Working on adding a whole new set of trees to the mod

Most of the added code written by RealBadAngel
Also adds a couple of additional biome controls to jungle trees and conifers.
Also adds a text file describing the biome settings in a human-readable manner.

At present, this doesn't actually add anything new, it just refactors the
code to allow for more trees, and adds a bunch of biome definitions, tree
models, textures, etc. but no code to use them, yet.

1 files changed, 148 insertions, 0 deletions

diff --git a/biome_defs.lua b/biome_defs.lua
new file mode 100644
index 0000000..c03f673
--- /dev/null
+++ b/biome_defs.lua
@@ -0,0 +1,148 @@
+--[[
+
+-- Example biome definition:
+
+mytree_biome = {
+	surface = "default:dirt_with_grass",	-- must grow on these nodes only
+	avoid_nodes = {"default:tree"},		-- avoid spawning near these
+	avoid_radius = 12,			-- Keep this much room around the above avoid items
+	seed_diff = 12345,			-- perlin seed-diff for "generally able to grow plants here" control
+	neighbors = "default:dirt_with_grass",	-- this node must be adjacent to the node being spawned on
+	ncount = 8,				-- and there must be this many of them
+	depth = 1,				-- spawning surface must be no deeper than this
+	min_elevation = -5,			-- minimum elevation to spawn on
+	max_elevation = 10,			-- maximum elevation
+	near_nodes = {"default:water_source"},	-- trees will only spawn near these nodes
+	near_nodes_size = 10,			-- within this radius of at least one of them
+	near_nodes_count = 20,			-- there must ne this many of those nodes in the area
+	temp_min = 0.5,				-- minimum allowable temperature (highest temperature map perlin value)
+	temp_max = 0.1,				-- maximum allowable temperature (lowest perlin value)
+}
+]]--
+
+moretrees.jungletree_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 12,
+	seed_diff = 329,
+	min_elevation = -5,
+	max_elevation = 10,
+	near_nodes = {"default:water_source"},
+	near_nodes_size = 15,
+	near_nodes_count = 10,
+--	temp_min = 0.05,
+}
+
+moretrees.conifer_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 10,
+	seed_diff = 359,
+	min_elevation = 25,
+	temp_min = 0.9,
+	temp_max = 0.3,
+}
+
+moretrees.palm_biome = {
+	surface = "default:sand",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 5,
+	seed_diff = 330,
+	min_elevation = -1,
+	max_elevation = 1,
+	near_nodes = {"default:water_source"},
+	near_nodes_size = 15,
+	near_nodes_count = 10,
+	temp_min = 0.15,
+	temp_max = -0.15,
+}
+
+moretrees.apple_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 15,
+	seed_diff = 331,
+	min_elevation = 1,
+	max_elevation = 10,
+	temp_min = 0.1,
+	temp_max = -0.15,
+}
+
+moretrees.oak_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 15,
+	seed_diff = 332,
+	min_elevation = 0,
+	max_elevation = 10,
+	temp_min = 0.4,
+	temp_max = 0.2,
+}
+
+moretrees.sequoia_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 10,
+	seed_diff = 333,
+	min_elevation = 0,
+	max_elevation = 10,
+	temp_min = 1,
+	temp_max = -0.4,
+}
+
+moretrees.birch_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 5,
+	seed_diff = 334,
+	min_elevation = 10,
+	max_elevation = 15,
+	temp_min = 0.9,
+	temp_max = 0.3,
+}
+
+moretrees.spruce_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 10,
+	seed_diff = 335,
+	min_elevation = 20,
+	temp_min = 0.9,
+	temp_max = 0.7,
+}
+
+moretrees.pine_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 10,
+	seed_diff = 336,
+	near_nodes = {"default:water_source"},
+	near_nodes_size = 15,
+	near_nodes_count = 5,
+}
+
+moretrees.willow_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 20,
+	seed_diff = 337,
+	min_elevation = -5,
+	max_elevation = 5,
+	near_nodes = {"default:water_source"},
+	near_nodes_size = 15,
+	near_nodes_count = 5,
+}
+
+moretrees.rubber_biome = {
+	surface = "default:dirt_with_grass",
+	avoid_nodes = moretrees.avoidnodes,
+	avoid_radius = 20,
+	seed_diff = 338,
+	min_elevation = -5,
+	max_elevation = 5,
+	near_nodes = {"default:water_source"},
+	near_nodes_size = 15,
+	near_nodes_count = 10,
+	temp_min = -0.15,
+}
+