Restore old shader for quality level below 2

Effects/water.eff

@@ -146,4 +146,53 @@
       </uniform>
     </pass>
   </technique>
+  <technique n="9">
+    <predicate>
+      <and>
+        <property>/sim/rendering/water-shader</property>
+        <property>/sim/rendering/shader-effects</property>
+        <or>
+          <less-equal>
+            <value type="float">2.0</value>
+            <glversion/>
+          </less-equal>
+          <and>
+            <extension-supported>GL_ARB_shader_objects</extension-supported>
+            <extension-supported>GL_ARB_shading_language_100</extension-supported>
+            <extension-supported>GL_ARB_vertex_shader</extension-supported>
+            <extension-supported>GL_ARB_fragment_shader</extension-supported>
+          </and>
+        </or>
+      </and>
+    </predicate>
+    <pass>
+      <lighting>true</lighting>
+      <material>
+        <ambient><use>material/ambient</use></ambient>
+        <diffuse><use>material/diffuse</use></diffuse>
+        <specular><use>material/specular</use></specular>
+        <color-mode>ambient-and-diffuse</color-mode>
+      </material>
+      <blend><use>transparent</use></blend>
+      <alpha-test><use>transparent</use></alpha-test>
+      <shade-model>smooth</shade-model>
+      <cull-face>back</cull-face>
+      <render-bin>
+        <bin-number><use>render-bin/bin-number</use></bin-number>
+        <bin-name><use>render-bin/bin-name</use></bin-name>
+      </render-bin>
+      <texture-unit>
+        <unit>0</unit>
+        <type>noise</type>
+      </texture-unit>
+      <program>
+        <vertex-shader>Shaders/water-orig.vert</vertex-shader>
+        <fragment-shader>Shaders/water-orig.frag</fragment-shader>
+      </program>
+      <uniform>
+      <name>texture</name>
+      <type>sampler-3d</type>
+      <value type="int">0</value></uniform>
+    </pass>
+  </technique>
 </PropertyList>

Shaders/water-orig.frag

@@ -0,0 +1,86 @@
+#version 120
+
+varying vec4 rawpos;
+varying vec4 ecPosition;
+varying vec3 VNormal;
+varying vec3 Normal;
+varying vec3 lightVec;
+
+uniform sampler3D NoiseTex;
+uniform float osg_SimulationTime;
+
+//const float scale = 1.0;
+
+void main (void)
+{
+    vec4 noisevecS   = texture3D(NoiseTex, (rawpos.xyz)*0.0126);
+    vec4 nvLS   = texture3D(NoiseTex, (rawpos.xyz)*-0.0003323417);
+
+    vec4 noisevec   = texture3D(NoiseTex, (rawpos.xyz)*0.00423+vec3(0.0,0.0,osg_SimulationTime*0.035217));
+    vec4 nvL   = texture3D(NoiseTex, (rawpos.xyz)*0.001223417+(0.0,0.0,osg_SimulationTime*-0.0212));
+
+    float fogFactor;
+    if (gl_Fog.density == 1.0)
+    {
+       fogFactor=1.0;
+    }
+    else
+    {
+        float fogCoord = ecPosition.z;
+        const float LOG2 = 1.442695;
+        fogFactor = exp2(-gl_Fog.density * gl_Fog.density * fogCoord * fogCoord * LOG2);
+        fogFactor = clamp(fogFactor, 0.0, 1.0);
+    }
+
+    float a=1.0;
+    float n=0.00;
+    n += nvLS[0]*a;
+    a/=2.0;
+    n += nvLS[1]*a;
+    a/=2.0;
+    n += nvLS[2]*a;
+    a/=2.0;
+    n += nvLS[3]*a;
+
+    a=4.0;
+    float na=n;
+    na += nvL[0]*1.1;
+    a*=1.2;
+    na += nvL[1]*a;
+    a*=1.2;
+    na += nvL[2]*a;
+    a*=1.2;
+    na += nvL[3]*a;
+    a=2.0;
+    na += noisevec[0]*a*0.2;
+    a*=1.2;
+    na += noisevec[1]*a;
+    a*=1.2;
+    na += noisevec[2]*a;
+    a*=1.2;
+    na += noisevec[3]*a;
+
+    vec4 c1;
+    c1 = asin(vec4(smoothstep(0.0, 2.2, n), smoothstep(-0.1, 2.10, n), smoothstep(-0.2, 2.0, n), 1.0));
+
+    vec3 Eye = normalize(-ecPosition.xyz);
+    vec3 Reflected = normalize(reflect(-normalize(lightVec), normalize(VNormal+vec3(0.0,0.0,na*0.10-0.24)))); 
+
+    vec3 bump = normalize(VNormal+vec3(0.0, 0.0, na)-0.9);
+    vec3 bumped = max(normalize(refract(lightVec, normalize(bump), 0.16)), 0.0);
+
+    vec4 ambientColor = gl_LightSource[0].ambient;
+    vec4 light = ambientColor;
+    c1 *= light;
+
+    float bumpFact = (bumped.r+bumped.g+bumped.b);
+    float ReflectedEye = max(dot(Reflected, Eye), 0.0);
+    float eyeFact = pow(ReflectedEye, 20.0);
+    c1 += 0.3 * gl_LightSource[0].diffuse * (1.0-eyeFact) * bumpFact*bumpFact;
+    c1 += 0.4 * gl_LightSource[0].diffuse * eyeFact * 3*bumpFact;
+    eyeFact = pow(eyeFact, 20.0);
+    c1 += gl_LightSource[0].specular * eyeFact * 4*bumpFact;
+
+    vec4 finalColor = c1;
+    gl_FragColor = mix(gl_Fog.color, finalColor, fogFactor);
+}

Shaders/water-orig.vert

@@ -0,0 +1,15 @@
+varying vec4 rawpos;
+varying vec4 ecPosition;
+varying vec3 VNormal;
+varying vec3 Normal;
+varying vec3 lightVec;
+
+void main(void)
+{
+	rawpos     = gl_Vertex;
+	ecPosition = gl_ModelViewMatrix * gl_Vertex;
+	VNormal = normalize(gl_NormalMatrix * gl_Normal);
+	Normal = normalize(gl_Normal);
+	lightVec = normalize(gl_LightSource[0].position.xyz/* - ecPosition*/);
+	gl_Position = ftransform();
+}