Commit graph

576 commits

Author SHA1 Message Date
reduz
a674da4eec Implement 3D textures as import and resource format. 2020-09-09 13:50:21 -03:00
Marcel Admiraal
08bedf68ff Clarify comparison precedence when enabling or disabling back buffer. 2020-09-07 11:00:00 +01:00
Rémi Verschelde
53d83c4575
Merge pull request #41781 from AnilBK/fix-typo
Fixed Some typos.
2020-09-07 08:31:51 +02:00
reduz
d0bddf53c5 Implement manual particle emission and particle sub emitters. 2020-09-06 10:29:27 -03:00
Yuri Roubinsky
b1351fe781 Fix crash regression in the shader function validation
introduced in #41780
2020-09-05 13:49:50 +03:00
Yuri Roubinsky
ab9978697e Improve messages in shader function validation 2020-09-05 13:19:38 +03:00
Anilforextra
5705e0d309 Fixed Some typos. 2020-09-05 14:31:56 +05:45
Rémi Verschelde
6a03aed5a4
Merge pull request #40958 from clayjohn/VULKAN-shadow-noise
Improve the quick hash function for all GPUs
2020-09-04 10:53:01 +02:00
bruvzg
80b8eff6aa
[Complex Test Layouts] Change String to use UTF-32 encoding on all platforms. 2020-09-03 19:56:24 +03:00
Yuri Roubinsky
2a00c868de Fix particles shader to use built-ins 2020-09-02 22:54:41 +03:00
Juan Linietsky
f5f27bacdb Re-Implement GPU particles on master.
-No new features yet
-Unlike godot 3.x, sorting happens using GPU
2020-09-02 21:37:11 +02:00
Rémi Verschelde
23ce1dbfd5
Merge pull request #41668 from clayjohn/GLOW-HQ
Add high quality glow mode
2020-09-01 21:04:07 +02:00
JFonS
8ab510a130 Fix typo in SDF jumpflood shader 2020-09-01 14:40:59 +02:00
clayjohn
8da3c739bf Add high quality glow mode 2020-08-31 23:16:41 -07:00
clayjohn
d069cc9cf2 Fix recent glow regressions 2020-08-29 11:27:43 -07:00
Yetizone
118a7bc53f rasterizer_rd.cpp: Correct small typo 2020-08-27 12:44:18 +03:00
clayjohn
9d341acf2d Add fog to sky shaders 2020-08-19 22:58:14 -07:00
Hugo Locurcio
8891579068
Add a debanding property to Viewport
It can be enabled in the Project Settings
(`rendering/quality/screen_filters/use_debanding`). It's disabled
by default as it has a small performance impact and can make
PNG screenshots much larger (due to how dithering works).
It will also slightly brighten the scene's dark areas.

As a result, it should be enabled only when banding is noticeable enough.

