Handling Multiple Display Aspect Ratios | Handmade Hero Episode Guide

0:10Recap and set the stage for the day

0:35Consult the issues¹

2:11Determine to fix the "Wrong glViewport parameters" issue

3:52Run the game and demo the resizing situation

5:01handmade_opengl.cpp: Make OpenGLDisplayBitmap() and OpenGLRenderCommands() pass the WindowWidth and WindowHeight to glViewport()

6:27Run the game and see how it now looks

9:00Blackboard: Aspect Ratio Resize

11:03Blackboard: No aspect ratio support

12:57Blackboard: Aspect-awareness

16:48Blackboard: Black bar

18:12Blackboard: Our two cases

19:38handmade_render.cpp: Introduce AspectRatioFit()

23:43Blackboard: Calculating aspect ratios

27:16handmade_render.cpp: Make AspectRatioFit() calculate the optimal dimensions based on that fundamental aspect ratio

34:22handmade_opengl.cpp: Make OpenGLRenderCommands() take the DrawRegion and pass it to glViewport()

35:41handmade_math.h: Introduce GetWidth() and GetHeight()

39:20handmade_opengl.cpp: Introduce OpenGLBindFramebuffer()

40:54Run the game and see that it looks the same

41:06win32_handmade.cpp: Make Win32DisplayBufferInWindow() call AspectRatioFit() to set the DrawRegion

42:08Run the game and try out the new resizing

43:24handmade_opengl.cpp: Make OpenGLDisplayBitmap() take the DrawRegion and pass it to OpenGLBindFramebuffer()

45:04Run the game and see that it just works

45:33handmade_opengl.cpp: Make OpenGLDisplayBitmap() clear to the ClearColor and prevent OpenGLRenderCommands() from drawing the outlines

47:53Run the game, see how it all is and close that issue

49:33Determine to fix the "Incorrect Unproject" issue

51:53win32_handmade.cpp: DrawRegion WinMain()

53:17win32_handmade.cpp: Remove the win32_rendering_type enum in favour of a single GlobalSoftwareRendering

54:21Run the game and ensure that toggling the software renderer still works

54:43win32_handmade.cpp: Make WinMain() compute DrawRegion early on and make all the appropriate functions take it

56:52win32_handmade.cpp: Make WinMain() map the mouse position to the DrawRegion

58:56Run the game and see if the mouse cursor is now working okay

1:00:01win32_handmade.cpp: Make WinMain() base the mouse position on the RenderCommands dimensions

1:00:31Run the game and see that the mouse cursor is still failing

1:01:59Debugger: Resize the window, step in to WinMain() and inspect the MouseU and MouseV

1:03:21win32_handmade.cpp: Make WinMain() correctly compute the MouseY

1:03:56Run the game and see that the mouse coordinates are now being passed correctly

1:04:18Q&A

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1:04:18Q&A

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1:04:18Q&A

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1:05:22Close that issue

1:06:39cubercaleb (Before today) I have a 1600x900 monitor and when I change the code to render at that resolution, both the UI picking and the collision detection for the player get all sorts of messed up, but I haven't tested that since you removed the free moving stuff

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1:06:39cubercaleb (Before today) I have a 1600x900 monitor and when I change the code to render at that resolution, both the UI picking and the collision detection for the player get all sorts of messed up, but I haven't tested that since you removed the free moving stuff

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1:06:39cubercaleb (Before today) I have a 1600x900 monitor and when I change the code to render at that resolution, both the UI picking and the collision detection for the player get all sorts of messed up, but I haven't tested that since you removed the free moving stuff

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1:06:57hayai Can you make it so that holding shift while resizing the window makes it just scale at the intended aspect ratio?

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1:06:57hayai Can you make it so that holding shift while resizing the window makes it just scale at the intended aspect ratio?

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1:06:57hayai Can you make it so that holding shift while resizing the window makes it just scale at the intended aspect ratio?

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1:07:52shinny_magikarp Casey, you forgot to change "UseHeight" to "UseWidth" on the second case of the black bar size's definition

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1:07:52shinny_magikarp Casey, you forgot to change "UseHeight" to "UseWidth" on the second case of the black bar size's definition

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1:07:52shinny_magikarp Casey, you forgot to change "UseHeight" to "UseWidth" on the second case of the black bar size's definition

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1:08:09deravadom Two parter, if that's okay: A) I'd like to start working on a homemade 3D game engine of my own. How much of what you have done here transfers over? B) When do you define how long a second is in the game? How does the lighting work in regards to time?

