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AppGameKit Studio Chat / SetImageMask() not working with SetRenderToImage()

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JohnStabler
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Posted: 11th Jan 2021 15:17
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Hi,

I've tried getting some AppGameKit classic code to run in AppGameKit Studio but get an error when using SetImageMask() on an image I created with SetRenderToImage(). I'm assuming this is due to differences in the underlying engine and what operations are allowed on CPU / GPU.

Is there a workaround? I'm not doing it every frame, so I don't mind if there is a performance hit.

Thanks!
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n00bstar
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Posted: 11th Jan 2021 15:20
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You can try adding:

#renderer "Basic"

at the start of your program. If that fixes the issue, then yes it's a difference between Vulkan and OpenGL. If that doesn't fix it, the problem lies elsewhere.
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JohnStabler
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Posted: 11th Jan 2021 15:30
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Thanks n00bstar.

Yes, that does fix it. So I suppose that makes it a less urgent problem.

However, I'm keen to use the Vulkan engine for performance benefits, so if anybody knows of a method / workaround that works in the Vulkan rendering engine then please let me know.
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JohnStabler
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Posted: 11th Jan 2021 15:33 Edited at: 11th Jan 2021 15:38
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Maybe if I explain what I'm trying to achieve, other options may open.

I'm bashing together some textures with CreateRenderImage() and SetRenderToImage(). The last step involves applying a mask to feather the ages and vary the alpha channel across the image with another texture which is basically cloud noise.

Here's a video of the effect; notice the clouds surrounding the asteroids.

https://youtu.be/7OqKuzCEnf4
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n00bstar
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Posted: 11th Jan 2021 17:15
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I'm not sure if I'm looking at the correct OpenGL version or the incorrect Vulkan version? I mean.. on my end this looks pretty damn good.

Or did you mean "i get an error" as in the program won't compile at all when under Vulkan?
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JohnStabler
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Posted: 11th Jan 2021 17:56
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Sorry, that video is taken when running OpenGL. I was just trying to explain what I was doing so someone might have a workaround.

I have actually created a workaround. Create the image using SetRenderToImage(). Then save the image and use LoadImage() before SetImageMask(). As I said, I do it all during loading time, so it's not a problem. But it wouldn't be a solution if you needed to do some small image manipulations between frames.

The issue I now have is with SetShadowMappingMode(). When using the Vulkan renderer, my skybox isn't getting rendered when shadows are on.
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blink0k
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Posted: 11th Jan 2021 20:04
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As long as it doesn't happen every frame maybe try GetImage() rather than SetRenderToImage()

I think the problem is that Vulcan doesn't render transparency and if the image doesn't have transparency then masking doesn't work...i think
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