38 lines
3.0 KiB
Plaintext
38 lines
3.0 KiB
Plaintext
[video output=day238 member=cmuratori stream_platform=twitch stream_username=handmade_hero project=code title="Making OpenGL Use Our Screen Coordinates" vod_platform=youtube id=kBuaCqaCYwE annotator=Miblo]
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[0:09][Recap and set the stage for the day]
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[2:14][Recall how our graphics architecture works at the moment]
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[6:44][Run the game and refresh our memory about where we left off]
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[9:05][handmade_render_group.cpp: Look at how the renderer currently works and talk about the notion of separating out the renderer]
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[13:28][Create handmade_opengl.cpp and translate RenderGroupToOutput into it]
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[19:58][handmade_opengl.cpp: Introduce OpenGLRectangle]
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[25:47][Blackboard: Maths][quote 355]
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[26:21][Blackboard: Projecting the P from clip space to screen space]
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[32:27]["Life is hard"][quote 356]
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[32:46][Blackboard: Setting up our transformation matrix]
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[41:09][win32_handmade.cpp: Write our new OpenGLRectangle function inline, passing it the old values at first]
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[43:14][Run the game and see our old bug]
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[44:09][Internet: glLoadMatrix[ref
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site="Rutgers"
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page="glLoadMatrix"
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url="http://www.cs.rutgers.edu/~decarlo/428/gl_man/loadmatrix.html"]]
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[45:29][win32_handmade.cpp: Initialize Proj array to pass to glLoadMatrix]
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[47:25][win32_handmade.cpp: #include handmade_intrinsics.h and handmade_math.h]
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[47:54][Run the game and see that everything does not just work]
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[48:13][Blackboard: Mathematical vs Computational matrix multiplication]
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[53:26][win32_handmade.cpp: Re-encode the Proj array for OpenGL's benefit]
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[56:17][Q&A][:speech]
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[57:04][@Insobot][I'm gonna start? Yeah i installed a driver software company. Kapp?]
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[57:16][@Boorocks998][What keyboard layout do you use?]
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[57:27][@cubercaleb][Will handmade_opengl.cpp be included in the platform layer or game layer?]
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[59:09][@elxenoaizd][Jumped in a bit late, so are we using the fixed-function OpenGL API right now, or will we write our own matrix struct at some point?]
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[59:52][@ozmethod][Wrist braces - recommended for programmers in general, or just something you've had issues with?]
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[1:00:07][@cubercaleb][If you include handmade_opengl.cpp in the game layer, won't that force you to include windows.h and all the OpenGL headers in the game layer?]
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[1:01:41][@grizzlyninja_][Was push buffer rendering primarily in the software renderer because the real hardware renderer works that way due to GPUs?]
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[1:02:16][@Pix1234][Will the game be given away to dev viewers for free?]
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[1:02:41][@elxenoaizd][Off-topic: Have you worked with, talked to or met Andre Lamothe before?]
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[1:03:06][@LOstTGM][I feel uncomfortable with floating points representing pixels. Have you ever had problems with OpenGL and floating point values, like passing them to shaders, or texture coordinates?]
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[1:05:25][@AdiAdiABXze][Do you use any EBO (element buffer object) or VBO (vertex buffer object) in your OpenGL code? If no, why?]
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[1:08:35][@LOstTGM][Did you do your own glOrtho call when you set up the projection matrix? Also, thanks for all the matrix explanations]
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[1:11:56][Stream has ended][:speech]
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[/video]
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