- Last row of transform matrix is unused, make it 4x3
- Requires funny row-major packing due to vec3 std140 padding.
- Teach spirv parser to tolerate non-square matrix types, though
they aren't supported anywhere else yet.
- Compute cofactor in shader for normal matrix, ALU is free,
optimize out many terms, rm maf_cofactor.
- Take out complex UBO alignment logic since stuff is PO2 these days.
This was a common bottleneck for some workloads, so there are measurable
performance gains (up to 2x faster pass submission on CPU). GPU time is
identical, at least on desktop.
It's useful. quat(lovr.headset.getOrientation()):direction() is
verbose, noob-unfriendly, and somewhat wasteful. I think this was
originally removed because something about not exposing the full
rotation basis.
LOVR doesn't require OpenXR to run. When the headset module is enabled
and the openxr headset driver is enabled, LOVR tries to initialize
OpenXR, and if it fails then it will try the next driver.
The OpenXR loader will print error messages to stderr by default. This
is undesirable because someone who is unfamiliar with OpenXR will see a
bunch of messages in their console that say "ERROR" and think something
is wrong, even though the messages are innocuous and don't indicate an
actual problem.
The only way to silence these messages from the OpenXR loader, to my
knowledge, is to set the XR_LOADER_DEBUG environment variable to 'none'.
This is only done when the environment variable isn't set, so it's still
possible to set XR_LOADER_DEBUG to see the logs.
Most OBJ loaders use OpenGL texture coordinate conventions.
After switching to Vulkan, the UV origin became upper-left and images no
longer needed to be flipped on import. This means that the OBJ importer
now needs to flip its UVs to compensate. Somehow, no one noticed until
now! Most people are using glTF I guess.
Recent SteamVR versions have bugs with it, especially after triggering a
recenter operation.
In SteamVR, recentering fires referenceSpaceChangePending for the LOCAL
space, then the STAGE space, then the LOCAL space again, all with
different changeTimes. No poseInPreviousSpace is given.
Recreating the main reference space whenever this event is received
leads to strange, inconsistent issues. Sometimes the local/stage spaces
end up on top of each other, other times one or both will be way up in
the air (putting the headset at negative y coordinates).
This bug is even present when recentering in the compositor, so it's not
an issue with lovr. Cautiously disabling the local-floor emulation on
SteamVR runtimes and just always using the STAGE space until things are
sorted out.
The "vec3 is 4 floats" thing was consistently confusing to people. It's
reverted everywhere except for Curve.
maf now has full sets of methods for vec2/vec3/vec4, for consistency.
Vector bindings now use luax_readvec* helper functions for the
number/vector variants, and use maf for most functionality, which cleans
things up a lot.
Some compile fixes and a rename from gpu_wgpu to gpu_web, since wgpu
refers to a specific implementation of WebGPU and I'm really bad at
typing it for some reason.
This reverts commit b7a00c82d1.
I think srgb-encoded rgb10a2 swapchains require manual gamma correction
in shaders (?!), which we aren't quite ready for yet because shaders don't
know the "color space" of their canvas textures.
- Adds Pass:setViewCull to enable/disable frustum culling.
- Renames Pass:setCullMode to Pass:setFaceCull (with backcompat).
Some stuff currently missing:
- Text is not culled, but should be.
- VR view frusta are not merged yet.
It's important that the bits for the vector type occupy the least
significant bits, so that vectors can be distinguished from pointer
lightuserdata.
When the vector pool was expanded, this broke, causing e.g. Blob
pointers to exhibit undefined behavior when trying to use them as
vectors.
tbh I still don't understand the union/bitfield memory layout.
bjorn
xiejiangzhi
Josip Miskovic