Wie erstelle ich ein Egg-Mesh in Three.js?

Question

Ich versuche, ein Ei Mesh in Three.js zu erstellen. Ich habe den folgenden Code mit einer LatheGeometry geschrieben, aber mir fehlt die richtige Gleichung. Kann jemand helfen?

var r0 = 40 
var r1 = r0/4; 
var inc = Math.PI/r0; 
points = []; 
points.push(new THREE.Vector2(0.0001, -r0/2)); 
for (var i = 0; i <= r0; i ++) { 
    var def = i<r0/2 ? 0 : r1*Math.sin((i-r0/2)*inc); 
    points.push(new THREE.Vector2(Math.sqrt(r0*i-i*i), i+def-r0/2)); 
} 
points.push(new THREE.Vector2(0.0001, -r0/2)); 
var geometry = new THREE.LatheGeometry(points, 30); 
var material = new THREE.MeshPhongMaterial({ color: 0xFFFF20 }); 
Ovo = new THREE.Mesh(geometry, material); 
Ovo.position.set(0, 20.1, 0); 
scene.add(Ovo); 

Answer 1

Sie können ein "Ei" Geometrie wie so erstellen:

// points - (x, y) pairs are rotated around the y-axis 
var points = []; 
for (var deg = 0; deg <= 180; deg += 6) { 

    var rad = Math.PI * deg/180; 
    var point = new THREE.Vector2((0.72 + .08 * Math.cos(rad)) * Math.sin(rad), - Math.cos(rad)); // the "egg equation" 
    //console.log(point); // x-coord should be greater than zero to avoid degenerate triangles; it is not in this formula. 
    points.push(point); 

} 

geometry = new THREE.LatheBufferGeometry(points, 32); 

three.js r.76