SL-18293, SL-18190 -- Fix for debug displays not showing up (wireframe still busted). WIP on reflection probe/PBR driven water shader.

1 files changed, 237 insertions, 0 deletions

diff --git a/indra/newview/app_settings/shaders/class2/environment/waterF.glsl b/indra/newview/app_settings/shaders/class2/environment/waterF.glsl
new file mode 100644
index 0000000000..2e7efa9b2a
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class2/environment/waterF.glsl
@@ -0,0 +1,237 @@
+/** 
+ * @file waterF.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+ 
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+vec3 scaleSoftClipFragLinear(vec3 l);
+vec3 atmosFragLightingLinear(vec3 light, vec3 additive, vec3 atten);
+void calcAtmosphericVarsLinear(vec3 inPositionEye, vec3 norm, vec3 light_dir, out vec3 sunlit, out vec3 amblit, out vec3 atten, out vec3 additive);
+
+// PBR interface
+vec3 pbrIbl(vec3 diffuseColor,
+    vec3 specularColor,
+    vec3 radiance, // radiance map sample
+    vec3 irradiance, // irradiance map sample
+    float ao,       // ambient occlusion factor
+    float nv,       // normal dot view vector
+    float perceptualRoughness);
+
+vec3 pbrPunctual(vec3 diffuseColor, vec3 specularColor,
+    float perceptualRoughness,
+    float metallic,
+    vec3 n, // normal
+    vec3 v, // surface point to camera
+    vec3 l); //surface point to light
+
+uniform sampler2D bumpMap;
+uniform sampler2D bumpMap2;
+uniform float     blend_factor;
+uniform sampler2D screenTex;
+uniform sampler2D refTex;
+
+uniform float sunAngle;
+uniform float sunAngle2;
+uniform vec3 lightDir;
+uniform vec3 specular;
+uniform float lightExp;
+uniform float refScale;
+uniform float kd;
+uniform vec2 screenRes;
+uniform vec3 normScale;
+uniform float fresnelScale;
+uniform float fresnelOffset;
+uniform float blurMultiplier;
+uniform vec4 waterFogColor;
+
+
+//bigWave is (refCoord.w, view.w);
+VARYING vec4 refCoord;
+VARYING vec4 littleWave;
+VARYING vec4 view;
+in vec3 vary_position;
+in vec3 vary_normal;
+in vec3 vary_tangent;
+in vec3 vary_light_dir;
+
+vec3 BlendNormal(vec3 bump1, vec3 bump2)
+{
+    vec3 n = mix(bump1, bump2, blend_factor);
+    return n;
+}
+
+vec3 srgb_to_linear(vec3 col);
+
+void sampleReflectionProbesLegacy(inout vec3 ambenv, inout vec3 glossenv, inout vec3 legacyenv,
+    vec3 pos, vec3 norm, float glossiness, float envIntensity);
+
+vec3 vN, vT, vB;
+
+vec3 transform_normal(vec3 vNt)
+{
+    return normalize(vNt.x * vT + vNt.y * vB + vNt.z * vN);
+}
+
+void sampleReflectionProbes(inout vec3 ambenv, inout vec3 glossenv,
+    vec3 pos, vec3 norm, float glossiness);
+
+void main() 
+{
+	vec4 color;
+
+    vN = vary_normal;
+    vT = vary_tangent;
+    vB = cross(vN, vT);
+
+    vec3 pos = vary_position.xyz;
+
+	float dist = length(view.xy);
+	
+	//normalize view vector
+	vec3 viewVec = normalize(pos.xyz);
+	
+	//get wave normals
+    vec2 bigwave = vec2(refCoord.w, view.w);
+    vec3 wave1_a = texture2D(bumpMap, bigwave      ).xyz*2.0-1.0;
+    vec3 wave2_a = texture2D(bumpMap, littleWave.xy).xyz*2.0-1.0;
