Struct VisualizationHelper 

pub struct VisualizationHelper;

Implementations

impl VisualizationHelper

pub fn compute_normals_pca(particles: &mut Vec<ModelParticle>, k: usize)

Compute per-particle normals from k-nearest neighborhood (PCA on local point cloud).

pub fn classify_surface_interior( particles: &[ModelParticle], k: usize, density_threshold: f32, ) -> Vec<bool>

Detect surface vs interior particles using k-NN density estimation. Surface particles have lower local density than interior ones.

pub fn find_edges( particles: &[ModelParticle], max_dist: f32, ) -> Vec<(usize, usize)>

Wireframe mode: find pairs of nearby particles to draw as edges.

pub fn normal_visualization_particles( particles: &[ModelParticle], offset: f32, normal_char: char, normal_color: Vec4, ) -> Vec<ModelParticle>

Normal visualization: offset particles slightly along their normal.

pub fn average_normal(particles: &[ModelParticle], indices: &[usize]) -> Vec3

Compute the average normal of a set of particles.

pub fn normal_color_overlay(particles: &mut Vec<ModelParticle>)

Generate a color-coded particle overlay showing normals direction.

pub fn build_spatial_hash( particles: &[ModelParticle], cell_size: f32, ) -> HashMap<(i32, i32, i32), Vec<usize>>

Build a spatial hash grid for fast neighbor lookups.

pub fn query_spatial_hash( grid: &HashMap<(i32, i32, i32), Vec<usize>>, center: Vec3, radius: f32, cell_size: f32, ) -> Vec<usize>

Query spatial hash grid for neighbors within radius.