Major overhaul. Separate cave decorations from mapgen.

deco_coral.lua

@@ -0,0 +1,97 @@
+
+minetest.register_node("fun_caves:pillar_coral", {
+	description = "Pillar Coral",
+	tiles = {"fun_caves_pillar_coral.png"},
+	paramtype = "light",
+	light_source = 2,
+	groups = {cracky = 3, stone=1},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+
+minetest.register_node("fun_caves:brain_coral", {
+	description = "Brain Coral",
+	tiles = {"fun_caves_brain_coral.png"},
+	light_source = 4,
+	groups = {cracky = 3, stone=1,},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+
+minetest.register_node("fun_caves:dragon_eye", {
+	description = "Dragon Eye",
+	tiles = {"fun_caves_dragon_eye.png"},
+	light_source = 4,
+	groups = {cracky = 3, stone=1,},
+	sounds = default.node_sound_stone_defaults(),
+})
+
+
+minetest.register_node("fun_caves:staghorn_coral", {
+	description = "Staghorn Coral",
+	drawtype = "plantlike",
+	tiles = {"fun_caves_staghorn_coral.png"},
+	waving = false,
+	sunlight_propagates = true,
+	paramtype = "light",
+	light_source = 2,
+	walkable = false,
+	groups = {cracky = 3, stone=1, attached_node=1, sea=1},
+	sounds = default.node_sound_stone_defaults(),
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.5, -0.5, -0.5, 0.5, -5/16, 0.5},
+	},
+})
+
+function fun_caves.sea_plants()
+	if y >= light_depth and (data[index_3d] == node["sand"] or data[index_3d] == node["dirt"]) and (data[index_3d_above] == node["water_source"] or data[index_3d_above] == node["river_water_source"]) then
+		-- Check the biomes and plant water plants, if called for.
+		biome = valc.biome_ids[biomemap[index_2d]]
+		if y < water_level and data[index_3d_above + ystride] == node["water_source"] and table.contains(coral_biomes, biome) and n21[index_2d] < -0.1 and math_random(1,3) ~= 1 then
+			sr = math_random(1,100)
+			if sr < 4 then
+				data[index_3d_above] = node["brain_coral"]
+			elseif sr < 6 then
+				data[index_3d_above] = node["dragon_eye"]
+			elseif sr < 35 then
+				data[index_3d_above] = node["staghorn_coral"]
+			elseif sr < 100 then
+				data[index_3d_above] = node["pillar_coral"]
+			end
+		elseif surround then
+			for _, desc in pairs(valc.water_plants) do
+				placeable = false
+
+				if not node_match_cache[desc] then
+					node_match_cache[desc] = {}
+				end
+
+				if node_match_cache[desc][data[index_3d]] then
+					placeable = node_match_cache[desc][data[index_3d]]
+				else
+					-- This is a great way to match all node type strings
+					-- against a given node (or nodes). However, it's slow.
+					-- To speed it up, we cache the results for each plant
+					-- on each node, and avoid calling find_nodes every time.
+					pos, count = minetest.find_nodes_in_area({x=x,y=y,z=z}, {x=x,y=y,z=z}, desc.place_on)
+					if #pos > 0 then
+						placeable = true
+					end
+					node_match_cache[desc][data[index_3d]] = placeable 
+				end
+
+				if placeable and desc.fill_ratio and desc.content_id then
+					biome = valc.biome_ids[biomemap[index_2d]]
+
+					if not desc.biomes or (biome and desc.biomes and table.contains(desc.biomes, biome)) then
+						if math_random() <= desc.fill_ratio then
+							data[index_3d] = desc.content_id
+							write = true
+						end
+					end
+				end
+			end
+		end
+	end
+end