Pull and merge from https://bitbucket.org/lindenlab/viewer-development.

7 files changed, 288 insertions, 109 deletions

diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
index c61d5a2a08..18f6d91804 100644
--- a/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainF.glsl
@@ -1,4 +1,4 @@
-/** 
+/**
  * @file terrainF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
@@ -23,19 +23,42 @@
  * $/LicenseInfo$
  */
  
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 gl_FragColor;
+#endif
 
+VARYING vec4 vertex_color;
+VARYING vec4 vary_texcoord0;
+VARYING vec4 vary_texcoord1;
 
-uniform sampler2D detail0;
-uniform sampler2D detail1;
-uniform sampler2D alphaRamp;
+uniform sampler2D detail_0;
+uniform sampler2D detail_1;
+uniform sampler2D detail_2;
+uniform sampler2D detail_3;
+uniform sampler2D alpha_ramp;
 
-void main() 
+vec3 atmosLighting(vec3 light);
+
+vec3 scaleSoftClip(vec3 color);
+
+void main()
 {
-	float a = texture2D(alphaRamp, gl_TexCoord[1].xy).a;
-	vec3 color = mix(texture2D(detail1, gl_TexCoord[2].xy).rgb,
-					 texture2D(detail0, gl_TexCoord[0].xy).rgb,
-					 a);
+	/// Note: This should duplicate the blending functionality currently used for the terrain rendering.
+	
+	/// TODO Confirm tex coords and bind them appropriately in vert shader.
+	vec4 color0 = texture2D(detail_0, vary_texcoord0.xy);
+	vec4 color1 = texture2D(detail_1, vary_texcoord0.xy);
+	vec4 color2 = texture2D(detail_2, vary_texcoord0.xy);
+	vec4 color3 = texture2D(detail_3, vary_texcoord0.xy);
 
-	gl_FragColor.rgb = color;
-	gl_FragColor.a = texture2D(alphaRamp, gl_TexCoord[3].xy).a;
+	float alpha1 = texture2D(alpha_ramp, vary_texcoord0.zw).a;
+	float alpha2 = texture2D(alpha_ramp,vary_texcoord1.xy).a;
+	float alphaFinal = texture2D(alpha_ramp, vary_texcoord1.zw).a;
+	vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
+	
+	/// Add WL Components
+	outColor.rgb = atmosLighting(outColor.rgb * vertex_color.rgb);
+	
+	gl_FragColor = vec4(scaleSoftClip(outColor.rgb), 1.0);
 }
+
diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl
index 917891c063..d09c5f9247 100644
--- a/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainV.glsl
@@ -1,4 +1,4 @@
-/** 
+/**
  * @file terrainV.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
@@ -22,8 +22,25 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
 
+uniform mat3 normal_matrix;
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_matrix;
+uniform mat4 modelview_projection_matrix;
+
+uniform vec4 object_plane_t;
+uniform vec4 object_plane_s;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec3 normal;
+ATTRIBUTE vec2 texcoord0;
+ATTRIBUTE vec2 texcoord1;
+
+VARYING vec4 vertex_color;
+VARYING vec4 vary_texcoord0;
+VARYING vec4 vary_texcoord1;
+
+void calcAtmospherics(vec3 inPositionEye);
 
 vec4 calcLighting(vec3 pos, vec3 norm, vec4 color, vec4 baseCol);
 
@@ -44,17 +61,27 @@ vec4 texgen_object(vec4  vpos, vec4 tc, mat4 mat, vec4 tp0, vec4 tp1)
 void main()
 {
 	//transform vertex
-	gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
-			
-	vec4 pos = gl_ModelViewMatrix * gl_Vertex;
-	vec3 norm = normalize(gl_NormalMatrix * gl_Normal);
+	gl_Position = modelview_projection_matrix * vec4(position.xyz, 1.0);
+
+	vec4 pos = modelview_matrix * vec4(position.xyz, 1.0);
+	vec3 norm = normalize(normal_matrix * normal);
+
+	calcAtmospherics(pos.xyz);
+
+	/// Potentially better without it for water.
+	pos /= pos.w;
+
+	vec4 color = calcLighting(pos.xyz, norm, vec4(1,1,1,1), vec4(0));
 	
-	vec4 color = calcLighting(pos.xyz, norm, vec4(1,1,1,1), gl_Color);
+	vertex_color = color;
+
+	// Transform and pass tex coords
+ 	vary_texcoord0.xy = texgen_object(vec4(position.xyz, 1.0), vec4(texcoord0,0,1), texture_matrix0, object_plane_s, object_plane_t).xy;
 	
