Equation in Fisheye Lens Polynomial section has an error. #104871

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sgkwon · 2024-07-22T04:50:25+02:00

sgkwon commented

2024-07-22 04:50:25 +02:00

Page Information
File: manual/render/cycles/object_settings/cameras.rst
Blender Version: 4.2
Documentation Language: en
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Short description of error
In "Fisheye Lens Polynomial" section, the equation for φ is written as
φ = acos(x/r)
where r = sqrt(x^2 + y^2). This is somewhat confusing because acos is bound in the range of [0, π]. If φ is longitude, then I believe it should be like this:
φ = atan(y/x)

**Page Information** File: `manual/render/cycles/object_settings/cameras.rst` Blender Version: `4.2` Documentation Language: `en` [Permanent Link](https://docs.blender.org/manual/en/4.2/render/cycles/object_settings/cameras.html) **Short description of error** In "Fisheye Lens Polynomial" section, the equation for φ is written as φ = acos(x/r) where r = sqrt(x^2 + y^2). This is somewhat confusing because acos is bound in the range of [0, π]. If φ is longitude, then I believe it should be like this: φ = atan(y/x)

sgkwon added the

labels 2024-07-22 04:50:26 +02:00

sgkwon changed title from ~~Equation in Fisheye Lens Polynomial section had an error.~~ to Equation in Fisheye Lens Polynomial section has an error.

2024-07-22 05:17:35 +02:00

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