This closes #17006.
2020-08-14 23:12:33 +02:00
Juan Linietsky
6a5ecfdef1 Restored fog (non volumetric).
Uses a simpler and more intuitive implementation based on density.
Its less flexible than before, but its easier to get nice results.
2020-08-13 22:09:22 -03:00
Juan Linietsky
079ca220e1 Added volumetric fog effect. 2020-08-13 11:28:45 -03:00
clayjohn
cf07a58a5f Improve the quick hash function for all GPUs 2020-08-01 17:48:40 -07:00
Brian Semrau
63dfe79fbe Fixed next_pass materials not being drawn 2020-07-28 10:51:41 -04:00
Aaron Franke
56e2c6c704
Make all String float conversion methods be 64-bit 2020-07-27 18:38:53 -04:00
Juan Linietsky
acf32e87d5 Fixes RenderingServer crashes reported by #39951
Supersedes #40026
2020-07-23 07:58:23 -03:00
Juan Linietsky
ee7c98da7c Refactor light clustering
Move from high end to shared, so all renderers use clustering.
2020-07-22 20:39:51 -03:00
Rémi Verschelde
a5fb445121
Merge pull request #40450 from asmaloney/spelling
Fix spelling & grammar in comments, docs, and messages
2020-07-21 22:14:04 +02:00
Andy Maloney
4dda62f591 Fix spelling & grammar in comments, docs, and messages 2020-07-21 15:17:23 -04:00
Andy Maloney
8b949918b1 Fix spelling of a var, a struct, and message output 2020-07-17 12:02:06 -04:00
Yuri Roubinsky
01950553f2 Fix some incorrect conversions which lead to crash in shaders 2020-07-14 21:04:12 +03:00
Rémi Verschelde
9678a41b19
Merge pull request #40272 from clayjohn/VULKAN-time-slicing
Add incremental update mode to sky
2020-07-11 10:00:39 +02:00
clayjohn
a54f93c169 Add incremental update mode to sky 2020-07-11 00:10:15 -07:00
Yuri Roubinsky
3eeb272b2e Enables 'fma' for GLES2 2020-07-10 22:21:22 +03:00
Yuri Roubinsky
ecb5f7ea23 Added 'fma' function to shader language 2020-07-10 19:58:03 +03:00
Rémi Verschelde
9000e59650
Merge pull request #40016 from akien-mga/environment-code-cleanup
Environment: Refactor code for readability + more
2020-07-01 16:28:48 +02:00
Rémi Verschelde
a8a2769bb6
Merge pull request #38713 from aaronfranke/string-64bit
Make all String integer conversion methods be 64-bit
2020-07-01 16:01:05 +02:00
Rémi Verschelde
372136fe75 Environment: Refactor code for readability + more
- Makes all boolean setters/getters consistent.
- Fixes bug where `glow_hdr_bleed_scale` was not used.
- Split CameraEffects to their own source file.
- Reorder all Environment method and properties declarations,
  definitions and bindings to be consistent with each other
  and with the order of property bindings.
- Bind missing enum values added with SDFGI.
- Remove unused SDFGI enhance_ssr boolean.
- Sync doc changes after SDFGI merge and other misc changes.
2020-07-01 14:44:45 +02:00
Yuri Roubinsky
c554d9e556 Added const qualifier support for function arguments in shaders 2020-07-01 12:55:00 +03:00
Ignacio Etcheverry
7c3ff85c71 Fix missing DEFVAL in RenderingDevice.storage_buffer_create 2020-06-29 17:13:09 +02:00
Juan Linietsky
b1aa24ea3c Slight occlusion improvements. 2020-06-28 09:11:21 -03:00
Rémi Verschelde
ff0583770a
Merge pull request #39869 from Chaosus/shader_fix_return
Prevents usage of return in main shader functions
2020-06-27 17:03:42 +02:00
Yuri Roubinsky
2ce77e4b57 Prevents usage of return in main shader functions 2020-06-27 17:36:45 +03:00
qarmin
997d367b51 Fixes recently introduced shader leaks 2020-06-27 15:08:20 +02:00
Juan Linietsky
201d606b3d Addition of SDFGI for open world global illumination
Move GI to a deferred pass
2020-06-26 11:06:48 -03:00
Yuri Roubinsky
b6ca9536f2 Fix few places in shaders where const passing still incorrect 2020-06-25 10:40:19 +03:00
Yuri Roubinsky
636a9d9f50 Implemented global const array to shaders 2020-06-19 16:04:54 +03:00
jfons
af3f9a854e Minor fix on GLSL shader parser 2020-06-06 19:53:16 +02:00
Yuri Roubinsky
1a7e101324 Fix shader's length() function parsing in expressions 2020-06-03 19:39:48 +03:00
Aaron Franke
e5ae89775a
Remove 32-bit String hex_to_int method 2020-06-03 00:03:34 -04:00
lawnjelly
61b3eb3b28 Light2D shadow mask construction fix
When using the default setting (layer 1 set only) nothing is stored in the tscn file for a Light2D, hence it relies on the value in the constructor.

The problem is the constructed value is 1 in Light2D, and -1 in RasterizerCanvas::Light. -1 results in all bits being set so all occluders are shown, rather than just those in layer 1.

This PR changes Rasterizer::Canvas constructor to set to 1. An alternative is to have -1 as the value for layer 1 throughout.

