Merge pull request 'Optional connected glass support' (#1939) from AFCMS/MineClone2:connected_glass into master

Reviewed-on: https://git.minetest.land/MineClone2/MineClone2/pulls/1939

mods/ITEMS/mcl_core/nodes_glass.lua

@@ -5,10 +5,11 @@ local mod_doc = minetest.get_modpath("doc")
 minetest.register_node("mcl_core:glass", {
 	description = S("Glass"),
 	_doc_items_longdesc = S("A decorative and mostly transparent block."),
-	drawtype = "glasslike",
+	drawtype = "glasslike_framed_optional",
 	is_ground_content = false,
-	tiles = {"default_glass.png"},
+	tiles = {"default_glass.png", "default_glass_detail.png"},
 	paramtype = "light",
+	paramtype2 = "glasslikeliquidlevel",
 	sunlight_propagates = true,
 	stack_max = 64,
 	groups = {handy=1, glass=1, building_block=1, material_glass=1},
@@ -39,10 +40,11 @@ function mcl_core.add_stained_glass(desc, recipeitem, colorgroup, color)
 		_doc_items_create_entry = create_entry,
 		_doc_items_entry_name = entry_name,
 		_doc_items_longdesc = longdesc,
-		drawtype = "glasslike",
+		drawtype = "glasslike_framed_optional",
 		is_ground_content = false,
-		tiles = {"mcl_core_glass_"..color..".png"},
+		tiles = {"mcl_core_glass_"..color..".png", "mcl_core_glass_"..color.."_detail.png"},
 		paramtype = "light",
+		paramtype2 = "glasslikeliquidlevel",
 		sunlight_propagates = true,
 		use_texture_alpha = minetest.features.use_texture_alpha_string_modes and "blend" or true,
 		stack_max = 64,