Half-resolution Spatial Grid
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0:00Recap and set the stage for the day
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0:00Recap and set the stage for the day
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0:00Recap and set the stage for the day
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0:27Briefly show the current lighting
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0:27Briefly show the current lighting
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0:27Briefly show the current lighting
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0:37Describe the new inline lighting grid traversal
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0:37Describe the new inline lighting grid traversal
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0:37Describe the new inline lighting grid traversal
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2:45Table-driven Raycast
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2:45Table-driven Raycast
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2:45Table-driven Raycast
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5:21Correspondence Between the Lighting and Spatial Grids
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5:21Correspondence Between the Lighting and Spatial Grids
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5:21Correspondence Between the Lighting and Spatial Grids
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8:28Storage costs and compressibility of grid correspondence
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8:28Storage costs and compressibility of grid correspondence
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8:28Storage costs and compressibility of grid correspondence
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11:53High-resolution lighting grid marching, before stepping down to the low-resolution spatial grid
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11:53High-resolution lighting grid marching, before stepping down to the low-resolution spatial grid
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11:53High-resolution lighting grid marching, before stepping down to the low-resolution spatial grid
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15:08Prepare to define a lower resolution spatial occupancy grid
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15:08Prepare to define a lower resolution spatial occupancy grid
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15:08Prepare to define a lower resolution spatial occupancy grid
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15:57Toggle off the inline lighting grid traversal in GridRayCast()
15:57Toggle off the inline lighting grid traversal in GridRayCast()
15:57Toggle off the inline lighting grid traversal in GridRayCast()
16:18hhlightprof total seconds elapsed: 4.453437
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16:18hhlightprof total seconds elapsed: 4.453437
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16:18hhlightprof total seconds elapsed: 4.453437
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17:50Consider how to reduce the spatial grid resolution
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17:50Consider how to reduce the spatial grid resolution
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17:50Consider how to reduce the spatial grid resolution
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19:28Halve the SpatialGrid resolution in ProfileRun(), updating ComputeLightPropagation() to account for this
19:28Halve the SpatialGrid resolution in ProfileRun(), updating ComputeLightPropagation() to account for this
19:28Halve the SpatialGrid resolution in ProfileRun(), updating ComputeLightPropagation() to account for this
26:14hhlightprof BoxCount[0]: 1400
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26:14hhlightprof BoxCount[0]: 1400
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26:14hhlightprof BoxCount[0]: 1400
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26:41Fix the SpatialGrid apron size in ProfileRun()
26:41Fix the SpatialGrid apron size in ProfileRun()
26:41Fix the SpatialGrid apron size in ProfileRun()
27:21hhlightprof BoxCount[0]: 1400
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27:21hhlightprof BoxCount[0]: 1400
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27:21hhlightprof BoxCount[0]: 1400
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27:37Build in -Od
27:37Build in -Od
27:37Build in -Od
28:00Step through ProfileRun() and inspect the SpatialGrid
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28:00Step through ProfileRun() and inspect the SpatialGrid
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28:00Step through ProfileRun() and inspect the SpatialGrid
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29:12Make ProfileRun() position the SpatialGrid using SetMinCorner()
29:12Make ProfileRun() position the SpatialGrid using SetMinCorner()
29:12Make ProfileRun() position the SpatialGrid using SetMinCorner()
31:20hhlightprof BoxCount[0]: 1400
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31:20hhlightprof BoxCount[0]: 1400
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31:20hhlightprof BoxCount[0]: 1400
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31:37Step through ProfileRun() and inspect the SpatialGrid
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31:37Step through ProfileRun() and inspect the SpatialGrid
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31:37Step through ProfileRun() and inspect the SpatialGrid
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31:46Make ProfileRun() account for the lower resolution when setting SpatialMinCorner
31:46Make ProfileRun() account for the lower resolution when setting SpatialMinCorner
31:46Make ProfileRun() account for the lower resolution when setting SpatialMinCorner
33:41hhlightprof box distribution: More desirable
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33:41hhlightprof box distribution: More desirable
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33:41hhlightprof box distribution: More desirable
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35:00cachurai Statistically speaking, how much of Twitch chat do you think understands the principles the streamer is transmitting?
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35:00cachurai Statistically speaking, how much of Twitch chat do you think understands the principles the streamer is transmitting?
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35:00cachurai Statistically speaking, how much of Twitch chat do you think understands the principles the streamer is transmitting?
