Only update the time uniform for the shader each frame

1 files changed, 10 insertions, 8 deletions

diff --git a/water/Wave.gdshader b/water/Wave.gdshader
index ee06fe0..95d064e 100644
--- a/water/Wave.gdshader
+++ b/water/Wave.gdshader
@@ -1,14 +1,17 @@
 shader_type spatial;
 render_mode cull_disabled, depth_draw_always;
 
-uniform vec4 wave1 = vec4(0.5,0.5,0.5,1.0);
+uniform vec3 wave1 = vec3(0.5,0.5,0.5);
 uniform vec2 wave1_dir = vec2(1.0,0.0);
+uniform float wave1_t = 0.0;
 
-uniform vec4 wave2 = vec4(0.5,0.5,0.5,1.0);
+uniform vec3 wave2 = vec3(0.5,0.5,0.5);
 uniform vec2 wave2_dir = vec2(1.0,0.0);
+uniform float wave2_t = 0.0;
 
-uniform vec4 wave3 = vec4(0.5,0.5,0.5,1.0);
+uniform vec3 wave3 = vec3(0.5,0.5,0.5);
 uniform vec2 wave3_dir = vec2(1.0,0.0);
+uniform float wave3_t = 0.0;
 
 uniform vec4 water_colour: hint_color;
 uniform vec4 deep_water_colour : hint_color;
@@ -20,12 +23,11 @@ uniform float refraction_amount = 0.01;
 
 varying float vertex_y;
 
-vec3 gerstner_wave(vec4 wave, vec2 wave_dir, vec3 pos, inout vec3 tangent, inout vec3 binormal)
+vec3 gerstner_wave(vec3 wave, vec2 wave_dir, float t, vec3 pos, inout vec3 tangent, inout vec3 binormal)
 {
     float steepness = wave.x;
     float k = wave.y;
     float a = wave.z;
-    float t = wave.w;
 
     vec2 d = normalize(wave_dir);
     float f = k * (dot(d,pos.xz) - t);
@@ -60,9 +62,9 @@ void vertex()
     vec3 global_vertex = (WORLD_MATRIX * vec4(VERTEX,1.0)).xyz;
     TANGENT = vec3(1.0,0.0,0.0);
     BINORMAL = vec3(0.0,0.0,1.0);
-    VERTEX += gerstner_wave(wave1,wave1_dir,global_vertex,TANGENT,BINORMAL);
-    VERTEX += gerstner_wave(wave2,wave2_dir,global_vertex,TANGENT,BINORMAL);
-    VERTEX += gerstner_wave(wave3,wave3_dir,global_vertex,TANGENT,BINORMAL);
+    VERTEX += gerstner_wave(wave1,wave1_dir,wave1_t,global_vertex,TANGENT,BINORMAL);
+    VERTEX += gerstner_wave(wave2,wave2_dir,wave2_t,global_vertex,TANGENT,BINORMAL);
+    VERTEX += gerstner_wave(wave3,wave3_dir,wave3_t,global_vertex,TANGENT,BINORMAL);
     vertex_y = VERTEX.y;
     NORMAL = normalize(cross(BINORMAL,TANGENT));
 }