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# Bevy Utilitarian
Contains a varied set of utilities to make bevy programming easier. Currently,
mostly geometric, maths and interpolation utilities.
## What?
Currently, this library offers:
- `steppers` module: _Dynamic_ interpolation helpers: used for when you cannot
express the change of the value you want to interpolate easily as a parametric
curve, such as when using a spring-damper system as an interpolator or when
you want to update the interpolation _target_ before it has been reached.
You simply set the current value, target value and some interpolator-specific
parameters (e.g. spring and damping coefficient for spring interpolator, speed
for linear interpolator) and call `.tick()` every frame to update the current
value. Using `.get()` you access the current value.
- `geometric` module: Offers `PitchYaw` and `PitchYawClamped` types,
representing spherical positions (i.e. Euler rotations without the _roll_
field). `PitchYaw` wraps around the boundary, whereas `PitchYawClamped` is
clamped to the allowable angle ranges. The latter is useful for use in
interpolation helpers where you don't want the interpolator to move the
current value across the `-PI->PI` boundary. Specific use case examples of
either of these types are:
aiming/look direction in first/third person character controllers, look
direction parameter for animation (where you don't want the character's head to
turn 360 degrees).
- `randomized_values` module: Offers `RandValue` trait and implementations for
`RandVec3` and `RandF32`. They are self-contained data types with an ergonomic
API for generating random values based on some parameters.
## Version table
| 0.1 | 0.12 |
| 0.2 | 0.12 |
| 0.3 | 0.12 |
| 0.4 | 0.13 |
| 0.5 | 0.14 |
| 0.6 | 0.15 |