37 lines
3.0 KiB
Plaintext
37 lines
3.0 KiB
Plaintext
[video output=day313 member=cmuratori stream_platform=twitch stream_username=handmade_hero project=code title="Returning to Work on Z Layers" vod_platform=youtube id=PYdOZ_r9RLw annotator=Miblo]
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[0:11][Recap and set the stage for the day]
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[2:08][handmade_world_mode.cpp: Make AddStandardRoom() generate multiple layers, run the game and see how wrong the sorting is]
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[3:24][A few words of encouragement on exploratory programming and embracing the forward flow of the architecture]
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[5:36][handmade_entity.cpp: Make UpdateAndRenderEntities() work as it did before the work on the sorting, run the game and see how it looks]
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[8:37][Blackboard: Z Slices and Two Separate Conceptualisations of What it Means to be Up]
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[11:29][Blackboard: Layered Alpha Blending]
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[17:57][Blackboard: Solving this Problem]
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[19:34][Blackboard: Render Buffers]
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[21:32][Blackboard: Back of the envelope calculation on the potential Graphics Memory available to us]
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[24:13][Blackboard: Back of the envelope calculation on the potential Memory Bandwidth available to us]
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[29:21][Consider how to proceed]
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[30:18][handmade_entity.cpp: Introduce a TestAlpha in UpdateAndRenderEntities()]
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[34:01][Run the game and see what happens]
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[34:46][Debugger: Break into UpdateAndRenderEntities() and inspect the fade values]
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[40:05][handmade_entity.cpp: Tweak the FadeTopEndZ and FadeTopStartZ values in UpdateAndRenderEntities(), and again break into it]
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[42:27][handmade_opengl.cpp: Pass Entry->PremulColor.a to the rectangle drawing glColor4f() call in OpenGLRenderCommands()]
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[43:49]["So I'm going to go work this out on the blackboard and figure out if I'm just... uh... on crack"][quote 523]
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[45:14][handmade_entity.cpp: Subtract WorldMode->CameraOffset.z from the CameraRelativeGroundZ computation in UpdateAndRenderEntities()]
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[45:42][Run the game and see that we're fine again]
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[47:00][Blackboard: What RecanonicalizeCoord is doing]
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[49:31][Blackboard: Offsetting Z]
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[51:01][handmade_world_mode.cpp: Make ChunkPositionFromTilePosition() Offset the entities' Z downwards]
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[53:12][handmade_world_mode.cpp: Make ChunkPositionFromTilePosition() compute TileDepthInMeters differently]
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[54:20][Debugger: Break into ChunkPositionFromTilePosition() and inspect the offset values]
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[57:38][Debugger: Break into ConvertToLayerRelative() and inspect the Z values]
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[59:50][handmade_entity.cpp: Provisionally compute the relative layer we want for the entities]
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[1:02:06][Q&A][:speech]
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[1:03:47][@insobot][Um. Because undefined behavior?]
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[1:04:30][@telepathyy][What keyboard do you have?]
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[1:05:40]["Like putting your finger in a cloud"][quote 506]
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[1:06:00][@bestofluck][Do you expect that the final game will contain enough sprites to warrant using a texture atlas to reduce the number of texture binds per frame?]
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[1:08:33][@khorm][I don't understand why the "base" Z value of each floor would be negative, it seems really contrived. It seems very logical to me to have 0 as as the "bottom". Maybe it has to do with rendering? I have not followed the latest shows]
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[1:09:50][Blackboard: Canonical Point for a Chunk]
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[1:13:22][Wrap it up][:speech]
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[/video]
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