# Understanding applymatrix() and linear algebra

**URL:** <https://discourse.processing.org/t/understanding-applymatrix-and-linear-algebra/11068>\
**Category:** Processing\
**Created:** [May 9, 2019, 2:38pm UTC](https://discourse.processing.org/t/understanding-applymatrix-and-linear-algebra/11068 "2019-05-09T14:38:54Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Avatrin](https://avatars.discourse-cdn.com/v4/letter/a/97f17d/32.png) [@Avatrin](https://discourse.processing.org/u/Avatrin)\
**Post date:** [May 12, 2019, 2:51pm UTC](https://discourse.processing.org/t/understanding-applymatrix-and-linear-algebra/11068/5 "2019-05-12T14:51:37Z")

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Well, I figured it out myself:

To convert between the usual depiction of the coordinates and the ones used here, the space has to be rotated 180 degrees about the x-axis first.

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