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fix: position_vector is a specialized displacement

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Mateusz Pusz
2024-11-06 18:30:51 +01:00
parent 4e6abda727
commit 0c692dca8c
5 changed files with 11 additions and 11 deletions
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2
docs/blog/posts/isq-part-3-modeling-isq.md
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@@ -150,8 +150,8 @@ flowchart TD
path_length --- distance["<b>distance</b>"]
distance --- radial_distance["<b>radial_distance</b>"]
length --- wavelength["<b>wavelength</b>"]
length --- position_vector["<b>position_vector</b><br>{vector}"]
length --- displacement["<b>displacement</b><br>{vector}"]
displacement --- position_vector["<b>position_vector</b>"]
radius --- radius_of_curvature["<b>radius_of_curvature</b>"]
```

4
docs/blog/posts/isq-part-4-implemeting-isq.md
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@@ -49,8 +49,8 @@ flowchart TD
path_length --- distance["<b>distance</b>"]
distance --- radial_distance["<b>radial_distance</b>"]
length --- wavelength["<b>wavelength</b>"]
length --- position_vector["<b>position_vector</b><br>{vector}"]
length --- displacement["<b>displacement</b><br>{vector}"]
displacement --- position_vector["<b>position_vector</b>"]
radius --- radius_of_curvature["<b>radius_of_curvature</b>"]
```
@@ -74,8 +74,8 @@ inline constexpr auto arc_length = path_length;
inline constexpr struct distance final : quantity_spec<path_length> {} distance;
inline constexpr struct radial_distance final : quantity_spec<distance> {} radial_distance;
inline constexpr struct wavelength final : quantity_spec<length> {} wavelength;
inline constexpr struct position_vector final : quantity_spec<length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement final : quantity_spec<length, quantity_character::vector> {} displacement;
inline constexpr struct position_vector final : quantity_spec<displacement> {} position_vector;
```
Thanks to the expressivity and power of C++ templates, we can specify all quantity properties

6
docs/users_guide/framework_basics/character_of_a_quantity.md
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@@ -97,22 +97,22 @@ enumeration can be appended to the `quantity_spec` describing such a quantity ty
=== "C++23"
```cpp
inline constexpr struct position_vector final : quantity_spec<length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement final : quantity_spec<length, quantity_character::vector> {} displacement;
inline constexpr struct position_vector final : quantity_spec<displacement> {} position_vector;
```
=== "C++20"
```cpp
inline constexpr struct position_vector final : quantity_spec<position_vector, length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement final : quantity_spec<displacement, length, quantity_character::vector> {} displacement;
inline constexpr struct position_vector final : quantity_spec<position_vector, displacement> {} position_vector;
```
=== "Portable"
```cpp
QUANTITY_SPEC(position_vector, length, quantity_character::vector);
QUANTITY_SPEC(displacement, length, quantity_character::vector);
QUANTITY_SPEC(position_vector, displacement);
```
With the above, all the quantities derived from `position_vector` or `displacement` will have a correct

8
docs/users_guide/framework_basics/systems_of_quantities.md
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@@ -109,8 +109,8 @@ flowchart TD
path_length --- distance["<b>distance</b>"]
distance --- radial_distance["<b>radial_distance</b>"]
length --- wavelength["<b>wavelength</b>"]
length --- position_vector["<b>position_vector</b><br>{vector}"]
length --- displacement["<b>displacement</b><br>{vector}"]
displacement --- position_vector["<b>position_vector</b>"]
radius --- radius_of_curvature["<b>radius_of_curvature</b>"]
```
@@ -164,8 +164,8 @@ For example, here is how the above quantity kind tree can be modeled in the libr
inline constexpr struct distance final : quantity_spec<path_length> {} distance;
inline constexpr struct radial_distance final : quantity_spec<distance> {} radial_distance;
inline constexpr struct wavelength final : quantity_spec<length> {} wavelength;
inline constexpr struct position_vector final : quantity_spec<length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement final : quantity_spec<length, quantity_character::vector> {} displacement;
inline constexpr struct position_vector final : quantity_spec<displacement> {} position_vector;
```
=== "C++20"
@@ -186,8 +186,8 @@ For example, here is how the above quantity kind tree can be modeled in the libr
inline constexpr struct distance final : quantity_spec<distance, path_length> {} distance;
inline constexpr struct radial_distance final : quantity_spec<radial_distance, distance> {} radial_distance;
inline constexpr struct wavelength final : quantity_spec<wavelength, length> {} wavelength;
inline constexpr struct position_vector final : quantity_spec<position_vector, length, quantity_character::vector> {} position_vector;
inline constexpr struct displacement final : quantity_spec<displacement, length, quantity_character::vector> {} displacement;
inline constexpr struct position_vector final : quantity_spec<position_vector, displacement> {} position_vector;
```
=== "Portable"
@@ -208,8 +208,8 @@ For example, here is how the above quantity kind tree can be modeled in the libr
QUANTITY_SPEC(distance, path_length);
QUANTITY_SPEC(radial_distance, distance);
QUANTITY_SPEC(wavelength, length);
QUANTITY_SPEC(position_vector, length, quantity_character::vector);
QUANTITY_SPEC(displacement, length, quantity_character::vector);
QUANTITY_SPEC(position_vector, displacement);
```
!!! note

2
src/systems/include/mp-units/systems/isq/space_and_time.h
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@@ -42,8 +42,8 @@ QUANTITY_SPEC(thickness, width);
QUANTITY_SPEC(diameter, width);
QUANTITY_SPEC(distance, path_length);
QUANTITY_SPEC(radial_distance, distance);
QUANTITY_SPEC(position_vector, length, quantity_character::vector);
QUANTITY_SPEC(displacement, length, quantity_character::vector);
QUANTITY_SPEC(position_vector, displacement);
QUANTITY_SPEC(radius_of_curvature, radius);
QUANTITY_SPEC(curvature, inverse(radius_of_curvature));
QUANTITY_SPEC(volume, pow<3>(length));