Multiresolution Light Sampling — Handmade Hero — Episode Guide

0:00Recap and set the stage for the day working on the lighting

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0:00Recap and set the stage for the day working on the lighting

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0:00Recap and set the stage for the day working on the lighting

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1:37Run the game to show our current lighting situation whose stability is dependent on the rays

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1:37Run the game to show our current lighting situation whose stability is dependent on the rays

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1:37Run the game to show our current lighting situation whose stability is dependent on the rays

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4:14Wax lyrical on serge_rgb's wonderful work on milton

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4:14Wax lyrical on serge_rgb's wonderful work on milton

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4:14Wax lyrical on serge_rgb's wonderful work on milton

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5:49Lighting mods

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5:49Lighting mods

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5:49Lighting mods

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7:101. Stratified Sampling, including white noise

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7:101. Stratified Sampling, including white noise

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7:101. Stratified Sampling, including white noise

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13:52White vs Blue noise¹

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13:52White vs Blue noise¹

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13:52White vs Blue noise¹

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17:33Light perception

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17:33Light perception

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17:33Light perception

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19:27Blue noise, with a mention of the Witness Wednesday glass-planting system²

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19:27Blue noise, with a mention of the Witness Wednesday glass-planting system²

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19:27Blue noise, with a mention of the Witness Wednesday glass-planting system²

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21:47Performing stratified sampling

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21:47Performing stratified sampling

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21:47Performing stratified sampling

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25:182. "Multires sampling"

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25:182. "Multires sampling"

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25:182. "Multires sampling"

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28:463. "Bidirectional sampling"

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28:463. "Bidirectional sampling"

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28:463. "Bidirectional sampling"

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31:52Make PlayWorld() generate 16 screens

32:23Run the game and inspect the profiler, with the determination to get multiresolution sampling working

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32:23Run the game and inspect the profiler, with the determination to get multiresolution sampling working

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32:23Run the game and inspect the profiler, with the determination to get multiresolution sampling working

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34:11Read through the current lighting code with a view to implementing multiresolution sampling, with synthetic light indices for neighbouring spatial partitions to use

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34:11Read through the current lighting code with a view to implementing multiresolution sampling, with synthetic light indices for neighbouring spatial partitions to use

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34:11Read through the current lighting code with a view to implementing multiresolution sampling, with synthetic light indices for neighbouring spatial partitions to use

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38:46Introduce the notion of an ExtendedPointCount in lighting_solution, to store synthetic lighting data

45:27Producing the data for the synthetic lighting elements^α

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45:27Producing the data for the synthetic lighting elements^α

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45:27Producing the data for the synthetic lighting elements^α

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49:48Make SplitBox() produce the extended lighting points from the average of all points in their box

1:02:15Run the game to see the total lighting solution, and determine to produce some debug visualisation of the spatial hierarchy

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1:02:15Run the game to see the total lighting solution, and determine to produce some debug visualisation of the spatial hierarchy

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1:02:15Run the game to see the total lighting solution, and determine to produce some debug visualisation of the spatial hierarchy

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1:04:20Introduce OutputLightingPointsRecurse() to produce debug visualisation for the lighting system's entire spatial hierarchy

1:10:47Step in to OutputLightingPoints() to realise that we are indirected

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1:10:47Step in to OutputLightingPoints() to realise that we are indirected

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1:10:47Step in to OutputLightingPoints() to realise that we are indirected

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1:13:33Make OutputLightingPoints() and SplitBox() use GetBox()

1:15:11Run the game to see our lighting debug visualisation

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1:15:11Run the game to see our lighting debug visualisation

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1:15:11Run the game to see our lighting debug visualisation

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1:16:06Make OutputLightingPointsRecurse() size the debug visualisation lighting boxes proportionally to their depth in the hierarchy

1:20:06Run the game to see our proportionally-sized lighting debug visualisation

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1:20:06Run the game to see our proportionally-sized lighting debug visualisation

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1:20:06Run the game to see our proportionally-sized lighting debug visualisation

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1:21:01Provide the ability in UpdateAndRenderWorld() to adjust the depth hierarchy

1:22:15Run the game and inspect our entire lighting hierarchy

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1:22:15Run the game and inspect our entire lighting hierarchy

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1:22:15Run the game and inspect our entire lighting hierarchy

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1:24:03Make SplitBox() set the AccumulatedPPS to the InitialPPS

1:25:31Run the game and inspect our entire lighting hierarchy

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1:25:31Run the game and inspect our entire lighting hierarchy

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1:25:31Run the game and inspect our entire lighting hierarchy

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1:27:06Prevent OutputLightingPointsRecurse() from including the emission of a childless light source

1:27:37Run the game to see that that doesn't fix our problem

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1:27:37Run the game to see that that doesn't fix our problem

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1:27:37Run the game to see that that doesn't fix our problem

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1:32:14Enable RayCastRecurse() to recurse to a given depth

1:33:35Run the game and watch the RayCastBoxCount while adjusting the depth in RayCastRecurse()

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1:33:35Run the game and watch the RayCastBoxCount while adjusting the depth in RayCastRecurse()

