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# Objective - Adds a basic `Extrusion<T: Primitive2d>` shape, suggestion of #10572 ## Solution - Adds `Measured2d` and `Measured3d` traits for getting the perimeter/area or area/volume of shapes. This allows implementing `.volume()` and `.area()` for all extrusions `Extrusion<T: Primitive2d + Measured2d>` within `bevy_math` - All existing perimeter, area and volume implementations for primitves have been moved into implementations of `Measured2d` and `Measured3d` - Shapes should be extruded along the Z-axis since an extrusion of depth `0.` should be equivalent in everything but name to the base shape ## Caviats - I am not sure about the naming. `Extrusion<T>` could also be `Prism<T>` and the `MeasuredNd` could also be something like `MeasuredPrimitiveNd`. If you have any other suggestions, please fell free to share them :) ## Future work This PR adds a basic `Extrusion` shape and does not implement a lot of things you might want it to. Some of the future possibilities include: - [ ] bounding for extrusions - [ ] making extrusions work with gizmos - [ ] meshing --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> |
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Bevy Math
