Unknown snap error #44647

New Issue

Alexey · 2015-05-09T22:22:03+02:00

Alexey commented

2015-05-09 22:22:03 +02:00

windows7 64
ASUS ATI Radeon HD6870

Blender Version
Broken: All
Worked: None

Short description of error
Incorrect snap closest in edit mode to other object
Exact steps for others to reproduce the error
snap.blend

PS This error is active if we have big plane ang rotated cube in single object too,
but if we have different object, we can repeat it in object mode...

windows7 64 ASUS ATI Radeon HD6870 Blender Version Broken: All Worked: None **Short description of error** Incorrect snap closest in edit mode to other object **Exact steps for others to reproduce the error** [snap.blend](https://archive.blender.org/developer/F171920/snap.blend) ![1.png](https://archive.blender.org/developer/F171921/1.png) ![2.png](https://archive.blender.org/developer/F171924/2.png) PS This error is active if we have big plane ang rotated cube in single object too, but if we have different object, we can repeat it in object mode... ![3.png](https://archive.blender.org/developer/F171937/3.png)

Alexey commented

2015-05-09 22:22:03 +02:00

Changed status to: 'Open'

Alexey commented

2015-05-09 22:22:03 +02:00

Added subscriber: @Inwader77

Bastien Montagne commented

2015-05-10 09:55:39 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2015-05-10 09:55:39 +02:00

Snap varies because it selects a different vertex of your cube a 'reference' (active snap vertex has a small circle in addition).

Now, how this active-snap vertex is selected seems rather random on first sight, checking further.

Snap varies because it selects a different vertex of your cube a 'reference' (active snap vertex has a small circle in addition). Now, how this active-snap vertex is selected seems rather random on first sight, checking further.

Sergey Sharybin commented

2015-05-25 20:54:19 +02:00

Added subscriber: @Sergey

Bastien Montagne was assigned by Sergey Sharybin

2015-05-25 20:54:19 +02:00

Sergey Sharybin commented

2015-05-25 20:54:19 +02:00

@mont29, any progress here?

There are few things here:

BVH is being re-constructed every time in this case, which might give some deterministic results when having vertices equally distanced from the ray.
"reference" is getting selected based on the distance to ray after casting it and intersecting BVH.

So not sure if it's solvable with the current snapping design, to me it's more a TODO item related on the general transform system rethinking.

@mont29, any progress here? There are few things here: - BVH is being re-constructed every time in this case, which might give some deterministic results when having vertices equally distanced from the ray. - "reference" is getting selected based on the distance to ray after casting it and intersecting BVH. So not sure if it's solvable with the current snapping design, to me it's more a TODO item related on the general transform system rethinking.

perfection cat commented

2015-05-26 05:02:32 +02:00

Added subscriber: @sindra1961

perfection cat commented

2015-05-26 05:02:32 +02:00

I think that it becomes in the same way in 2.49b.
It is not necessary to have a particularly big Plane.
Cube should turn so that face of Cube does not contact for Plane.
cube is placed in face of plane vertex of cube near the mouse cursor to make a snap.

I think that it becomes in the same way in 2.49b. It is not necessary to have a particularly big Plane. Cube should turn so that face of Cube does not contact for Plane. cube is placed in face of plane vertex of cube near the mouse cursor to make a snap.

perfection cat commented

2015-05-26 05:06:26 +02:00

sample.blend
In the case of GX,GY, similar phenomenon occurs.
But this is the phenomenon that cube is pulled back to.

[sample.blend](https://archive.blender.org/developer/F180008/sample.blend) In the case of GX,GY, similar phenomenon occurs. But this is the phenomenon that cube is pulled back to.

perfection cat commented

2015-05-26 05:19:58 +02:00

This comment was removed by @sindra1961

*This comment was removed by @sindra1961*

perfection cat commented

2015-05-26 05:40:47 +02:00

It can reproduce even an object mode.

I think that it's not the bug.
Probably I think that cube is placed so that vertex near the mouse cursor adheres to plane among vertex of cube projected on plane.

Closest
    move the closest point of the selection to the target.

It can reproduce even an object mode. I think that it's not the bug. Probably I think that cube is placed so that vertex near the mouse cursor adheres to plane among vertex of cube projected on plane. ``` Closest move the closest point of the selection to the target. ```

Bastien Montagne commented

2015-05-26 15:09:25 +02:00

Changed status from 'Open' to: 'Archived'

Bastien Montagne closed this issue

2015-05-26 15:09:25 +02:00

Bastien Montagne commented

2015-05-26 15:09:25 +02:00

Yeah, like @sindra1961 said, there is actually no bug at all here! If one want 'stable' target snapping point, just chose a different option ('Active', 'Center' or 'Median').

Everything is working as expected (this time).

Yeah, like @sindra1961 said, there is actually no bug at all here! If one want 'stable' target snapping point, just chose a different option ('Active', 'Center' or 'Median'). Everything is working as expected (this time).

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Unknown snap error #44647