-	gl_FrontColor = color;
+	vec4 t = vec4(texcoord1,0,1);
 	
-	gl_TexCoord[0] = texgen_object(gl_Vertex,gl_MultiTexCoord0,gl_TextureMatrix[0],gl_ObjectPlaneS[0],gl_ObjectPlaneT[0]);
-	gl_TexCoord[1] = gl_TextureMatrix[1]*gl_MultiTexCoord1;
-	gl_TexCoord[2] = texgen_object(gl_Vertex,gl_MultiTexCoord2,gl_TextureMatrix[2],gl_ObjectPlaneS[2],gl_ObjectPlaneT[2]);
-	gl_TexCoord[3] = gl_TextureMatrix[3]*gl_MultiTexCoord3;
+	vary_texcoord0.zw = t.xy;
+	vary_texcoord1.xy = t.xy-vec2(2.0, 0.0);
+	vary_texcoord1.zw = t.xy-vec2(1.0, 0.0);
 }
+
diff --git a/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl b/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl
index 711b42b95e..e5c7ced52c 100644
--- a/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/terrainWaterF.glsl
@@ -1,4 +1,4 @@
-/** 
+/**
  * @file terrainWaterF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
@@ -22,22 +22,44 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
 
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 gl_FragColor;
+#endif
 
-// this class1 shader is just a copy of terrainF
+VARYING vec4 vertex_color;
+VARYING vec4 vary_texcoord0;
+VARYING vec4 vary_texcoord1;
 
-uniform sampler2D detail0;
-uniform sampler2D detail1;
-uniform sampler2D alphaRamp;
+uniform sampler2D detail_0;
+uniform sampler2D detail_1;
+uniform sampler2D detail_2;
+uniform sampler2D detail_3;
+uniform sampler2D alpha_ramp;
 
-void main() 
+vec3 atmosLighting(vec3 light);
+
+vec4 applyWaterFog(vec4 color);
+
+void main()
 {
-	float a = texture2D(alphaRamp, gl_TexCoord[1].xy).a;
-	vec3 color = mix(texture2D(detail1, gl_TexCoord[2].xy).rgb,
-					 texture2D(detail0, gl_TexCoord[0].xy).rgb,
-					 a);
+	/// Note: This should duplicate the blending functionality currently used for the terrain rendering.
+	
+	/// TODO Confirm tex coords and bind them appropriately in vert shader.
+	vec4 color0 = texture2D(detail_0, vary_texcoord0.xy);
+	vec4 color1 = texture2D(detail_1, vary_texcoord0.xy);
+	vec4 color2 = texture2D(detail_2, vary_texcoord0.xy);
+	vec4 color3 = texture2D(detail_3, vary_texcoord0.xy);
 
-	gl_FragColor.rgb = color;
-	gl_FragColor.a = texture2D(alphaRamp, gl_TexCoord[3].xy).a;
+	float alpha1 = texture2D(alpha_ramp, vary_texcoord0.zw).a;
+	float alpha2 = texture2D(alpha_ramp,vary_texcoord1.xy).a;
+	float alphaFinal = texture2D(alpha_ramp, vary_texcoord1.zw).a;
+	vec4 outColor = mix( mix(color3, color2, alpha2), mix(color1, color0, alpha1), alphaFinal );
+	
+	/// Add WL Components
+	outColor.rgb = atmosLighting(outColor.rgb * vertex_color.rgb);
+	
+	outColor = applyWaterFog(outColor);
+	gl_FragColor = outColor;
 }
+
diff --git a/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl b/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl
index 72e8e739b3..1fdb90f792 100644
--- a/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/underWaterF.glsl
@@ -23,36 +23,82 @@
  * $/LicenseInfo$
  */
  
-
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 gl_FragColor;
+#endif
 
 uniform sampler2D diffuseMap;
 uniform sampler2D bumpMap;   
 uniform sampler2D screenTex;
+uniform sampler2D refTex;
+uniform sampler2D screenDepth;
 
+uniform vec4 fogCol;
+uniform vec3 lightDir;
+uniform vec3 specular;
+uniform float lightExp;
+uniform vec2 fbScale;
 uniform float refScale;
+uniform float znear;
+uniform float zfar;
+uniform float kd;
+uniform vec4 waterPlane;
+uniform vec3 eyeVec;
 uniform vec4 waterFogColor;
+uniform float waterFogDensity;
+uniform float waterFogKS;
+uniform vec2 screenRes;
 
