Is there a way to link two spheres together with a line? I'm looking for a solution that mimics two balls connected by a rope or something elastic. Does anyone have any examples to share?
Is there a way to link two spheres together with a line? I'm looking for a solution that mimics two balls connected by a rope or something elastic. Does anyone have any examples to share?
If you want to create an arrow connecting two points, follow these steps:
let start = new THREE.Vector3(15,25,35);
let end = new THREE.Vector3(75,85,95);
let dir = new THREE.Vector3().subVectors(end, start).normalize();
let arrow = new THREE.ArrowHelper(dir, start, start.distanceTo(end), 0xCC0000);
scene.add(arrow);
Now, if you just need to draw a simple line from one point to another, it's a bit more complex:
let lineGeometry = new THREE.Geometry();
lineGeometry.vertices.push(new THREE.Vector3(15,25,35), new THREE.Vector3(75,85,95));
lineGeometry.computeLineDistances();
let lineMaterial = new THREE.LineBasicMaterial({ color: 0xCC0000 });
let line = new THREE.Line(lineGeometry, lineMaterial);
scene.add(line);
The concept I mentioned necessitates the use of a physics engine.
For demonstrations, you can check out this website:
To achieve a stretchy effect between two objects, consider implementing a Bezier Curve in your project using Three.js. There are various types of Bezier Curves available in the library. Check out this resource for more details.
If you are looking to simulate a horizontal rope-like connection using physics engines, you can utilize multiple THREE.Line elements linked together and incorporate a physics engine like cannon.js. For seamless integration, consider using THREEx.cannon.js.
Example of a straight red line created using BufferGeometry
Update in Threejs r125, check out the details
let geometry = new THREE.BufferGeometry().setFromPoints([
new THREE.Vector3(-5, 5, 0),
new THREE.Vector3(5, 5, 0)
])
let line = new THREE.Line(geometry, new THREE.LineBasicMaterial({ color: 0xff0000 }))
scene.add(line)
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