Enabling OpenGL Multisampling
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Quote 552
The only reason that we ever did it is because Won insisted that we do it.
—molly_rocket, 19th February, 2017
[α]2:20:17
References ▼
Khronos
glSampleCoverage
[1]1:05:29
docs.GL
glTexImage2DMultisample
[2]1:11:57
Khronos
glcorearb.h
[3]1:34:07
Khronos Wiki
Multisampling
[4]1:42:20
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Casey Muratori
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Matt Mascarenhas
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0:03Recap and set the stage for the day
0:03Recap and set the stage for the day
0:03Recap and set the stage for the day
2:24Run the game to demo the Z-fighting and fringing that we need to eliminate
2:24Run the game to demo the Z-fighting and fringing that we need to eliminate
2:24Run the game to demo the Z-fighting and fringing that we need to eliminate
4:51Consider switching to a different computer with a newer graphics card
4:51Consider switching to a different computer with a newer graphics card
4:51Consider switching to a different computer with a newer graphics card
6:50Determine to enable multisampled antialiasing
6:50Determine to enable multisampled antialiasing
6:50Determine to enable multisampled antialiasing
7:54handmade_opengl.cpp: Disable the cube texturing and colour the sides of the cubes in a gradient
7:54handmade_opengl.cpp: Disable the cube texturing and colour the sides of the cubes in a gradient
7:54handmade_opengl.cpp: Disable the cube texturing and colour the sides of the cubes in a gradient
12:47Run the game to see our visually parsable cubes
12:47Run the game to see our visually parsable cubes
12:47Run the game to see our visually parsable cubes
19:04Run the game to see our green cubes
19:04Run the game to see our green cubes
19:04Run the game to see our green cubes
19:18Blackboard: Fake Cube Lighting
19:18Blackboard: Fake Cube Lighting
19:18Blackboard: Fake Cube Lighting
25:53Run the game to illustrate areas requiring better lighting
25:53Run the game to illustrate areas requiring better lighting
25:53Run the game to illustrate areas requiring better lighting
28:53Blackboard: MSAA (Multisample Antialiasing) + ATC (Alpha to Coverage)
28:53Blackboard: MSAA (Multisample Antialiasing) + ATC (Alpha to Coverage)
28:53Blackboard: MSAA (Multisample Antialiasing) + ATC (Alpha to Coverage)
30:04Blackboard: Aliasing and Apparent Error in Discretizing
30:04Blackboard: Aliasing and Apparent Error in Discretizing
30:04Blackboard: Aliasing and Apparent Error in Discretizing
34:25Blackboard: Our current implementation of antialiasing
34:25Blackboard: Our current implementation of antialiasing
34:25Blackboard: Our current implementation of antialiasing
37:30Blackboard: Multisample antialiasing on graphics cards
37:30Blackboard: Multisample antialiasing on graphics cards
37:30Blackboard: Multisample antialiasing on graphics cards
44:09Blackboard: Typical MSAA pipeline in GPU APIs
44:09Blackboard: Typical MSAA pipeline in GPU APIs
44:09Blackboard: Typical MSAA pipeline in GPU APIs
49:02Blackboard: Alpha to Coverage
49:02Blackboard: Alpha to Coverage
49:02Blackboard: Alpha to Coverage
50:43Blackboard: Where are the samples?
50:43Blackboard: Where are the samples?
50:43Blackboard: Where are the samples?