(cherry picked from commit bf54fa5a62)
2020-06-02 10:37:01 +02:00
Andrii Doroshenko (Xrayez)
69d5de632e Split Geometry singleton into Geometry2D and Geometry3D
Extra `_2d` suffixes are removed from 2D methods accoringly.
2020-05-27 14:28:34 +03:00
Arman
48a59e6c4a Continue tracing screen space reflection after encountering sky
Instead of breaking the whole trace when encountering the sky/camera far clip, continue tracing and check if "hits" are sky/far clip or not. Prevents some objects not being reflected due to gaps.
2020-05-22 00:12:42 -07:00
Rémi Verschelde
c74d65cec8 GLSL: Change shader type specifier from [vertex] to #[vertex]
The added `#` prevents clang-format from misinterpreting the meaning
of this statement and thus messing up the formatting of the next
lines up until the first `layout` statement.

Similarly, a semicolon is now enforced on `versions` defines to
prevent clang-format from messing up formatting and putting them
all on a single line. Note: In its current state the code will
ignore chained statements on a single line separated by a semicolon.

Also removed some extraneous lines missed in previous style changes
or added by mistake with said changes (e.g. after uniform definitions
that clang-format messes up somewhat too, but we live with it).
2020-05-18 10:58:14 +02:00
Rémi Verschelde
0ee0fa42e6 Style: Enforce braces around if blocks and loops
Using clang-tidy's `readability-braces-around-statements`.
https://clang.llvm.org/extra/clang-tidy/checks/readability-braces-around-statements.html
2020-05-14 21:57:34 +02:00
Rémi Verschelde
07bc4e2f96 Style: Enforce separation line between function definitions
I couldn't find a tool that enforces it, so I went the manual route:
```
find -name "thirdparty" -prune \
  -o -name "*.cpp" -o -name "*.h" -o -name "*.m" -o -name "*.mm" \
  -o -name "*.glsl" > files
perl -0777 -pi -e 's/\n}\n([^#])/\n}\n\n\1/g' $(cat files)
misc/scripts/fix_style.sh -c
```

This adds a newline after all `}` on the first column, unless they
are followed by `#` (typically `#endif`). This leads to having lots
of places with two lines between function/class definitions, but
clang-format then fixes it as we enforce max one line of separation.

This doesn't fix potential occurrences of function definitions which
are indented (e.g. for a helper class defined in a .cpp), but it's
better than nothing. Also can't be made to run easily on CI/hooks so
we'll have to be careful with new code.

Part of #33027.
2020-05-14 16:54:55 +02:00
Rémi Verschelde
0be6d925dc Style: clang-format: Disable KeepEmptyLinesAtTheStartOfBlocks
Which means that reduz' beloved style which we all became used to
will now be changed automatically to remove the first empty line.

This makes us lean closer to 1TBS (the one true brace style) instead
of hybridating it with some Allman-inspired spacing.

There's still the case of braces around single-statement blocks that
needs to be addressed (but clang-format can't help with that, but
clang-tidy may if we agree about it).

Part of #33027.
2020-05-14 16:54:55 +02:00
Rémi Verschelde
dcd1151d77 Enforce use of bool literals instead of integers
Using clang-tidy's `modernize-use-bool-literals`.
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-bool-literals.html
2020-05-14 13:45:01 +02:00
Rémi Verschelde
1a8167867b Modernize remaining uses of 0/NULL instead of nullptr (C++11)
Using clang-tidy's `modernize-use-nullptr`.
https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-nullptr.html
2020-05-14 13:45:01 +02:00
Rémi Verschelde
1f6f364a56 Port member initialization from constructor to declaration (C++11)
Using `clang-tidy`'s `modernize-use-default-member-init` check and
manual review of the changes, and some extra manual changes that
`clang-tidy` failed to do.

Also went manually through all of `core` to find occurrences that
`clang-tidy` couldn't handle, especially all initializations done
in a constructor without using initializer lists.
2020-05-14 10:01:56 +02:00
qarmin
d27f640a32 Fixes memory leak with lightmap part 2 2020-05-12 10:11:17 +02:00
qarmin
84867275bb Fix memory leak with light maps 2020-05-11 21:04:39 +02:00
Juan Linietsky
1bea8e1eac New lightmapper
-Added LocalVector (needed it)
-Added stb_rect_pack (It's pretty cool, we could probably use it for other stuff too)
-Fixes and changes all around the place
-Added library for 128 bits fixed point (required for Delaunay3D)
2020-05-10 15:59:09 -03:00
Rémi Verschelde
94721f5ab8 Revert "Renamed plane's d to distance"
This reverts commit ec7b481170.

