diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class3/environment/waterF.glsl')
| -rw-r--r-- | indra/newview/app_settings/shaders/class3/environment/waterF.glsl | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class3/environment/waterF.glsl b/indra/newview/app_settings/shaders/class3/environment/waterF.glsl new file mode 100644 index 0000000000..8fee259933 --- /dev/null +++ b/indra/newview/app_settings/shaders/class3/environment/waterF.glsl @@ -0,0 +1,291 @@ +/** + * @file waterF.glsl + * + * $LicenseInfo:firstyear=2022&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2022, 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 + * $/LicenseInfo$ + */ + +// class3/environment/waterF.glsl + +out vec4 frag_color; + +#ifdef HAS_SUN_SHADOW +float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen); +#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); +vec4 applyWaterFogViewLinear(vec3 pos, vec4 color, vec3 sunlit); + +// PBR interface +vec2 BRDF(float NoV, float roughness); + +void calcDiffuseSpecular(vec3 baseColor, float metallic, inout vec3 diffuseColor, inout vec3 specularColor); + +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 + +vec3 pbrBaseLight(vec3 diffuseColor, + vec3 specularColor, + float metallic, + vec3 pos, + vec3 norm, + float perceptualRoughness, + vec3 light_dir, + vec3 sunlit, + float scol, + vec3 radiance, + vec3 irradiance, + vec3 colorEmissive, + float ao, + vec3 additive, + vec3 atten); + +uniform sampler2D bumpMap; +uniform sampler2D bumpMap2; +uniform float blend_factor; +#ifdef TRANSPARENT_WATER +uniform sampler2D screenTex; +uniform sampler2D screenDepth; +#endif + +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; +uniform vec3 waterFogColorLinear; + + +//bigWave is (refCoord.w, view.w); +in vec4 refCoord; +in vec4 littleWave; +in 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); +vec3 linear_to_srgb(vec3 col); + +vec3 vN, vT, vB; + +vec3 transform_normal(vec3 vNt) +{ + return normalize(vNt.x * vT + vNt.y * vB + vNt.z * vN); +} + +void sampleReflectionProbesWater(inout vec3 ambenv, inout vec3 glossenv, + vec2 tc, vec3 pos, vec3 norm, float glossiness); + +vec3 getPositionWithNDC(vec3 ndc); + +void main() +{ + vN = vary_normal; + vT = vary_tangent; + vB = cross(vN, vT); + + vec3 pos = vary_position.xyz; + + float dist = length(pos.xyz); + + //normalize view vector + vec3 viewVec = normalize(pos.xyz); + + //get wave normals + vec2 bigwave = vec2(refCoord.w, view.w); + vec3 wave1_a = texture(bumpMap, bigwave, -2 ).xyz*2.0-1.0; + vec3 wave2_a = texture(bumpMap, littleWave.xy).xyz*2.0-1.0; + vec3 wave3_a = texture(bumpMap, littleWave.zw).xyz*2.0-1.0; + + vec3 wave1_b = texture(bumpMap2, bigwave ).xyz*2.0-1.0; + vec3 wave2_b = texture(bumpMap2, littleWave.xy).xyz*2.0-1.0; + vec3 wave3_b = texture(bumpMap2, littleWave.zw).xyz*2.0-1.0; + + //wave1_a = wave2_a = wave3_a = wave1_b = wave2_b = wave3_b = vec3(0,0,1); + + vec3 wave1 = BlendNormal(wave1_a, wave1_b); + vec3 wave2 = BlendNormal(wave2_a, wave2_b); + vec3 wave3 = BlendNormal(wave3_a, wave3_b); + + vec2 distort = (refCoord.xy/refCoord.z) * 0.5 + 0.5; + + //wave1 = transform_normal(wave1); + //wave2 = transform_normal(wave2); + //wave3 = transform_normal(wave3); + + vec3 wavef = (wave1 + wave2 * 0.4 + wave3 * 0.6) * 0.5; + + vec3 