PixelEffect:send() throws error if uniform unused

[SaxonDouglass]

Hello everyone,

I am working on a jam game using Love 0.8.0 and have an issue with PixelEffect. I would really appreciate your help.

I have several shaders that I would like to switch between at run-time, but some of them use uniforms and some of them don't.

If I try to send() the data to a PixelEffect without the uniforms, it throws an error. I can't just declare the uniforms in the shader because they get optimized out.

Is there some way of silencing the error on Love2D's end, or can I trick the GLSL optimiser into leaving the uniforms in?

Thank you,
Saxon

[Xgoff]

Hello everyone,

I am working on a jam game using Love 0.8.0 and have an issue with PixelEffect. I would really appreciate your help.

I have several shaders that I would like to switch between at run-time, but some of them use uniforms and some of them don't.

If I try to send() the data to a PixelEffect without the uniforms, it throws an error. I can't just declare the uniforms in the shader because they get optimized out.

Is there some way of silencing the error on Love2D's end, or can I trick the GLSL optimiser into leaving the uniforms in?

Thank you,
Saxon

you'll probably just have to pcall those send calls

[SaxonDouglass]

Thank you very much Xgoff, I had forgotten about pcall(). That should do the trick.

Regards,
Saxon

[SaxonDouglass]

I have been unable to get pcall() to work. I have tried it two different ways, but it still throws an error and blue screens:

Code: Select all

pcall(pixelEffect.send(pixelEffect, "rubyTextureSize", {200, 100}))

Code: Select all

pcall(pixelEffect:send("rubyTextureSize", {200, 100}))

Is there any other way I could silence or avoid this error?

[kikito]

The syntax is:

Code: Select all

pcall(function, param1, param2, ...)

So in your case:

Code: Select all

pcall(pixelEffect.send, pixelEffect, "rubyTextureSize", {200, 100})

[SaxonDouglass]

Thank you very much kikito, that works.

I'll make sure to double-check the syntax in future.