Function smoothstep_simd 

pub fn smoothstep_simd<F>(
    edge0: F,
    edge1: F,
    x: &ArrayView1<'_, F>,
) -> Array1<F>
where
    F: Float + SimdUnifiedOps,

SIMD-accelerated smoothstep interpolation

Returns smooth Hermite interpolation between 0 and 1 when edge0 < x < edge1:

• Returns 0 if x <= edge0
• Returns 1 if x >= edge1
• Returns smooth curve: 3t² - 2t³ where t = (x - edge0) / (edge1 - edge0)

Arguments

• edge0 - Lower edge of the transition
• edge1 - Upper edge of the transition
• x - Input values

Returns

Array of smoothstep values in [0, 1]

Examples

use scirs2_core::ndarray::{array, Array1};
use scirs2_core::ndarray_ext::elementwise::smoothstep_simd;

let x = array![0.0_f32, 0.25, 0.5, 0.75, 1.0];

let result = smoothstep_simd::<f32>(0.0, 1.0, &x.view());
assert!((result[0] - 0.0).abs() < 1e-6);  // x=0 -> 0
assert!((result[2] - 0.5).abs() < 1e-6);  // x=0.5 -> 0.5
assert!((result[4] - 1.0).abs() < 1e-6);  // x=1 -> 1

Use Cases

• Shader programming (smooth transitions)
• Activation function variants
• Anti-aliasing
• Soft thresholding