@tom_forsyth @TimSweeneyEpic Also, this diagram is clearly talking about the up direction in world space, but neither DirectX nor OpenGL define a world-space up direction *at all*.

Source

• URL: https://x.com/EricLengyel/status/952672665818427393
• Author: Eric Lengyel (@EricLengyel)
• Posted: 2018-01-14 22:43:57

Branch

1/ @EricLengyel

@tom_forsyth @TimSweeneyEpic

Also, this diagram is clearly talking about the up direction in world space, but neither DirectX nor OpenGL define a world-space up direction at all. Those APIs do not belong here. People use this to defend Y-up all the time, and they’re completely misunderstanding.

Related

• Spine: 2018-01-14-sorry-yall-i-was-young-and-this-coordinate-system