55:55Blackboard: Alpha to Coverage continued
55:55Blackboard: Alpha to Coverage continued
55:55Blackboard: Alpha to Coverage continued
57:20Research OpenGL's specification alpha to coverage
57:20Research OpenGL's specification alpha to coverage
57:20Research OpenGL's specification alpha to coverage
1:05:29Research glSampleCoverage1
1:05:29Research glSampleCoverage1
1:05:29Research glSampleCoverage1
1:08:16handmade_opengl.cpp: Make OpenGLRenderCommands() enable GL_SAMPLE_ALPHA_TO_COVERAGE, GL_SAMPLE_ALPHA_TO_ONE and GL_MULTISAMPLE
1:08:16handmade_opengl.cpp: Make OpenGLRenderCommands() enable GL_SAMPLE_ALPHA_TO_COVERAGE, GL_SAMPLE_ALPHA_TO_ONE and GL_MULTISAMPLE
1:08:16handmade_opengl.cpp: Make OpenGLRenderCommands() enable GL_SAMPLE_ALPHA_TO_COVERAGE, GL_SAMPLE_ALPHA_TO_ONE and GL_MULTISAMPLE
1:10:32Blackboard: Screen Door Transparency
1:10:32Blackboard: Screen Door Transparency
1:10:32Blackboard: Screen Door Transparency
1:11:57Research how to set up a buffer suitable for multisampling2
1:11:57Research how to set up a buffer suitable for multisampling2
1:11:57Research how to set up a buffer suitable for multisampling2
1:23:37A few words on GPU programming
1:23:37A few words on GPU programming
1:23:37A few words on GPU programming
1:26:41handmade_opengl.cpp: Make OpenGLRenderCommands() call glTexImage2DMultisample()
1:26:41handmade_opengl.cpp: Make OpenGLRenderCommands() call glTexImage2DMultisample()
1:26:41handmade_opengl.cpp: Make OpenGLRenderCommands() call glTexImage2DMultisample()
1:34:07handmade_opengl.cpp: Set up for multisampling, based on glcorearb.h3
1:34:07handmade_opengl.cpp: Set up for multisampling, based on glcorearb.h3
1:34:07handmade_opengl.cpp: Set up for multisampling, based on glcorearb.h3
1:42:20Step in to OpenGLRenderCommands() to find that our graphics card may not support multisampling4
1:42:20Step in to OpenGLRenderCommands() to find that our graphics card may not support multisampling4
1:42:20Step in to OpenGLRenderCommands() to find that our graphics card may not support multisampling4
1:50:46handmade_opengl.cpp: Make OpenGLRenderCommands() pass MaxSampleCount - 1 to glTexImage2DMultisample(), and step in to find that we have 8x multisampling, but that it is not working properly
1:50:46handmade_opengl.cpp: Make OpenGLRenderCommands() pass MaxSampleCount - 1 to glTexImage2DMultisample(), and step in to find that we have 8x multisampling, but that it is not working properly
1:50:46handmade_opengl.cpp: Make OpenGLRenderCommands() pass MaxSampleCount - 1 to glTexImage2DMultisample(), and step in to find that we have 8x multisampling, but that it is not working properly
2:01:34handmade_opengl.cpp: Try passing MaxSampleCount to glTexImage2DMultisample(), and run the game to find that it works
2:01:34handmade_opengl.cpp: Try passing MaxSampleCount to glTexImage2DMultisample(), and run the game to find that it works
2:01:34handmade_opengl.cpp: Try passing MaxSampleCount to glTexImage2DMultisample(), and run the game to find that it works
2:02:30Q&A
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2:02:30Q&A
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2:02:30Q&A
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2:03:27sahfortv Can you check if the status has changed after updating bind texture?
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2:03:27sahfortv Can you check if the status has changed after updating bind texture?
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2:03:27sahfortv Can you check if the status has changed after updating bind texture?
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2:03:53randdalf Did you remember to prefix your glTexImageMultisample2D with a WINAPI) (aka __stdcall prefix)? That's usually the cause of access violations for me
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2:03:53randdalf Did you remember to prefix your glTexImageMultisample2D with a WINAPI) (aka __stdcall prefix)? That's usually the cause of access violations for me
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2:03:53randdalf Did you remember to prefix your glTexImageMultisample2D with a WINAPI) (aka __stdcall prefix)? That's usually the cause of access violations for me
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2:05:20win32_handmade.cpp: Make Win32InitOpenGL call glTexImage2DMultisample()
2:05:20win32_handmade.cpp: Make Win32InitOpenGL call glTexImage2DMultisample()
2:05:20win32_handmade.cpp: Make Win32InitOpenGL call glTexImage2DMultisample()
2:06:37macielda Your glTexParameteri needs to use GL_TEXTURE_2D_MULTISAMPLE instead of GL_TEXTURE_2D
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2:06:37macielda Your glTexParameteri needs to use GL_TEXTURE_2D_MULTISAMPLE instead of GL_TEXTURE_2D
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2:06:37macielda Your glTexParameteri needs to use GL_TEXTURE_2D_MULTISAMPLE instead of GL_TEXTURE_2D
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2:08:36general1337 Is there a way to debug or have a visual example of the multisampling process?
