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Default: Generalise, optimise and simplify grass spread function

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Credit to tenplus1 for the suggestion to generalise for mod use.
Mods can add mod nodes to 'group:spreading_dirt_type' enabling the
function to work with mod nodes.

Add some nodes to this group.

Removing 'dirt_with_grass' etc. from 'neighbors' stops the ABM action
running everywhere and constantly, on the dirt nodes immediately below
the surface nodes. Now the action only runs in the rare case of a dirt
node with neighbouring air, grass decorations or snow.

Remove check for air above to allow grass to spread under light-
transmitting nodes such as fences, walls, plants. This causes spread
under slabs, stairs and glass, when near air, but seems worth it.

Remove unnecessary check for nil node.
This commit is contained in:
paramat
2016-09-22 11:56:15 +01:00
parent 5e4a6e8ac6
commit c0de5646d2
2 changed files with 15 additions and 30 deletions
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6
mods/default/nodes.lua
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@ -332,7 +332,7 @@ minetest.register_node("default:dirt_with_grass", {
tiles = {"default_grass.png", "default_dirt.png",
{name = "default_dirt.png^default_grass_side.png",
tileable_vertical = false}},
groups = {crumbly = 3, soil = 1},
groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1},
drop = 'default:dirt',
sounds = default.node_sound_dirt_defaults({
footstep = {name = "default_grass_footstep", gain = 0.25},
@ -357,7 +357,7 @@ minetest.register_node("default:dirt_with_dry_grass", {
"default_dirt.png",
{name = "default_dirt.png^default_dry_grass_side.png",
tileable_vertical = false}},
groups = {crumbly = 3, soil = 1},
groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1},
drop = 'default:dirt',
sounds = default.node_sound_dirt_defaults({
footstep = {name = "default_grass_footstep", gain = 0.4},
@ -369,7 +369,7 @@ minetest.register_node("default:dirt_with_snow", {
tiles = {"default_snow.png", "default_dirt.png",
{name = "default_dirt.png^default_snow_side.png",
tileable_vertical = false}},
groups = {crumbly = 3, soil = 1},
groups = {crumbly = 3, soil = 1, spreading_dirt_type = 1},
drop = 'default:dirt',
sounds = default.node_sound_dirt_defaults({
footstep = {name = "default_snow_footstep", gain = 0.15},