Add option to exclude back facing geometry from snapping #71217

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opened 2019-10-30 14:46:06 +01:00 by Sebastian Parborg · 5 comments

Sebastian Parborg commented

2019-10-30 14:46:06 +01:00

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Motivation

When snapping, be it during normal modeling or when retopoing a sculpt, it
would be very nice to only snap to mesh elements which normal face the camera.

Proposal

The check for snapping would go something like this:

Get the normal of the snapping candidate
Calculate the vector from the camera to the center of the element in question (we will call this the camera vector)
Create the dot product of the camera vector and the normal
If the dot product is positive, that means that the element is back facing and should be excluded from snapping

This option will be available as a checkbox in the snapping drop down menu.

Perhaps this option should also be on automatically when backface culling is turned on.

**Motivation** When snapping, be it during normal modeling or when retopoing a sculpt, it would be very nice to only snap to mesh elements which normal face the camera. **Proposal** The check for snapping would go something like this: - Get the normal of the snapping candidate - Calculate the vector from the camera to the center of the element in question (we will call this the camera vector) - Create the dot product of the camera vector and the normal - If the dot product is positive, that means that the element is back facing and should be excluded from snapping This option will be available as a checkbox in the snapping drop down menu. Perhaps this option should also be on automatically when backface culling is turned on.

Germano Cavalcante was assigned by Sebastian Parborg

2019-10-30 14:46:06 +01:00

Sebastian Parborg commented

2019-10-30 14:46:06 +01:00

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Added subscriber: @ZedDB

Added subscriber: @ZedDB

Sebastian Parborg commented

2019-10-30 14:46:55 +01:00

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Added subscriber: @ideasman42

Added subscriber: @ideasman42

Sebastian Parborg commented

2019-10-30 14:46:55 +01:00

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@ideasman42 I hope this proposal is fine with you. This came out of a discussion with the artists at the studio.

@ideasman42 I hope this proposal is fine with you. This came out of a discussion with the artists at the studio.

Germano Cavalcante commented

2019-10-31 18:11:47 +01:00

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Changed status from 'Open' to: 'Resolved'

Changed status from 'Open' to: 'Resolved'

Germano Cavalcante closed this issue

2019-10-31 18:11:47 +01:00

Germano Cavalcante commented

2019-10-31 18:11:47 +01:00

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Resolved by committing 44d67b6dc8

Resolved by committing 44d67b6dc8

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Reference: blender/blender#71217

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