Add gertsner wave shader

1 files changed, 48 insertions, 0 deletions

diff --git a/Wave.gd b/Wave.gd
new file mode 100644
index 0000000..c876831
--- /dev/null
+++ b/Wave.gd
@@ -0,0 +1,48 @@
+class_name Wave
+extends Resource
+
+export var steepness = 1.0 setget set_steepness
+export var wavelength = 1.0 setget set_wavelength
+export var direction = Vector2(1.0,0.0) setget set_direction
+
+var _k = 1.0 setget _set_k
+var _a = 1.0 setget _set_a
+var _c = 1.0 setget _set_c
+var _time = 0.0 setget _set_time
+var _t = 1.0 setget _set_t
+
+func _init(s, w, d, t):
+    self.steepness = s
+    self.wavelength = w
+    self.direction = d
+    self._time = t
+
+func set_steepness(val):
+    steepness = val
+    self._a = steepness / _k
+
+func set_wavelength(val):
+    wavelength = val
+    self._k = TAU / wavelength
+
+func set_direction(val):
+    direction = val
+
+func _set_k(val):
+    _k = val
+    self._a = steepness / _k
+    self._c = sqrt(9.8 / _k)
+
+func _set_a(val):
+    _a = val
+
+func _set_c(val):
+    _c = val
+    self._t = _c * _time
+
+func _set_time(val):
+    _time = val
+    self._t = _c * _time
+
+func _set_t(val):
+    _t = val