Merge branch 'pegmatite'

Conflicts:
	mapgen.lua

rocks/init.lua

@@ -29,6 +29,7 @@ local modpath=minetest.get_modpath(minetest.get_current_modname())
 dofile(modpath.."/sed.lua")
 dofile(modpath.."/ign.lua")
 dofile(modpath.."/skarn.lua")
+dofile(modpath.."/pegmatite.lua")
 
 minetest.register_on_mapgen_init(function(mapgen_params)
  -- todo: disable caves and ores

rocks/pegmatite.lua

@@ -0,0 +1,37 @@
+--
+-- Pegmatite vein
+--
+
+local CommonRarity=0.024
+local CommonRadius=8
+local CommonWherein={ "rocks:granite" }
+
+minetest.register_node( "rocks:pegmatite", {
+	description = S("Pegmatite"),
+	tiles = { "rocks_Pegmatite.png" },
+	groups = {cracky=3, stone=1}, 
+	is_ground_content = true, sounds = default.node_sound_stone_defaults(),
+})
+
+-- ores have to be redefined for pegmatite background
+
+-- Lepidolite         Li    Medium Pegmatite (2.5%)
+-- Cassiterite        Sn    Strong Granite, Pegmatite (1.5%)
+-- Pollucite          Cs    Strong Pegmatite (0.1%)
+-- Scheelite          W     Medium SEDEX, Pegmatite (2%), Skarn
+-- Spodumene          Li    Strong Pegmatite (7%)
+-- Tantalite          Ta    Strong Pegmatite (2%)
+-- Wolframite         W     Medium Pegmatite (1%)
+-- Spodumene        7%
+-- Muscovite (mica) 7%
+-- Kyanite          5%
+
+-- pegmatites are only 1 kind
+rocks.register_vein("rocks:pegmatite",{
+  wherein={ "rocks:granite" },
+  miny=-160, maxy=20,
+  radius={ average=8, amplitude=4, frequency=5 },
+  density=80, rarity=CommonRarity,
+  ores={
+  }
+ })