How to disable antialiasing in rendered image? #640
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I've been trying to completely disable antialiasing in pygfx, without much success. The problem is illustrated by running the wgpu-py and the pygfx hello-triangle examples, producing different behaviour: wgpu-py: I would like to reproduce the wgpu-py behaviour by modifying the pygfx example, could anyone help me on how to achieve that? |
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Replies: 2 comments 1 reply
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I think Context: Pygfx renderes to an offscreen texture that (if you have a non-hidpi screen) is twice as large. When rendering that (larger) texture to screen, the data is smoothed. This is known as FSAA (full-screen antialiasing). |
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Oh, I just realized that even with it set to 1, it will perform a wee bit of smoothing, so it will produce a different result. As it happens, I have an open PR #638 that will allow turning off all smoothing in the final step. |
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Thanks a lot for the very quick answer! Using your proposed change reproduces the behaviour I was after! FYI, documenting this option to turn off filtering once the PR is approved would be great. It is useful if you use the package for scientific computing where you want to do further computation with the rasterized image's pixel values. |
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Oh, I just realized that even with it set to 1, it will perform a wee bit of smoothing, so it will produce a different result. As it happens, I have an open PR #638 that will allow turning off all smoothing in the final step.