Create maps in LÖVE for Android

[ATS]

I looked at the App that 'Gunroar:Cannon()" mentioned and MY GOD ! What a complete App, I believe my problem is solved, thanks to everyone who took the time to help me... you guys are awesome

[pgimeno]

But non of the shader libraries can be used...I think. I can't even do simple effects in my attempts

Any example?

Most importantly, GLES shaders don't accept integers where floats are expected. That's to say, use e.g. 1.0 instead of 1 if a float is required.

[darkfrei]

Most importantly, GLES shaders don't accept integers where floats are expected. That's to say, use e.g. 1.0 instead of 1 if a float is required.

And
y = math.floor(x)/1
?
I knew that Lua has difference between 1 and 1.0!

[pgimeno]

And
y = math.floor(x)/1
?
I knew that Lua has difference between 1 and 1.0!

In Lua 5.1 and LuaJIT there's no difference: they are just double precision floating point numbers. I was talking about GLSL, the language used to write shaders.

Code: Select all

-- Example: Shader to ignore alpha
local shader = love.graphics.newShader[[
  vec4 effect(vec4 colour, Image tex, vec2 texpos, vec2 scrpos)
  {
    return vec4(Texel(tex, texpos).rgb * colour.rgb, 1); // won't work on most GLES
    return vec4(Texel(tex, texpos).rgb * colour.rgb, 1.0); // should work everywhere
  }
]]

(fixed, thanks grump)

[grump]

Code: Select all

-- Example: Shader to ignore alpha
local shader = love.graphics.newShader[[
  vec4 effect(vec2 colour, Image tex, vec2 texpos, vec2 scrpos)
  {
    return vec4(Texel(tex, texpos).rgb * colour.rgb, 1); // won't work on most GLES
    return vec4(Texel(tex, texpos).rgb * colour.rgb, 1.0); // should work everywhere
  }
]]

<pedantic>Won't work anywhere either way because colour should be vec4.</pedantic>

[Gunroar:Cannon()]

Any example?

Most importantly, GLES shaders don't accept integers where floats are expected. That's to say, use e.g. 1.0 instead of 1 if a float is required.

I knew the 1 -> 1.0 thing, I triedto fix what I could . Lighting libs like lightworld don't work. I got shadöw to work barely tho. And in general I can't really find any resource/tutorial to understand shaders well enough to know what I could use them for

[GVovkiv]

general I can't really find any resource/tutorial to understand shaders well enough to know what I could use them for

bruh
1st page of google
https://glslsandbox.com/

[Gunroar:Cannon()]

That just kinda confuses me, I was talking about tutorials and how/when to use them. I read stuff in tuts-gamedev-something but it just gave really basic stuff that löve already does like drawing pictures. Plus I think uniform(or something like that) doesn't work so pushing variables to shaders on android can't work

[pgimeno]

@grump thanks, fixed.

@Gunroar:Cannon() I learnt the basics of shaders with http://blogs.love2d.org/content/beginners-guide-shaders

[GVovkiv]

how/when to use them

Maybe when you need it?
Like, from that site you can see that, with shaders you practically draw anything, with 1 drawback, that shaders like use ALOT of perfomance
So if you need to achieve some effect and you can't do that without shader, then use shader
If you can achieve that without shader and it will take less perfomance, than don't use it

Plus I think uniform(or something like that) doesn't work so pushing variables to

Uh
Then adapt code of pure GLSL to love's

pushing variables to shaders on android can't work

Why?
https://www.love2d.org/wiki/Shader:send