gistfile1.txt

Location[] points = new Location[20];
int myX, myY, myZ;
int radius = 100;

void setup() {
  size( 640, 640, P3D);
  //frameRate(25);
  createPoints();
  noFill();
  strokeWeight( 1 );
  smooth();
}

void draw() {
  background(110);
  
  translate(width/2, height/2, 300);
  float t = millis()/10000.0f;
  rotateY(t);
  
  //stroke( 0, 0, 0, 60 );
  stroke(149,248,168,20);
  
  sphere( 90 );
  
  for(int i = 0; i <= points.length-1; i++) {
    pushMatrix();
    translate(points[i].v.x, points[i].v.y, points[i].v.z);
    noFill();
    stroke( points[i].c );
    sphere( points[i].r );
    popMatrix();
    points[i].update();
  }
  
  stroke( 0 );
  //line( points[0].v.x, points[0].v.y, points[0].v.z, points[1].v.x, points[1].v.y, points[1].v.z );
  for( int i = 0; i < 19; i++ ) {
    tracerArc( points[i].v, points[i+1].v );
    //tracerArc( points[1].v, points[2].v );
  }
}

public PVector comb(float a, PVector v1,float b, PVector v2) {
  float  rx =a* v1.x + b*v2.x;
  float ry =a* v1.y + b*v2.y;
  float rz =a* v1.z + b*v2.z;
  return new PVector(rx,ry,rz);
}

//public void comb(float a,Vecteur v1,float b, Vecteur v2,float c,Vecteur v3) {
//  float  rx =a* v1.x + b*v2.x+c*v3.x;
//  float ry =a* v1.y + b*v2.y+c*v3.y;
//  float rz =a* v1.z + b*v2.z+c*v3.z;
//  return new Vecteur(rx,ry,rz);
//} 

public void tracerArc(PVector v1, PVector v2) {
  PVector v = new PVector();
  PVector vLast = new PVector(); 
  float angle=(float)Math.acos(v2.dot(v1)/v2.dot(v2));
  for( float t=0; t<=1; t+=0.02f ) {
    v = comb(sin((1-t)*angle)/sin(angle),v1,sin(t*angle)/sin(angle),v2);
    if( t==0 ) {
      line(v1.x, v1.y, v1.z, v.x, v.y, v.z);
    } else {
      line(vLast.x, vLast.y, vLast.z, v.x, v.y, v.z);
    }
    vLast = v;
  }
  line(vLast.x, vLast.y, vLast.z, v2.x, v2.y, v2.z);
}

void createPoints() {
  for(int i = 0; i <= points.length-1; i++) {
    float angleA = random(0, TWO_PI);
    float angleB = random(0, TWO_PI);
      
    myX = int(radius*sin(angleA)*cos(angleB));
    myY = int(radius*sin(angleA)*sin(angleB));
    myZ = int(radius*cos(angleA));
    
    points[i] = new Location (myX, myY, myZ, angleA, angleB, i);
  }
}

void mouseMoved() {
  for(int i = 0; i <= points.length-1; i++) {
    points[i].test( mouseX, mouseY );
  }
}