Analyzing the Diffuse Blur
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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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0:02Recap 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()
14:31Toggle off the diffuse blur in ComputeLightPropagationWork()
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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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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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
40:27Make ProfileRun() print the DiffuseWeightMap to stdout
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()
48:46Make ProfileRun() print out the DiffuseWeightMap, based on BuildDiffuseLightMaps()
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
52:20Make ProfileRun() print dashes when the Entry is 0
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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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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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
1:00:50Try making ProfileRun() print out the DiffuseWeightMap 16×16, to see the shape when it wraps
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()
1:06:28Accidentally add a threshold of 0.01f to BuildDiffuseLightMaps()
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
1:07:38Add a threshold to the DiffuseWeightMap printout
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()
1:10:35Fix the DiffuseWeightMap printout threshold in ProfileRun()
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
1:14:54Make ProfileRun() print out the DiffuseWeightMap 8×8
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
1:15:47Make ProfileRun() print out the X, Y and Z directions of a DiffuseWeightMap Element
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
1:18:42Make ProfileRun() add a dash to its 0 printout
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()
1:43:47Toggle on the diffuse blur in ComputeLightPropagationWork()
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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