2019-11-04

自画像

代码

分为人物，背景，雪花（设计鼠标左键点击下雪和停止下雪）

背景分为山和落下的太阳

let snowflakes = [];

let sun_y=200

let issnow=true;

function setup() {

  createCanvas(700, 500);

}

function draw() {

  background(135,206,250);

//太阳落山

   push();

     sun_y += 1

    if(sun_y==200){

        sun_y=1

    }

//绘制一个太阳

    fill(255,0,0)

    stroke(255, 255, 0)

    strokeWeight(6)

    ellipse(500, sun_y, 100, 100)

//开始绘制山的图形

//设置颜色为灰色

    fill(45,45,45)

    stroke(0, 0, 0)

    strokeWeight(1)

    beginShape()

    vertex(0,520)

    vertex(50, 340)

    vertex(120, 480)

    vertex(150, 320)

    vertex(200, 450)

    vertex(260, 350)

    vertex(400, 460)

    vertex(600, 310)

    vertex(800, 520)

//结束绘制图形

    endShape()

    pop();

  push();

//头发

  push();

  fill(54,54,54);

  stroke(54,54,54);

  rect(90,160,220,200);

  pop();

//身体

  push();

  fill(171,130,225);

  triangle(200,150,120,450,280,450);

  pop();

  push();

  fill(255,228,196);

ellipse(200,200,180,180);//绘制椭圆(x,y,宽,高)

  pop();

  push();

line(125,150,200,150);//绘制线段(x1,y1,x2,y2)起点至终点

line(200,150,230,115);//绘制线段(x1,y1,x2,y2)起点至终点

line(230,115,250,150);//绘制线段(x1,y1,x2,y2)起点至终点

line(250,150,275,150);//绘制线段(x1,y1,x2,y2)起点至终点

   pop();

//眼睛

    push();

    ellipse(150,200,30,30);

    ellipse(250,200,30,30);

    pop();

//眼球

    push();

    fill(0,0,0);

    ellipse(150,200,10,10);

    ellipse(250,200,10,10);

    pop();

//眉毛

line(130,175,170,175);//绘制线段(x1,y1,x2,y2)起点至终点

    line(230,175,270,175);

  push();

  fill(54,54,54);

  arc(200,160,220,130,PI,0);

  pop();

    fill(88,87,86);

arc(150, 175, 40, 15, PI, 0);//绘制弧(x,y,宽,高,起始角度,终止角度)

    arc(250, 175, 40, 15, PI, 0);

  pop();

//嘴巴

  line(175,240,225,240);

  arc(200, 240, 50, 40, 0, PI);

//手脚

  line(150,450,130,500);

  line(250,450,270,500);

  line(100,300,150,340);

  line(300,300,250,340);

  push();

 strokeWeight(3);

  line(270,500,280,490);

  line(130,500,145,505);

  pop();

   push();

  strokeWeight(2);

  stroke(171,130,225);

  line(250,158,260,135);

  line(260,158,270,140);

  pop();

//下雪

 push();

  noStroke();

 let t = frameCount / 60;

  if (mouseIsPressed === true)

  {

    if(mouseButton === LEFT)

    {

      if(issnow===false)

      issnow=true;

      else

      issnow=false;

    }

  }

  if(issnow===true)

  {

    for (var i = 0; i < random(5); i++)

    {

      snowflakes.push(new snowflake());

    }

    for (let flake of snowflakes)

    {

      flake.update(t);

      flake.display();  

    }

  }

  pop();

}

function snowflake() {

  // initialize coordinates

  this.posX = 0;

  this.posY = random(-50, 0);

  this.initialangle = random(0, 2 * PI);

  this.size = random(2, 5);

  // radius of snowflake spiral

  // chosen so the snowflakes are uniformly spread out in area

  this.radius = sqrt(random(pow(width / 2, 2)));

  this.update = function(time) {

    // x position follows a circle

    let w = 0.6; // angular speed

    let angle = w * time + this.initialangle;

    this.posX = width / 2 + this.radius * sin(angle);

    // different size snowflakes fall at slightly different y speeds

    this.posY += pow(this.size, 0.5);

    // delete snowflake if past end of screen

    if (this.posY > height) {

      let index = snowflakes.indexOf(this);

      snowflakes.splice(index, 1);

    }

  };

  this.display = function() {

    ellipse(this.posX, this.posY, this.size);

  };

}

人物设计的比较大是因为人物是主体（虽然丑）

太阳是美好的事物，雪花也是美好的事物，夕阳西下也不会带走美好，还会有新的美好在等你大概就是这个意思