Struct Neighbors

pub struct Neighbors<T> {
    pub vertices: Vec<T>,
    pub polygons: Vec<Triangle<usize>>,
    /* private fields */
}

Neighbors search accelerating structure.

Fields

vertices: Vec<T>

Mesh vertices.

polygons: Vec<Triangle<usize>>

Mesh polygons.

Implementations

impl<T> Neighbors<T>

pub fn new(vertices: Vec<T>, polygons: Vec<Triangle<usize>>) -> Self

Build a Neighbors search based on the supplied vertices and supplied triangle list.

pub fn split(self) -> (Vec<T>, Vec<Triangle<usize>>)

return the vector and triangle list used to create the Neighbors

pub fn vertex_neighbors(&self, t: &usize) -> Option<&[usize]>

looks up the index of every polygon that contains vertex t, this can be used to calculate new faces

pub fn polygon_neighbors(&self, i: usize) -> Option<HashSet<usize>>

looks up the index of every polygon that is a neighbor of polygon at index i. This can be used to prep data for a Geometry shader (eg trinagle_adjacency)

pub fn normal_for_face<F>(&self, i: usize, f: F) -> Normal

where F: FnMut(&T) -> Normal,

Calculate the normal for face. This is a flat shading

You must supply a function that can be used to lookup The position which is needed to calculate the normal

pub fn normal_for_vertex<F>(&self, i: usize, f: F) -> Normal

where F: FnMut(&T) -> Normal,

Calculate the normal for an vertex based on the average of it’s Neighbors this is a smooth shading

You must supply a function that can be used to lookup The position which is needed to calculate the normal