JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://threejs.org/build/three.min.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>
<script>
  function OffsetContour(offset, contour) {
  	
    let result = [];
    
    offset = new THREE.BufferAttribute(new Float32Array([offset, 0, 0]), 3);
    console.log("offset", offset);
    
    for (let i = 0; i < contour.length; i++) {
      let v1 = new THREE.Vector2().subVectors(contour[i - 1 < 0 ? contour.length - 1 : i - 1], contour[i]);
      let v2 = new THREE.Vector2().subVectors(contour[i + 1 == contour.length ? 0 : i + 1], contour[i]);
      let angle = v2.angle() - v1.angle();
      let halfAngle = angle * 0.5;
			
      let hA = halfAngle;
      let tA = v2.angle() + Math.PI * 0.5;
      
      let shift = Math.tan(hA - Math.PI * 0.5);
      let shiftMatrix = new THREE.Matrix4().set(
             1, 0, 0, 0, 
        -shift, 1, 0, 0,
             0, 0, 1, 0,
             0, 0, 0, 1
      );
			
      
      let tempAngle = tA;
      let rotationMatrix = new THREE.Matrix4().set(
        Math.cos(tempAngle), -Math.sin(tempAngle), 0, 0,
        Math.sin(tempAngle),  Math.cos(tempAngle), 0, 0,
                          0,                    0, 1, 0,
                          0,                    0, 0, 1
      );

      let translationMatrix = new THREE.Matrix4().set(
        1, 0, 0, contour[i].x,
        0, 1, 0, contour[i].y,
        0, 0, 1, 0,
        0, 0, 0, 1,
      );

      let cloneOffset = offset.clone();
      console.log("cloneOffset", cloneOffset);
   		shiftMatrix.applyToBufferAttribute(cloneOffset);
      rotationMatrix.applyToBufferAttribute(cloneOffset);
      translationMatrix.applyToBufferAttribute(cloneOffset);

      result.push(new THREE.Vector2(cloneOffset.getX(0), cloneOffset.getY(0)));
    }
    debugger

    return result;
  }

</script>

CSS

body {
  overflow: hidden;
  margin: 0;
}

JavaScript

var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.set(0, 8, 1);
var renderer = new THREE.WebGLRenderer({
  antialias: true
});
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);

var controls = new THREE.OrbitControls(camera, renderer.domElement);

var light = new THREE.DirectionalLight(0xffffff, 0.75);
light.position.setScalar(10);
scene.add(light);
scene.add(new THREE.AmbientLight(0xffffff, 0.25));

var helper = new THREE.GridHelper(8, 8);
scene.add(helper);

var contour1 = [
	new THREE.Vector2(-0.1119572256903325,-0.14252051077050965),
  new THREE.Vector2(0.10975718458439587,-0.14310303311816597),
  new THREE.Vector2(0.11127948725177816,0.13894259858534497),
  new THREE.Vector2(0.1068347874478377,0.13895764037215486),
  new THREE.Vector2(0.06373126366580095,0.1395345664070078),
  new THREE.Vector2(0.020626281121622014,0.1396804426163385),
  new THREE.Vector2(-0.02247724266041473,0.14025736865119143),
  new THREE.Vector2(-0.10868720774871575,0.1405491210701939),
  new THREE.Vector2(-0.11087287440582827,0.1406220952283661),
];
const offsets = [-0.003592102448427661,-0.021552614690565967]
const color=['green','red']
for (let i = 0; i < 2; i++){
	
  let points = OffsetContour(offsets[i], contour1);
  console.log(points);
  let geom = new THREE.BufferGeometry().setFromPoints(points);
  geom.rotateX(-Math.PI * 0.5);
  let line = new THREE.LineLoop(geom, new THREE.LineBasicMaterial({color: color[i]}));
  scene.add(line);

}

render();

function render() {
  requestAnimationFrame(render);
  renderer.render(scene, camera);
}