pakt05

//pakt05

int index, n;
PGraphics grad;

void setup() {
  size(640, 480, JAVA2D);
  frameRate(60);
  strokeWeight(1);
  smooth();
  index= 0;
  n= 100;
  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, 0.4*255.0, 0.3*255.0), color(0, 0, 0));
  grad.endDraw();

  stroke(255.0, 255.0, 255.0, 0.8*255.0);
}
void draw() {
  float x= width*0.5;
  float y= height*0.5;
  float w= width*0.3;
  float h= height*0.275;
  float spread= sin(index*0.0012)*20.0;
  float speed1= sin(index*0.0013)*0.001+0.005;
  float speed2= sin(index*0.0014)*0.001+0.0005;
  float speed3= sin(index*0.0015)*0.001+0.014;
  float speed4= sin(index*0.0016)*0.001+0.012;

  image(grad, 0, 0);

  for (int i= 0; i<n; i++) {
    float px= x+(sin((index*i*speed1))+sin(index*i*speed2)*w)-i;
    float py= y+sin((index+(i*spread))*speed3)*sin((index+i)*speed4)*h+i;
    line(px+(n-i), py+(i-n), px, py);
  }
  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);
  }
}