add fbm deformation effect

1 files changed, 42 insertions, 1 deletions

diff --git a/vertex.cginc b/vertex.cginc
index 84185c6..eba7031 100644
--- a/vertex.cginc
+++ b/vertex.cginc
@@ -44,6 +44,26 @@ void deform(inout float3 objPos) {
     objPos = sine_wave(objPos.xyz, amplitude, direction, k, omega, t);
   }
 #endif  // _VERTEX_DEFORMATION_SINE_WAVES
+#if defined(_VERTEX_DEFORMATION_FBM)
+  {
+    float t = _Time[3];
+    float amplitude = _Vertex_Deformation_FBM_Amplitude;
+    float gain = _Vertex_Deformation_FBM_Gain;
+    float lacunarity = _Vertex_Deformation_FBM_Lacunarity;
+    float scale = _Vertex_Deformation_FBM_Scale;
+    float octaves = _Vertex_Deformation_FBM_Octaves;
+    float3 velocity = _Vertex_Deformation_FBM_Velocity;
+    objPos = fbm(
+        objPos,
+        t,
+        amplitude,
+        gain,
+        lacunarity,
+        scale,
+        octaves,
+        velocity);
+  }
+#endif  // _VERTEX_DEFORMATION_FBM
 }
 
 void deform_normal(float3 objPos, inout float3 objNorm, inout float3 objTan) {
@@ -83,6 +103,28 @@ void deform_normal(float3 objPos, inout float3 objNorm, inout float3 objTan) {
     sine_wave_normal(objPos, objNorm, objTan, amplitude, direction, k, omega, t);
   }
 #endif  // _VERTEX_DEFORMATION_SINE_WAVES
+#if defined(_VERTEX_DEFORMATION_FBM)
+  {
+    float t = _Time[3];
+    float amplitude = _Vertex_Deformation_FBM_Amplitude;
+    float gain = _Vertex_Deformation_FBM_Gain;
+    float lacunarity = _Vertex_Deformation_FBM_Lacunarity;
+    float scale = _Vertex_Deformation_FBM_Scale;
+    float octaves = _Vertex_Deformation_FBM_Octaves;
+    float3 velocity = _Vertex_Deformation_FBM_Velocity;
+    fbm_normal(
+        objPos,
+        objNorm,
+        objTan,
+        t,
+        amplitude,
+        gain,
+        lacunarity,
+        scale,
+        octaves,
+        velocity);
+  }
+#endif  // _VERTEX_DEFORMATION_FBM
 }
 
 void propagateObjPos(inout v2f i) {
@@ -92,4 +134,3 @@ void propagateObjPos(inout v2f i) {
 }
 
 #endif  // __VERTEX_INC
-