Shädows (A light engine)

[Skeletonxf]

When trying to run the demo on my phone I get the following error

Error

Cannot compile pixel shader code:
0:1 S0052: Uniform variable with initializer

Traceback

[C]: in function 'newShader'
shadows/Shaders.lua:41 in main chunk
shadows/init.lua:9 in main chunk
etcetera

Any ideas on fixing it?

Long overdue edit: These sorts of errors are caused by trying to run OpenGL code not written to also run fine in GLES that the mobile love versions use.

[Sungray]

Hi guys,

Is there a way to create a shadow shape which mimics the shape of a sprite, excluding the alpha ? I'm thinking about creating a polygonshape by pointing the outline of my sprite, but it seems complicated.

To be clear, I want the shadow of my character to look like my character.

[Skeletonxf]

I think you would have to create a shape https://github.com/matiasah/shadows/wiki/Shape out of verticies that outline your spite. So you'd first have to find a way to convert your spite into verticies.

If you only need one or two sprites you could probably do it manually but if you're going to have a lot you'd probably need some fancy algorithm to take the image data and output the vertices.

[Sungray]

Yep thats what I expected thanks. I'll work on that.

[KyleFlores1014]

When trying to run the demo on my phone I get the following error

Error

Cannot compile pixel shader code:
0:1 S0052: Uniform variable with initializer

Traceback

[C]: in function 'newShader'
shadows/Shaders.lua:41 in main chunk
shadows/init.lua:9 in main chunk
etcetera

Any ideas on fixing it?

Long overdue edit: These sorts of errors are caused by trying to run OpenGL code not written to also run fine in GLES that the mobile love versions use.

Sorry Im new, How did you fix this?

[Tricky]

Wow.... that is a nice effect you created there....
I am officially surprised as I never imagined with a scripted based programming tool you could do that

[KyleFlores1014]

error.png (145.33 KiB) Viewed 8898 times

this is the error Im getting. Nevermind my other reply.

[zorg]

I believe that's this line:

Code: Select all

vec2 SizeFactor = vec2(Quality / Size);

where Quality is defined to be 1.0, and Size is an extern vec2.

As was said elsewhere, and maybe here as well, Handheld GL ES is stricter than Desktop GL, so things that get accepted on desktops bc of leniency might error on handhelds.

That said, the 1.0 should have been a float, not an int, maybe do

Code: Select all

const float Quality = 1.0

instead of #defining it.

(IANAgraphicsprogrammer so with a hint of salt, please )

[Starkkz]

I updated the shaders on the repository, could you try them and tell me if they work for you?

[KyleFlores1014]

I updated the shaders on the repository, could you try them and tell me if they work for you?

It now works; But I have a slight problem

Screenshot_20180109-195808.png (453.36 KiB) Viewed 8789 times

theres that flat color which isnt on pc. Ive tried using open GLES in pc, it doesnt do it on pc. Only on my phone.