Curves
In Babylon.js, curves represent mathematical paths used to animate objects or define trajectories in a scene. They can be used to control the movement of meshes, cameras, or particles, adding smooth and natural motion.
Arc
Given three points in space, not in a straight line, it is always possible to draw join the points up using a circular arc or to draw a circle through the three points.
const f = new Vector3(-0.5 + Math.random(), -0.5 + Math.random(), -0.5 + Math.random()).scale(20);
const s = new Vector3(-0.5 + Math.random(), -0.5 + Math.random(), -0.5 + Math.random()).scale(20);
const t = new Vector3(-0.5 + Math.random(), -0.5 + Math.random(), -0.5 + Math.random()).scale(20);
// ...
<>
<sphere name='sphere-1' position={f}>
<standardMaterial name='sphere-1-mat' diffuseColor={Color3.Red()} />
</sphere>
<sphere name='sphere-2' position={s}>
<standardMaterial name='sphere-1-mat' diffuseColor={Color3.Green()} />
</sphere>
<sphere name='sphere-3' position={t}>
<standardMaterial name='sphere-1-mat' diffuseColor={Color3.Blue()} />
</sphere>
<lines name='arc' options={{ points: Curve3.ArcThru3Points(f, s, t, 32).getPoints() }} />
</>
Segment
If you want that the the first and third point are linked by a segment, set the fifth argument, closed, to true.
<lines name='segment' options={{ points: Curve3.ArcThru3Points(f, s, t, 32, true).getPoints() }} />Full circle
If you want that the curves forms the complete circle through the three point, set the sixth argument, fullCircle, to true.
<lines name='full-circle' options={{ points: Curve3.ArcThru3Points(f, s, t, 32, false, true).getPoints() }} />Learn More
The curves mentioned above are just the beginning of what’s possible with curves in Babylon.js. For a more in-depth exploration, please refer to the Babylon.js documentation:: https://doc.babylonjs.com/features/featuresDeepDive/mesh/drawCurves.
