Smoother Blending of Lighting Samples — Handmade Hero — Episode Guide

0:08Recap and set the stage for the day, proceeding with lighting

1:00Run the game to see our current lighting solution

4:48Milton feature request: Hide title bar

5:39Blackboard: Light Interpolation

11:50Blackboard: Weighted sampling of multiple lighting samples per voxel

16:35Run the game to see the lighting discontinuities

17:05handmade_opengl.cpp: Make SumVoxelLight() in CompileZBiasProgram() map the lighting sampling to the radial dimensions of the voxels

18:33Run the game to see the circular blending

19:15handmade_opengl.cpp: Make SumVoxelLight() in CompileZBiasProgram() constrain the lighting sampling to each voxel

24:49Run the game to see the constrained and sparse circular lighting

26:22handmade_opengl.cpp: Reduce the size of the voxels

27:08Run the game to see the denser lighting

30:38handmade_opengl.cpp: Try to set the surface reflectance directly to the lighting colour

31:08Run the game to see that we are not storing the lighting premultiplied

33:31handmade_opengl.cpp: Increase the size of the voxels

34:23Run the game to visualise the lighting sampling, and consider how to improve the voxel lookup scheme

40:09handmade_opengl.cpp: Make CompileZBiasProgram() only sum eight voxels

41:57Blackboard: Interpolating lighting between fewer voxels

43:38handmade_opengl.cpp: Make CompileZBiasProgram() sample from the centre of voxels

45:22Run the game to see the incorrect sampling

46:14Blackboard: Sampling from the centre of voxels

47:20handmade_opengl.cpp: Correctly make CompileZBiasProgram() offset the lighting sampling to the voxel centres

47:53Run the game to see the incomplete sampling

48:23handmade_opengl.cpp: Enable SumVoxelLight() in CompileZBiasProgram() to normalise the lighting samples in each voxel, and then interpolate between the voxels

56:27Run the game to see the square, yet incorrect blending

57:43handmade_opengl.cpp: Correctly compute VoxF

59:27Run the game to see the stable, bilinearly filtered lighting

1:01:22handmade_opengl.cpp: Make SumVoxelLight() modulate the voxel's lighting by a contribution value

1:03:21Run the game to see the modulated lighting

1:03:51handmade_platform.h: Reduce the size of the voxels

1:04:20Run the game to see the light blending

1:04:45handmade_opengl.cpp: Play with the contribution computation

1:06:23Run the game and consider adding directional information to the voxels

1:09:56handmade_platform.h: Consider the possibility of shrinking the lighting data

1:12:18handmade_platform.h: Add D (direction) to the lighting_textures struct

1:14:32handmade_opengl.cpp: Introduce a DSampler

1:23:12Run the game to see that everything is black

1:23:31handmade_render_group.cpp: Determine to enable the lighting scheme to use the lighting directions

1:27:38handmade_render_group.cpp: Read LightingTest() and determine that it is incorrect

1:34:44handmade_render_group.cpp: Reorganise LightingTest()

1:42:56Run the game to see our lighting looking roughly the same

1:43:49handmade_render_group.cpp: Add IncidentLight and AverageDirectionToLight to the lighting_element

1:47:18Close the stream as normal

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1:47:18Close the stream as normal

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1:47:18Close the stream as normal

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