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pakt02

See /f0blog/pact-februari/

//pakt02 missing dashed lines

int index, n;
PGraphics grad;

void setup() {
  size(640, 480, JAVA2D);
  frameRate(60);
  noFill();
  strokeWeight(1);
  smooth();
  index= 0;
  n= 50;
  grad= createGraphics(width, height, JAVA2D);
  grad.beginDraw();
  grad.background(0);
  createGradient(grad, width*0.5, height*0.5, width*2.0, color(0.5*255.0, 0.6*255.0, 0.7*255.0), color(0, 0, 0));
  grad.endDraw();

  stroke(255.0, 255.0, 0.0, 0.8*255.0);
}
void draw() {
  float x= 10.0+(sin(index*0.016)*2.0);
  float y= (height*0.5)+(sin(index*0.010)*50.0);
  float x3= width-10.0+(sin(index*0.012)*2.0);
  float y3= (height*0.5)+(sin(index*0.014)*50.0);
  float w= width*0.5;
  float h= height*0.5;
  float spread= map(sin(index*0.0005), -1.0, 1.0, 0.5, 1.5);

  image(grad, 0, 0);

  //double dashes[]= {sin(index*0.0023)*50.0+51.0, cos(index*0.0023)*50.0+51.0};
  //set dash here TODO
  for (int i= 0; i<n; i++) {
    float x1= map(sin(index*0.135+(i*spread)), -1.0, 1.0, 0.1, 0.5);
    float y1= cos((index+i)*0.130+(i*spread));
    float x2= map(sin(index*0.125+(i*spread)), -1.0, 1.0, 0.5, 0.9);
    float y2= cos((index+i)*0.120+(i*spread));
    bezier(x, y, x1*w+w, y1*h+h, x2*w+w, y2*h+h, x3, y3);
  }
  index++;
}
void createGradient(PGraphics ctx, float x, float y, float radius, color c1, color c2) {
  ctx.noStroke();
  for (float r= radius; r>=0.0; r--) {
    color col= lerpColor(c1, c2, r/radius);
    ctx.fill(col);
    ctx.ellipse(x, y, r, r);
  }
}