1 files changed, 32 insertions, 0 deletions
diff --git a/Water.gd b/Water.gd
index f9463e4..da7666c 100644
--- a/Water.gd
+++ b/Water.gd
@@ -78,4 +78,36 @@ func _set_time(val):
 
 func _physics_process(delta):
     self._time += delta
+    #self._time = 0.0
 
+func gertsner_wave(pos, idx):
+    if idx >= waves.size(): return 0.0
+    var wave = waves[idx]
+    var k = wave._k
+    var a = wave._a
+    var t = wave._t
+
+    var d = wave.direction.normalized()
+    var f = k * (d.dot(Vector2(pos.x,pos.z)) - t)
+
+    var tmp = a * cos(f)
+    var new_pos = Vector3(d.x * tmp, a * sin(f), d.y * tmp)
+
+    return new_pos
+
+func sample_wave(pos):
+    var new_pos = Vector3(pos.x,0,pos.z)
+    for idx in waves.size():
+        new_pos += gertsner_wave(pos, idx)
+    return new_pos
+
+func height(pos):
+    var old_pos = pos
+    var y = old_pos.y
+    for _i in range(2):
+        var new_pos = sample_wave(old_pos)
+        y = new_pos.y
+        new_pos = old_pos - (new_pos - old_pos)
+        old_pos = new_pos
+    y += self.global_transform.origin.y
+    return y