This was wrong, `d` is not a distance but the `d` constant in the
parametric equation `ax + by + cz = d` describing the plane.
2020-05-10 16:47:11 +02:00
Rémi Verschelde
69de7ce38c Style: clang-format: Disable AllowShortCaseLabelsOnASingleLine
Part of #33027.
2020-05-10 13:13:54 +02:00
Rémi Verschelde
e956e80c1f Style: clang-format: Disable AllowShortIfStatementsOnASingleLine
Part of #33027, also discussed in #29848.

Enforcing the use of brackets even on single line statements would be
preferred, but `clang-format` doesn't have this functionality yet.
2020-05-10 13:12:16 +02:00
Rémi Verschelde
03b13e0c69 Style: Add missing copyright headers 2020-05-10 13:12:16 +02:00
Marcus Elg
ec7b481170 Renamed plane's d to distance 2020-05-10 12:12:51 +02:00
Hugo Locurcio
3a11baaeac
Turn the anisotropic filtering setting into an enum
Since it only accepts power-of-two values, exposing it as an enum
makes more sense. This also allows for adding property hints to indicate
the performance cost of each value.

This also improves property hints for MSAA and FXAA.
2020-05-08 12:07:35 +02:00
Rémi Verschelde
bef52957d0
Merge pull request #38226 from Calinou/increase-camera3d-fov
Increase the default Camera3D field of view to 75
2020-05-07 21:16:21 +02:00
clayjohn
34ee273e20 Calculate sun diameter even when not using shadows 2020-05-01 22:22:35 -07:00
Hugo Locurcio
ccc4f3899c
Increase the default Camera3D field of view to 75
A vertical FOV of 75 degrees is roughly equivalent to a 91 degree
horizontal FOV on a 4:3 display (~107.51 degrees on 16:9),
which is close to the typical default FOV used in PC games.

Note that this doesn't apply to the in-editor camera which keeps its
FOV to 70. This is because it doesn't display in fullscreen;
its viewport only displays in the center of the editor (roughly).
This means the viewport won't cover the viewer's eyes as much. Therefore,
the editor camera FOV should be slightly lower to account for this.

Since this changes the default value, this may break existing projects
slightly.

For the record, this was already done in
https://github.com/godotengine/godot-demo-projects/pull/260
for the official demo projects.
2020-05-01 14:03:27 +02:00
Rémi Verschelde
b4a5bbaea2
Merge pull request #38337 from RandomShaper/time_rollback
Improve shader time roll over
2020-04-30 16:25:20 +02:00
Pedro J. Estébanez
f7706659b5 Improve shader time roll over
- Resurrect it for GL ES 2
- Add it to the Vulkan rasterizer
- Expose the setting from the `RenderingServer`, since it does not belong in any specific rasterizer
2020-04-30 11:42:11 +02:00
Kiri Jolly
459cab99f4 Fixed unbounded dual-paraboloid shadow map culling.
Dual paraboloid shadowmaps were ending up with infinitely large volumes of area behind the hemisphere un-culled.

This change just adds a back plane to the convex shape used for the culling volume.
2020-04-29 19:24:43 -07:00
Rémi Verschelde
58435b0c91
Merge pull request #20371 from aaronfranke/vector-lerp
[Core] [Mono] [GDNative] Rename "linear_interpolate" methods to "lerp"
2020-04-29 15:50:00 +02:00
Rémi Verschelde
1d45a269f8
Merge pull request #38302 from qarmin/format_set
RasterizerStorageRD: Don't override format value
2020-04-29 14:16:52 +02:00
Aaron Franke
540156b387
[Core] Rename linear_interpolate to lerp 2020-04-29 04:02:49 -04:00
Rémi Verschelde
0bf6a86db4
Merge pull request #37795 from Chaosus/shader_fix_const_order2
Fix shader constant sorting
2020-04-29 09:41:34 +02:00
qarmin
ad6bcea49d Don't override format value 2020-04-28 18:51:17 +02:00
qarmin
0e9942a671 Fix copy paste array index bug 2020-04-28 18:26:57 +02:00
bruvzg
2bb119c088
Fix "redefinition of 'ssr' with a different type" shader compile error. 2020-04-23 13:56:04 +03:00
Ignacio Etcheverry
c5a721f58d Fix missing DEFVAL for RenderingDevice.index_buffer_create 2020-04-22 16:52:04 +02:00
Juan Linietsky
f8ef38efed Add proper type to most public API uses of Array 2020-04-21 12:16:45 -03:00
Juan Linietsky
ae09b55a19 Exposed RenderingDevice to script API
Also added an easier way to load native GLSL shaders.

