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Cake day: June 17th, 2023

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  • By that logic the only non-arbitrary dimension is defined by gravity, so the primary axis (X) should be up and down.

    Math is not rigid like you are saying: 3D coordinates can be oriented in any direction because they are fundamentally arbitrary. A lot of people a damn lot smarter than you have damn good reasons for using different coordinate systems, and they are mathematically correct.












  • Eh sort of? It’s all a matter of perspective. In Blender which uses a right hand system, when you view from the side, right is positive Y, up is positive Z, and towards the user is positive X.

    But looking from above, positive X is right, positive Y is up, and positive Z is towards the camera. Obviously if you rotate the camera to be viewing from the negative side of the axis some directions get flipped.

    Basically if you’re axis aligned, things work out the way you would expect.