Scale rocks based on noise and add a random rotation

1 files changed, 26 insertions, 8 deletions

diff --git a/world/chunk/ChunkGen.gd b/world/chunk/ChunkGen.gd
index 5e99be8..d60b2e5 100644
--- a/world/chunk/ChunkGen.gd
+++ b/world/chunk/ChunkGen.gd
@@ -8,14 +8,20 @@ func _set_chunk_size(val):
     chunk_size = val * 2.0
 
 onready var noise = OpenSimplexNoise.new()
+onready var rng = RandomNumberGenerator.new()
+var _seed
 
 func _ready():
     randomize()
-    noise.seed = randi()
-    noise.octaves = 4
-    noise.period = 64
-    noise.persistence = 0.001
-    noise.lacunarity = 2.0
+    self._seed = randi()
+    self.noise.seed = self._seed
+    self.noise.seed = 0
+    self.noise.period = 16
+    self.noise.persistence = 0
+    self.rng.seed = self._seed
+
+func rng_2dv(coords:Vector2):
+    self.rng.seed = hash(coords)
 
 func gen_chunk(chunk):
     var gen_tree = Spatial.new()
@@ -43,7 +49,19 @@ func make_rock(chunk,xform:Transform):
     chunk.get_node("gen_tree").add_child(rock)
 
 func gen_rocks(chunk,chunk_coords:Vector2):
+    var coords = v3_coords(chunk_coords)
+    var basis = Basis()
     var world_coords = chunk_coords + v2_coords(chunk.transform.origin)
-    var noise_val = self.noise.get_noise_2dv(world_coords)
-    if noise_val > 0.4:
-        make_rock(chunk,Transform(Basis().scaled(Vector3(2.0,2.0,2.0)),v3_coords(chunk_coords)))
+    self.rng_2dv(world_coords)
+    var rng_val = self.rng.randf_range(0.0,TAU)
+    basis = Basis(Vector3.UP,rng_val) * basis
+    var noise_val = self.noise.get_noise_2dv(world_coords * 0.125)
+    if noise_val < 0.4:
+        return
+    noise_val = min(noise_val,0.6)
+    noise_val -= 0.4
+    noise_val /= 0.2
+    noise_val = lerp(1.0,4.0,noise_val)
+    basis = basis.scaled(Vector3.ONE*noise_val)
+    coords.y += (noise_val*5.0)-5.0
+    make_rock(chunk,Transform(basis,coords))