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oxiphysics_geometry/csg/
sdftorus_traits.rs

1//! # SdfTorus - Trait Implementations
2//!
3//! This module contains trait implementations for `SdfTorus`.
4//!
5//! ## Implemented Traits
6//!
7//! - `ImplicitSurface`
8//!
9//! 🤖 Generated with [SplitRS](https://github.com/cool-japan/splitrs)
10
11use super::functions::ImplicitSurface;
12use super::functions::normalize;
13use super::types::SdfTorus;
14
15impl ImplicitSurface for SdfTorus {
16    fn sdf(&self, p: [f64; 3]) -> f64 {
17        let q0 = (p[0] * p[0] + p[2] * p[2]).sqrt() - self.major_radius;
18        (q0 * q0 + p[1] * p[1]).sqrt() - self.minor_radius
19    }
20    fn gradient(&self, p: [f64; 3]) -> [f64; 3] {
21        const EPS: f64 = 1e-5;
22        let dx = self.sdf([p[0] + EPS, p[1], p[2]]) - self.sdf([p[0] - EPS, p[1], p[2]]);
23        let dy = self.sdf([p[0], p[1] + EPS, p[2]]) - self.sdf([p[0], p[1] - EPS, p[2]]);
24        let dz = self.sdf([p[0], p[1], p[2] + EPS]) - self.sdf([p[0], p[1], p[2] - EPS]);
25        normalize([dx, dy, dz])
26    }
27}