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35:27Assess our box distribution
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35:27Assess our box distribution
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35:27Assess our box distribution
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36:38Build in -O2
36:38Build in -O2
36:38Build in -O2
37:01hhlightprof total seconds elapsed: 4.673890
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37:01hhlightprof total seconds elapsed: 4.673890
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37:01hhlightprof total seconds elapsed: 4.673890
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38:14Toggle off the SpatialGrid downscaling in ProfileRun()
38:14Toggle off the SpatialGrid downscaling in ProfileRun()
38:14Toggle off the SpatialGrid downscaling in ProfileRun()
38:37Introduce voxel_sparse_index and SparseIndexFrom()
38:37Introduce voxel_sparse_index and SparseIndexFrom()
38:37Introduce voxel_sparse_index and SparseIndexFrom()
45:49Revert voxel_sparse_index and SparseIndexFrom()
45:49Revert voxel_sparse_index and SparseIndexFrom()
45:49Revert voxel_sparse_index and SparseIndexFrom()
45:56Why safely build the additional tables
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45:56Why safely build the additional tables
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45:56Why safely build the additional tables
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46:44Expand the LightSamplingWalkTable in lighting_solution and introduce GetOctantFor() to correctly index into it
46:44Expand the LightSamplingWalkTable in lighting_solution and introduce GetOctantFor() to correctly index into it
46:44Expand the LightSamplingWalkTable in lighting_solution and introduce GetOctantFor() to correctly index into it
56:09Decrease MaxCostPerRay from 16 to 8 in UpdateLighting() and ProfileRun()
56:09Decrease MaxCostPerRay from 16 to 8 in UpdateLighting() and ProfileRun()
56:09Decrease MaxCostPerRay from 16 to 8 in UpdateLighting() and ProfileRun()
58:06Make ComputeWalkTable() build all eight octants of the LightSamplingWalkTable
58:06Make ComputeWalkTable() build all eight octants of the LightSamplingWalkTable
58:06Make ComputeWalkTable() build all eight octants of the LightSamplingWalkTable
1:02:45On indexing mismatch bugs
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1:02:45On indexing mismatch bugs
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1:02:45On indexing mismatch bugs
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1:04:36Toggle on the grid positioning code in ProfileRun()
1:04:36Toggle on the grid positioning code in ProfileRun()
1:04:36Toggle on the grid positioning code in ProfileRun()
1:05:15Crash hhlightprof
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1:05:15Crash hhlightprof
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1:05:15Crash hhlightprof
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1:05:34Change LightSamplingWalkTable to be an array of 8 in lighting_solution
1:05:34Change LightSamplingWalkTable to be an array of 8 in lighting_solution
1:05:34Change LightSamplingWalkTable to be an array of 8 in lighting_solution
1:05:46Run hhlightprof successfully
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1:05:46Run hhlightprof successfully
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1:05:46Run hhlightprof successfully
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1:06:01Build in -O2
1:06:01Build in -O2
1:06:01Build in -O2
1:06:16hhlightprof total seconds elapsed: 4.226165
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1:06:16hhlightprof total seconds elapsed: 4.226165
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1:06:16hhlightprof total seconds elapsed: 4.226165
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1:06:40Our world is unlit
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1:06:40Our world is unlit
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1:06:40Our world is unlit
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1:07:12Remove stale code from the lighting system
1:07:12Remove stale code from the lighting system
1:07:12Remove stale code from the lighting system
1:10:25Build in -Od
1:10:25Build in -Od
1:10:25Build in -Od
1:11:00Step in to GridRayCast() and inspect the LightSamplingWalkTable and indices
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1:11:00Step in to GridRayCast() and inspect the LightSamplingWalkTable and indices
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1:11:00Step in to GridRayCast() and inspect the LightSamplingWalkTable and indices
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1:14:54Remove further stale code from GridRayCast()
1:14:54Remove further stale code from GridRayCast()
1:14:54Remove further stale code from GridRayCast()
1:16:31Step through GridRayCast() watching the Node indices
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1:16:31Step through GridRayCast() watching the Node indices
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1:16:31Step through GridRayCast() watching the Node indices
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1:17:22Make UpdateLighting() halve the SpatialGrid resolution and reposition it
1:17:22Make UpdateLighting() halve the SpatialGrid resolution and reposition it
1:17:22Make UpdateLighting() halve the SpatialGrid resolution and reposition it
1:19:55Our world is lit
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1:19:55Our world is lit
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1:19:55Our world is lit
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1:20:06Build in -O2
1:20:06Build in -O2
1:20:06Build in -O2
1:20:14Admire our lighting
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1:20:14Admire our lighting
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1:20:14Admire our lighting
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1:20:42hhlightprof total seconds elapsed: 4.256591
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1:20:42hhlightprof total seconds elapsed: 4.256591
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1:20:42hhlightprof total seconds elapsed: 4.256591
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1:21:54Note down our hhlightprof lighting timing
1:21:54Note down our hhlightprof lighting timing
1:21:54Note down our hhlightprof lighting timing
1:22:38Toggle off FullCast() in ComputeLightPropagationWork()
1:22:38Toggle off FullCast() in ComputeLightPropagationWork()
1:22:38Toggle off FullCast() in ComputeLightPropagationWork()