 //bigWave is (refCoord.w, view.w);
-varying vec4 refCoord;
-varying vec4 littleWave;
-varying vec4 view;
+VARYING vec4 refCoord;
+VARYING vec4 littleWave;
+VARYING vec4 view;
 
-void main() 
+vec4 applyWaterFog(vec4 color, vec3 viewVec)
 {
-	vec4 color;    
+	//normalize view vector
+	vec3 view = normalize(viewVec);
+	float es = -view.z;
+
+	//find intersection point with water plane and eye vector
 	
-	//get bigwave normal
-	vec3 wavef = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0;
-    
-	//get detail normals
-	vec3 dcol = texture2D(bumpMap, littleWave.xy).rgb*0.75;
-	dcol += texture2D(bumpMap, littleWave.zw).rgb*1.25;
-	    
-	//interpolate between big waves and little waves (big waves in deep water)
-	wavef = (wavef+dcol)*0.5;
+	//get eye depth
+	float e0 = max(-waterPlane.w, 0.0);
+	
+	//get object depth
+	float depth = length(viewVec);
+		
+	//get "thickness" of water
+	float l = max(depth, 0.1);
 
-	//crunch normal to range [-1,1]
-	wavef -= vec3(1,1,1);
+	float kd = waterFogDensity;
+	float ks = waterFogKS;
+	vec4 kc = waterFogColor;
+	
+	float F = 0.98;
+	
+	float t1 = -kd * pow(F, ks * e0);
+	float t2 = kd + ks * es;
+	float t3 = pow(F, t2*l) - 1.0;
+	
+	float L = min(t1/t2*t3, 1.0);
+	
+	float D = pow(0.98, l*kd);
+	//return vec4(1.0, 0.0, 1.0, 1.0);
+	return color * D + kc * L;
+	//depth /= 10.0;
+	//return vec4(depth,depth,depth,0.0);
+}
+
+void main() 
+{
+	vec4 color;
+	    
+	//get detail normals
+	vec3 wave1 = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0-1.0;
+	vec3 wave2 = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
+	vec3 wave3 = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;    
+	vec3 wavef = normalize(wave1+wave2+wave3);
 	
 	//figure out distortion vector (ripply)   
 	vec2 distort = (refCoord.xy/refCoord.z) * 0.5 + 0.5;
@@ -60,6 +106,5 @@ void main()
 		
 	vec4 fb = texture2D(screenTex, distort);
 	
-	gl_FragColor.rgb = mix(waterFogColor.rgb, fb.rgb, waterFogColor.a * 0.001 + 0.999);
-	gl_FragColor.a = fb.a;
+	gl_FragColor = applyWaterFog(fb,view.xyz);
 }
diff --git a/indra/newview/app_settings/shaders/class1/environment/waterF.glsl b/indra/newview/app_settings/shaders/class1/environment/waterF.glsl
index 4d555b566a..444c896d38 100644
--- a/indra/newview/app_settings/shaders/class1/environment/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/waterF.glsl
@@ -23,20 +23,19 @@
  * $/LicenseInfo$
  */
  
-
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 gl_FragColor;
+#endif
 
 vec3 scaleSoftClip(vec3 inColor);
 vec3 atmosTransport(vec3 inColor);
-vec3 applyWaterFog(vec4 inColor);
 
-uniform sampler2D diffuseMap;
 uniform sampler2D bumpMap;   
 uniform sampler2D screenTex;
 uniform sampler2D refTex;
 
 uniform float sunAngle;
 uniform float sunAngle2;
-uniform float scaledAngle;
 uniform vec3 lightDir;
 uniform vec3 specular;
 uniform float lightExp;
@@ -47,67 +46,92 @@ uniform vec3 normScale;
 uniform float fresnelScale;
 uniform float fresnelOffset;
 uniform float blurMultiplier;
-uniform vec4 fogCol;
+
 
 //bigWave is (refCoord.w, view.w);
-varying vec4 refCoord;
-varying vec4 littleWave;
-varying vec4 view;
+VARYING vec4 refCoord;
+VARYING vec4 littleWave;
+VARYING vec4 view;
 
 void main() 
 {
-	vec3 viewVec = view.xyz;
 	vec4 color;
 	
-	float dist = length(viewVec.xy);
+	float dist = length(view.xy);
 	
 	//normalize view vector
-	viewVec = normalize(viewVec);
+	vec3 viewVec = normalize(view.xyz);
 	
