Torsion Tab
Curved Rectangular, Elliptical and Cellulose fibers can be twisted to achieve torsion, when entering adequate values for Torsion Start Angle and Max Torsion Change.
In the examples below, observe the effect of varying the torsion parameters on a highly anisotropic structure (Anisotropy 1 = 0.001, Anisotropy 2 = 1) made of curved ellipsoidal fibers. The curl parameters are Isotropic, and Randomness is 0, producing straight fibers parallel to the Z-axis. Both Torsion Start Angle and Max Torsion Change values are initially set to 0 in the Torsion panel to generate fibers without torsion.
Torsion Start Angle
The Torsion Start Angle defines how strongly the fibers are twisted within the first segment length.
With Torsion Start Angle values of 5, 30, and 45, and a Max Torsion Change value of 0, fibers with a constant spin of 5º, 30º and 45º within each segment are generated.
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Max Torsion Change
The Max Torsion Change determines the maximum allowed degree of change of the Torsion Angle from one segment to the next. The torsion change between different segments is uniformly distributed.
The use of Max Torsion Change adds a random component the torsion angle. The torsion change angle is drawn from a uniform distribution with the limits [‑Max Torsion Change, Max Torsion Change] and added to the current torsion angle.
Observe the effect of keeping a Torsion Start Angle of 0 and entering increasing values of Maximal Torsion Change (5, 10 and 30) on a highly anisotropic structure made of curved cellulose fibers.
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