diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl')
| -rw-r--r-- | indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl index da467cd5da..49470f0e39 100644 --- a/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/aoUtil.glsl @@ -1,24 +1,24 @@ -/** +/** * @file class1/deferred/aoUtil.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 * $/LicenseInfo$ */ @@ -70,7 +70,7 @@ vec2 getKern(int i) kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750; kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875; kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000; - + return kern[i] / screen_res; } @@ -83,33 +83,33 @@ float calcAmbientOcclusion(vec4 pos, vec3 norm, vec2 pos_screen) float angle_hidden = 0.0; float points = 0; - + float scale = min(ssao_radius / -pos_world.z, ssao_max_radius); - + // it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?) for (int i = 0; i < 8; i++) { vec2 samppos_screen = pos_screen + scale * reflect(getKern(i), noise_reflect); - vec3 samppos_world = getPositionAo(samppos_screen).xyz; + vec3 samppos_world = getPositionAo(samppos_screen).xyz; vec3 diff = pos_world - samppos_world; float dist2 = dot(diff, diff); - + // assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area // --> solid angle shrinking by the square of distance //radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2 //(k should vary inversely with # of samples, but this is taken care of later) - + float funky_val = (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) ? 1.0 : 0.0; angle_hidden = angle_hidden + funky_val * min(1.0/dist2, ssao_factor_inv); - - // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" + + // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" float diffz_val = (diff.z > -1.0) ? 1.0 : 0.0; points = points + diffz_val; } - + angle_hidden = min(ssao_factor*angle_hidden/points, 1.0); - + float points_val = (points > 0.0) ? 1.0 : 0.0; ret = (1.0 - (points_val * angle_hidden)); |