I'm drawing an arrow between pick and place points using QuadraticBezierCurve3
and ConeGeometry
, but the rotation of the cone is not perfect as you can see in the snippet down!
Can you please tell me how can I improve the visualization (cone rotation) of my arrow function? thanks in advance.
var camera, scene, renderer;
init();
animate();
/**
draw arrow
*/
function drawArrow(pick_pos, place_pos, scene) {
/**
* Curve
*/
const start = new THREE.Vector3();
start.add(pick_pos)
const finish = new THREE.Vector3();
finish.add(place_pos)
let mid = new THREE.Vector3();
mid.add(start);
let dist = finish.x + mid.x;
mid.x = dist/2;
mid.y += 3;
const b_curve = new THREE.QuadraticBezierCurve3(
start,
mid,
finish
);
const points = b_curve.getPoints( 100 );
const line_geometry = new THREE.BufferGeometry().setFromPoints( points );
const material = new THREE.LineBasicMaterial( { color: 0x0ffffb, linewidth:5 } );
const curve = new THREE.Line( line_geometry, material );
/**
* Cone
*/
const cone_geometry = new THREE.ConeGeometry( 0.2, 1, 8 );
const cone_material = new THREE.MeshBasicMaterial({ color: 0xff00fb });
const cone = new THREE.Mesh( cone_geometry, cone_material );
cone.position.set(points[98].x, points[98].y, points[98].z);
cone.rotateX(Math.PI * points[100].x);
cone.rotateZ(Math.PI * points[100].z);
/**
* Arrow
*/
const arrow = new THREE.Group();
arrow.add(curve);
arrow.add(cone);
arrow.name = 'arrow';
scene.add(arrow);
}
/**
Create the scene, camera, renderer
*/
function init() {
scene = new THREE.Scene();
scene.background = new THREE.Color(0x21252d);
renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setPixelRatio(window.devicePixelRatio);
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
camera = new THREE.PerspectiveCamera(50, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.x = 0;
camera.position.y = 8;
camera.position.z = 10;
scene.add(camera);
controls = new THREE.OrbitControls(camera, renderer.domElement);
const pick = new THREE.Vector3(0, 0, 0);
const place = new THREE.Vector3(5, 0, 5);
drawArrow(pick, place, scene);
window.addEventListener('resize', onWindowResize);
}
function onWindowResize() {
camera.aspect = window.innerWidth / window.innerHeight;
camera.updateProjectionMatrix();
renderer.setSize(window.innerWidth, window.innerHeight);
}
function animate() {
requestAnimationFrame(animate);
render();
}
function render() {
renderer.render(scene, camera);
}
<script src="https://cdn.jsdelivr.net/npm/three@0.122.0/build/three.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/three@0.122.0/examples/js/controls/OrbitControls.min.js"></script>
from Better arrow cone rotation using ThreeJs
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