prisma

var qb;

​

function setup() {

  createCanvas(windowWidth, windowHeight, WEBGL);

  background(255);

  qb = new QB(100,100,100);

  strokeWeight(.5);

  noFill();

  noLoop();

}

​

function draw() {

  background(255);

  // orbitControl();

  rotateX(PI/3);

  rotateZ(PI/3);

  rotateY(PI);

  scale(2.4);

  translate(-50,-50,-80)

  qb.draw();

}

​

class QB {

  constructor(a,b,c){

    this.a=a;

    this.b=b;

    this.c=c;

  }

  draw(){

    beginShape();

    stroke(0,127);

    var xyNumSteps = 100;

    var zStep = this.c/xyNumSteps;

​

    var v0=createVector(0,0,0);

    var v1=createVector(0,this.b,zStep/4);

    var v2=createVector(this.a,this.b,zStep/2);

    var v3=createVector(this.a,0,zStep*3/4);

    var v4=createVector(0,0,zStep);

    var acNoise = [];

    for(var i=0; i< xyNumSteps; i++){

      acNoise.push(noise(i));

    }

    for(var n = 0; n< xyNumSteps; n++){

      var iv = createVector(0,0,zStep*n);

      var stepVector = p5.Vector.sub(v1, v0).div(xyNumSteps);

      var v = p5.Vector.add(v0,iv);

      for(var i=0; i< xyNumSteps; i++){

        vertex(v.x,v.y,v.z+acNoise[i]);

        v.add(stepVector);

      }

      stepVector = p5.Vector.sub(v2, v1).div(xyNumSteps);

      for(var i=0; i< xyNumSteps; i++){

        vertex(v.x,v.y,v.z+acNoise[i]);

        v.add(stepVector);

      }

      stepVector = p5.Vector.sub(v3, v2).div(xyNumSteps);

      for(var i=0; i< xyNumSteps; i++){

        vertex(v.x,v.y,v.z+acNoise[i]);

        v.add(stepVector);

      }

      stepVector = p5.Vector.sub(v4, v3).div(xyNumSteps);

      for(var i=0; i< xyNumSteps; i++){

        vertex(v.x,v.y,v.z+acNoise[i]);

        v.add(stepVector);

      }

      for(var i=0; i < xyNumSteps; i++){

        acNoise[i] += 2*noise(i+n*xyNumSteps);

      }

    }

    endShape();

  }

}