ImageMirror doesn't work in BlenderPlayer with quadbuffered #43537

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Angus Hollands · 2015-02-02T22:47:06+01:00

Angus Hollands commented

2015-02-02 22:47:06 +01:00

ImageMirror functionality uses active camera to render to texture instead of rendering the view of a camera at the mirror plane along the normal.
Use the blend file here, and test with the embedded player. Only change is to enable quad buffered

http://www.tutorialsforblender3d.com/BGE_Python/Video_Texture/ImageMirror/ImageMirror.html

ImageMirror functionality uses active camera to render to texture instead of rendering the view of a camera at the mirror plane along the normal. Use the blend file here, and test with the embedded player. Only change is to enable quad buffered http://www.tutorialsforblender3d.com/BGE_Python/Video_Texture/ImageMirror/ImageMirror.html

Angus Hollands commented

2015-02-02 22:47:06 +01:00

Changed status to: 'Open'

Angus Hollands commented

2015-02-02 22:47:06 +01:00

Added subscriber: @AngusHollands-4

Angus Hollands commented

2015-02-02 22:59:37 +01:00

I also expect that quadbuffer will fall back to no-stereo in the case that no quadbuffer capable card is present, which is why I do not see this on my machine.

Dalai Felinto commented

2015-02-02 23:07:32 +01:00

Added subscribers: @BenoitBolsee, @dfelinto

Dalai Felinto commented

2015-02-02 23:07:32 +01:00

@BenoitBolsee any clues on that?

Benoit Bolsee commented

2015-02-06 11:20:33 +01:00

I don't understand the problem. ImageMirror does a render to texture using a internal camera that is oriented along the normal of the mirror and placed at the symmetric position than the target camera; it does not use the active camera as the description above tends to say.

I ran the demo in Blender and in the player, the reflection image is geometrically exact as can be seen by the alignment of the floor lines across the mirror.

I don't understand the problem. ImageMirror does a render to texture using a internal camera that is oriented along the normal of the mirror and placed at the symmetric position than the target camera; it does not use the active camera as the description above tends to say. I ran the demo in Blender and in the player, the reflection image is geometrically exact as can be seen by the alignment of the floor lines across the mirror.

Angus Hollands commented

2015-02-06 11:24:37 +01:00

Unfortunately in blender player, it is using the active camera, not the mirror plane camera added at runtime. Only fails with quad buffer on a machine which supports it afaict

Unfortunately in blender player, it *is* using the active camera, not the mirror plane camera added at runtime. Only fails with quad buffer on a machine **which supports it** afaict

Benoit Bolsee commented

2015-02-07 01:04:00 +01:00

Now I understand. If the problem is with quad buffer, than most probably there is a mixup between the buffers: the render happens on the right buffer while the texture is loaded from the left buffer or something like that. I think there's just a missing call to glDrawBuffer.
I can easily add that but testing will be more difficult: although I have a quadro FX 370 card, it seems that the Linux driver does not support it for quad buffer stereo. I'll prepare a patch anyway.

Now I understand. If the problem is with quad buffer, than most probably there is a mixup between the buffers: the render happens on the right buffer while the texture is loaded from the left buffer or something like that. I think there's just a missing call to glDrawBuffer. I can easily add that but testing will be more difficult: although I have a quadro FX 370 card, it seems that the Linux driver does not support it for quad buffer stereo. I'll prepare a patch anyway.

Benoit Bolsee commented

2015-02-09 23:06:35 +01:00

Here is a patch that I think should work. Can someone with a quadro card test it?
quadbuffer.patch

Here is a patch that I think should work. Can someone with a quadro card test it? [quadbuffer.patch](https://archive.blender.org/developer/F142174/quadbuffer.patch)

Thomas Szepe commented

2015-03-31 10:50:04 +02:00

Added subscriber: @hg1

Thomas Szepe commented

2015-03-31 10:50:04 +02:00

I have tested it. It is working with my FX3700M.

Angus Hollands commented

2015-03-31 13:54:43 +02:00

Sorry, in the middle of a crunch period I forgot to reply. It's working for our test machine, thanks Benoit!

Angus Hollands commented

2015-04-07 14:26:27 +02:00

Changed status from 'Open' to: 'Resolved'

Angus Hollands closed this issue

2015-04-07 14:26:27 +02:00

Angus Hollands self-assigned this 2015-04-07 14:26:27 +02:00

Angus Hollands commented

2015-04-07 14:26:27 +02:00

This comment was removed by @AngusHollands-4

*This comment was removed by @AngusHollands-4*

Angus Hollands commented

2015-04-07 18:38:59 +02:00

Changed status from 'Resolved' to: 'Open'

Angus Hollands reopened this issue

2015-04-07 18:38:59 +02:00

Angus Hollands commented

2015-04-07 18:40:31 +02:00

The patch seems good from my end, and HG1, can this be comitted?

Mitchell Stokes commented

2015-04-07 19:17:50 +02:00

Added subscriber: @Moguri

Mitchell Stokes commented

2015-04-07 19:17:50 +02:00

Seeing as this patch came from Benoit, who is the module owner of VideoTexture, and two people have confirmed that it fixes the issue, I think this patch can be committed.

blender-admin commented

2015-04-11 16:08:15 +02:00

This issue was referenced by b329016b29

This issue was referenced by b329016b29c3189e23bafebbe984008dae0d60a2

Thomas Szepe commented

2015-04-11 16:09:18 +02:00

Changed status from 'Open' to: 'Resolved'

Thomas Szepe closed this issue

2015-04-11 16:09:18 +02:00

Thomas Szepe commented

2015-04-11 16:09:18 +02:00

Closed by commit b329016b29.

Closed by commit b329016b29.

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ImageMirror doesn't work in BlenderPlayer with quadbuffered #43537