Camera non uniform scaling with Follow Path #76163

New Issue

Henrik D. · 2020-04-27T22:11:51+02:00

Henrik D. commented

2020-04-27 22:11:51 +02:00

System Information
Operating system: Linux (debian bullseye)
Graphics card: Nvidia Geforce GTX 1070

Blender Version
Broken: 2.79b up to 2.90 current master
Worked: never (did not test earlier version than 2.79b)

Short description of error
If a camera is constraint to a curve that is non uniformly scaled with follow curve enabled, it will also get the non uniform scale, skewing the camera and messing up the view transform (or projection matrix) of the camera.

Exact steps for others to reproduce the error

Add a curve and constrain the camera
enable follow curve in the follow path constraint
scale the curve heavily along one axis
scroll through frames and observe the weirdness

camerascalebug.blend

**System Information** Operating system: Linux (debian bullseye) Graphics card: Nvidia Geforce GTX 1070 **Blender Version** Broken: 2.79b up to 2.90 current master Worked: never (did not test earlier version than 2.79b) **Short description of error** If a camera is constraint to a curve that is non uniformly scaled with follow curve enabled, it will also get the non uniform scale, skewing the camera and messing up the view transform (or projection matrix) of the camera. ![Screenshot_20200427_215806.png](https://archive.blender.org/developer/F8498034/Screenshot_20200427_215806.png) **Exact steps for others to reproduce the error** 1. Add a curve and constrain the camera 2. enable follow curve in the follow path constraint 3. scale the curve heavily along one axis 4. scroll through frames and observe the weirdness [camerascalebug.blend](https://archive.blender.org/developer/F8498046/camerascalebug.blend)

Henrik D. commented

2020-04-27 22:11:51 +02:00

Added subscriber: @HDMaster84

Germano Cavalcante commented

2020-04-28 15:32:34 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Henrik D. commented

2021-08-16 11:42:17 +02:00

This bug also shows with the Child Of Constraint if the parent is scaled non uniformly. Or even with normal parenting if the parent is scaled non uniformly.

Notice the camera gizmo is also showing wrong.

This bug also shows with the Child Of Constraint if the parent is scaled non uniformly. Or even with normal parenting if the parent is scaled non uniformly. ![Screenshot_20210816_114040.png](https://archive.blender.org/developer/F10283795/Screenshot_20210816_114040.png) Notice the camera gizmo is also showing wrong.

Philipp Oeser removed the

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Camera non uniform scaling with Follow Path #76163