The Spin operator gives an angular velocity to particles in an event, with optional random variation. Spin is applied once per event per particle, except when using the Speed Space Follow option; however, the settings can be animated.
To simply specify particle orientation, use the Rotation operator.
The user interface appears in the parameters panel, on the right side of the Particle View dialog.
The X axis is aligned with the particle direction, while the Z axis is perpendicular to the X axis and is pointed upward with respect to world space as much as possible.
Use the X/Y/Z settings to specify the orientation for all particles.
The X axis is aligned with the particle direction, while the Z axis is perpendicular to the X axis and is pointed upward with respect to world space as much as possible.
Use the X/Y/Z settings to specify the orientation for all particles.
Use these to set the spin axis. Unavailable for the Random 3D option. Default=0,0,1. Range=–1.0 to 1.0.
To specify a single axis, set the corresponding parameter to any nonzero value, and the others to 0. A negative value flips the axis, and reverses the direction of rotation. The numeric values come into play when you give more than one axis a nonzero value, in which case their effect is relative to one another. For example, if you want the spin axis to be oriented halfway between the positive X and Y axes, you would set X and Y to the same positive amount. The actual value doesn't matter. Similarly, to set the spin axis to 30 degrees (1/3 of the angle) from the X axis to the Y axis, you'd set the Y value to twice that of the X value. For example, X=0.2 and Y=0.4, or X=0.5 and Y=1.0.