linkedIn live poster

int amount = 500;
int []  a= new int[amount];
int []  b= new int[amount];
int []  d= new int[amount];

int t;




void setup(){
  size(1024, 768,P3D);
  background(0);
  noFill();
  stroke(255);
t = 5;
 point();// must write here and write void point below 
 
}

void draw(){
  background(0);
  pushMatrix();
  translate(width/2,height/2+500);
  rotateY(frameCount/1000.0);// translate rate 
 
  for(int i = 0; i<amount; i++){//for loop, when i is smaller than amount i plus one in one time
    point(a[i],b[i],d[i]);// position x,y,z
 strokeWeight(random(1,3));// bian kuang cu xi, this is the bian kuang of point, which means the size of star. 
 

 
  }
   strokeWeight(1);
   speedS = 5;
   sphere(500);
    
  
  popMatrix();
  delay(10);
}

void point (){
  strokeWeight(t);
  for (int i = 0; i<amount; i++){
    a[i] = int(random(-800,800));
    b[i] = int(random(-800,300));
    d[i] = int(random(-800,800));
   
  }
}

 

Add a gradient background

int amount = 1000;
int [] a = new int[amount];
int [] b = new int[amount];
int [] d = new int[amount];
void setup(){
  size(1000,1000,P3D);
  noFill();
  stroke(255);
  point();
  //line();
}

void draw(){
   pushMatrix();
   stroke(255);
  translate(width/2,height/2+500);
  rotateY(frameCount/300.0);
  strokeWeight(1);
  sphere(500);
  for (int j = 0; j<amount; j++){
    point(a[j],b[j],d[j]);
    strokeWeight(random(1,3));
  }
  popMatrix();
  
  color from = color(0);
  color to = color(#150D6C);
  
  for (int i = 0; i<height;i++){
    float amt = map(i,0,height,0,1);
    color c = lerpColor(from, to, amt);
    stroke(c);
    line(0,i,height,i);
  } 
}

void point(){
  for (int j = 0; j<amount;j++){
    a[j] = int(random(-800,800));
    b[j] = int(random(-800,300));
    d[j] = int(random(-800,800));
}
}

 遇到和之前差不多的问题不过这次很快就解决了

改动一个地方（比如说之改动背景颜色怎么不让这个改动到别的地方 比如同时改动了球的颜色）

解决办法：for loop弄混了 如果不同的array变量要用不同的字母（i，j…) 分别写一个for loop并且括号分开 不为包含关系