");
  bodyTextures[SHOULDERS_HIPS]=loadImage(basepath+"SHOULDERS_HIPS.jpg");
  bodyTextures[LEFT_HIP_RIGHT_HIP]=loadImage(basepath+"LEFT_HIP_RIGHT_HIP.jpg");

  println("done loading body textures.");
  
  float sf=0.3;
  len[0][1]=bodyTextures[LEFT_SHOULDER_LEFT_ELBOW].height*sf;
  len[1][1]=bodyTextures[RIGHT_SHOULDER_RIGHT_ELBOW].height*sf;
  len[0][0]=bodyTextures[LEFT_ELBOW_LEFT_HAND].height*sf;
  len[1][0]=bodyTextures[RIGHT_ELBOW_RIGHT_HAND].height*sf;
  len[2][1]=bodyTextures[LEFT_HIP_LEFT_KNEE].height*sf;
  len[3][1]=bodyTextures[RIGHT_HIP_RIGHT_KNEE].height*sf;
  len[2][0]=bodyTextures[LEFT_KNEE_LEFT_FOOT].height*sf;
  len[3][0]=bodyTextures[RIGHT_KNEE_RIGHT_FOOT].height*sf;
}


}