oxiphysics_geometry/csg/
sdfbox_traits.rs

1//! # SdfBox - Trait Implementations
2//!
3//! This module contains trait implementations for `SdfBox`.
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::{length, normalize};
13use super::types::SdfBox;
14
15impl ImplicitSurface for SdfBox {
16    fn sdf(&self, p: [f64; 3]) -> f64 {
17        let d = [
18            (p[0] - self.center[0]).abs() - self.half_extents[0],
19            (p[1] - self.center[1]).abs() - self.half_extents[1],
20            (p[2] - self.center[2]).abs() - self.half_extents[2],
21        ];
22        let exterior = length([d[0].max(0.0), d[1].max(0.0), d[2].max(0.0)]);
23        let interior = d[0].max(d[1]).max(d[2]).min(0.0);
24        exterior + interior
25    }
26    fn gradient(&self, p: [f64; 3]) -> [f64; 3] {
27        const EPS: f64 = 1e-5;
28        let dx = self.sdf([p[0] + EPS, p[1], p[2]]) - self.sdf([p[0] - EPS, p[1], p[2]]);
29        let dy = self.sdf([p[0], p[1] + EPS, p[2]]) - self.sdf([p[0], p[1] - EPS, p[2]]);
30        let dz = self.sdf([p[0], p[1], p[2] + EPS]) - self.sdf([p[0], p[1], p[2] - EPS]);
31        normalize([dx, dy, dz])
32    }
33}
oxiphysics_geometry/csg/sdfbox_traits.rs

oxiphysics_geometry/csg/
sdfbox_traits.rs
