https://github.com/thejustinwalsh/defold-xmath

Defold Math eXtension Library that avoids allocations
https://github.com/thejustinwalsh/defold-xmath

defold defold-native-extension game lua

Last synced: about 1 month ago
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Defold Math eXtension Library that avoids allocations

• Host: GitHub
• URL: https://github.com/thejustinwalsh/defold-xmath
• Owner: thejustinwalsh
• License: mit
• Created: 2021-10-17T17:23:33.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2025-01-03T02:08:59.000Z (5 months ago)
• Last Synced: 2025-03-31T14:58:23.301Z (3 months ago)
• Topics: defold, defold-native-extension, game, lua
• Language: C++
• Homepage: https://thejustinwalsh.com/defold-xmath/
• Size: 2.48 MB
• Stars: 28
• Watchers: 4
• Forks: 3
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-defold - xMath - imagining of vmath functions that avoid allocations. (Libraries / Programming Language)

README

        
# xMath Extension

> Defold Math Library ❌ ~~allocations~~

A re-imagining of vmath functions that avoid allocations by taking the output as the first argument instead of returning a new Vector3, Vector4, or Quat requiring an allocation.

```lua

go.property("dir", vmath.vector3(0, 1, 0))

-- allocate v once and reuse each update

local v = vmath.vector3();

function update(self, dt)

  local pos = go.get_position();

  xmath.mul(v, self.dir, 5 * dt); -- save 1 allocation 

  xmath.add(v, pos, v);           -- save 2 allocations

  go.set_position(v);

end

```

## Demo

https://thejustinwalsh.com/defold-xmath/