 	//get wave normals
-	vec3 wavef = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0;
-
-	//get detail normals
-	vec3 dcol = texture2D(bumpMap, littleWave.xy).rgb*0.75;
-	dcol += texture2D(bumpMap, littleWave.zw).rgb*1.25;
-
-	//interpolate between big waves and little waves (big waves in deep water)
-	wavef = (wavef + dcol) * 0.5;
-	
-	//crunch normal to range [-1,1]
-	wavef -= vec3(1,1,1);
-	wavef = normalize(wavef);
-   
+	vec3 wave1 = texture2D(bumpMap, vec2(refCoord.w, view.w)).xyz*2.0-1.0;
+	vec3 wave2 = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
+	vec3 wave3 = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;
 	//get base fresnel components	
 	
-	float df = dot(viewVec,wavef) * fresnelScale + fresnelOffset;
+	vec3 df = vec3(
+					dot(viewVec, wave1),
+					dot(viewVec, (wave2 + wave3) * 0.5),
+					dot(viewVec, wave3)
+				 ) * fresnelScale + fresnelOffset;
+	df *= df;
 		    
 	vec2 distort = (refCoord.xy/refCoord.z) * 0.5 + 0.5;
 	
 	float dist2 = dist;
 	dist = max(dist, 5.0);
 	
+	float dmod = sqrt(dist);
+	
+	vec2 dmod_scale = vec2(dmod*dmod, dmod);
+	
 	//get reflected color
-	vec2 refdistort = wavef.xy*dot(normScale, vec3(0.333));
-	vec2 refvec = distort+refdistort/dist;
-	vec4 refcol = texture2D(refTex, refvec);
+	vec2 refdistort1 = wave1.xy*normScale.x;
+	vec2 refvec1 = distort+refdistort1/dmod_scale;
+	vec4 refcol1 = texture2D(refTex, refvec1);
+	
+	vec2 refdistort2 = wave2.xy*normScale.y;
+	vec2 refvec2 = distort+refdistort2/dmod_scale;
+	vec4 refcol2 = texture2D(refTex, refvec2);
+	
+	vec2 refdistort3 = wave3.xy*normScale.z;
+	vec2 refvec3 = distort+refdistort3/dmod_scale;
+	vec4 refcol3 = texture2D(refTex, refvec3);
+
+	vec4 refcol = refcol1 + refcol2 + refcol3;
+	float df1 = df.x + df.y + df.z;
+	refcol *= df1 * 0.333;
+	
+	vec3 wavef = (wave1 + wave2 * 0.4 + wave3 * 0.6) * 0.5;
+	
+	wavef.z *= max(-viewVec.z, 0.1);
+	wavef = normalize(wavef);
+	
+	float df2 = dot(viewVec, wavef) * fresnelScale+fresnelOffset;
+	
+	vec2 refdistort4 = wavef.xy*0.125;
+	refdistort4.y -= abs(refdistort4.y);
+	vec2 refvec4 = distort+refdistort4/dmod;
+	float dweight = min(dist2*blurMultiplier, 1.0);
+	vec4 baseCol = texture2D(refTex, refvec4);
+	refcol = mix(baseCol*df2, refcol, dweight);
 
 	//get specular component
 	float spec = clamp(dot(lightDir, (reflect(viewVec,wavef))),0.0,1.0);
-	
+		
 	//harden specular
-	spec = pow(spec, lightExp);
+	spec = pow(spec, 128.0);
 
 	//figure out distortion vector (ripply)   
-	vec2 distort2 = distort+wavef.xy*refScale/max(dist*df, 1.0);
+	vec2 distort2 = distort+wavef.xy*refScale/max(dmod*df1, 1.0);
 		
 	vec4 fb = texture2D(screenTex, distort2);
 	
 	//mix with reflection
-	color.rgb = mix(mix(fogCol.rgb, fb.rgb, fogCol.a), refcol.rgb, df);
+	// Note we actually want to use just df1, but multiplying by 0.999999 gets around and nvidia compiler bug
+	color.rgb = mix(fb.rgb, refcol.rgb, df1 * 0.99999);
 	color.rgb += spec * specular;
 	
-	//color.rgb = applyWaterFog(color);//atmosTransport(color.rgb);
+	color.rgb = atmosTransport(color.rgb);
 	color.rgb = scaleSoftClip(color.rgb);
 	color.a = spec * sunAngle2;
 
diff --git a/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl b/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl
index d44690d1fb..4bdfce9260 100644
--- a/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/waterFogF.glsl
@@ -25,16 +25,50 @@
  
 
 
