​

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*0.05

        TCount=wh/TSize

        cp=wh/2

        ori='wh'

    } else {

        createCanvas(ww, ww)

        TSize=ww*0.05

        TCount=ww/TSize

        cp=ww/2

        ori='ww'

    }

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

}

​

let ro = 0

function draw() {

    background(0)

    fill('white')

    doTri()

    ro+=1

    push()

​

    translate(cp,cp)

    t.rotate(ro)

    doTri()

    pop()

​

}

​

let t

function doTri(){

    t = beginShape()

  for(let y=0;y<TSize;y++){

      let yPoz=y*TSize

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

            t.vertex(TSize*x, yPoz+TSize)

            t.vertex(TSize/2+(TSize*x), yPoz)

            t.vertex(TSize+(TSize*x), yPoz+TSize)

        }  // end x loop

        t.vertex(TSize/2,yPoz+TSize)    // set to start of next line

        t.vertex(0, yPoz+TSize)

    } // end y loop

    t.endShape(CLOSE)

//  print('t',t._renderer ) 

}

​