pub trait Geometry: Sized {
type Vertex: Clone;
type Arc: Clone + Default;
type Edge: Clone + Default;
type Face: Clone + Default;
}Expand description
Graph geometry.
Specifies the types used to represent geometry for vertices, arcs, edges,
and faces in a graph. Arbitrary types can be used, including () for no
geometry at all.
Geometry is vertex-based. Geometric operations depend on understanding the positional data in vertices, and operational traits mostly apply to such positional data.
§Examples
use decorum::R64;
use nalgebra::{Point3, Vector4};
use num::One;
use plexus::geometry::convert::{AsPosition, IntoGeometry};
use plexus::geometry::Geometry;
use plexus::graph::MeshGraph;
use plexus::prelude::*;
use plexus::primitive::sphere::UvSphere;
// Vertex-only geometry with a position and color.
#[derive(Clone, Copy, Eq, Hash, PartialEq)]
pub struct VertexGeometry {
pub position: Point3<R64>,
pub color: Vector4<R64>,
}
impl Geometry for VertexGeometry {
type Vertex = Self;
type Arc = ();
type Edge = ();
type Face = ();
}
impl AsPosition for VertexGeometry {
type Target = Point3<R64>;
fn as_position(&self) -> &Self::Target {
&self.position
}
fn as_position_mut(&mut self) -> &mut Self::Target {
&mut self.position
}
}
// Create a mesh from a sphere primitive and map the geometry data.
let mut graph = UvSphere::new(8, 8)
.polygons_with_position()
.map_vertices(|position| VertexGeometry {
position: position.into_geometry(),
color: Vector4::new(One::one(), One::one(), One::one(), One::one()),
})
.collect::<MeshGraph<VertexGeometry>>();Required Associated Types§
type Vertex: Clone
type Arc: Clone + Default
type Edge: Clone + Default
type Face: Clone + Default
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.