allow passing arguments through drawfunctions

MANUAL.md

@@ -303,6 +303,23 @@ end
 
 **Nested AFs are supported.** As with all complicated things in this template, check out the [`ActorFrame` example](#simple-actorframe-setup) for a simple working setup.
 
+An additional extra feature Uranium Template adds to assist with rendering multiple instances is the ability to pass in arguments through `Draw()`:
+
+```lua
+setDrawFunction(af, function(x, y)
+  quad:xy(x, y)
+  quad:Draw()
+end)
+
+function uranium.update()
+  for x = 0, 3 do
+    for y = 0, 3 do
+      af:Draw(x, y)
+    end
+  end
+end
+```
+
 #### `ActorScroller`
 
 `ActorFrame` already has an extremely, _extremely_ complicated setup powering it in the back-end; and `ActorScroller` is way too niche for me to give it the same treatment. Sorry!
@@ -332,15 +349,13 @@ local sprite = Sprite('docs/uranium.png')
 local shader = Shader('src/shader.frag') -- returns a RageShaderProgram
 ```
 
-Afterwards, call `setShader` on your actor. _Using `:SetShader` will not work._
+Afterwards, call `setShader` on your actor. You can call this outside of `uranium.init`, if you like.
 
 ```lua
-function uranium.init()
-  setShader(actor, shader)
-  -- or
-  setShaderfuck(shader)
-  -- (don't forget to clearShaderfuck())
-end
+setShader(actor, shader)
+-- or
+setShaderfuck(shader)
+-- (don't forget to clearShaderfuck())
 ```
 
 If you prefer, you can also inline shader code, as long as you don't mix files with inlined code in the same shader:
@@ -1339,9 +1354,7 @@ void main() {
 shader:uniform1f('yo', 1)
 shader:uniform1f('scale', 0.25)
 
-function uranium.init()
-  setShader(sprite, shader)
-end
+setShader(sprite, shader)
 
 function uranium.update()
   shader:uniform1f('tx', t)

template

@@ -1 +1 @@
-Subproject commit 70206204960a13bda1d1414fe517b09156344d36
+Subproject commit 99f8ab7f8bae6a95419881bb5dbe105c807ad3ba