+uniform vec4 lightnorm;
+uniform vec4 waterPlane;
+uniform vec4 waterFogColor;
+uniform float waterFogDensity;
+uniform float waterFogKS;
+
+vec3 getPositionEye();
+
 vec4 applyWaterFog(vec4 color)
 {
-	// GL_EXP2 Fog
-	//float fog = exp(-gl_Fog.density * gl_Fog.density * gl_FogFragCoord * gl_FogFragCoord);
-	// GL_EXP Fog
-	// float fog = exp(-gl_Fog.density * gl_FogFragCoord);
-	// GL_LINEAR Fog
-	float fog = (gl_Fog.end - gl_FogFragCoord) * gl_Fog.scale;
-	fog = clamp(fog, 0.0, 1.0);
-	color.rgb = mix(gl_Fog.color.rgb, color.rgb, fog);
+	//normalize view vector
+	vec3 view = normalize(getPositionEye());
+	float es = -(dot(view, waterPlane.xyz));
+
+	//find intersection point with water plane and eye vector
+	
+	//get eye depth
+	float e0 = max(-waterPlane.w, 0.0);
+	
+	vec3 int_v = waterPlane.w > 0.0 ? view * waterPlane.w/es : vec3(0.0, 0.0, 0.0);
+	
+	//get object depth
+	float depth = length(getPositionEye() - int_v);
+		
+	//get "thickness" of water
+	float l = max(depth, 0.1);
+
+	float kd = waterFogDensity;
+	float ks = waterFogKS;
+	vec4 kc = waterFogColor;
+	
+	float F = 0.98;
+	
+	float t1 = -kd * pow(F, ks * e0);
+	float t2 = kd + ks * es;
+	float t3 = pow(F, t2*l) - 1.0;
+	
+	float L = min(t1/t2*t3, 1.0);
+	
+	float D = pow(0.98, l*kd);
+	
+	color.rgb = color.rgb * D + kc.rgb * L;
+	color.a = kc.a + color.a;
+	
 	return color;
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/environment/waterV.glsl b/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
index 610c06fbbc..f66ba1d2d9 100644
--- a/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/waterV.glsl
@@ -22,8 +22,11 @@
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
- 
 
+uniform mat4 modelview_matrix;
+uniform mat4 modelview_projection_matrix;
+
+ATTRIBUTE vec3 position;
 
 void calcAtmospherics(vec3 inPositionEye);
 
@@ -33,9 +36,9 @@ uniform float time;
 uniform vec3 eyeVec;
 uniform float waterHeight;
 
-varying vec4 refCoord;
-varying vec4 littleWave;
-varying vec4 view;
+VARYING vec4 refCoord;
+VARYING vec4 littleWave;
+VARYING vec4 view;
 
 float wave(vec2 v, float t, float f, vec2 d, float s) 
 {
@@ -45,8 +48,7 @@ float wave(vec2 v, float t, float f, vec2 d, float s)
 void main()
 {
 	//transform vertex
-	vec4 position = gl_Vertex;
-	mat4 modelViewProj = gl_ModelViewProjectionMatrix;
+	mat4 modelViewProj = modelview_projection_matrix;
 	
 	vec4 oPosition;
 		    
@@ -57,27 +59,29 @@ void main()
 	float d = length(oEyeVec.xy);
 	float ld = min(d, 2560.0);
 	
-	position.xy = eyeVec.xy + oEyeVec.xy/d*ld;
+	vec3 lpos = position;
+	lpos.xy = eyeVec.xy + oEyeVec.xy/d*ld;
 	view.xyz = oEyeVec;
 		
 	d = clamp(ld/1536.0-0.5, 0.0, 1.0);	
 	d *= d;
 		
-	oPosition = position;
+	oPosition = vec4(lpos, 1.0);
 	oPosition.z = mix(oPosition.z, max(eyeVec.z*0.75, 0.0), d);
 	oPosition = modelViewProj * oPosition;
 	refCoord.xyz = oPosition.xyz + vec3(0,0,0.2);
 	
 	//get wave position parameter (create sweeping horizontal waves)
-	vec3 v = position.xyz;
+	vec3 v = lpos;
 	v.x += (cos(v.x*0.08/*+time*0.01*/)+sin(v.y*0.02))*6.0;
 	    
 	//push position for further horizon effect.
-	position.xyz = oEyeVec.xyz*(waterHeight/oEyeVec.z);
-	position.w = 1.0;
-	position = position*gl_ModelViewMatrix;
+	vec4 pos;
+	pos.xyz = oEyeVec.xyz*(waterHeight/oEyeVec.z);
+	pos.w = 1.0;
+	pos = modelview_matrix*pos;
 	
-	calcAtmospherics((gl_ModelViewMatrix * gl_Vertex).xyz);
+	calcAtmospherics(pos.xyz);
 	
 	
 	//pass wave parameters to pixel shader