Merge pull request #1029 from ZomgPonies/color

Simpler color mixing

code/modules/reagents/Chemistry-Colours.dm

@@ -1,66 +1,29 @@
-/proc/mix_color_from_reagents(var/list/reagent_list)
-	if(!reagent_list || !length(reagent_list))
-		return 0
+/*
+ * Returns:
+ * 	#RRGGBB(AA) on success, null on failure
+ */
+/proc/mix_color_from_reagents(const/list/reagent_list)
+	if(!istype(reagent_list))
+		return
 
-	var/contents = length(reagent_list)
-	var/list/weight = new /list(contents)
-	var/list/redcolor = new /list(contents)
-	var/list/greencolor = new /list(contents)
-	var/list/bluecolor = new /list(contents)
-	var/i
+	var/color
+	var/reagent_color
+	var/vol_counter = 0
+	var/vol_temp
+	// see libs/IconProcs/IconProcs.dm
+	for(var/datum/reagent/reagent in reagent_list)
+		if(reagent.id == "blood" && reagent.data["blood_colour"])
+			reagent_color = reagent.data["blood_colour"]
+		else
+			reagent_color = reagent.color
 
-	//fill the list of weights
-	for(i=1; i<=contents; i++)
-		var/datum/reagent/re = reagent_list[i]
-		var/reagentweight = re.volume
-		if(istype(re, /datum/reagent/paint))
-			reagentweight *= 20 //Paint colours a mixture twenty times as much
-		weight[i] = reagentweight
+		vol_temp = reagent.volume
+		vol_counter += vol_temp
 
+		if(isnull(color))
+			color = reagent.color
+		else if(length(color) >= length(reagent_color))
+			color = BlendRGB(color, reagent_color, vol_temp/vol_counter)
+		else
+			color = BlendRGB(reagent_color, color, vol_temp/vol_counter)
 
-	//fill the lists of colours
-	for(i=1; i<=contents; i++)
-		var/datum/reagent/re = reagent_list[i]
-		var/hue = re.color
-		if(length(hue) != 7)
-			return 0
-		redcolor[i]=hex2num(copytext(hue,2,4))
-		greencolor[i]=hex2num(copytext(hue,4,6))
-		bluecolor[i]=hex2num(copytext(hue,6,8))
-
-	//mix all the colors
-	var/red = mixOneColor(weight,redcolor)
-	var/green = mixOneColor(weight,greencolor)
-	var/blue = mixOneColor(weight,bluecolor)
-
-	//assemble all the pieces
-	var/finalcolor = rgb(red, green, blue)
-	return finalcolor
-
-/proc/mixOneColor(var/list/weight, var/list/color)
-	if (!weight || !color || length(weight)!=length(color))
-		return 0
-
-	var/contents = length(weight)
-	var/i
-
-	//normalize weights
-	var/listsum = 0
-	for(i=1; i<=contents; i++)
-		listsum += weight[i]
-	for(i=1; i<=contents; i++)
-		weight[i] /= listsum
-
-	//mix them
-	var/mixedcolor = 0
-	for(i=1; i<=contents; i++)
-		mixedcolor += weight[i]*color[i]
-	mixedcolor = round(mixedcolor)
-
-	//until someone writes a formal proof for this algorithm, let's keep this in
-//	if(mixedcolor<0x00 || mixedcolor>0xFF)
-//		return 0
-	//that's not the kind of operation we are running here, nerd
-	mixedcolor=min(max(mixedcolor,0),255)
-
-	return mixedcolor