p5.js实现斐波那契螺旋的示例代码

var Fibonacci = [];

function setup(){ createCanvas(windowWidth, windowHeight);//创建一块画板，画板的宽高与浏览器宽高相同 background(255);//设置背景颜色为白色 frameRate(10);//设置每秒10帧}

function draw(){ ... stroke(0);//线条颜色为黑色 noFill();//无填充色 strokeWeight(5);//线条宽度为5 translate(windowWidth/2, windowHeight/2);//将坐标系移动到页面中央 ...}

function draw(){ ... stroke(0); noFill(); strokeWeight(5); translate(windowWidth/2, windowHeight/2); ... for( var i = 0; i < 20; i ++){//绘制20段90度弧线  var a = i <= 1 ? 1 : Fibonacci[i-1] + Fibonacci[i-2];//这是条件表达式，如果i等于0或1，那么a等于1；否则等于斐波那契数列前两项的和  Fibonacci.push(a);//将新得到的a加入斐波那契数列中  arc(0,0,a * 2,a * 2,0,PI / 2);//绘制圆心在(0,0)直径为2*a度数为90度的弧形  /**********以下是为下一段弧线做准备************/  rotate(PI / 2);//将坐标系按顺时针旋转90度  translate(-Fibonacci[i-1],0); //将坐标系沿着X轴反向移动上一项的长度 } }

function draw(){ background(255);//将背景设置成白色，“遮盖”之前的绘图 stroke(0); noFill(); strokeWeight(5); translate(windowWidth/2, windowHeight/2); rotate(-PI / 6 * frameCount);//每帧旋转30度，frameCount表示当前已播放帧数 for( var i = 0; i < 20; i ++){  var a = i <= 1 ? 1 : Fibonacci[i-1] + Fibonacci[i-2];  Fibonacci.push(a);  arc(0,0,a * 2,a * 2,0,PI / 2);  rotate(PI / 2);  translate(-Fibonacci[i-1],0);  } }

var Fibonacci = [];function setup(){ createCanvas(windowWidth, windowHeight); background(255); frameRate(10);}function draw(){ background(255); stroke(0); noFill(); strokeWeight(5); translate(windowWidth/2, windowHeight/2); rotate(-PI / 6 * frameCount); for( var i = 0; i < 20; i ++){  var a = i <= 1 ? 1 : Fibonacci[i-1] + Fibonacci[i-2];  Fibonacci.push(a);  arc(0,0,a * 2,a * 2,0,PI / 2);  rotate(PI / 2);  translate(-Fibonacci[i-1],0);  } }function windowResized(){ resizeCanvas(windowWidth, windowHeight);}