The twist modifier applies a tornado twist like deformation to the geometry.
It follows a vector from a start to and end point in the vector and rotates all vertex for each point up to a defined final angle.
Apply the modifier to a geometry object, creates a new geometry with the result.
geometryTHREE.Geometry | THREE.BufferGeometry
Geometry to be transformed.
Result geometry after applying the modifier.
Twist direction vector, the twist is performed around this vector in its direction.