function getPositions(objArray) {
const points = [];
objArray.forEach((obj) => {
points.push(obj.position);
});
return points;
}
function pointsInView(particles) {
camera.updateMatrix(); // make sure camera's local matrix is updated
camera.updateMatrixWorld(); // make sure camera's world matrix is updated
var frustum = new THREE.Frustum().setFromProjectionMatrix(
new THREE.Matrix4().multiplyMatrices(
camera.projectionMatrix,
camera.matrixWorldInverse
)
);
const points = getPositions(particles);
//console.log(points);
const out = [];
points.forEach((point) => {
if (frustum.containsPoint(point)) {
out.push(point);
}
});
return out;
}
{
//init
var particleNum = 10;
const particles = [];
for (let i = 0; i < particleNum; i++) {
const pos = new THREE.Vector3(random(-5, 5), random(-5, 5), random(-5, 5));
particles.push(createCube(pos));
}
// loop
while (run) {
const p = intersects();
if (p) {
target.position.set(p.x, p.y, p.z);
}
console.log(pointsInView(particles).length);
renderer.render(scene, camera);
yield null;
}
}
function createCube(pos) {
const material = new THREE.MeshNormalMaterial();
const geometry = new THREE.BoxGeometry(1, 1, 1);
const cube = new THREE.Mesh(geometry, material);
cube.position.set(pos.x, pos.y, pos.z);
cube.updateMatrixWorld();
scene.add(cube);
return cube;
}
plane = {
const geometry = new THREE.PlaneGeometry(50, 50);
const material = new THREE.MeshBasicMaterial({
color: 0xffff00,
side: THREE.DoubleSide
});
const plane = new THREE.Mesh(geometry, material);
plane.visible = false;
scene.add(plane);
return plane;
}
function map(n, start1, stop1, start2, stop2) {
return ((n - start1) / (stop1 - start1)) * (stop2 - start2) + start2;
}
mouse = new THREE.Vector2()
height = 600
scene = {
const scene = new THREE.Scene();
scene.background = new THREE.Color(0x001b42);
return scene;
}
camera = {
const fov = 45;
const aspect = width / height;
const near = 1;
const far = 1000;
const camera = new THREE.PerspectiveCamera(fov, aspect, near, far);
camera.position.set(2, 2, -2)
camera.lookAt(new THREE.Vector3(0, 0, 0));
return camera;
}
renderer = {
const renderer = new THREE.WebGLRenderer({antialias: true});
renderer.setSize(width, height);
renderer.setPixelRatio(devicePixelRatio);
const controls = new THREE.OrbitControls(camera, renderer.domElement);
controls.addEventListener("change", () => renderer.render(scene, camera));
renderer.domElement.addEventListener( 'mousemove', onMouseMove, false )
invalidation.then(() => (controls.dispose(), renderer.dispose()));
return renderer;
}
random = (max = 0, min = 0) => Math.random() * (max - min) + min
THREE = {
const THREE = window.THREE = await require("three@0.130.0/build/three.min.js");
await require("three@0.130.0/examples/js/controls/OrbitControls.js").catch(() => {});
return THREE;
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.