LOD will display wrong LOD level object if zoomed out then in #44448

New Issue

Thomas Szepe · 2015-04-19T11:32:33+02:00

Thomas Szepe commented

2015-04-19 11:32:33 +02:00

System Information
Windows 7 64bit, Nvidia Geforce GTX 460

Blender Version
Tested with Blender 2.74 [000dfc0] and custom build from master.

Short description of error
It looks like, if you zoomed in the actual LOD level object will replaced first with the lod 0 object.
After the second viewport update the object will be replaced with the correct LOD level object.

Exact steps for others to reproduce the error
Open the test file and zoom out and then zoom in with the mouse wheel.
Updating the viewport by selecting the viewport with left mouse button (moving cursor) will replace the LOD object with the correct one.

LOD.blend

**System Information** Windows 7 64bit, Nvidia Geforce GTX 460 **Blender Version** Tested with Blender 2.74 [000dfc0] and custom build from master. **Short description of error** It looks like, if you zoomed in the actual LOD level object will replaced first with the lod 0 object. After the second viewport update the object will be replaced with the correct LOD level object. **Exact steps for others to reproduce the error** Open the test file and zoom out and then zoom in with the mouse wheel. Updating the viewport by selecting the viewport with left mouse button (moving cursor) will replace the LOD object with the correct one. ![LOD_viewport_update.png](https://archive.blender.org/developer/F164363/LOD_viewport_update.png) [LOD.blend](https://archive.blender.org/developer/F164365/LOD.blend)

Thomas Szepe commented

2015-04-19 11:32:33 +02:00

Changed status to: 'Open'

Daniel Stokes was assigned by Thomas Szepe

2015-04-19 11:32:33 +02:00

Thomas Szepe commented

2015-04-19 11:32:33 +02:00

Added subscriber: @hg1

Thomas Szepe commented

2015-04-19 23:09:12 +02:00

edited projects, added Game Engine; removed BF Blender.

LOD was implemented for the game engine, but there is no bug in the game engine. It is a bug in the Blender viewport.

> edited projects, added Game Engine; removed BF Blender. LOD was implemented for the game engine, but there is no bug in the game engine. It is a bug in the Blender viewport.

Julian Eisel commented

2015-04-19 23:33:22 +02:00

Added subscriber: @JulianEisel

Julian Eisel commented

2015-04-19 23:33:22 +02:00

Are you sure this is a viewport bug? I mean have you debugged it? My first guess would be a mistake in the data handling, maybe with Object->currentlod. Of course it could be an OGL issue, but I doubt this is the case since we didn't get any similar non-LOD-related bugs in recently (well that still isn't a proof it's not a viewport bug, just trying to say it sounds rather unlikely for now).
And also it seems to me the LOD processing code is in the game engine code, isolated from Blender's main code.

Are you sure this is a viewport bug? I mean have you debugged it? My first guess would be a mistake in the data handling, maybe with `Object->currentlod`. Of course it could be an OGL issue, but I doubt this is the case since we didn't get any similar non-LOD-related bugs in recently (well that still isn't a proof it's not a viewport bug, just trying to say it sounds rather unlikely for now). And also it seems to me the LOD processing code is in the game engine code, isolated from Blender's main code.

Thomas Szepe commented

2015-04-20 21:43:30 +02:00

No I don't debugged it. I only made some tests with the test file.
But I am pretty sure the the fault is in the viewport render code and not in the BGE code. Because there is not the same bug in the BGE and as the LOD processing code in the game engine ( KX_GameObject::UpdateLod), is isolated from LOD processing for the Blender viewport (view3d_draw.c BKE_object_lod_update; object.c lod_level_select).
I also don't think it is a OGL bug, because it will work in the BGE. But I am not sure at this point.

No I don't debugged it. I only made some tests with the test file. But I am pretty sure the the fault is in the viewport render code and not in the BGE code. Because there is not the same bug in the BGE and as the LOD processing code in the game engine ( KX_GameObject::UpdateLod), is isolated from LOD processing for the Blender viewport (view3d_draw.c BKE_object_lod_update; object.c lod_level_select). I also don't think it is a OGL bug, because it will work in the BGE. But I am not sure at this point.

Jorge Bernal commented

2015-05-18 06:58:27 +02:00

Added subscriber: @JorgeBernalMartinez