Extras:

Had to fix no-cache for subresources in resource loader, it was not properly working, making shaders not properly reload.

Note:

The precommit hooks are broken because they don't seem to support enums from one class being used in another.
Feel free to fix this after merging this PR.
2020-04-20 21:21:58 -03:00
Juan Linietsky
49d0c6a5c9 Ability to create local RenderingDevice instances. 2020-04-18 21:47:17 -03:00
Rémi Verschelde
17304f1aae
Merge pull request #37949 from reduz/implement-global-shader-uniforms
Implement global and per instance shader uniforms.
2020-04-17 18:36:06 +02:00
Rémi Verschelde
cfda0e3770
Merge pull request #37953 from clayjohn/VULKAN-sky-sun-size
Add light size to Sky Shaders
2020-04-17 18:35:45 +02:00
clayjohn
7cd2ff309c Add light size to Sky Shaders 2020-04-17 09:32:24 -07:00
Juan Linietsky
0e1c66d9fc Implement global and per instance shader uniforms.
Adds two keywords to shader language for uniforms:
-'global'
-'instance'

This allows them to reference values outside the material.
2020-04-17 12:35:41 -03:00
clayjohn
0ff929a926 Use sky properly for ambient and reflections 2020-04-16 23:45:30 -07:00
clayjohn
61d86190e0 Fix texture check in decal setup 2020-04-15 12:06:02 -07:00
Juan Linietsky
6f293ed795 Add support for projectors in spot and omni lights. 2020-04-14 17:05:45 -03:00
Rémi Verschelde
5e5103f460
Merge pull request #37861 from reduz/implement-decals
Implement decals
2020-04-14 17:13:20 +02:00
Juan Linietsky
5944eb6e7f Implement decals
Also implemented decal atlas, so projectors and other stuff can be added.
Sidenote: Had to make RID hashable, so some unrelated includes changed
in order to include it in hashfuncs.h
2020-04-14 11:13:34 -03:00
qarmin
88c0a9e3de Fixes leak with CopyToFbShaderRD 2020-04-13 11:39:44 +02:00
Rémi Verschelde
06748a2b5f
Merge pull request #37749 from clayjohn/Vulkan-improved-ss
Add vogel filter and settings to soft shadows
2020-04-13 00:39:37 +02:00
Juan Linietsky
a57dc398db Implement MSAA 2020-04-12 15:33:57 -03:00
Juan Linietsky
16ae2cc1bf Add screen space AA option, with FXAA implementation. 2020-04-12 10:57:18 -03:00
Juan Linietsky
9dc19f7619
Merge pull request #37808 from reduz/port-effects-to-compute
Moved most of the effect code to compute.
2020-04-11 23:38:05 -03:00
Juan Linietsky
d81911490b Moved most of the effect code to compute.
Simplifies it and improves performance.
Improves image barrier handling per mipmap on RenderingDeviceVulkan
2020-04-11 19:44:07 -03:00
Rémi Verschelde
636d4bad99
Merge pull request #37794 from clayjohn/VULKAN-SSS-sky
Fix SSS affecting Sky
2020-04-11 16:30:51 +02:00
Yuri Roubinsky
bc30f541e6 Fix shader constant sorting 2020-04-11 12:40:17 +03:00
clayjohn
e3a9af2db1 Fix SSS affecting Sky 2020-04-11 01:20:24 -07:00
clayjohn
621f6f09a8 Add proper quality settings to soft shadows 2020-04-10 23:09:17 -07:00
Juan Linietsky
d06f8ef75a Shows proper scene render time in editor info
Also fixed GPU profiler, which was not working on nvidia hardware.
2020-04-10 14:19:30 -03:00
Rémi Verschelde
a152ef9a10
Merge pull request #37662 from qarmin/rasterizer_server_last
Free items before finishing rendering server
2020-04-10 11:50:13 +02:00
Rémi Verschelde
c2f0d58c36
Merge pull request #37722 from reduz/implement-softshadows
Support light size and soft shadows
2020-04-10 10:24:57 +02:00
Juan Linietsky
6a730ffeab Support light size and soft shadows 2020-04-09 15:11:15 -03:00
Bastiaan Olij
afc8c6391c Renaming all ARVR nodes to XR 2020-04-09 15:33:01 +10:00
Juan Linietsky
4ffc0d6b3f Refactored shadowmapping.
- Made shadow bias size independent, so it will remain when changing light or camera size.
- Implemented normal offset bias, which greatly enhances quality.
- Added transmission to subsurface scattering
- Reimplemented shadow filter modes