+    vec3 wave3_a = texture2D(bumpMap, littleWave.zw).xyz*2.0-1.0;
+
+
+    vec3 wave1_b = texture2D(bumpMap2, bigwave      ).xyz*2.0-1.0;
+    vec3 wave2_b = texture2D(bumpMap2, littleWave.xy).xyz*2.0-1.0;
+    vec3 wave3_b = texture2D(bumpMap2, littleWave.zw).xyz*2.0-1.0;
+
+    vec3 wave1 = BlendNormal(wave1_a, wave1_b);
+    vec3 wave2 = BlendNormal(wave2_a, wave2_b);
+    vec3 wave3 = BlendNormal(wave3_a, wave3_b);
+
+    wave1 = transform_normal(wave1);
+    wave2 = transform_normal(wave2);
+    wave3 = transform_normal(wave3);
+
+    vec3 wavef = (wave1 + wave2 * 0.4 + wave3 * 0.6) * 0.5;
+
+    wavef.z *= max(-viewVec.z, 0.1);
+
+    wavef = normalize(wavef);
+
+	//get base fresnel components	
+	
+	/*vec3 df = vec3(
+					dot(viewVec, wave1),
+					dot(viewVec, (wave2 + wave3) * 0.5),
+					dot(viewVec, wave3)
+				 ) * fresnelScale + fresnelOffset;*/
+		    
+	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);
+	
+    //float df1 = df.x + df.y + df.z;
+
+    vec4 refcol = vec4(0, 0, 0, 0);
+
+	//get specular component
+	float spec = clamp(dot(vary_light_dir, (reflect(viewVec,wavef))),0.0,1.0);
+		
+	//harden specular
+	spec = pow(spec, 128.0);
+
+	//figure out distortion vector (ripply)   
+	//vec2 distort2 = distort+wavef.xy*refScale/max(dmod*df1, 1.0);
+		
+	//vec4 fb = texture2D(screenTex, distort2);
+
+    vec3 sunlit;
+    vec3 amblit;
+    vec3 additive;
+    vec3 atten;
+
+    calcAtmosphericVarsLinear(pos.xyz, wavef, lightDir, sunlit, amblit, additive, atten);
+    
+    vec3 v = -viewVec;
+    float NdotV = clamp(abs(dot(wavef.xyz, v)), 0.001, 1.0);
+
+    float metallic = fresnelOffset * 0.1; // fudge -- use fresnelOffset as metalness
+    float roughness = 0.08;
+    float gloss = 1.0 - roughness;
+
+    vec3 baseColor = vec3(0);
+    vec3 f0 = vec3(0.04);
+    vec3 diffuseColor = baseColor.rgb * (vec3(1.0) - f0);
+    diffuseColor *= gloss;
+
+    vec3 specularColor = mix(f0, baseColor.rgb, metallic);
+
+    
+    vec3 refnorm = normalize(wavef + vary_normal);
+
+    vec3 irradiance = vec3(0);
+    vec3 radiance = vec3(0);
+    sampleReflectionProbes(irradiance, radiance, pos, refnorm, gloss);
+    
+    // fudge -- use refracted color as irradiance
+    irradiance = srgb_to_linear(waterFogColor.rgb);
+
+    color.rgb = pbrIbl(diffuseColor, specularColor, radiance, irradiance, gloss, NdotV, 0.0);
+
+    //vec4 fb = waterFogColor;
+    //fb.rgb = srgb_to_linear(fb.rgb);
+	
+    //refcol.rgb = vec3(0, 1, 0);
+
+	//mix with reflection
+	//color.rgb = mix(fb.rgb, refcol.rgb, df1);
+	
+    //color.rgb += spec * specular;
+
+    // fudge -- for punctual lighting, pretend water is metallic
+    diffuseColor = vec3(0);
+    specularColor = vec3(1);
+    roughness = 0.1;
+    color.rgb += pbrPunctual(diffuseColor, specularColor, roughness, metallic, wavef, v, vary_light_dir);
+	color.rgb = atmosFragLightingLinear(color.rgb, additive, atten);
+	color.rgb = scaleSoftClipFragLinear(color.rgb);
+
+    color.a = 0.f;
+
+	//color.a = spec * sunAngle2;
+
+    frag_color = color;
+
+#if defined(WATER_EDGE)
+    gl_FragDepth = 0.9999847f;
+#endif
+	
+}
+