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LeonBaudouin/randomVectorInCone.ts

Created October 29, 2021 11:51
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randomVectorInCone.ts
const randomVectorInCone = (theta: number, target: THREE.Vector3) => {
const z = remap(Math.random(), [0, 1], [Math.cos(theta), 1])
const phi = remap(Math.random(), [0, 1], [0, 2 * Math.PI])
target.set(
Math.sqrt(1 - z * z) * Math.cos(phi),
Math.sqrt(1 - z * z) * Math.sin(phi),
z
)
target.normalize()
}
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