Screw commit history.

code/game/objects/items/stacks/stack.dm

@@ -11,6 +11,7 @@
 /obj/item/stack
 	icon = 'icons/obj/stack_objects.dmi'
 	gender = PLURAL
+	material_modifier = 0.01
 	var/list/datum/stack_recipe/recipes
 	var/singular_name
 	var/amount = 1
@@ -21,6 +22,9 @@
 	var/merge_type = null // This path and its children should merge with this stack, defaults to src.type
 	var/full_w_class = WEIGHT_CLASS_NORMAL //The weight class the stack should have at amount > 2/3rds max_amount
 	var/novariants = TRUE //Determines whether the item should update it's sprites based on amount.
+	var/mats_per_stack = 0
+	///Datum material type that this stack is made of
+	var/material_type
 	//NOTE: When adding grind_results, the amounts should be for an INDIVIDUAL ITEM - these amounts will be multiplied by the stack size in on_grind()
 	var/obj/structure/table/tableVariant // we tables now (stores table variant to be built from this stack)
 
@@ -35,7 +39,6 @@
 	return TRUE
 
 /obj/item/stack/Initialize(mapload, new_amount, merge = TRUE)
-	. = ..()
 	if(new_amount != null)
 		amount = new_amount
 	while(amount > max_amount)
@@ -43,13 +46,29 @@
 		new type(loc, max_amount, FALSE)
 	if(!merge_type)
 		merge_type = type
+	if(custom_materials && custom_materials.len)
+		for(var/i in custom_materials)
+			custom_materials[getmaterialref(i)] = mats_per_stack * amount
+	. = ..()
 	if(merge)
 		for(var/obj/item/stack/S in loc)
 			if(S.merge_type == merge_type)
 				merge(S)
+	var/list/temp_recipes = get_main_recipes()
+	recipes = temp_recipes.Copy()
+	if(material_type)
+		var/datum/material/M = getmaterialref(material_type) //First/main material
+		for(var/i in M.categories)
+			switch(i)
+				if(MAT_CATEGORY_RIGID)
+					var/list/temp = SSmaterials.rigid_stack_recipes.Copy()
+					recipes += temp
 	update_weight()
 	update_icon()
 
+/obj/item/stack/proc/get_main_recipes()
+	return list()//empty list
+
 /obj/item/stack/proc/update_weight()
 	if(amount <= (max_amount * (1/3)))
 		w_class = CLAMP(full_w_class-2, WEIGHT_CLASS_TINY, full_w_class)
@@ -204,6 +223,12 @@
 		use(R.req_amount * multiplier)
 		log_craft("[O] crafted by [usr] at [loc_name(O.loc)]")
 
+		if(R.applies_mats && custom_materials && custom_materials.len)
+			var/list/used_materials = list()
+			for(var/i in custom_materials)
+				used_materials[getmaterialref(i)] = R.req_amount / R.res_amount * (MINERAL_MATERIAL_AMOUNT / custom_materials.len)
+			O.set_custom_materials(used_materials)
+
 		//START: oh fuck i'm so sorry
 		if(istype(O, /obj/structure/windoor_assembly))
 			var/obj/structure/windoor_assembly/W = O
@@ -288,6 +313,8 @@
 	amount -= used
 	if(check)
 		zero_amount()
+	for(var/i in custom_materials)
+		custom_materials[i] = amount * mats_per_stack
 	update_icon()
 	update_weight()
 	return TRUE
@@ -319,6 +346,10 @@
 		source.add_charge(amount * cost)
 	else
 		src.amount += amount
+	if(custom_materials && custom_materials.len)
+		for(var/i in custom_materials)
+			custom_materials[getmaterialref(i)] = MINERAL_MATERIAL_AMOUNT * src.amount
+		set_custom_materials() //Refresh
 	update_icon()
 	update_weight()
 
@@ -423,8 +454,9 @@
 	var/on_floor = FALSE
 	var/window_checks = FALSE
 	var/placement_checks = FALSE
+	var/applies_mats = FALSE
 
-/datum/stack_recipe/New(title, result_type, req_amount = 1, res_amount = 1, max_res_amount = 1,time = 0, one_per_turf = FALSE, on_floor = FALSE, window_checks = FALSE, placement_checks = FALSE )
+/datum/stack_recipe/New(title, result_type, req_amount = 1, res_amount = 1, max_res_amount = 1,time = 0, one_per_turf = FALSE, on_floor = FALSE, window_checks = FALSE, placement_checks = FALSE, applies_mats = FALSE)
 
 
 	src.title = title
@@ -437,6 +469,7 @@
 	src.on_floor = on_floor
 	src.window_checks = window_checks
 	src.placement_checks = placement_checks
+	src.applies_mats = applies_mats
 /*
  * Recipe list datum
  */