day 03-18: add leaves, leaf growing

* added simple leaf growing, leave occupy free adjacent space next to
  growng trunks
* addded leaves node

mods/ebiometrees/sapling.lua

@@ -1,19 +1,26 @@
 ebiometrees = {}
 
-function ebiometrees.get_sapling_grower(sprout_name)
-  local function rooter(pos)
-    minetest.set_node(pos, {name=sprout_name})
-  end
-  return rooter
+function ebiometrees.is_leaves_can_grow_here(pos)
+  return false
 end
 
-function ebiometrees.get_sprout_grower(trunk_name, apex_name)
-  local function grower(pos)
-    minetest.set_node(pos, {name=trunk_name})
-    local upper = {x=pos.x, y=pos.y+1, z=pos.z}
-    minetest.set_node(upper, {name=apex_name})
+function ebiometrees.grow_closure(nextstage)
+  local function growtree(pos)
+    minetest.set_node(pos, {name=nextstage})
   end
-  return grower
+  return growtree
+end
+
+function ebiometrees.leaves_grower(leaves_name)
+  local function grow_leaves(pos)
+    local free_node = minetest.find_node_near(pos, 1, "air")
+    if free_node
+    then
+      minetest.set_node(free_node, {name=leaves_name})
+    end
+    return true
+  end
+  return grow_leaves
 end
 
 function ebiometrees.root_sapling(pos)
@@ -21,8 +28,3 @@ function ebiometrees.root_sapling(pos)
   return false
 end
 
-function ebiometrees.set_rooting_sapling(itemstack, placer, pointed_thing)
-  itemstack = minetest.item_place(itemstack, placer, pointed_thing)
-  minetest.get_node_timer(pointed_thing.above):start(3)
-  return itemstack
-end

mods/ebiometrees/tree.lua

@@ -21,7 +21,9 @@ function ebiometrees.register_tree(modname, basename, data)
     drawtype = "plantlike",
     tiles = { modname.."_"..basename.."_sapling.png"},
     paramtype = "light",
-    on_timer = ebiometrees.get_sapling_grower(sprout_name),
+    on_timer = ebiometrees.grow_closure(
+      modname..":"..basename.."_sprout"
+    ),
     sunlight_propagates = true,
     walkable = false,
     groups = sapling_groups,
@@ -35,13 +37,28 @@ function ebiometrees.register_tree(modname, basename, data)
     paramtype = "light",
     sunlight_propagates = true,
     walkable = false,
-    on_timer = ebiometrees.get_sprout_grower(
-      modname..":"..basename.."_trunk_growing_straight",
-      modname..":"..basename.."_trunk_growing_terminal"),
+    on_timer = ebiometrees.grow_closure(
+      modname..":"..basename.."_trunk_growing_terminal"
+    ),
     groups = sprout_groups,
     on_construct = growth_timer
   })
-  -- registers tree and corresponding nodes
+  -- register tree leaves
+  local leaves_groups = table.copy(data.groups)
+  leaves_groups.leaves = 1
+  leaves_groups.leafdecay = 3
+  leaves_groups.snappy = 3
+  minetest.register_node(modname..":"..basename.."_leaves", {
+    description = S(data.description.." leaves"),
+    drawtype = "allfaces_optional",
+    waving = 1,
+    tiles = { modname.."_"..basename.."_leaves.png" },
+    special_tiles = { modname.."_"..basename.."_leaves_simple.png" },
+    paramtype = "light",
+    is_ground_content = false,
+    groups = leaves_groups
+  })
+  -- registers corresponding trunk nodes
   local trunk_groups = table.copy(data.groups)
   trunk_groups.choppy = 2 -- TODO: customizations
   local trunk_types = {"growing", "normal"}
@@ -54,7 +71,7 @@ function ebiometrees.register_tree(modname, basename, data)
     local texture_basename = modname.."_"..basename.."_trunk_"..trunk_type.."_"
     local subtype_tiles = {
       terminal = {
-        texture_basename.."terminal.png",
+        texture_basename.."top.png",
         texture_basename.."slice.png",
         texture_basename.."terminal.png"
       },
@@ -109,19 +126,23 @@ function ebiometrees.register_tree(modname, basename, data)
     }
     for _, trunk_subtype in ipairs(trunk_subtypes)
     do
-      minetest.register_node(
-        modname..":"..basename.."_trunk_"..trunk_type.."_"..trunk_subtype, {
+      local nodespec = {
           description = S(data.description.." "..trunk_type.." "..trunk_subtype),
           groups = trunk_groups,
           tiles = subtype_tiles[trunk_subtype],
           paramtype2 = "facedir",
           is_ground_content = false,
           on_place = minetest.rotate_node,
-          on_timer = function(pos)
-            return true
-          end,
           on_construct = growth_timer
-      })
+      }
+      if trunk_type == "growing"
+        then
+          nodespec.on_timer = ebiometrees.leaves_grower(
+            modname..":"..basename.."_leaves")
+      end
+      minetest.register_node(
+        modname..":"..basename.."_trunk_"..trunk_type.."_"..trunk_subtype,
+        nodespec)
     end
   end
 end