Trait AttributeUpdate

pub trait AttributeUpdate:
    Sized
    + Send
    + Sync {
    // Required methods
    fn merge(attr1: Self, attr2: Self) -> Self;
    fn split(attr: Self) -> (Self, Self);

    // Provided methods
    fn merge_incomplete(attr: Self) -> Self { ... }
    fn merge_from_none() -> Option<Self> { ... }
}

Generic attribute trait for logical behavior description

This trait can be implemented for a given attribute in order to define the behavior to follow when (un)sewing operations result in an update of the attribute.

Example

For an intensive property of a system (e.g. a temperature), an implementation would look like this:

use honeycomb_core::prelude::AttributeUpdate;

#[derive(Clone, Copy, Debug, PartialEq)]
pub struct Temperature {
    pub val: f32
}

impl AttributeUpdate for Temperature {
    fn merge(attr1: Self, attr2: Self) -> Self {
        Temperature { val: (attr1.val + attr2.val) / 2.0 }
    }

    fn split(attr: Self) -> (Self, Self) {
        (attr, attr)
    }

    fn merge_incomplete(attr: Self) -> Self {
        Temperature { val: attr.val / 2.0 }
    }

    fn merge_from_none() -> Option<Self> {
        Some(Temperature { val: 0.0 })
    }
}

let t1 = Temperature { val: 273.0 };
let t2 = Temperature { val: 298.0 };

let t_new = AttributeUpdate::merge(t1, t2); // use AttributeUpdate::_
let t_ref = Temperature { val: 285.5 };

assert_eq!(Temperature::split(t_new), (t_ref, t_ref)); // or Temperature::_

Required Methods

fn merge(attr1: Self, attr2: Self) -> Self

Merging routine, i.e. how to obtain the new attribute value from the two existing ones.

fn split(attr: Self) -> (Self, Self)

Splitting routine, i.e. how to obtain the two attributes from a single one.

Provided Methods

fn merge_incomplete(attr: Self) -> Self

Fallback merging routine, i.e. how to obtain the new attribute value from a single existing value.

The default implementation simply returns the passed value.

fn merge_from_none() -> Option<Self>

Fallback merging routine, i.e. how to obtain the new attribute value from no existing value.

The default implementation return None.

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.

Implementors

impl<T: CoordsFloat> AttributeUpdate for Vertex2<T>

Attribute logic definitions

• MERGING POLICY - The new vertex is placed at the midpoint between the two existing ones.
• SPLITTING POLICY - The current vertex is duplicated.
• (PARTIALLY) UNDEFINED ATTRIBUTES MERGING - The default implementations are used.

impl<T: CoordsFloat> AttributeUpdate for Vertex3<T>

Attribute logic definitions

• MERGING POLICY - The new vertex is placed at the midpoint between the two existing ones.
• SPLITTING POLICY - The current vertex is duplicated.
• (PARTIALLY) UNDEFINED ATTRIBUTES MERGING - The default implementations are used.