I really want to send a bunch of flowers

demonstration

Technology stack

This time, we used a name p5.js Framework ：

p5.js
It's a JavaScript Function library , It was made with Processing Have the same goal . Is to let artists , The designer , Educators and beginners of programming can easily , It's easy to learn and use programming . And it can also bring some new things to the current web page

Its structure ：

 // initialization , Only run once 
 function setup () {
    }
 <br />
 // Drawing graphics , Read every frame 
 function draw() {
    }

A small case

function setup() {
    
  createCanvas(400, 400);
}
function draw() {
    
  if(mouseIsPressed){
    
    stroke(220);
  }else{
    
    stroke(0);
  }
  line(300,300,mouseX,mouseY);
}

The effect is this

Source code

css

* {
     margin:0; padding:0; } 
html, body {
     width:100%; height:100%; overflow: hidden; background:black;} 
canvas {
     display:block; }
#controls {
    
  z-index: 2;
  margin: 20px;
  position: absolute;
  top: 0; left: 0;
  color: white;
}

js

let size = 150;

class Flower{
    
  constructor(s, a1, a2){
    
    let l = pow(random(), 2)*size;
    let l2 = random();
    this.l2 = l2;
    this.x = cos(a1)*(l + l2*size/2);
    this.y = sin(a1)*(l + l2*size/2);
    
    this.hue = random();
    
    this.goalX = this.x;
    this.goalY = this.y;
    
    this.dx = 10;
    this.dy = 10;
    
    this.s = s*(l2*.5 + .5);
    this.a = a1;
    this.squash = 1 - (l/size)*.8;
    this.weights = [];
    for (let i = 0; i < 5; i++){
    
      this.weights[i] = random()*.5 + .5;
    }
  }
  update(){
    
    this.x += this.dx;
    this.y += this.dy;
    
    this.dx *= .95;
    this.dy *= .95;
    
    let mx = (width/2 + this.x) - mouseX;
    let my = (height/2 + this.y) - mouseY;
   
    let d = dist(width/2 + this.x, height/2 + this.y, mouseX, mouseY);
    let a = atan2(my, mx);
    
    if (d > 1){
    
      this.dx += cos(a)*size/d;
      this.dy += sin(a)*size/d;
    }
    
    this.x = (this.goalX + this.x)/2;
    this.y = (this.goalY + this.y)/2;
  }
  renderStem(){
    
    pushPop(() => {
    
      noFill();
      strokeWeight(this.l2*2 + 1);
      stroke(.35, 1, this.l2*.5 + .5);
      translate(this.x, size);
      let a = PI;
      if (this.x <= 0) a += PI/2;
      arc(0, 0, this.x*2, (this.y)*2 - size*2, a, a+PI/2);
    })
  }
  render(){
    
    pushPop(() => {
    
      noStroke();
      fill(this.l2*.2 + .8);
      translate(this.x, this.y);
      rotate(this.a);
      scale(this.s*this.squash, this.s);
      
      for (let j = 0; j < 2; j++)
      for (let i = 0; i < 5; i++){
    
        let a = i*TAU/5;
        let s = this.weights[i];
        let b = (this.l2*.2 + .8)*(s*.1 + .9)
        fill(this.hue, .1*this.l2, b);
        if (j == 0){
    
          s += .05;
          fill(0);
        }
        ellipse(cos(a)*.7*s, sin(a)*.7*s, 1);
      }
      fill(0);
      ellipse(0, 0, .7*(this.weights[0] + .05));
      fill(.15, 1, 1*(this.l2*.2 + .8));
      ellipse(0, 0, .7*this.weights[0]);
    })
  }
}

function setup (){
    
  pixelDensity(1);
  createCanvas();
  colorMode(HSB, 1, 1, 1);
  windowResized();
}

function init(){
    
  flowers = [];
  for (let i = 0; i < 50; i++){
    
    flowers.push(
      new Flower(random(20) + 20, random(PI*.8) + PI + PI*.1)
    );
  }
  flowers = flowers.sort((a, b) => a.s - b.s);
}

function draw(){
    
  background(0);
  translate(width/2, height/2);
  flowers.map(f => f.update());
  flowers.map(f => f.renderStem());
  flowers.map(f => f.render());
}

function windowResized(){
    
  resizeCanvas(windowWidth, windowHeight); 
  init();
}

let pushPop = f => {
    push();f();pop();}

Click to get the information directly

If you are learning python perhaps Java Even if it is C If you have any problems, you can leave me a message , Because in the early stage of learning, novices always take many detours , At this time, if there is no one to help, it is easy to give up . There are many such examples around. Many people change their majors and directions as they learn , Not only their own problems, but also the lack of correct learning . So as a passer-by, I hope to leave a message to me if you have any questions , It's not help, it's just a matter of typing a few lines easily .

Here you are python,Java Learning materials and interesting programming projects , More difficult to find resources . Anyway, it's not a loss to see .