如何使用 p5 创建多个画布? [英] How to create more than one canvas with p5?

问题描述

我想尝试一些 3 维立体透视，我需要 2 个画布，但我什么也没找到.

我尝试使用 canvas1.background(200);

函数设置() {让 canvas1 = createCanvas(100, 100);canvas1.position(0,0);}函数绘制(){//对于画布1背景(100)；旋转X(帧计数* 0.01)；旋转Z(帧计数* 0.01)；锥体(30, 50);}功能设置(){让 canvas2 = createCanvas(100, 100);canvas2.position(100,0);}函数绘制(){//对于画布2背景(100)；旋转X(帧计数* 0.01)；旋转Z(帧计数* 0.02)；锥体(30, 50);}

解决方案

要使用多个画布，您需要使用 实例模式

与您的代码的主要区别在于，每组 p5.js 方法都将位于一个函数内部，并且所有对 p5.js 方法的调用都需要由传递给该函数的 p5 实例调用.

var s1 = function( sketch ) {草图.setup = 函数(){让 canvas1 = sketch.createCanvas(100, 100, sketch.WEBGL);canvas1.position(0,0);}草图.绘制 = 函数(){//对于画布1草图背景(100)；Sketch.rotateX(sketch.frameCount * 0.01);Sketch.rotateZ(sketch.frameCount * 0.01);Sketch.cone(30, 50);}};//创建 p5 的新实例并传入草图 1 的函数新的 p5(s1);var s2 = 函数(草图){草图.setup = 函数(){让 canvas2 = sketch.createCanvas(100, 100, sketch.WEBGL);canvas2.position(100,0);}草图.绘制 = 函数(){//对于画布2草图背景(100)；Sketch.rotateX(sketch.frameCount * 0.01);Sketch.rotateZ(sketch.frameCount * 0.02);Sketch.cone(30, 50);}};//创建 p5 的第二个实例并传入草图 2 的函数新的 p5(s2);

<script src='https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.8.0/p5.min.js'></script><script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.8.0/addons/p5.dom.min.js"></script>

I want to try some things with stereoscopy in 3 dimensions and I need 2 canvas but I find nothing.

I've tried to use canvas1.background(200);

function setup() {
    let canvas1 = createCanvas(100, 100);
    canvas1.position(0,0);
}
function draw() {
//for canvas 1
    background(100);
    rotateX(frameCount * 0.01);
    rotateZ(frameCount * 0.01);
    cone(30, 50);
}
function setup() {
    let canvas2 = createCanvas(100, 100);
    canvas2.position(100,0);
}
function draw() {
//for canvas 2
    background(100);
    rotateX(frameCount * 0.01);
    rotateZ(frameCount * 0.02);
    cone(30, 50);
}

解决方案

To use multiple canvases you will need to use instance mode

The main difference from your code is that each set of p5.js methods will be inside of a function and all calls to p5.js methods will need to be called by the instance of p5 that is passed into the function.

var s1 = function( sketch ) {
  sketch.setup = function() {
    let canvas1 = sketch.createCanvas(100, 100, sketch.WEBGL);
    canvas1.position(0,0);
  }
  sketch.draw = function() {
    //for canvas 1
    sketch.background(100);
    sketch.rotateX(sketch.frameCount * 0.01);
    sketch.rotateZ(sketch.frameCount * 0.01);
    sketch.cone(30, 50);
  }
};

// create a new instance of p5 and pass in the function for sketch 1
new p5(s1);

var s2 = function( sketch ) {

   sketch.setup = function() {
    let canvas2 = sketch.createCanvas(100, 100, sketch.WEBGL);
    canvas2.position(100,0);
  }
  sketch.draw = function() {
    //for canvas 2
    sketch.background(100);
    sketch.rotateX(sketch.frameCount * 0.01);
    sketch.rotateZ(sketch.frameCount * 0.02);
    sketch.cone(30, 50);
  }
};

// create the second instance of p5 and pass in the function for sketch 2
new p5(s2);

<script src='https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.8.0/p5.min.js'></script>
 <script src="https://cdnjs.cloudflare.com/ajax/libs/p5.js/0.8.0/addons/p5.dom.min.js"></script>

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