​

let ww,wh, TSize, TCount, ori, cp

​

function setup() {

//  noLoop()

    noStroke()

    angleMode(DEGREES)

    ww=windowWidth

    wh=windowHeight

    if (ww>wh){

        createCanvas(wh, wh)

        TSize=wh*0.02

        TCount=wh/TSize

        cp=wh/2

        ori='wh'

    } else {

        createCanvas(ww, ww)

        TSize=ww*0.02

        TCount=ww/TSize

        cp=ww/2

        ori='ww'

    }

    print ('ww',ww, 'wh',wh, 'TSize',TSize, 'TCount', TCount, 'ori',ori, 'cp',cp)

}

​

let ro = -1

function draw() {

    background(0)

    fill('white')

    push()

    translate(cp,cp)

    doTri()

    pop()

    ro+=0.5

    push()

​

    translate(cp,cp)

    rotate(ro)

    doTri()

    pop()

​

}

​

function doTri(){

    beginShape()

  for(let y=0;y<TCount;y++){

      let yPoz=y*TSize

        for(let x=0;x<TCount;x++){

            vertex(TSize*x - cp, yPoz+TSize - cp)

            vertex(TSize/2+(TSize*x)- cp, yPoz - cp)

            vertex(TSize+(TSize*x)- cp, yPoz+TSize - cp)

        }  // end x loop

        vertex(TSize/2- cp,yPoz+TSize - cp) // set to start of next line

        vertex(0- cp, yPoz+TSize - cp)

    } // end y loop

    endShape(CLOSE)

}

​

​