[−][src]Trait plexus::index::IndexVertices

pub trait IndexVertices<P> where
    P: Topological, {
    fn index_vertices_with<R, N, K, F>(
        self, 
        indexer: N, 
        f: F
    ) -> (Vec<R::Item>, Vec<P::Vertex>)
    where
        Self: GroupedIndexVertices<R, P>,
        R: Grouping,
        N: Indexer<P, K>,
        F: Fn(&P::Vertex) -> &K,
    { ... }

    fn index_vertices<R, N>(self, indexer: N) -> (Vec<R::Item>, Vec<P::Vertex>)
    where
        Self: GroupedIndexVertices<R, P>,
        R: Grouping,
        N: Indexer<P, P::Vertex>,
    { ... }
}

Functions for collecting a stream of $n$-gons into raw index and vertex buffers.

Unlike GroupedIndexVertices, this trait provides functions that are parameterized with respect to grouping. See the Grouping trait.

Using an indexer is not always the most effecient method to create a mesh data structure from a generator. Generators provide per-attribute indices that may be less expensive than an indexer when only a single attribute is needed. For example, see also vertices_with_position and indices_for_position.

See HashIndexer and LruIndexer.

Examples

use decorum::N64;
use nalgebra::Point3;
use plexus::index::{Flat3, HashIndexer};
use plexus::prelude::*;
use plexus::primitive::generate::Position;
use plexus::primitive::sphere::UvSphere;

let sphere = UvSphere::new(32, 32);
let (indices, positions) = sphere
    .polygons::<Position<Point3<N64>>>()
    .triangulate()
    .index_vertices::<Flat3, _>(HashIndexer::default());

Provided methods

fn index_vertices_with<R, N, K, F>(
    self,
    indexer: N,
    f: F
) -> (Vec<R::Item>, Vec<P::Vertex>) where
    Self: GroupedIndexVertices<R, P>,
    R: Grouping,
    N: Indexer<P, K>,
    F: Fn(&P::Vertex) -> &K, 

Indexes a stream of $n$-gons into raw index and vertex buffers using the given grouping, indexer, and keying function.

fn index_vertices<R, N>(self, indexer: N) -> (Vec<R::Item>, Vec<P::Vertex>) where
    Self: GroupedIndexVertices<R, P>,
    R: Grouping,
    N: Indexer<P, P::Vertex>, 

Indexes a stream of $n$-gons into raw index and vertex buffers using the given grouping and indexer.

Examples

use decorum::N64;
use nalgebra::Point3;
use plexus::index::HashIndexer;
use plexus::prelude::*;
use plexus::primitive::cube::Cube;
use plexus::primitive::generate::Position;
use plexus::primitive::Trigon;

// `indices` contains `Trigon`s with index data.
let (indices, positions) = Cube::new()
    .polygons::<Position<Point3<N64>>>()
    .subdivide()
    .triangulate()
    .index_vertices::<Trigon<usize>, _>(HashIndexer::default());
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Implementors

impl<P, I> IndexVertices<P> for I where
    I: Iterator<Item = P>,
    P: Topological, [src]

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