Crate micromath[−][src]
Embeddedfriendly (i.e. #![no_std]
) math library featuring fast, safe
floating point approximations for common arithmetic operations, as well as
2D and 3D vector types, statistical analysis functions, and quaternions.
Floating point approximations
micromath
supports approximating many arithmetic operations on f32
using bitwise operations, providing great performance and small code size
at the cost of precision. For use cases like graphics and signal
processing, these approximations are often sufficient and the performance
gains worth the lost precision.
These approximations are provided by the micromath::F32Ext trait which is
impl’d for f32
, providing a dropin std
compatible (sans lost precision) API.
use micromath::F32Ext; let n = 2.0.sqrt(); assert_eq!(n, 1.5); // close enough
Unused import warnings when linking std
Since the F32Ext
trait provides methods which are already defined in
std
, in cases where your crate links std
the F32Ext
versions of
the same methods will not be used, in which case you will get an unused
import warning for F32Ext
.
If you encounter this, add an #[allow(unused_imports)]
above the import.
#[allow(unused_imports)] use micromath::F32Ext;
Vector types
See the vector
module for more information on vector types.
The following vector types are available, all of which have pub x
and
pub y
(and on 3D vectors, pub z
) members:
Rust  2D  3D 

i8  I8x2  I8x3 
i16  I16x2  I16x3 
i32  I32x2  I32x3 
u8  U8x2  U8x3 
u16  U16x2  U16x3 
u32  U32x2  U32x3 
f32  F32x2  F32x3 
Statistical analysis
See the statistics
module for more information on statistical analysis
traits and functionality.
The following traits are available and impl’d for slices and iterators of
f32
(and can be impl’d for other types):
 Mean  compute arithmetic mean with the
mean()
method  StdDev  compute standard deviation with the
stddev()
method  Trim  cull outliers from a sample slice with the
trim()
method.  Variance  compute variance with the `variance() method
Quaternions
See the quaternion
module for more information.
Reexports
pub use crate::quaternion::Quaternion; 
pub use crate::vector::Vector; 
pub use crate::vector::VectorExt; 
pub use generic_array; 
Modules
quaternion  quaternion Quaternions are a number system that extends the complex numbers which can be used for efficiently computing spatial rotations. 
statistics  statistics Statistical analysis support. 
vector  vector Algebraic vector types generic over a number of axes and a component type. 
Traits
F32Ext 
