Add []= shorthand for setParameter

examples/shader.nim

@@ -1,5 +1,5 @@
 import httpclient, math
-import csfml
+import csfml, csfml_ext
 
 
 type Scene = enum
@@ -15,7 +15,7 @@ proc cycle[T](x: var T) =
 let texture = newTexture("resources/background.jpg")
 var sprite = newSprite(texture)
 var pxShader = newShader(nil, fragmentShaderFilename="resources/pixelate.frag")
-pxShader.setParameter "texture", CurrentTexture
+pxShader["texture"] = CurrentTexture
 
 
 let ipsum = getContent("http://loripsum.net/api/12/short/plaintext")
@@ -33,8 +33,7 @@ window.verticalSyncEnabled = true
 
 var clock = newClock()
 while window.open:
-    var event: Event
-    while window.pollEvent(event):
+    for event in window.events:
         if event.kind == EventType.Closed:
             window.close()
         elif event.kind in {EventType.MouseButtonPressed, EventType.KeyPressed}:
@@ -47,14 +46,14 @@ while window.open:
 
     case scene
       of scPixelate:
-        pxShader.setParameter "pixel_threshold", (x+y)/30
+        pxShader["pixel_threshold"] = (x+y)/30
 
         window.draw sprite, renderStates(shader=pxShader)
 
       of scWaveBlur:
-        wbShader.setParameter "wave_phase", time
-        wbShader.setParameter "wave_amplitude", x*40, y*40
-        wbShader.setParameter "blur_radius", (x+y)*0.008
+        wbShader["wave_phase"] = time
+        wbShader["wave_amplitude"] = (x*40, y*40)
+        wbShader["blur_radius"] = (x+y)*0.008
 
         window.clear White
         window.draw text, renderStates(shader=wbShader)

src/csfml_ext.nim

@@ -33,6 +33,28 @@ iterator events*[T: Window|RenderWindow] (window: T): Event =
     yield event
 
 
+proc `[]=`*[T: cfloat|float](shader: Shader, name: string, x: T) =
+    shader.setParameter(name, cfloat(x))
+proc `[]=`*[T: cfloat|float](shader: Shader, name: string, p: tuple[x, y: T]) =
+    shader.setParameter(name, cfloat(p.x), cfloat(p.y))
+proc `[]=`*[T: cfloat|float](shader: Shader, name: string, p: tuple[x, y, z: T]) =
+    shader.setParameter(name, cfloat(p.x), cfloat(p.y), cfloat(p.z))
+proc `[]=`*[T: cfloat|float](shader: Shader, name: string, p: tuple[x, y, z, w: T]) =
+    shader.setParameter(name, cfloat(p.x), cfloat(p.y), cfloat(p.z), cfloat(p.w))
+proc `[]=`*(shader: Shader, name: string, vector: Vector2f) =
+    shader.setParameter(name, vector)
+proc `[]=`*(shader: Shader, name: string, vector: Vector3f) =
+    shader.setParameter(name, vector)
+proc `[]=`*(shader: Shader, name: string, color: Color) =
+    shader.setParameter(name, color)
+proc `[]=`*(shader: Shader, name: string, transform: Transform) =
+    shader.setParameter(name, transform)
+proc `[]=`*(shader: Shader, name: string, texture: Texture) =
+    shader.setParameter(name, texture)
+proc `[]=`*(shader: Shader, name: string, currentTexture: type(CurrentTexture)) =
+    shader.setParameter(name, currentTexture)
+
+
 
 proc red*(color: Color): int =
   ## *Returns*: red component of a Color

src/csfml_graphics.nim

@@ -161,9 +161,9 @@ proc renderStates*(blendMode = BlendMode.Alpha, transform = Identity,
 
 
 type CurrentTextureType = object
-let CurrentTexture* = CurrentTextureType()
+let CurrentTexture* = CurrentTextureType() ## Placeholder argument for setParameter
 
-proc setParameter*(shader: Shader, name: cstring, currentTexture: CurrentTextureType) =
+proc setParameter*(shader: Shader, name: cstring, currentTexture: type(CurrentTexture)) =
   ## Change a texture parameter of a shader
   ##
   ## This function maps a shader texture variable to the