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1:33:35Run the game and watch the RayCastBoxCount while adjusting the depth in RayCastRecurse()

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1:35:01Make PlayWorld() create larger rooms

1:35:33Run the game and again watch the RayCastBoxCount while adjusting the depth in RayCastRecurse()

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1:35:33Run the game and again watch the RayCastBoxCount while adjusting the depth in RayCastRecurse()

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1:35:33Run the game and again watch the RayCastBoxCount while adjusting the depth in RayCastRecurse()

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1:38:29Step in to LightingTest() to inspect the PointCount

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1:38:29Step in to LightingTest() to inspect the PointCount

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1:38:29Step in to LightingTest() to inspect the PointCount

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1:40:08Make LightingTest() use a temporary variable for the PointCount before giving it to the DEBUG_VALUE

1:40:31Run the game to determine that we have a bug in how we output u16s

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1:40:31Run the game to determine that we have a bug in how we output u16s

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1:40:31Run the game to determine that we have a bug in how we output u16s

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1:40:37Add padding in lighting_solution after PointCount

1:41:46Run the game to see that that fixes it

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1:41:46Run the game to see that that fixes it

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1:41:46Run the game to see that that fixes it

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1:42:37Add a u16 handler in DEBUGValueSetEventData

1:45:48Run the game to see that our PointCount is displayed correctly, but that our RayCastBoxCount seems to be too high

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1:45:48Run the game to see that our PointCount is displayed correctly, but that our RayCastBoxCount seems to be too high

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1:45:48Run the game to see that our PointCount is displayed correctly, but that our RayCastBoxCount seems to be too high

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1:49:42Augment lighting_solution with some more meaningful counters

1:56:44Run the game and inspect lighting data in the profiler

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1:56:44Run the game and inspect lighting data in the profiler

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1:56:44Run the game and inspect lighting data in the profiler

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1:58:13Force RayCastRecurse() never to recurse

1:58:30Run the game to see that TotalPartitionsTested did not go down much

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1:58:30Run the game to see that TotalPartitionsTested did not go down much

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1:58:30Run the game to see that TotalPartitionsTested did not go down much

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2:00:24Read carefully through RayCastRecurse()

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2:00:24Read carefully through RayCastRecurse()

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2:00:24Read carefully through RayCastRecurse()

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2:01:36Run the game and watch the TotalLeavesTested when recursing or not

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2:01:36Run the game and watch the TotalLeavesTested when recursing or not

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2:01:36Run the game and watch the TotalLeavesTested when recursing or not

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2:02:52Try making PlayWorld() create more layers

2:04:46Run the game and now watch TotalLeavesTested() when recursing or not, to see that, when it doesn't recurse, it goes down much more now that there is a layer of geometry above use

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2:04:46Run the game and now watch TotalLeavesTested() when recursing or not, to see that, when it doesn't recurse, it goes down much more now that there is a layer of geometry above use

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2:04:46Run the game and now watch TotalLeavesTested() when recursing or not, to see that, when it doesn't recurse, it goes down much more now that there is a layer of geometry above use

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2:07:28Q&A

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2:07:28Q&A

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2:07:28Q&A

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2:09:03jamoflaw Q: Can you explain why was the debug output behaving odd with u16s?

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2:09:03jamoflaw Q: Can you explain why was the debug output behaving odd with u16s?

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2:09:03jamoflaw Q: Can you explain why was the debug output behaving odd with u16s?

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2:12:47mathdaemon Q: How likely is a lighting system GPU port still?

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2:12:47mathdaemon Q: How likely is a lighting system GPU port still?

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2:12:47mathdaemon Q: How likely is a lighting system GPU port still?

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2:13:19graemephi Q: (Off-topic) Did you ever find out if it's necessary for CPUs to have named registers?

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2:13:19graemephi Q: (Off-topic) Did you ever find out if it's necessary for CPUs to have named registers?

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2:13:19graemephi Q: (Off-topic) Did you ever find out if it's necessary for CPUs to have named registers?

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2:15:38ataradov Look at Mill CPU. It has no registers, but it is also a vaporware as far as physical implementations go

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2:15:38ataradov Look at Mill CPU. It has no registers, but it is also a vaporware as far as physical implementations go

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2:15:38ataradov Look at Mill CPU. It has no registers, but it is also a vaporware as far as physical implementations go

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2:17:21longboolean Q: Do you think arranging pixels on LCD monitors in a blue noise pattern would be an improvement visually, I assume the costs to manufacture would sky rocket, or are we just better off making the pixels smaller?

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2:17:21longboolean Q: Do you think arranging pixels on LCD monitors in a blue noise pattern would be an improvement visually, I assume the costs to manufacture would sky rocket, or are we just better off making the pixels smaller?

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2:17:21longboolean Q: Do you think arranging pixels on LCD monitors in a blue noise pattern would be an improvement visually, I assume the costs to manufacture would sky rocket, or are we just better off making the pixels smaller?

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2:18:20ataradov Q: Memory is slow

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2:18:20ataradov Q: Memory is slow

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2:18:20ataradov Q: Memory is slow

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2:18:35Close down

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2:18:35Close down

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2:18:35Close down

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