BuddhaShader, branch v0.0.3-adaptive-iterationsFirst steps with OpenGL: A compute shader that renders a BuddhaBrot to an SSBO. Can also save the result to PNG for future viewing pleasure. https://git.grois.info/BuddhaShader/atom/?h=v0.0.3-adaptive-iterations2018-03-17T19:52:50ZRemove layout specifier from struct. Seems it's not allowed after all.2018-03-17T19:52:50ZAndreas Groisandi@grois.info2018-03-17T19:52:50Zurn:sha1:c2018354129a4a6eff1649eaba4d99756b537ed3Properly calculate required buffer size. I'm starting to think that std140 would have been the better alternative...2018-03-17T19:50:04ZAndreas Groisandi@grois.info2018-03-17T19:50:04Zurn:sha1:605c5052dd91ec99901b6254eee2914a394843d3Fix memory allocation for state buffer. How could that ever work?2018-03-17T18:35:55ZAndreas Groisandi@grois.info2018-03-17T18:35:55Zurn:sha1:873409ffdc8f172fb9fe6c46b6ddbad9239cf02dSeems vec2 needs 16 bytes on nVidia...2018-03-17T17:16:30ZAndreas Groisandi@grois.info2018-03-17T17:16:30Zurn:sha1:e1e7d9fed39cb8fc281925960c71f7dc197e6568Correct line endings.2018-03-17T16:51:19ZAndreas Groisandi@grois.info2018-03-17T16:51:19Zurn:sha1:b05e87dc5004f5badc02508570ddc55f31b451ccAgain, cleaned code a bit2018-03-17T16:48:12ZAndreas Groisandi@grois.info2018-03-17T16:48:12Zurn:sha1:5a9c8599daee7d1d569ade3647d0078e56123c7aClean code a bit2018-03-17T16:47:42ZAndreas Groisandi@grois.info2018-03-17T16:47:42Zurn:sha1:e26b273f2c772ab19daade19dfb3163842200c6dWorkers now directly operate on their state buffer.2018-03-17T16:28:40ZAndreas Groisandi@grois.info2018-03-17T16:28:40Zurn:sha1:3ff4226638aceaf179ce27ea9d0fd63327caa53b
To quote the documentation:
First, within a single shader invocation, if you perform an incoherent memory write, the value written will always be visible for reading. But only through that particular variable and only within the shader invocation that issued
the write. You need not do anything special to make this happen.
This means there is nothing stopping us from just reading and writing in the buffer as if the values were local variables, as they are specific to a given invocation. Also, buffer access happens infrequently, and furthermore
there's nothing stopping the GPU from caching the values, as memory access is incoherent anyhow.
Long story short: Now the code uses only 28 VGPRs, meaning that the AMD GCN hardware ideal of 32 is again achieved.
Change PID controller to use frame numbers as time, and time only as controlled parameter2018-03-17T16:09:35ZAndreas Groisandi@grois.info2018-03-17T16:09:35Zurn:sha1:e8848a763daf8f266834fab448fd88715d9d5b18Fix y-value being always the same if only one worker is used2018-03-17T16:00:53ZAndreas Groisandi@grois.info2018-03-17T16:00:53Zurn:sha1:c93afe46650cca3d133dfb49642db2fac2edee0d