1:23:23hhlightprof total seconds elapsed: 1.028882
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1:23:23hhlightprof total seconds elapsed: 1.028882
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1:23:23hhlightprof total seconds elapsed: 1.028882
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1:24:39Gauge our lighting performance improvement
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1:24:39Gauge our lighting performance improvement
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1:24:39Gauge our lighting performance improvement
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1:25:11Toggle off GridBuildSpatialPartition() in InternalLightingCore()
1:25:11Toggle off GridBuildSpatialPartition() in InternalLightingCore()
1:25:11Toggle off GridBuildSpatialPartition() in InternalLightingCore()
1:25:35Crash hhlightprof
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1:25:35Crash hhlightprof
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1:25:35Crash hhlightprof
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1:25:48Toggle off the SpatialGrid accessing in FullCast()
1:25:48Toggle off the SpatialGrid accessing in FullCast()
1:25:48Toggle off the SpatialGrid accessing in FullCast()
1:26:06Crash hhlightprof
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1:26:06Crash hhlightprof
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1:26:06Crash hhlightprof
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1:26:14Revert our SpatialGrid toggles, and instead toggle off the main loops in GridBuildSpatialPartition() itself
1:26:14Revert our SpatialGrid toggles, and instead toggle off the main loops in GridBuildSpatialPartition() itself
1:26:14Revert our SpatialGrid toggles, and instead toggle off the main loops in GridBuildSpatialPartition() itself
1:27:02hhlightprof total seconds elapsed: 1.035324
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1:27:02hhlightprof total seconds elapsed: 1.035324
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1:27:02hhlightprof total seconds elapsed: 1.035324
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1:27:16Revert our GridBuildSpatialPartition() toggless
1:27:16Revert our GridBuildSpatialPartition() toggless
1:27:16Revert our GridBuildSpatialPartition() toggless
1:27:37hhlightprof total seconds elapsed: 4.230452
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1:27:37hhlightprof total seconds elapsed: 4.230452
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1:27:37hhlightprof total seconds elapsed: 4.230452
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1:27:48Q&A
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1:27:48Q&A
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1:27:48Q&A
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1:28:34insobot Q: Takeover the world, yet anything thing?
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1:28:34insobot Q: Takeover the world, yet anything thing?
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1:28:34insobot Q: Takeover the world, yet anything thing?
🗪
1:28:57frostyninja Q: Missed a fair few weeks. Can you run through how the lighting looks now?
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1:28:57frostyninja Q: Missed a fair few weeks. Can you run through how the lighting looks now?
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1:28:57frostyninja Q: Missed a fair few weeks. Can you run through how the lighting looks now?
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1:31:05mougatron Q: Do you plan to implement any de-noising on the light?
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1:31:05mougatron Q: Do you plan to implement any de-noising on the light?
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1:31:05mougatron Q: Do you plan to implement any de-noising on the light?
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1:31:27nickito97 Q: Is neon any better?
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1:31:27nickito97 Q: Is neon any better?
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1:31:27nickito97 Q: Is neon any better?
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1:32:04miltondts Q: Given that AVX2 is seven years old, would it help to use it instead of SSE?1
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1:32:04miltondts Q: Given that AVX2 is seven years old, would it help to use it instead of SSE?1
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1:32:04miltondts Q: Given that AVX2 is seven years old, would it help to use it instead of SSE?1
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1:33:26mougatron Q: Skylake-X also supports AVX-512
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1:33:26mougatron Q: Skylake-X also supports AVX-512
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1:33:26mougatron Q: Skylake-X also supports AVX-512
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1:34:12mougatron Q: Skylake-X is not server. But it is true that nobody has them2
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1:34:12mougatron Q: Skylake-X is not server. But it is true that nobody has them2
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1:34:12mougatron Q: Skylake-X is not server. But it is true that nobody has them2
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1:35:33billdstrong Q: Couldn't we do two paths, one with and one without AVX2?
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1:35:33billdstrong Q: Couldn't we do two paths, one with and one without AVX2?
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1:35:33billdstrong Q: Couldn't we do two paths, one with and one without AVX2?
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1:36:35maliusarth Why is AVX-512 so uncommon?
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1:36:35maliusarth Why is AVX-512 so uncommon?
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1:36:35maliusarth Why is AVX-512 so uncommon?
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1:37:39koschei_ There are a few laptops out with Ice Lake that has AVX-512
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1:37:39koschei_ There are a few laptops out with Ice Lake that has AVX-512
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1:37:39koschei_ There are a few laptops out with Ice Lake that has AVX-512
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1:38:01Wrap it up
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1:38:01Wrap it up
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1:38:01Wrap it up
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