add logical time feature

the idea is that a remote piece of software s.a. TiXL sends in its
logical time every once in a while. udon recovers it, interpolates
and smooths it, and feeds it to the shader. Anything which is periodic
on units of 1.0 "seconds" retains its periodicity under changes to the
rate of passage of time.

1 files changed, 17 insertions, 12 deletions

diff --git a/vertex.cginc b/vertex.cginc
index eba7031..b5750c6 100644
--- a/vertex.cginc
+++ b/vertex.cginc
@@ -1,11 +1,14 @@
 #ifndef __VERTEX_INC
 #define __VERTEX_INC
 
+#include "globals.cginc"
 #include "vertex_deformation.hlsl"
 
 #define FOO(x) (x)
 
 void deform(inout float3 objPos) {
+  const float t = getTime();
+
 #if defined(_VERTEX_DEFORMATION_XZ_TUBE)
   {
     float t = _Vertex_Deformation_XZ_Tube_t;
@@ -30,23 +33,23 @@ void deform(inout float3 objPos) {
   {
     float A = _Vertex_Deformation_Seal_A;
     float k = _Vertex_Deformation_Seal_k;
-    float t = _Time[3] * _Vertex_Deformation_Seal_t;
-    objPos = seal(objPos.xyz, A, k, t);
+    float st = t * _Vertex_Deformation_Seal_t;
+    objPos = seal(objPos.xyz, A, k, st);
   }
 #endif  // _VERTEX_DEFORMATION_SEAL
 #if defined(_VERTEX_DEFORMATION_SINE_WAVES)
   {
-    float t = _Time[3];
+    float st = t * 10;
     float3 amplitude = _Vertex_Deformation_Sine_Waves_Amplitude;
     float3 direction = _Vertex_Deformation_Sine_Waves_Direction;
     float3 k = _Vertex_Deformation_Sine_Waves_k;
     float3 omega = _Vertex_Deformation_Sine_Waves_omega;
-    objPos = sine_wave(objPos.xyz, amplitude, direction, k, omega, t);
+    objPos = sine_wave(objPos.xyz, amplitude, direction, k, omega, st);
   }
 #endif  // _VERTEX_DEFORMATION_SINE_WAVES
 #if defined(_VERTEX_DEFORMATION_FBM)
   {
-    float t = _Time[3];
+    float st = t;
     float amplitude = _Vertex_Deformation_FBM_Amplitude;
     float gain = _Vertex_Deformation_FBM_Gain;
     float lacunarity = _Vertex_Deformation_FBM_Lacunarity;
@@ -55,7 +58,7 @@ void deform(inout float3 objPos) {
     float3 velocity = _Vertex_Deformation_FBM_Velocity;
     objPos = fbm(
         objPos,
-        t,
+        st,
         amplitude,
         gain,
         lacunarity,
@@ -67,6 +70,8 @@ void deform(inout float3 objPos) {
 }
 
 void deform_normal(float3 objPos, inout float3 objNorm, inout float3 objTan) {
+  const float t = getTime();
+
 #if defined(_VERTEX_DEFORMATION_XZ_TUBE)
   {
     float t = _Vertex_Deformation_XZ_Tube_t;
@@ -89,23 +94,23 @@ void deform_normal(float3 objPos, inout float3 objNorm, inout float3 objTan) {
   {
     float A = _Vertex_Deformation_Seal_A;
     float k = _Vertex_Deformation_Seal_k;
-    float t = _Time[3] * _Vertex_Deformation_Seal_t;
-    seal_normal(objPos, objNorm, objTan, A, k, t);
+    float st = t * _Vertex_Deformation_Seal_t;
+    seal_normal(objPos, objNorm, objTan, A, k, st);
   }
 #endif  // _VERTEX_DEFORMATION_SEAL
 #if defined(_VERTEX_DEFORMATION_SINE_WAVES)
   {
-    float t = _Time[3];
+    float st = t * 10;
     float3 amplitude = _Vertex_Deformation_Sine_Waves_Amplitude;
     float3 direction = _Vertex_Deformation_Sine_Waves_Direction;
     float3 k = _Vertex_Deformation_Sine_Waves_k;
     float3 omega = _Vertex_Deformation_Sine_Waves_omega;
-    sine_wave_normal(objPos, objNorm, objTan, amplitude, direction, k, omega, t);
+    sine_wave_normal(objPos, objNorm, objTan, amplitude, direction, k, omega, st);
   }
 #endif  // _VERTEX_DEFORMATION_SINE_WAVES
 #if defined(_VERTEX_DEFORMATION_FBM)
   {
-    float t = _Time[3];
+    float st = t;
     float amplitude = _Vertex_Deformation_FBM_Amplitude;
     float gain = _Vertex_Deformation_FBM_Gain;
     float lacunarity = _Vertex_Deformation_FBM_Lacunarity;
@@ -116,7 +121,7 @@ void deform_normal(float3 objPos, inout float3 objNorm, inout float3 objTan) {
         objPos,
         objNorm,
         objTan,
-        t,
+        st,
         amplitude,
         gain,
         lacunarity,