I previously inquired about a particular issue on this post: Adding Thickness to Faces
The main problem has been resolved, but now I have encountered a new issue. Initially, my walls were set to side:THREE.BackSide so they didn't display when facing the camera. However, now that they have thickness, this setting no longer works and I'm unsure of the reason behind it.
Here is the image before: Before
And here is the image after: After
How can I make the thick walls act like the Plane walls did?
Here is a basic idea for controlling the visibility of a wall with some modifications:
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(60, window.innerWidth / window.innerHeight, 1, 1000);
camera.position.set(0, 5, 5);
camera.lookAt(scene.position);
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);
scene.add(new THREE.GridHelper(10, 10));
var points = [
new THREE.Vector3(-2, 0, 2),
new THREE.Vector3(2, 0, 2),
new THREE.Vector3(2, 0, -2),
new THREE.Vector3(-2, 0, -2)
]
var walls = [];
points.forEach((p, idx, points) => {
let nextIdx = idx === points.length - 1 ? 0 : idx + 1;
buildWall(p, points[nextIdx], 2, 0.1);
});
function buildWall(pointStart, pointEnd, height, thickness) {
var boxW = pointEnd.clone().sub(pointStart).length();
var boxH = height;
var boxD = thickness;
var boxGeometry = new THREE.BoxGeometry(boxW, boxH, boxD);
boxGeometry.translate(0, boxH * 0.5, 0);
boxGeometry.rotateY(-Math.PI * 0.5);
var wall = new THREE.Mesh(boxGeometry, new THREE.MeshBasicMaterial({
color: "aqua",
wireframe: true
}));
wall.position.copy(pointStart).add(pointEnd).multiplyScalar(0.5);
wall.lookAt(pointEnd);
scene.add(wall);
walls.push(wall);
}
var currentPosition = new THREE.Vector3();
render();
function render() {
requestAnimationFrame(render);
walls.forEach(w => {
w.visible = currentPosition.copy(w.position).sub(camera.position).lengthSq() > camera.position.lengthSq();
})
renderer.render(scene, camera);
}body {
overflow: hidden;
margin: 0;
}<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/91/three.min.js"></script>
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