Analyzing the Diffuse Blur — Handmade Hero — Episode Guide

0:02Recap and set the stage for the day

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0:02Recap and set the stage for the day

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0:02Recap and set the stage for the day

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0:40Demo the lighting with different resolution spatial and lighting grids

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0:40Demo the lighting with different resolution spatial and lighting grids

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0:40Demo the lighting with different resolution spatial and lighting grids

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2:22Determine to optimise the lighting pipeline, and work on quality, smoothing out the rectilinear pattern and reducing flicker

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2:22Determine to optimise the lighting pipeline, and work on quality, smoothing out the rectilinear pattern and reducing flicker

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2:22Determine to optimise the lighting pipeline, and work on quality, smoothing out the rectilinear pattern and reducing flicker

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5:02Determine to compile at least the lighting in clang, to gauge the SIMD performance

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5:02Determine to compile at least the lighting in clang, to gauge the SIMD performance

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5:02Determine to compile at least the lighting in clang, to gauge the SIMD performance

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6:50How the ABI works on Microsoft Windows, in terms of register use

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6:50How the ABI works on Microsoft Windows, in terms of register use

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6:50How the ABI works on Microsoft Windows, in terms of register use

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10:01On the possible work getting the code to compile with clang, including its exploitation of undefined behaviour

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10:01On the possible work getting the code to compile with clang, including its exploitation of undefined behaviour

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10:01On the possible work getting the code to compile with clang, including its exploitation of undefined behaviour

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13:46hhlightprof total seconds elapsed: 4.221848

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13:46hhlightprof total seconds elapsed: 4.221848

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13:46hhlightprof total seconds elapsed: 4.221848

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13:52Determine to optimise the diffuse blur

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13:52Determine to optimise the diffuse blur

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13:52Determine to optimise the diffuse blur

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14:31Toggle off the diffuse blur in ComputeLightPropagationWork()

14:50hhlightprof total seconds elapsed: 3.233531

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14:50hhlightprof total seconds elapsed: 3.233531

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14:50hhlightprof total seconds elapsed: 3.233531

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15:15Briefly describe our diffuse blur in ComputeLightPropagationWork()

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15:15Briefly describe our diffuse blur in ComputeLightPropagationWork()

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15:15Briefly describe our diffuse blur in ComputeLightPropagationWork()

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15:59"Seperable" Filters

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15:59"Seperable" Filters

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15:59"Seperable" Filters

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18:55Example filter: Linear blend

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18:55Example filter: Linear blend

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18:55Example filter: Linear blend

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23:53Example filter: Bilinear blend

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23:53Example filter: Bilinear blend

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23:53Example filter: Bilinear blend

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27:20Example seperable filter: two-pass, one-dimensional blends

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27:20Example seperable filter: two-pass, one-dimensional blends

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27:20Example seperable filter: two-pass, one-dimensional blends

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29:16Get some tissues

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29:16Get some tissues

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29:16Get some tissues

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29:20afk

30:01Return with tissues

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30:01Return with tissues

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30:01Return with tissues

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30:20Our current cosine-weighted falloff equation

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30:20Our current cosine-weighted falloff equation

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30:20Our current cosine-weighted falloff equation

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35:47Walk through UnitVectorFromOctahedral()

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35:47Walk through UnitVectorFromOctahedral()

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35:47Walk through UnitVectorFromOctahedral()

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37:38Determine to print the weight map table

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37:38Determine to print the weight map table

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37:38Determine to print the weight map table

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39:11Regular tea break

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39:11Regular tea break

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39:11Regular tea break

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39:20afk

40:06Return with the realisation that we're at risk of infringing Jon Blow's on-stream tea-making patent

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40:06Return with the realisation that we're at risk of infringing Jon Blow's on-stream tea-making patent

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40:06Return with the realisation that we're at risk of infringing Jon Blow's on-stream tea-making patent

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40:27Make ProfileRun() print the DiffuseWeightMap to stdout

46:29hhlightprof DiffuseWeightMap: Many 0s

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46:29hhlightprof DiffuseWeightMap: Many 0s

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46:29hhlightprof DiffuseWeightMap: Many 0s

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46:51Reacquaint ourselves with the use of DiffuseWeightMap in ComputeLightPropagationWork

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46:51Reacquaint ourselves with the use of DiffuseWeightMap in ComputeLightPropagationWork

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46:51Reacquaint ourselves with the use of DiffuseWeightMap in ComputeLightPropagationWork

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48:46Make ProfileRun() print out the DiffuseWeightMap, based on BuildDiffuseLightMaps()

51:56hhlightprof DiffuseWeightMap: Sensibly populated

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51:56hhlightprof DiffuseWeightMap: Sensibly populated

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51:56hhlightprof DiffuseWeightMap: Sensibly populated

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52:20Make ProfileRun() print dashes when the Entry is 0

52:49hhlightprof DiffuseWeightMap: More visible shape

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52:49hhlightprof DiffuseWeightMap: More visible shape

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52:49hhlightprof DiffuseWeightMap: More visible shape

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53:10Regular tea break

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53:10Regular tea break

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53:10Regular tea break

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53:14afk

54:40Return, with the tea now steeping

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54:40Return, with the tea now steeping

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54:40Return, with the tea now steeping

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54:45Analyse the DiffuseWeightMap printout for reused values

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54:45Analyse the DiffuseWeightMap printout for reused values

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54:45Analyse the DiffuseWeightMap printout for reused values

