how to draw oval use point function and the center of the oval can be set

ATC243750496

thanks in advance!

REAS

Please explain in more detail. I can't understand the question.

ATC243750496

here is the main code and the problem i have

import processing.opengl.*;
int leth=100,star_size=1;
float x[]=new float[leth],y[]=new float[leth];
float angle=0.0,step=2*PI/360,round_a=5,round_b=4,terminate=0;
void setup(){
  size(900,600,OPENGL);
  background(0);
  smooth(8);
  noStroke();
  rdm();
}

void draw(){
  color blk=color(0,0,0);
  color blu=color(100,255,252);
  int size=100;
  float number=0.01;
  color change=lerpColor(blk,blu,0);
  clear();
  for(int i=0;i<100;i++){
    if(number<=1){
      change=lerpColor(blk,blu,number);
      number=number+0.01;
      fill(change,30);
     }
  else{
    fill(blu,30);
  }
  if(size>0){
  ellipse(300,200,size,size);
  }
  size=size-1;
  }
  rotte();
  star();
}

void rdm(){
  for(int i=0;i<leth;i++){
    x[i]=int(random(0,900));
    y[i]=int(random(0,600));
  }
}

void star(){
  color blc=color(0,0,0);
  color org=color(255,252,45);
  float size_1=5.0,size_2=5.0;
  float number;
  color change;
  for(int i=0;i<leth;i++){
    if(x[i]>=0&&x[i]<300){
      if(y[i]>=0&&y[i]<200){size_1=7;}
      else if(y[i]>=200&&y[i]<400){size_1=9;}
      else if(y[i]>=400&&y[i]<=600){size_1=11;}
    }
    else if(x[i]>=300&&x[i]<600){
      if(y[i]>=0&&y[i]<200){size_1=5;}
      else if(y[i]>=200&&y[i]<400){size_1=9;}
      else if(y[i]>=400&&y[i]<=600){size_1=13;}
    }
    else if(x[i]>=600&&y[i]<=900){
      if(y[i]>=0&&y[i]<200){size_1=7;}
      else if(y[i]>=200&&y[i]<400){size_1=9;}
      else if(y[i]>=400&&y[i]<=600){size_1=11;}
    }
    size_2=size_1;
    number=1/size_1;
    for(int j=0;j<size_1;j++){
      if(number<=1){
        change=lerpColor(blc,org,number);
        number=number+1/size_1;
        fill(change,30);
      }
      else{
        fill(org);
      }
      if(size_2>0){
      ellipse(x[i],y[i],size_2,size_2);
      }
     size_2=size_2-1;
    }
  }
}

void rotte(){//here i want the star to rotate with the center of the main star with oval orbit but i  dont
//know how to
  int i;
  if(terminate>=360){terminate=0;}
  for(i=0;i<leth;i++){  
    x[i]=x[i]+round_a*cos(angle);
    y[i]=y[i]+round_b*sin(angle);
  }
  angle+=step;
  terminate++;
}

ATC243750496

all star move with the center of the main star not each one has its center

ATC243750496

or if still cant how to make one star move with the center that can be set?

import processing.opengl.*;
int leth=100,star_size=1;
float x[]=new float[leth],y[]=new float[leth];
float angle=0.0,step=2*PI/360,round_a=20,round_b=20,center_X=1,center_Y=1,terminate=0;
void setup(){
  size(900,600,OPENGL);
  background(0);
  smooth(8);
  noStroke();
  rdm();
}

void draw(){
  color blk=color(0,0,0);
  color blu=color(100,255,252);
  int size=100;
  float number=0.01;
  color change=lerpColor(blk,blu,0);
  clear();
  for(int i=0;i<100;i++){
    if(number<=1){
      change=lerpColor(blk,blu,number);
      number=number+0.01;
      fill(change,30);
     }
  else{
    fill(blu,30);
  }
  if(size>0){
  ellipse(300,200,size,size);
  }
  size=size-1;
  }
  rotte();
  star();
}

void rdm(){
  for(int i=0;i<leth;i++){
    x[i]=int(random(0,900));
    y[i]=int(random(0,600));
  }
}

void star(){
  color blc=color(0,0,0);
  color org=color(255,252,45);
  float size_1=5.0,size_2=5.0;
  float number;
  color change;
  for(int i=0;i<leth;i++){
    if(x[i]>=0&&x[i]<300){
      if(y[i]>=0&&y[i]<200){size_1=7;}
      else if(y[i]>=200&&y[i]<400){size_1=9;}
      else if(y[i]>=400&&y[i]<=600){size_1=11;}
    }
    else if(x[i]>=300&&x[i]<600){
      if(y[i]>=0&&y[i]<200){size_1=5;}
      else if(y[i]>=200&&y[i]<400){size_1=9;}
      else if(y[i]>=400&&y[i]<=600){size_1=13;}
    }
    else if(x[i]>=600&&y[i]<=900){
      if(y[i]>=0&&y[i]<200){size_1=7;}
      else if(y[i]>=200&&y[i]<400){size_1=9;}
      else if(y[i]>=400&&y[i]<=600){size_1=11;}
    }
    size_2=size_1;
    number=1/size_1;
    for(int j=0;j<size_1;j++){
      if(number<=1){
        change=lerpColor(blc,org,number);
        number=number+1/size_1;
        fill(change,30);
      }
      else{
        fill(org);
      }
      if(size_2>0){
      ellipse(x[i],y[i],size_2,size_2);
      }
     size_2=size_2-1;
    }
  }
}

void rotte(){
  int i;
  if(terminate>=360){terminate=0;}
  for(i=0;i<1;i++){  
    x[i]=center_X+x[i]+round_a*cos(angle);
    y[i]=center_Y+y[i]+round_b*sin(angle);
  }
  angle+=step;
  terminate++;
}

here i change to move only one star but still the center is not the main star

Mushussu

The center of the ellipse is (width / 2, height / 2) :

size(400, 400);
translate(width / 2, height / 2);
for (float i = 0; i < TWO_PI; i += PI / 40) {
  point(120 * cos(i), 80 * sin(i));
}