pub fn r1(angle_rad: f64) -> Matrix3<f64>Expand description
Returns a rotation matrix for a rotation about the X axis.
§Arguments
angle_rad- The angle of rotation in radians.
§Warning
This function returns a matrix for a COORDINATE SYSTEM rotation by angle_rad radians.
When this matrix is applied to a vector, it rotates the vector by -angle_rad radians, not angle_rad radians.
Applying the matrix to a vector yields the vector’s representation relative to the rotated coordinate system.
§Example
use nyx_space::utils::r1;
let angle_rad = std::f64::consts::PI / 2.0;
let rotation_matrix = r1(angle_rad);