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58:43Approaches to making the cosine falloff seperable: 1) Produce a somewhat similar, but regular pattern; 2) Classify values by their position

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58:43Approaches to making the cosine falloff seperable: 1) Produce a somewhat similar, but regular pattern; 2) Classify values by their position

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58:43Approaches to making the cosine falloff seperable: 1) Produce a somewhat similar, but regular pattern; 2) Classify values by their position

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59:32There's the tea

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59:32There's the tea

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59:32There's the tea

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59:37afk

1:00:17Return and pour the tea

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1:00:17Return and pour the tea

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1:00:17Return and pour the tea

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1:00:50Try making ProfileRun() print out the DiffuseWeightMap 16×16, to see the shape when it wraps

1:02:03hhlightprof DiffuseWeightMap: 16×16 shapes, and identical rows between maps

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1:02:03hhlightprof DiffuseWeightMap: 16×16 shapes, and identical rows between maps

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1:02:03hhlightprof DiffuseWeightMap: 16×16 shapes, and identical rows between maps

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1:05:17Consider changing the cosine falloff function to a basic blur

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1:05:17Consider changing the cosine falloff function to a basic blur

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1:05:17Consider changing the cosine falloff function to a basic blur

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1:06:28Accidentally add a threshold of 0.01f to BuildDiffuseLightMaps()

1:07:20hhlightprof DiffuseWeightMap: Without threshold

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1:07:20hhlightprof DiffuseWeightMap: Without threshold

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1:07:20hhlightprof DiffuseWeightMap: Without threshold

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1:07:38Add a threshold to the DiffuseWeightMap printout

1:08:13hhlightprof DiffuseWeightMap: Still without threshold

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1:08:13hhlightprof DiffuseWeightMap: Still without threshold

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1:08:13hhlightprof DiffuseWeightMap: Still without threshold

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1:08:24Eyeball ProfileRun() for threshold bugs

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1:08:24Eyeball ProfileRun() for threshold bugs

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1:08:24Eyeball ProfileRun() for threshold bugs

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1:09:52Step in to ProfileRun() and inspect W

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1:09:52Step in to ProfileRun() and inspect W

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1:09:52Step in to ProfileRun() and inspect W

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1:10:35Fix the DiffuseWeightMap printout threshold in ProfileRun()

1:11:25hhlightprof DiffuseWeightMap: With threshold, blank columns

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1:11:25hhlightprof DiffuseWeightMap: With threshold, blank columns

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1:11:25hhlightprof DiffuseWeightMap: With threshold, blank columns

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1:13:45Try various thresholds for the DiffuseWeightMap printout

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1:13:45Try various thresholds for the DiffuseWeightMap printout

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1:13:45Try various thresholds for the DiffuseWeightMap printout

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1:14:54Make ProfileRun() print out the DiffuseWeightMap 8×8

1:15:05hhlightprof DiffuseWeightMap: 8×8 shapes, with threshold

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1:15:05hhlightprof DiffuseWeightMap: 8×8 shapes, with threshold

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1:15:05hhlightprof DiffuseWeightMap: 8×8 shapes, with threshold

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1:15:47Make ProfileRun() print out the X, Y and Z directions of a DiffuseWeightMap Element

1:18:15hhlightprof DiffuseWeightMap: Element directions

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1:18:15hhlightprof DiffuseWeightMap: Element directions

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1:18:15hhlightprof DiffuseWeightMap: Element directions

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1:18:42Make ProfileRun() add a dash to its 0 printout

1:18:56hhlightprof DiffuseWeightMap: Element directions, completely symmetric

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1:18:56hhlightprof DiffuseWeightMap: Element directions, completely symmetric

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1:18:56hhlightprof DiffuseWeightMap: Element directions, completely symmetric

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1:22:35Our cosine falloff equation, and its reusable terms

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1:22:35Our cosine falloff equation, and its reusable terms

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1:22:35Our cosine falloff equation, and its reusable terms

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1:31:53Rephrasing the DiffuseWeightMap generation in a seperable way

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1:31:53Rephrasing the DiffuseWeightMap generation in a seperable way

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1:31:53Rephrasing the DiffuseWeightMap generation in a seperable way

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1:40:28Determine to ruminate on the DiffuseWeightMap

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1:40:28Determine to ruminate on the DiffuseWeightMap

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1:40:28Determine to ruminate on the DiffuseWeightMap

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1:40:55Q&A

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1:40:55Q&A

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1:40:55Q&A

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1:41:35mindmark42 Q: Couldn't at least the tetrahedron unit vector function use a lookup table and lerp?

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1:41:35mindmark42 Q: Couldn't at least the tetrahedron unit vector function use a lookup table and lerp?

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1:41:35mindmark42 Q: Couldn't at least the tetrahedron unit vector function use a lookup table and lerp?

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1:42:38mindmark42 Q: Speed up that function, if it gets called a lot

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1:42:38mindmark42 Q: Speed up that function, if it gets called a lot

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1:42:38mindmark42 Q: Speed up that function, if it gets called a lot

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1:43:47Toggle on the diffuse blur in ComputeLightPropagationWork()

1:43:52Our desire to do the cosine falloff seperable, if we can

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1:43:52Our desire to do the cosine falloff seperable, if we can

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1:43:52Our desire to do the cosine falloff seperable, if we can

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1:45:21Wrap it up

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1:45:21Wrap it up

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1:45:21Wrap it up

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