waver = wavef*3; + + vec3 up = transform_normal(vec3(0,0,1)); + float vdu = -dot(viewVec, up)*2; + + vec3 wave_ibl = wavef; + wave_ibl.z *= 2.0; + wave_ibl = transform_normal(normalize(wave_ibl)); + + vec3 norm = transform_normal(normalize(wavef)); + + vdu = clamp(vdu, 0, 1); + wavef.z *= max(vdu*vdu*vdu, 0.1); + + wavef = normalize(wavef); + + //wavef = vec3(0, 0, 1); + wavef = transform_normal(wavef); + + float dist2 = dist; + dist = max(dist, 5.0); + + float dmod = sqrt(dist); + + //figure out distortion vector (ripply) + vec2 distort2 = distort + waver.xy * refScale / max(dmod, 1.0); + + distort2 = clamp(distort2, vec2(0), vec2(0.999)); + + vec3 sunlit; + vec3 amblit; + vec3 additive; + vec3 atten; + + float shadow = 1.0f; + +#ifdef HAS_SUN_SHADOW + shadow = sampleDirectionalShadow(pos.xyz, norm.xyz, distort); +#endif + + calcAtmosphericVarsLinear(pos.xyz, wavef, vary_light_dir, sunlit, amblit, additive, atten); + + vec3 sunlit_linear = srgb_to_linear(sunlit); + +#ifdef TRANSPARENT_WATER + vec4 fb = texture(screenTex, distort2); + float depth = texture(screenDepth, distort2).r; + vec3 refPos = getPositionWithNDC(vec3(distort2*2.0-vec2(1.0), depth*2.0-1.0)); + + if (refPos.z > pos.z-0.05) + { + //we sampled an above water sample, don't distort + distort2 = distort; + fb = texture(screenTex, distort2); + depth = texture(screenDepth, distort2).r; + refPos = getPositionWithNDC(vec3(distort2 * 2.0 - vec2(1.0), depth * 2.0 - 1.0)); + } + + fb = applyWaterFogViewLinear(refPos, fb, sunlit); +#else + vec4 fb = applyWaterFogViewLinear(viewVec*2048.0, vec4(1.0), sunlit_linear); +#endif + + // fudge sample on other side of water to be a tad darker + fb.rgb *= 0.75; + + float metallic = 0.0; + float perceptualRoughness = 0.05; + float gloss = 1.0 - perceptualRoughness; + + vec3 irradiance = vec3(0); + vec3 radiance = vec3(0); + sampleReflectionProbesWater(irradiance, radiance, distort2, pos.xyz, wave_ibl.xyz, gloss); + + irradiance = vec3(0); + + vec3 diffuseColor = vec3(0); + vec3 specularColor = vec3(0); + calcDiffuseSpecular(vec3(1), metallic, diffuseColor, specularColor); + + vec3 v = -normalize(pos.xyz); + + vec3 colorEmissive = vec3(0); + float ao = 1.0; + vec3 light_dir = transform_normal(lightDir); + + perceptualRoughness = 0.0; + metallic = 1.0; + + float NdotV = clamp(abs(dot(norm, v)), 0.001, 1.0); + + vec3 punctual = pbrPunctual(vec3(0), specularColor, 0.1, metallic, normalize(wavef+up*max(dist, 32.0)/32.0*(1.0-vdu)), v, normalize(light_dir)); + + vec3 color = punctual * sunlit_linear * 2.75 * shadow; + + vec3 ibl = pbrIbl(vec3(0), vec3(1), radiance, vec3(0), ao, NdotV, 0.0); + + color += ibl; + + float nv = clamp(abs(dot(norm.xyz, v)), 0.001, 1.0); + vec2 brdf = BRDF(clamp(nv, 0, 1), 1.0); + float f = 1.0-brdf.y; //1.0 - (brdf.x+brdf.y); + f *= 0.9; + f *= f; + + // incoming scale is [0, 1] with 0.5 being default + // shift to 0.5 to 1.5 + f *= (fresnelScale - 0.5)+1.0; + + // incoming offset is [0, 1] with 0.5 being default + // shift from -1 to 1 + f += (fresnelOffset - 0.5) * 2.0; + + f = clamp(f, 0, 1); + + color = mix(color, fb.rgb, f); + + color = atmosFragLightingLinear(color, additive, atten); + + float spec = min(max(max(punctual.r, punctual.g), punctual.b), 0.05); + + frag_color = max(vec4(color, spec), vec4(0)); +} + |