Closes #17260
2020-04-08 11:19:43 -03:00
qarmin
b5fd03fc36 Free items before finishing rendering server 2020-04-07 19:12:07 +02:00
qarmin
853f677c7e Fixed leak with SpecularMergeShaderRD 2020-04-04 17:48:30 +02:00
Juan Linietsky
c54f80d35c Re-implement subsurface scattering.
The size settings are more "just works", with default scale and depth scale
values that don't need much tweaking.

Additionally, a "skin" mode was added so skin looks better.
EDIT: Cleaned up SSR filter shader a bit.
2020-04-04 11:44:28 -03:00
Rémi Verschelde
aeb95ef006
Merge pull request #37438 from clayjohn/VULKAN-sky-invert
Invert Sky subpass cubemap z direction
2020-04-03 15:59:26 +02:00
Rémi Verschelde
6a38ce1b31
Merge pull request #37512 from reduz/implement-ssr
Re-Added screen space reflection.
2020-04-02 17:17:27 +02:00
Juan Linietsky
87c658b304 Re-Added screen space reflection. 2020-04-02 11:25:21 -03:00
lupoDharkael
95a1400a2a Replace NULL with nullptr 2020-04-02 13:38:00 +02:00
Rémi Verschelde
5f11e15571
Merge pull request #37504 from qarmin/out_of_bound_cursor
Fix array out of bounds access caused by uninitialised variables
2020-04-02 13:07:55 +02:00
Rafał Mikrut
359bebd8c0 Fix out of bound array access caused by unassigned variable 2020-04-01 19:29:35 +02:00
Rémi Verschelde
0a2fa4d892 Fix more -Wmaybe-uninitialized warnings with target=release_debug
I have no idea why those don't get triggered in target=debug builds.

Fixes #37461.
2020-03-31 13:52:42 +02:00
clayjohn
be9235e499 Invert subpass cubemap z direction 2020-03-30 10:42:45 -07:00
Juan Linietsky
89e1263117 Move glow upscale quality to a global setting, for consistency 2020-03-30 10:46:03 -03:00
Rémi Verschelde
cd4e46ee65 SCons: Format buildsystem files with psf/black
Configured for a max line length of 120 characters.

psf/black is very opinionated and purposely doesn't leave much room for
configuration. The output is mostly OK so that should be fine for us,
but some things worth noting:

- Manually wrapped strings will be reflowed, so by using a line length
  of 120 for the sake of preserving readability for our long command
  calls, it also means that some manually wrapped strings are back on
  the same line and should be manually merged again.

- Code generators using string concatenation extensively look awful,
  since black puts each operand on a single line. We need to refactor
  these generators to use more pythonic string formatting, for which
  many options are available (`%`, `format` or f-strings).

- CI checks and a pre-commit hook will be added to ensure that future
  buildsystem changes are well-formatted.
2020-03-30 09:05:53 +02:00
Yuri Roubinsky
aa33db056a Prevent shader crash if multiple variables has been declared in 'for' 2020-03-28 19:51:42 +03:00
Rémi Verschelde
60d486acc8 Fix copyright headers for recently added files 2020-03-28 13:29:29 +01:00
Rémi Verschelde
0c320a6bf3 More server renames for consistency after #37361 2020-03-28 13:20:48 +01:00
Juan Linietsky
a6f3bc7c69 Renaming of servers for coherency.
VisualServer -> RenderingServer
PhysicsServer -> PhysicsServer3D
Physics2DServer -> PhysicsServer2D
NavigationServer -> NavigationServer3D
Navigation2DServer -> NavigationServer2D

Also renamed corresponding files.
2020-03-27 15:21:27 -03:00