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2:08:36general1337 Is there a way to debug or have a visual example of the multisampling process?
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2:08:36general1337 Is there a way to debug or have a visual example of the multisampling process?
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2:09:03mathk_ Maybe we should use glDebugMessageCallback and glEnable(GL_DEBUG_SYNCHRONOUS) sometime, then we can assert in the callback and are able to see just where we gl error in the debugger
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2:09:03mathk_ Maybe we should use glDebugMessageCallback and glEnable(GL_DEBUG_SYNCHRONOUS) sometime, then we can assert in the callback and are able to see just where we gl error in the debugger
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2:09:03mathk_ Maybe we should use glDebugMessageCallback and glEnable(GL_DEBUG_SYNCHRONOUS) sometime, then we can assert in the callback and are able to see just where we gl error in the debugger
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2:10:07snoringtortoise You mentioned in a previous episode that one of the reasons for moving to 3D was due to performance concerns with the sorting. Would it have been a viable alternative to keep the sorting results in permanent storage and then each frame only re-sort the entities that have moved? Just considering that many entities like trees and traversables don't move
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2:10:07snoringtortoise You mentioned in a previous episode that one of the reasons for moving to 3D was due to performance concerns with the sorting. Would it have been a viable alternative to keep the sorting results in permanent storage and then each frame only re-sort the entities that have moved? Just considering that many entities like trees and traversables don't move
🗪
2:10:07snoringtortoise You mentioned in a previous episode that one of the reasons for moving to 3D was due to performance concerns with the sorting. Would it have been a viable alternative to keep the sorting results in permanent storage and then each frame only re-sort the entities that have moved? Just considering that many entities like trees and traversables don't move
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2:12:29macielda Casey, I have started working on Handmade Vulkan port earlier today, is that okay? I got it to initialize properly and have done some groundwork for outputting rects. My current plan is to work on it this week
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2:12:29macielda Casey, I have started working on Handmade Vulkan port earlier today, is that okay? I got it to initialize properly and have done some groundwork for outputting rects. My current plan is to work on it this week
🗪
2:12:29macielda Casey, I have started working on Handmade Vulkan port earlier today, is that okay? I got it to initialize properly and have done some groundwork for outputting rects. My current plan is to work on it this week
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2:15:33macielda So Alpha to Coverage does order-independent transparency just like that? Any serious limitations you can think of?
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2:15:33macielda So Alpha to Coverage does order-independent transparency just like that? Any serious limitations you can think of?
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2:15:33macielda So Alpha to Coverage does order-independent transparency just like that? Any serious limitations you can think of?
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2:17:50snoringtortoise For those of us who are very interested in engine development, what are some of the more advanced platform features that you would recommend investigating?
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2:17:50snoringtortoise For those of us who are very interested in engine development, what are some of the more advanced platform features that you would recommend investigating?
🗪
2:17:50snoringtortoise For those of us who are very interested in engine development, what are some of the more advanced platform features that you would recommend investigating?
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2:20:17"The only reason that we ever did it is because Won insisted that we do it"α
2:20:17"The only reason that we ever did it is because Won insisted that we do it"α
2:20:17"The only reason that we ever did it is because Won insisted that we do it"α
2:21:26snoringtortoise On the platform side like any debugging features, you mentioned a while ago that 1935's engine was light years ahead in that it is far more advanced
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2:21:26snoringtortoise On the platform side like any debugging features, you mentioned a while ago that 1935's engine was light years ahead in that it is far more advanced
🗪
2:21:26snoringtortoise On the platform side like any debugging features, you mentioned a while ago that 1935's engine was light years ahead in that it is far more advanced
🗪
2:24:51thesizik "Problem exists between Khronos and Casey"?
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2:24:51thesizik "Problem exists between Khronos and Casey"?
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2:24:51thesizik "Problem exists between Khronos and Casey"?
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2:25:19Close everything down with a glimpse into the future
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2:25:19Close everything down with a glimpse into the future
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2:25:19Close everything down with a glimpse into the future
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