Figure out why the view totally breaks sometimes.

[cnlohr]

Some people want:

quatnormalize( LookQuaternion, newquat );

commented out. But, it does prevent the view from righting itself, and carrying through portals correctly.

[jaredloomis]

It would be nice to know who else is having this problem, because it only breaks on some systems.

I don't know what is relevant, but here are some of my specs:

• Arch Linux x86_64, kernal 3.17
• AMD Radeon HD 6450
• catalyst-test 14.9-11 from AUR. Supports OpenGL up to 4.4.
• gcc 4.9.1
• tcc 0.9.26
• freeglut 2.8.1

[phiresky]

I have Arch x86_64 kernel 3.16, gcc, tcc and freeglut are the same for me.

I'd say it's because of your GPU not liking the shaders, they are very complex. Maybe this could be used to find out what's wrong.

[cnlohr]

I'm on an NVIDIA GPU - do both of you guys have the view issue?

I think I should valgrind the issue. Can one of you guys take a video of it failing?

[phiresky]

No, I do not, works fine for me.

[cnlohr]

Bump Fiendfan, can you post a video or pictures or anything?

[jaredloomis]

I should be able to post some video in a few hours.

[jaredloomis]

Here's a video and the trace file, for use with apitrace.

[jaredloomis]

In the video at about 0:20-0:30, I was holding down "w" and moving the mouse around. When the mouse is moved but no movement key pressed, it has no effect. When a movement key is pressed and then I move the mouse around, it moves me around slightly and cancels out most movement caused by pressing the key, but there is no rotation in either case.

[cnlohr]

That is very strange. I've never used apitrace, I'm going to try to give that a shot in the next few days. In the mean time, it would be helpful for you to print both quaternions around the normalize... So I can see what the numerical values are. That would be significantly easier.

[jaredloomis]

I'm not at my computer for a while, but I'm fairly sure I remember the quaternion values.

Before normalization, the quaternion is within a few tenths more or less than "0.5 0.5 0.5 0.5", depending on how much I moved the mouse. After normalization, the quaternion is always exactly "0.5 0.5 0.5 0.5". I will post the actual data when I am able to.

[jaredloomis]

After doing more tests, it seems that gpRotFwd->NewDirection and gpRotUp->NewDirection are always 0 0 0 0. I'm investigating in RTHelper.cpp to see if I can find out why.

[cnlohr]

I think that we can detect cases like this and reset the camera. Once reset, I would expect it to continue acting normally. For now, you can try to reset the quaternion to <0,0,0,1>