split the update method up into components, easier to understand

lib/light_world.lua

@@ -105,8 +105,23 @@ function light_world:update()
 
   love.graphics.setColor(255, 255, 255)
   love.graphics.setBlendMode("alpha")
+  self:updateShadows()
+  self:updatePixelShadows()
+  self:updateGlow()
+  self:updateRefraction()
+  self:updateRelfection()
+  love.graphics.setShader()
+  love.graphics.setBlendMode("alpha")
+  love.graphics.setStencil()
+  love.graphics.setCanvas(self.last_buffer)
+  self.changed = false
+end
+
+function light_world:updateShadows()
+  if not self.optionShadows or not (self.isShadows or self.isLight) then
+    return
+  end
 
-  if self.optionShadows and (self.isShadows or self.isLight) then
   love.graphics.setShader(self.shader)
 
   for i = 1, #self.lights do
@@ -137,9 +152,12 @@ function light_world:update()
   for i = 1, #self.lights do
     self.lights[i]:drawShine()
   end
-  end
+end
 
-  if self.optionPixelShadows and self.isPixelShadows then
+function light_world:updatePixelShadows()
+  if not self.optionPixelShadows or not self.isPixelShadows then
+    return
+  end
   -- update pixel shadow
   love.graphics.setBlendMode("alpha")
 
@@ -171,9 +189,12 @@ function light_world:update()
   love.graphics.setColor({self.ambient[1], self.ambient[2], self.ambient[3]})
   love.graphics.rectangle("fill", self.translate_x, self.translate_y, love.graphics.getWidth(), love.graphics.getHeight())
   love.graphics.setBlendMode("alpha")
-  end
+end
 
-  if self.optionGlow and self.isGlow then
+function light_world:updateGlow()
+  if not self.optionGlow or not self.isGlow then
+    return
+  end
   -- create glow map
   self.glowMap:clear(0, 0, 0)
   love.graphics.setCanvas(self.glowMap)
@@ -193,9 +214,12 @@ function light_world:update()
   for i = 1, #self.body do
     self.body[i]:drawGlow()
   end
-  end
+end
 
-  if self.optionRefraction and self.isRefraction then
+function light_world:updateRefraction()
+  if not self.optionRefraction or not self.isRefraction then
+    return
+  end
   love.graphics.setShader()
   -- create refraction map
   self.refractionMap:clear()
@@ -203,9 +227,12 @@ function light_world:update()
   for i = 1, #self.body do
     self.body[i]:drawRefraction()
   end
-  end
+end
 
-  if self.optionReflection and self.isReflection then
+function light_world:updateRelfection()
+  if not self.optionReflection or not self.isReflection then
+    return
+  end
   -- create reflection map
   if self.changed then
     self.reflectionMap:clear(0, 0, 0)
@@ -214,14 +241,6 @@ function light_world:update()
       self.body[i]:drawReflection()
     end
   end
-  end
-
-  love.graphics.setShader()
-  love.graphics.setBlendMode("alpha")
-  love.graphics.setStencil()
-  love.graphics.setCanvas(self.last_buffer)
-
-  self.changed = false
 end
 
 function light_world:refreshScreenSize()
@@ -239,6 +258,7 @@ function light_world:refreshScreenSize()
   self.pixelShadow = love.graphics.newCanvas()
   self.pixelShadow2 = love.graphics.newCanvas()
 end
+
 -- draw shadow
 function light_world:drawShadow()
   if self.optionShadows and (self.isShadows or self.isLight) then