[util] shadertoy shader effect viewer

[pgimeno]

This was very broken when I tried it. I'm pretty sure a lot has changed since this version of love so now this code looks pretty bad.
I updated it to 11.3 and made it work with pre-converted glsl code.

I missed this project, awesome, thanks for updating it!

I get X mirrored. Any idea if that's fixable?

[Andlac028]

You can increase performance by remove love.graphics.draw call in love.update because it has no effect and you are already calling it in love.draw (in my case, it doubles FPS)

[pgimeno]

I get X mirrored. Any idea if that's fixable?

Well, I've fixed it with this:

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diff -ru a/main.lua b/main.lua
--- a/main.lua	2020-06-09 00:48:08.000000000 +0200
+++ b/main.lua	2020-06-11 02:29:18.696073441 +0200
@@ -123,7 +123,7 @@
   end
   if iSystem.iMouse then
     iSystem.iMouse[1],iSystem.iMouse[2] = love.mouse.getPosition()
-	iSystem.iMouse[1],iSystem.iMouse[2] = resolution[1]-iSystem.iMouse[1],resolution[2]-iSystem.iMouse[2]
+    iSystem.iMouse[1],iSystem.iMouse[2] = iSystem.iMouse[1],resolution[2]-iSystem.iMouse[2]
     if love.mouse.isDown(1) then
         if iSystem.iMouse[3]<0 then
           iSystem.iMouse[3],iSystem.iMouse[4] = love.mouse.getPosition()
@@ -139,5 +139,5 @@
 end
 
 function love.draw()
- love.graphics.draw(canvas,0,0,math.pi,1,1,resolution[1],resolution[2])
+  love.graphics.draw(canvas,0,0,0,1,-1,0,resolution[2])
 end

Also, I concur with Andlac028; I also get a 2x speedup when removing the love.graphics.draw line from love.update.

[Andlac028]

It happens only to me, that Löve simply crashes on love.graphics.newShader function runned in pcall with no message on shader "circle inversion laser.glsl"? (using LÖVE 11.3 on Windows 8.1, I can boot Ubuntu and try it on it too)

Update:
When I removed line 4:

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#define frame(u) camLens*(u-.5*iResolution.xy)/iResolution.y

Löve doesn't crash, only love.graphics.newShader returns error:

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Error: Error validating pixel shader code:
Line 121: ERROR: 'frame' : no matching overloaded function found 
Line 121: ERROR: '=' :  cannot convert from ' const float' to ' temp 2-component vector of float'
Line 121: ERROR: '' : compilation terminated 
ERROR: 3 compilation errors.  No code generated.

[DoctorEnder]

I'm glad I restarted the hype. I added more features and fixed a major bug. The shader was being rendered twice.
Made some other nice changes and things, didn't make a list

Now you can do more things
p = pause
v = toggle on/off vsync
f = toggle fullscreen
r = restart
1,2,3,... = switch monitors

shadertoy better.love

(1.84 MiB) Downloaded 375 times

I hope I didn't miss anything important this time