From 348d427db6537746c5c8c9a0d1aa021f074afbb5 Mon Sep 17 00:00:00 2001 From: "Jonathan \"Geenz\" Goodman" Date: Tue, 29 Aug 2023 05:08:47 -0700 Subject: Add a probe strength uniform for hero probes. On standard reflection probes this doesn't really do anything. DRTVWR-583 --- indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl | 2 ++ 1 file changed, 2 insertions(+) (limited to 'indra/newview/app_settings/shaders/class1/interface') diff --git a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl index 9ecdf0bf77..cb6f34713c 100644 --- a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl +++ b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl @@ -38,6 +38,7 @@ in vec3 vary_dir; uniform float mipLevel; uniform int u_width; uniform float max_probe_lod; +uniform float probe_strength; // ============================================================================================================= @@ -163,5 +164,6 @@ void main() { vec3 N = normalize(vary_dir); frag_color = max(prefilterEnvMap(N), vec4(0)); + frag_color.a *= probe_strength; } // ============================================================================================================= -- cgit v1.2.3 From 00c65b62707f5c30cf2d48c0bd0c975c3bceb513 Mon Sep 17 00:00:00 2001 From: Cosmic Linden Date: Fri, 15 Sep 2023 14:27:15 -0700 Subject: secondlife/viewer-issues#43: Fix debug normals not rendering for terrain --- .../shaders/class1/interface/normaldebugF.glsl | 33 ++++++++++ .../shaders/class1/interface/normaldebugG.glsl | 76 ++++++++++++++++++++++ .../shaders/class1/interface/normaldebugV.glsl | 74 +++++++++++++++++++++ 3 files changed, 183 insertions(+) create mode 100644 indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl create mode 100644 indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl create mode 100644 indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl (limited to 'indra/newview/app_settings/shaders/class1/interface') diff --git a/indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl b/indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl new file mode 100644 index 0000000000..388042e7e0 --- /dev/null +++ b/indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl @@ -0,0 +1,33 @@ +/** + * @file normaldebugF.glsl + * + * $LicenseInfo:firstyear=2023&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2023, 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 + * $/LicenseInfo$ + */ + +out vec4 frag_color; + +in vec4 vertex_color; + +void main() +{ + frag_color = max(vertex_color, vec4(0)); +} diff --git a/indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl b/indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl new file mode 100644 index 0000000000..ea04ce1cae --- /dev/null +++ b/indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl @@ -0,0 +1,76 @@ +/** + * @file normaldebugG.glsl + * + * $LicenseInfo:firstyear=2023&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2023, 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 + * $/LicenseInfo$ + */ + +// *NOTE: Geometry shaders have a reputation for being slow. Consider using +// compute shaders instead, which have a reputation for being fast. This +// geometry shader in particular seems to run fine on my machine, but I won't +// vouch for this in performance-critical areas. +// -Cosmic,2023-09-28 + +out vec4 vertex_color; + +in vec4 normal_g[]; +#if HAS_ATTRIBUTE_TANGENT == 1 +in vec4 tangent_g[]; +#endif + +layout(TRIANGLES) in; +#if HAS_ATTRIBUTE_TANGENT == 1 +layout(LINE_STRIP, max_vertices = 12) out; +#else +layout(LINE_STRIP, max_vertices = 6) out; +#endif + +void triangle_normal_debug(int i) +{ + // Normal + vec4 normal_color = vec4(1.0, 1.0, 0.0, 1.0); + gl_Position = gl_in[i].gl_Position; + vertex_color = normal_color; + EmitVertex(); + gl_Position = normal_g[i]; + vertex_color = normal_color; + EmitVertex(); + EndPrimitive(); + +#if HAS_ATTRIBUTE_TANGENT == 1 + // Tangent + vec4 tangent_color = vec4(0.0, 1.0, 1.0, 1.0); + gl_Position = gl_in[i].gl_Position; + vertex_color = tangent_color; + EmitVertex(); + gl_Position = tangent_g[i]; + vertex_color = tangent_color; + EmitVertex(); + EndPrimitive(); +#endif +} + +void main() +{ + triangle_normal_debug(0); + triangle_normal_debug(1); + triangle_normal_debug(2); +} diff --git a/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl b/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl new file mode 100644 index 0000000000..d1596b9d2a --- /dev/null +++ b/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl @@ -0,0 +1,74 @@ +/** + * @file normaldebugV.glsl + * + * $LicenseInfo:firstyear=2023&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2023, 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 + * $/LicenseInfo$ + */ + +in vec3 position; +in vec3 normal; +out vec4 normal_g; +#if HAS_ATTRIBUTE_TANGENT == 1 +in vec4 tangent; +out vec4 tangent_g; +#endif + +uniform float debug_normal_draw_length; + +#ifdef HAS_SKIN +mat4 getObjectSkinnedTransform(); +#else +uniform mat3 normal_matrix; +#endif +uniform mat4 projection_matrix; +uniform mat4 modelview_matrix; + +// *NOTE: Should use the modelview_projection_matrix here in the non-skinned +// case for efficiency, but opting for the simplier implementation for now as +// this is debug code. Also, the skinned version hasn't beeen tested yet. +// world_pos = mat * vec4(position.xyz, 1.0) +vec4 get_screen_normal(vec3 position, vec4 world_pos, vec3 normal, mat4 mat) +{ + vec4 world_norm = mat * vec4((position + normal), 1.0); + world_norm.xyz -= world_pos.xyz; + world_norm.xyz = debug_normal_draw_length * normalize(world_norm.xyz); + world_norm.xyz += world_pos.xyz; + return projection_matrix * world_norm; +} + +void main() +{ +#ifdef HAS_SKIN + mat4 mat = getObjectSkinnedTransform(); + mat = modelview_matrix * mat; +#else +#define mat modelview_matrix +#endif + + vec4 world_pos = mat * vec4(position.xyz,1.0); + + gl_Position = projection_matrix * world_pos; + normal_g = get_screen_normal(position.xyz, world_pos, normal.xyz, mat); +#if HAS_ATTRIBUTE_TANGENT == 1 + tangent_g = get_screen_normal(position.xyz, world_pos, tangent.xyz, mat); +#endif +} + -- cgit v1.2.3 From fac63e473a4b2b7b9b361c4d5656c94d47d88ef0 Mon Sep 17 00:00:00 2001 From: "Jonathan \"Geenz\" Goodman" Date: Thu, 1 Feb 2024 12:11:20 -0800 Subject: #684 Fix pixellation on mirrors regardless of mirror resolution. --- indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'indra/newview/app_settings/shaders/class1/interface') diff --git a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl index cb6f34713c..c1ed1bfe6e 100644 --- a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl +++ b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl @@ -130,7 +130,7 @@ vec4 prefilterEnvMap(vec3 R) float totalWeight = 0.0; float envMapDim = float(textureSize(reflectionProbes, 0).s); float roughness = mipLevel/max_probe_lod; - int numSamples = max(int(32*roughness), 1); + int numSamples = max(int(PROBE_FILTER_SAMPLES*roughness), 1); float numMips = max_probe_lod+1; -- cgit v1.2.3 From f1e9d13b9918e44dda635a7085c4ffdd924172bd Mon Sep 17 00:00:00 2001 From: Brad Linden Date: Fri, 23 Feb 2024 14:11:31 -0800 Subject: Fixes for some shader compilation failures on mac. * conditional compilation should use #ifdef * layout keywords need to be lowercase --- .../app_settings/shaders/class1/interface/normaldebugG.glsl | 12 ++++++------ .../app_settings/shaders/class1/interface/normaldebugV.glsl | 4 ++-- 2 files changed, 8 insertions(+), 8 deletions(-) (limited to 'indra/newview/app_settings/shaders/class1/interface') diff --git a/indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl b/indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl index ea04ce1cae..51d05cd507 100644 --- a/indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl +++ b/indra/newview/app_settings/shaders/class1/interface/normaldebugG.glsl @@ -32,15 +32,15 @@ out vec4 vertex_color; in vec4 normal_g[]; -#if HAS_ATTRIBUTE_TANGENT == 1 +#ifdef HAS_ATTRIBUTE_TANGENT in vec4 tangent_g[]; #endif -layout(TRIANGLES) in; -#if HAS_ATTRIBUTE_TANGENT == 1 -layout(LINE_STRIP, max_vertices = 12) out; +layout(triangles) in; +#ifdef HAS_ATTRIBUTE_TANGENT +layout(line_strip, max_vertices = 12) out; #else -layout(LINE_STRIP, max_vertices = 6) out; +layout(line_strip, max_vertices = 6) out; #endif void triangle_normal_debug(int i) @@ -55,7 +55,7 @@ void triangle_normal_debug(int i) EmitVertex(); EndPrimitive(); -#if HAS_ATTRIBUTE_TANGENT == 1 +#ifdef HAS_ATTRIBUTE_TANGENT // Tangent vec4 tangent_color = vec4(0.0, 1.0, 1.0, 1.0); gl_Position = gl_in[i].gl_Position; diff --git a/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl b/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl index d1596b9d2a..b198bc2485 100644 --- a/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl +++ b/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl @@ -26,7 +26,7 @@ in vec3 position; in vec3 normal; out vec4 normal_g; -#if HAS_ATTRIBUTE_TANGENT == 1 +#ifdef HAS_ATTRIBUTE_TANGENT in vec4 tangent; out vec4 tangent_g; #endif @@ -67,7 +67,7 @@ void main() gl_Position = projection_matrix * world_pos; normal_g = get_screen_normal(position.xyz, world_pos, normal.xyz, mat); -#if HAS_ATTRIBUTE_TANGENT == 1 +#ifdef HAS_ATTRIBUTE_TANGENT tangent_g = get_screen_normal(position.xyz, world_pos, tangent.xyz, mat); #endif } -- cgit v1.2.3 From b06a99f7c76950484972e25d9dbbee8660a6a6c3 Mon Sep 17 00:00:00 2001 From: Andrey Lihatskiy Date: Wed, 15 May 2024 12:47:27 +0300 Subject: Post-merge spaces fix --- .../shaders/class1/interface/normaldebugF.glsl | 14 +- .../shaders/class1/interface/normaldebugV.glsl | 16 +-- .../shaders/class1/interface/radianceGenF.glsl | 146 ++++++++++----------- 3 files changed, 88 insertions(+), 88 deletions(-) (limited to 'indra/newview/app_settings/shaders/class1/interface') diff --git a/indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl b/indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl index 388042e7e0..2bfd45f3b0 100644 --- a/indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl +++ b/indra/newview/app_settings/shaders/class1/interface/normaldebugF.glsl @@ -1,24 +1,24 @@ -/** +/** * @file normaldebugF.glsl * * $LicenseInfo:firstyear=2023&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2023, 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 * $/LicenseInfo$ */ @@ -27,7 +27,7 @@ out vec4 frag_color; in vec4 vertex_color; -void main() +void main() { - frag_color = max(vertex_color, vec4(0)); + frag_color = max(vertex_color, vec4(0)); } diff --git a/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl b/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl index b198bc2485..ae726190c7 100644 --- a/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl +++ b/indra/newview/app_settings/shaders/class1/interface/normaldebugV.glsl @@ -1,24 +1,24 @@ -/** +/** * @file normaldebugV.glsl * * $LicenseInfo:firstyear=2023&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2023, 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 * $/LicenseInfo$ */ @@ -65,10 +65,10 @@ void main() vec4 world_pos = mat * vec4(position.xyz,1.0); - gl_Position = projection_matrix * world_pos; - normal_g = get_screen_normal(position.xyz, world_pos, normal.xyz, mat); + gl_Position = projection_matrix * world_pos; + normal_g = get_screen_normal(position.xyz, world_pos, normal.xyz, mat); #ifdef HAS_ATTRIBUTE_TANGENT - tangent_g = get_screen_normal(position.xyz, world_pos, tangent.xyz, mat); + tangent_g = get_screen_normal(position.xyz, world_pos, tangent.xyz, mat); #endif } diff --git a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl index c1ed1bfe6e..feb0947649 100644 --- a/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl +++ b/indra/newview/app_settings/shaders/class1/interface/radianceGenF.glsl @@ -1,28 +1,28 @@ -/** +/** * @file radianceGenF.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 * $/LicenseInfo$ */ - + /*[EXTRA_CODE_HERE]*/ @@ -36,7 +36,7 @@ in vec3 vary_dir; //uniform float roughness; uniform float mipLevel; -uniform int u_width; +uniform int u_width; uniform float max_probe_lod; uniform float probe_strength; @@ -74,96 +74,96 @@ const float PI = 3.1415926536; // Based omn http://byteblacksmith.com/improvements-to-the-canonical-one-liner-glsl-rand-for-opengl-es-2-0/ float random(vec2 co) { - float a = 12.9898; - float b = 78.233; - float c = 43758.5453; - float dt= dot(co.xy ,vec2(a,b)); - float sn= mod(dt,3.14); - return fract(sin(sn) * c); + float a = 12.9898; + float b = 78.233; + float c = 43758.5453; + float dt= dot(co.xy ,vec2(a,b)); + float sn= mod(dt,3.14); + return fract(sin(sn) * c); } -vec2 hammersley2d(uint i, uint N) +vec2 hammersley2d(uint i, uint N) { - // Radical inverse based on http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html - uint bits = (i << 16u) | (i >> 16u); - bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u); - bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u); - bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u); - bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u); - float rdi = float(bits) * 2.3283064365386963e-10; - return vec2(float(i) /float(N), rdi); + // Radical inverse based on http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html + uint bits = (i << 16u) | (i >> 16u); + bits = ((bits & 0x55555555u) << 1u) | ((bits & 0xAAAAAAAAu) >> 1u); + bits = ((bits & 0x33333333u) << 2u) | ((bits & 0xCCCCCCCCu) >> 2u); + bits = ((bits & 0x0F0F0F0Fu) << 4u) | ((bits & 0xF0F0F0F0u) >> 4u); + bits = ((bits & 0x00FF00FFu) << 8u) | ((bits & 0xFF00FF00u) >> 8u); + float rdi = float(bits) * 2.3283064365386963e-10; + return vec2(float(i) /float(N), rdi); } // Based on http://blog.selfshadow.com/publications/s2013-shading-course/karis/s2013_pbs_epic_slides.pdf -vec3 importanceSample_GGX(vec2 Xi, float roughness, vec3 normal) +vec3 importanceSample_GGX(vec2 Xi, float roughness, vec3 normal) { - // Maps a 2D point to a hemisphere with spread based on roughness - float alpha = roughness * roughness; - float phi = 2.0 * PI * Xi.x + random(normal.xz) * 0.1; - float cosTheta = sqrt((1.0 - Xi.y) / (1.0 + (alpha*alpha - 1.0) * Xi.y)); - float sinTheta = sqrt(1.0 - cosTheta * cosTheta); - vec3 H = vec3(sinTheta * cos(phi), sinTheta * sin(phi), cosTheta); - - // Tangent space - vec3 up = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0); - vec3 tangentX = normalize(cross(up, normal)); - vec3 tangentY = normalize(cross(normal, tangentX)); - - // Convert to world Space - return normalize(tangentX * H.x + tangentY * H.y + normal * H.z); + // Maps a 2D point to a hemisphere with spread based on roughness + float alpha = roughness * roughness; + float phi = 2.0 * PI * Xi.x + random(normal.xz) * 0.1; + float cosTheta = sqrt((1.0 - Xi.y) / (1.0 + (alpha*alpha - 1.0) * Xi.y)); + float sinTheta = sqrt(1.0 - cosTheta * cosTheta); + vec3 H = vec3(sinTheta * cos(phi), sinTheta * sin(phi), cosTheta); + + // Tangent space + vec3 up = abs(normal.z) < 0.999 ? vec3(0.0, 0.0, 1.0) : vec3(1.0, 0.0, 0.0); + vec3 tangentX = normalize(cross(up, normal)); + vec3 tangentY = normalize(cross(normal, tangentX)); + + // Convert to world Space + return normalize(tangentX * H.x + tangentY * H.y + normal * H.z); } // Normal Distribution function float D_GGX(float dotNH, float roughness) { - float alpha = roughness * roughness; - float alpha2 = alpha * alpha; - float denom = dotNH * dotNH * (alpha2 - 1.0) + 1.0; - return (alpha2)/(PI * denom*denom); + float alpha = roughness * roughness; + float alpha2 = alpha * alpha; + float denom = dotNH * dotNH * (alpha2 - 1.0) + 1.0; + return (alpha2)/(PI * denom*denom); } vec4 prefilterEnvMap(vec3 R) { - vec3 N = R; - vec3 V = R; - vec4 color = vec4(0.0); - float totalWeight = 0.0; - float envMapDim = float(textureSize(reflectionProbes, 0).s); + vec3 N = R; + vec3 V = R; + vec4 color = vec4(0.0); + float totalWeight = 0.0; + float envMapDim = float(textureSize(reflectionProbes, 0).s); float roughness = mipLevel/max_probe_lod; int numSamples = max(int(PROBE_FILTER_SAMPLES*roughness), 1); float numMips = max_probe_lod+1; - for(uint i = 0u; i < numSamples; i++) { - vec2 Xi = hammersley2d(i, numSamples); - vec3 H = importanceSample_GGX(Xi, roughness, N); - vec3 L = 2.0 * dot(V, H) * H - V; - float dotNL = clamp(dot(N, L), 0.0, 1.0); - if(dotNL > 0.0) { - // Filtering based on https://placeholderart.wordpress.com/2015/07/28/implementation-notes-runtime-environment-map-filtering-for-image-based-lighting/ - - float dotNH = clamp(dot(N, H), 0.0, 1.0); - float dotVH = clamp(dot(V, H), 0.0, 1.0); - - // Probability Distribution Function - float pdf = D_GGX(dotNH, roughness) * dotNH / (4.0 * dotVH) + 0.0001; - // Slid angle of current smple - float omegaS = 1.0 / (float(numSamples) * pdf); - // Solid angle of 1 pixel across all cube faces - float omegaP = 4.0 * PI / (6.0 * envMapDim * envMapDim); - // Biased (+1.0) mip level for better result - float mipLevel = roughness == 0.0 ? 0.0 : clamp(0.5 * log2(omegaS / omegaP) + 1.0, 0.0f, max_probe_lod); - color += textureLod(reflectionProbes, vec4(L, sourceIdx), mipLevel) * dotNL; - totalWeight += dotNL; - } - } - return (color / totalWeight); + for(uint i = 0u; i < numSamples; i++) { + vec2 Xi = hammersley2d(i, numSamples); + vec3 H = importanceSample_GGX(Xi, roughness, N); + vec3 L = 2.0 * dot(V, H) * H - V; + float dotNL = clamp(dot(N, L), 0.0, 1.0); + if(dotNL > 0.0) { + // Filtering based on https://placeholderart.wordpress.com/2015/07/28/implementation-notes-runtime-environment-map-filtering-for-image-based-lighting/ + + float dotNH = clamp(dot(N, H), 0.0, 1.0); + float dotVH = clamp(dot(V, H), 0.0, 1.0); + + // Probability Distribution Function + float pdf = D_GGX(dotNH, roughness) * dotNH / (4.0 * dotVH) + 0.0001; + // Slid angle of current smple + float omegaS = 1.0 / (float(numSamples) * pdf); + // Solid angle of 1 pixel across all cube faces + float omegaP = 4.0 * PI / (6.0 * envMapDim * envMapDim); + // Biased (+1.0) mip level for better result + float mipLevel = roughness == 0.0 ? 0.0 : clamp(0.5 * log2(omegaS / omegaP) + 1.0, 0.0f, max_probe_lod); + color += textureLod(reflectionProbes, vec4(L, sourceIdx), mipLevel) * dotNL; + totalWeight += dotNL; + } + } + return (color / totalWeight); } void main() -{ - vec3 N = normalize(vary_dir); - frag_color = max(prefilterEnvMap(N), vec4(0)); +{ + vec3 N = normalize(vary_dir); + frag_color = max(prefilterEnvMap(N), vec4(0)); frag_color.a *= probe_strength; } // ============================================================================================================= -- cgit v1.2.3