Planning Lighting from Depth Peels — Handmade Hero — Episode Guide

0:07Recap and set the stage for the day

2:24Run the game to show off the renderer and camera movement

5:55Launch the code with a few words on the tweaked 4coder UI, and our intentions for the light textures

9:09Blackboard: Light accumulation pass

13:08Run the game and note that there's no shadowing, with a few words on shadow maps

17:18Blackboard: Using our depth peels as geometry for the bounce lighting

18:59Blackboard: Screen-space ambient occlusion (SSAO)

20:49Blackboard: Voxel cone tracing

23:05Hunt for a paper on ambient occlusion

26:19"I don't want pirate stuff, I want Pirates of the Caribbean"^α

29:52Consult 'Dynamic Ambient Occlusion and Indirect Lighting'¹

35:13Blackboard: Writing out the normal with the depth buffer, filtered down in resolution

39:01Blackboard: The expense of this scheme

43:35Blackboard: Sampling from the textures²

47:48"We are out in complete La La Land, and I admit that, but, I mean, it's lighting, what do you want from me?"^β

47:57Blackboard: Multigrid lighting, modulating incoming values at successively finer resolutions

56:42"That's my stupid idea. I hope you like it"^γ

56:54Blackboard: Possible discontinuities caused by the mipmap boundaries

58:22Consider going for this hierarchically merged lighting idea

1:00:55Blackboard: Lighting memory requirements

1:08:25Blackboard: Hardware capability requirements

1:13:18Consult the OpenGL Hardware Database³ and OpenGL Core Profile 4.4⁴

1:16:09handmade_opengl.h: Add MaxColorAttachments and MaxSamplersPerShader to open_gl, and enable OpenGLInit() to poll for those values⁵

1:20:06Run the game and inspect the MaxColorAttachments and MaxSamplersPerShader values for our card

1:20:44Consult the OpenGL Hardware Database for GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS⁶

1:22:19Go for it, considering first how many mip levels to use

1:30:11handmade_opengl.h: Introduce light_buffer and add an array of them to the open_gl struct

1:36:43handmade_opengl.cpp: Enable OpenGLChangeToSettings() to free and allocate lighting framebuffers

1:39:08handmade_opengl.cpp: Try to make FramebufferTexImage() pass 0 as the Format, Type and Data to glTextImage2D()

1:41:33Run the game and hit a GL_INVALID_ENUM error

1:41:51handmade_opengl.cpp: Enable OpenGLChangeToSettings() to attach our textures to the lighting framebuffer⁷

1:51:58Run the game and see our surfaces ready to go

1:52:44Q&A

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1:52:44Q&A

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1:52:44Q&A

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1:53:28dautor Are you planing on taking a different / non-conventional approach to lighting?

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1:53:28dautor Are you planing on taking a different / non-conventional approach to lighting?

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1:53:28dautor Are you planing on taking a different / non-conventional approach to lighting?

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1:53:43itsaunicorndog Any recommended programs to use for a noob?

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1:53:43itsaunicorndog Any recommended programs to use for a noob?

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1:53:43itsaunicorndog Any recommended programs to use for a noob?

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1:54:18x13pixels Is that metal music coming from the stream or am I trippin'?

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1:54:18x13pixels Is that metal music coming from the stream or am I trippin'?

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1:54:18x13pixels Is that metal music coming from the stream or am I trippin'?

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1:54:38dautor Will you port the game to JAI? Or make a part of it in JAI once it comes out, and just link to the original?

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1:54:38dautor Will you port the game to JAI? Or make a part of it in JAI once it comes out, and just link to the original?

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1:54:38dautor Will you port the game to JAI? Or make a part of it in JAI once it comes out, and just link to the original?

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1:55:37willsch Which do you think will take longer, coding the engine or coding the actual game?

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1:55:37willsch Which do you think will take longer, coding the engine or coding the actual game?

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1:55:37willsch Which do you think will take longer, coding the engine or coding the actual game?

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1:57:59itsaunicorndog Editor for programming

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1:57:59itsaunicorndog Editor for programming

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1:57:59itsaunicorndog Editor for programming

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1:59:07hholst80 Do you work on Handmade Hero outside of the streaming time? How representative is the time on stream to the total time you put down on the programming / architecture?

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1:59:07hholst80 Do you work on Handmade Hero outside of the streaming time? How representative is the time on stream to the total time you put down on the programming / architecture?

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1:59:07hholst80 Do you work on Handmade Hero outside of the streaming time? How representative is the time on stream to the total time you put down on the programming / architecture?

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2:01:16garryjohanson Off-topic and not really a question: There exists an IDE in Linux called "code::blox". It works great but I don't know if it has feature parity with vs. But something to look into, perhaps

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2:01:16garryjohanson Off-topic and not really a question: There exists an IDE in Linux called "code::blox". It works great but I don't know if it has feature parity with vs. But something to look into, perhaps

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2:01:16garryjohanson Off-topic and not really a question: There exists an IDE in Linux called "code::blox". It works great but I don't know if it has feature parity with vs. But something to look into, perhaps

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2:02:08macielda About Retained and Immediate mode, do you think these paradigm boxes work for game code (as opposed to engine code) as well?

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2:02:08macielda About Retained and Immediate mode, do you think these paradigm boxes work for game code (as opposed to engine code) as well?

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2:02:08macielda About Retained and Immediate mode, do you think these paradigm boxes work for game code (as opposed to engine code) as well?

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2:04:15Retention

2:08:28macielda If so, would you write your game logic code in Immediate mode or Retained mode?

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2:08:28macielda If so, would you write your game logic code in Immediate mode or Retained mode?

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2:08:28macielda If so, would you write your game logic code in Immediate mode or Retained mode?

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2:10:25dautor I plan on starting a project this summer, a 4D perspective projection voxel game. May I ask you for some tips on graphics, then? (Like, how do I utilize the graphics card the best, because it is not optimized for 5x5 matrices and it's hard to think with other concepts for me?)

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2:10:25dautor I plan on starting a project this summer, a 4D perspective projection voxel game. May I ask you for some tips on graphics, then? (Like, how do I utilize the graphics card the best, because it is not optimized for 5x5 matrices and it's hard to think with other concepts for me?)

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2:10:25dautor I plan on starting a project this summer, a 4D perspective projection voxel game. May I ask you for some tips on graphics, then? (Like, how do I utilize the graphics card the best, because it is not optimized for 5x5 matrices and it's hard to think with other concepts for me?)

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2:11:02Blackboard: GPUs aren't actually [XYZW] vectors

2:16:19Wind it down

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2:16:19Wind it down

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2:16:19Wind it down

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