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1:08:09deravadom Two parter, if that's okay: A) I'd like to start working on a homemade 3D game engine of my own. How much of what you have done here transfers over? B) When do you define how long a second is in the game? How does the lighting work in regards to time?

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1:08:09deravadom Two parter, if that's okay: A) I'd like to start working on a homemade 3D game engine of my own. How much of what you have done here transfers over? B) When do you define how long a second is in the game? How does the lighting work in regards to time?

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1:09:08danyguag How would you suggest a younger developer to get into OpenGL and all of its useful extensions?²

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1:09:08danyguag How would you suggest a younger developer to get into OpenGL and all of its useful extensions?²

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1:09:08danyguag How would you suggest a younger developer to get into OpenGL and all of its useful extensions?²

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1:11:08rohit_n Did you ever go through the NSight plugin on stream?

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1:11:08rohit_n Did you ever go through the NSight plugin on stream?

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1:11:08rohit_n Did you ever go through the NSight plugin on stream?

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1:11:29snoringtortoise Off-topic: Which keyboard layout do you use? Have you tried the various layouts? I've read that QWERTY can be a bit less efficient for programming, what do you think?

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1:11:29snoringtortoise Off-topic: Which keyboard layout do you use? Have you tried the various layouts? I've read that QWERTY can be a bit less efficient for programming, what do you think?

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1:11:29snoringtortoise Off-topic: Which keyboard layout do you use? Have you tried the various layouts? I've read that QWERTY can be a bit less efficient for programming, what do you think?

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1:11:57danyguag I have some experience in OpenGL but not with the extensions

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1:11:57danyguag I have some experience in OpenGL but not with the extensions

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1:11:57danyguag I have some experience in OpenGL but not with the extensions

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1:17:07win32_handmade.cpp: Make Win32MainWindowCallback() handle fixed aspect ratio window resizing based on Raymond Chen's advice³

1:23:56Blackboard: Calculating that new window height

1:25:58Run the game and try resizing the window

1:26:31win32_handmade.cpp: Make Win32MainWindowCallback() only do aspect ratio constrained resize if the shift key is held down

1:27:30Run the game and try resizing with the shift key held down

1:29:57Debugger: Break into Win32MainWindowCallback() to determine what the cx and cy are, and investigate what is happening with the flicker

1:35:59Debugger: Run the game and observe our WM_WINDOWPOSCHANGING output

1:37:35win32_handmade.cpp: Make Win32MainWindowCallback() set the NewPos based on which coordinate is closer

1:38:53Run the game and see if that helps

1:40:10win32_handmade.cpp: Make Win32MainWindowCallback() output the aspect ratio

1:40:57Run the game and observe that aspect ratio

1:41:46win32_handmade.cpp: Make Win32MainWindowCallback() adjust the aspect ratio to ignore the window decorations

1:43:16Blackboard: Computing the aspect ratio for the ClientRect

1:46:59Run the game and see what that does

1:48:56Blackboard: Double-check the maths

1:49:16win32_handmade.cpp: Make Win32MainWindowCallback() compute the NewCx and NewCy differently

1:50:41win32_handmade.cpp: Make Win32MainWindowCallback() set GetWindowRect, run the game and see that it works

1:52:03hayai Yes, it helps

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1:52:03hayai Yes, it helps

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1:52:03hayai Yes, it helps

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1:52:14cubercaleb For AdjustWindowRect you should pass WS_OVERLAPPEDWINDOW which is different from WS_OVERLAPPED, although perhaps you meant that?

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1:52:14cubercaleb For AdjustWindowRect you should pass WS_OVERLAPPEDWINDOW which is different from WS_OVERLAPPED, although perhaps you meant that?

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1:52:14cubercaleb For AdjustWindowRect you should pass WS_OVERLAPPEDWINDOW which is different from WS_OVERLAPPED, although perhaps you meant that?

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1:52:43Wrap it up

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1:52:43Wrap it up

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1:52:43Wrap it up

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