SOURCE

var data = [2]
var rectW = 1

var ran = 90 
data = data.map(e=>{
	let point1 = new THREE.Vector2(- rectW / 2, 0)
	let point2 = new THREE.Vector2(- rectW / 2, e)
	let point3 = new THREE.Vector2(rectW / 2, e)
	let point4 = new THREE.Vector2(rectW / 2, 0)
	
	rotatePoint(point1,ran,0)
	rotatePoint(point2,ran,0)
	rotatePoint(point3,ran,0)
	rotatePoint(point4,ran,0)

	return [[point1.x,point1.y],[point2.x,point2.y],[point3.x,point3.y],[point4.x,point4.y]]
})
console.log(data)

function rotatePoint(point,degree,offset)
{
	var offsetVec = new THREE.Vector2(0,offset)
	var matrix = new THREE.Matrix3();
	var radian = degree* Math.PI / 180
	point.add(offsetVec)

	matrix.set(Math.cos(radian),-Math.sin(radian),0,
					 Math.sin(radian),Math.cos(radian),0,
					 0,0,0
					)

	point.applyMatrix3(matrix)
	
	return point
}