Struct re_space_view_spatial::proc_mesh::OctahedronBase

struct OctahedronBase;

Base shape for [hexasphere]’s subdivision algorithm which is an octahedron that is subdivided into a sphere mesh. The value of this shape for us is that it has “equatorial” edges which are perpendicular to the axes of the ellipsoid, which thus align with the quantities the user actually specified (length on each axis), and can be usefully visualized by themselves separately from the subdivision mesh.

TODO(kpreid): This would also make sense to contribute back to hexasphere itself.

Trait Implementations

impl BaseShape for OctahedronBase

const EDGES: usize = 12usize

The octahedron has 12 edges, which we are arbitrarily numbering as follows:

0. -X to -Y
1. -X to -Z
2. -X to +Y
3. -X to +Z
4. -Z to -Y
5. -Z to +Y
6. +Z to -Y
7. +Z to +Y
8. +X to -Y
9. +X to -Z
10. +X to +Y
11. +X to +Z

fn initial_points(&self) -> Vec<Vec3A>

The vertices for all main triangles of the shape. Check the source file for this crate and look for the constants module at the bottom for an example.

fn triangles(&self) -> Box<[Triangle]>

Main triangles for the shape; that is, the triangles which exist before subdivision.

fn interpolate(&self, a: Vec3A, b: Vec3A, p: f32) -> Vec3A

Basic function used for interpolation. When p is 0.0, a is expected. When p is 1.0, b is expected. There are three options already implemented in this crate:

fn interpolate_half(&self, a: Vec3A, b: Vec3A) -> Vec3A

If an optimization is available for the case where p is 0.5, this function should implement it. This defaults to calling interpolate(a, b, 0.5) however.

fn interpolate_multiple( &self, a: Vec3A, b: Vec3A, indices: &[u32], points: &mut [Vec3A] )

If an optimization is available for the case where p varies but a and b don’t, this function should implement it.

impl Clone for OctahedronBase

fn clone(&self) -> OctahedronBase

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for OctahedronBase

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for OctahedronBase

fn default() -> OctahedronBase

Returns the “default value” for a type.

impl Copy for OctahedronBase