automatic tree growth is a b*tch

scripts/tests/e2/trees.lua

@@ -5,10 +5,13 @@ module("tests.e2.trees", package.seeall, lunit.testcase )
 function setup()
     eressea.game.reset()
     eressea.settings.set("rules.food.flags", "4") -- food is free
+    eressea.settings.set("rules.treeseeds.chance", "0.0") -- trees make no seeds
+    eressea.settings.set("rules.grow.formula", "0") -- no tree or seed growth
     eressea.settings.set("NewbieImmunity", "0")
 end
 
 function test_no_growth()
+    eressea.settings.set("rules.grow.formula", "2") -- E2 growth rules
     set_turn(204)
     assert_equal('spring', get_season())
     local r = region.create(0, 0, 'plain')
@@ -21,6 +24,20 @@ function test_no_growth()
     assert_equal(0, r:get_resource('tree'))
 end
 
+function test_spring_growth()
+    eressea.settings.set("rules.grow.formula", "2") -- E2 growth rules
+    set_turn(204)
+    assert_equal('spring', get_season())
+    local r = region.create(0, 0, 'plain')
+    r:set_resource('seed', 6)
+    r:set_resource('sapling', 17)
+    r:set_resource('tree', 0)
+    process_orders()
+    assert_equal(5, r:get_resource('seed'))
+    assert_equal(16, r:get_resource('sapling'))
+    assert_equal(2, r:get_resource('tree'))
+end
+
 -- hebalism < T6 cannot plant
 function test_plant_fail()
     set_turn(184)
@@ -63,14 +80,22 @@ end
 
 -- in spring, herbalism >= T12 plants saplings at 10:1 rate
 function test_plant_spring_saplings()
-    set_turn(204)
+    set_turn(203)
     assert_equal('spring', get_season())
     local f = faction.create('goblin')
     local r = region.create(0, 0, 'plain')
+    local u = unit.create(f, r)
     r:set_resource('seed', 0)
     r:set_resource('sapling', 0)
     r:set_resource('tree', 0)
-    local u = unit.create(f, r)
+
+    assert_equal('spring', get_season())
+    process_orders() -- to initialize at_germs
+    assert_equal(0, r:get_resource('sapling'))
+    assert_equal(0, r:get_resource('seed'))
+    assert_equal(0, r:get_resource('tree'))
+
+    assert_equal('spring', get_season())
     u:set_skill('herbalism', 12)
     u:add_item('seed', 20)
     u:add_order("PFLANZE 20 Samen") -- limited by herbalism
@@ -84,13 +109,20 @@ end
 -- herbalism < T12 means we are still planting seeds at 1:1
 function test_plant_spring_seeds()
     set_turn(204)
-    assert_equal('spring', get_season())
     local f = faction.create('goblin')
     local r = region.create(0, 0, 'plain')
+    local u = unit.create(f, r)
     r:set_resource('seed', 0)
     r:set_resource('sapling', 0)
     r:set_resource('tree', 0)
-    local u = unit.create(f, r)
+
+    assert_equal('spring', get_season())
+    process_orders() -- to initialize at_germs
+    assert_equal(0, r:get_resource('sapling'))
+    assert_equal(0, r:get_resource('seed'))
+    assert_equal(0, r:get_resource('tree'))
+
+    assert_equal('spring', get_season())
     u:set_skill('herbalism', 10)
     u:add_item('seed', 40)
     u:add_order("PFLANZE 10 Samen")

src/laws.c

@@ -603,9 +603,9 @@ growing_trees(region * r, const season_t current_season, const season_t last_wee
 {
     int grownup_trees, i, seeds, sprout;
     attrib *a;
+    double seedchance = config_get_flt("rules.treeseeds.chance", 0.01F) * RESOURCE_QUANTITY;
 
     if (current_season == SEASON_SUMMER || current_season == SEASON_AUTUMN) {
-        double seedchance = 0.01F * RESOURCE_QUANTITY;
         int mp, elves = count_race(r, get_race(RC_ELF));
         direction_t d;
 
@@ -653,6 +653,7 @@ growing_trees(region * r, const season_t current_season, const season_t last_wee
 
         /* Gesamtzahl der Samen:
          * bis zu 6% (FORESTGROWTH*3) der Baeume samen in die Nachbarregionen */
+        if (seedchance > 0) {
             seeds = (rtrees(r, 2) * FORESTGROWTH * 3) / 1000000;
             for (d = 0; d != MAXDIRECTIONS; ++d) {
                 region *r2 = rconnect(r, d);
@@ -671,11 +672,9 @@ growing_trees(region * r, const season_t current_season, const season_t last_wee
                     rsettrees(r2, 0, rtrees(r2, 0) + sprout);
                 }
             }
-
+        }
     }
     else if (current_season == SEASON_SPRING) {
-        int growth;
-
         /* in at_germs merken uns die Zahl der Samen und Sproesslinge, die
          * dieses Jahr aelter werden duerfen, damit nicht ein Same im selben
          * Zyklus zum Baum werden kann */
@@ -685,19 +684,11 @@ growing_trees(region * r, const season_t current_season, const season_t last_wee
             a->data.sa[0] = cap_short(rtrees(r, 0));
             a->data.sa[1] = cap_short(rtrees(r, 1));
         }
-        /* wir haben 6 Wochen zum wachsen, jeder Same/Spross hat 18% Chance
-         * zu wachsen, damit sollten nach 5-6 Wochen alle gewachsen sein */
-        growth = 1800;
 
         /* Baumwachstum */
         sprout = rtrees(r, 1);
         if (sprout > a->data.sa[1]) sprout = a->data.sa[1];
-        grownup_trees = 0;
-
-        for (i = 0; i < sprout; i++) {
-            if (rng_int() % 10000 < growth)
-                grownup_trees++;
-        }
+        grownup_trees = sprout / 6;
         /* aus dem Sproesslingepool dieses Jahres abziehen */
         a->data.sa[1] = (short)(sprout - grownup_trees);
         /* aus dem gesamt Sproesslingepool abziehen */
@@ -708,12 +699,7 @@ growing_trees(region * r, const season_t current_season, const season_t last_wee
         /* Samenwachstum */
         seeds = rtrees(r, 0);
         if (seeds > a->data.sa[0]) seeds = a->data.sa[0];
-        sprout = 0;
-
-        for (i = 0; i < seeds; i++) {
-            if (rng_int() % 10000 < growth)
-                sprout++;
-        }
+        sprout = seeds / 6;
         /* aus dem Samenpool dieses Jahres abziehen */
         a->data.sa[0] = (short)(seeds - sprout);
         /* aus dem gesamt Samenpool abziehen */