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phoenix-firestorm/indra/newview/llheroprobemanager.cpp

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/**
* @file LLHeroProbeManager.cpp
* @brief LLHeroProbeManager class implementation
*
* $LicenseInfo:firstyear=2022&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#include "llviewerprecompiledheaders.h"
#include "llheroprobemanager.h"
#include "llreflectionmapmanager.h"
#include "llviewercamera.h"
#include "llspatialpartition.h"
#include "llviewerregion.h"
#include "pipeline.h"
#include "llviewershadermgr.h"
#include "llviewercontrol.h"
#include "llenvironment.h"
#include "llstartup.h"
#include "llagent.h"
#include "llagentcamera.h"
#include "llviewerwindow.h"
#include "llviewerjoystick.h"
#include "llviewermediafocus.h"
extern bool gCubeSnapshot;
extern bool gTeleportDisplay;
// get the next highest power of two of v (or v if v is already a power of two)
//defined in llvertexbuffer.cpp
extern U32 nhpo2(U32 v);
static void touch_default_probe(LLReflectionMap* probe)
{
if (LLViewerCamera::getInstance())
{
LLVector3 origin = LLViewerCamera::getInstance()->getOrigin();
origin.mV[2] += 64.f;
probe->mOrigin.load3(origin.mV);
}
}
LLHeroProbeManager::LLHeroProbeManager()
{
}
LLHeroProbeManager::~LLHeroProbeManager()
{
cleanup();
mHeroVOList.clear();
mNearestHero = nullptr;
}
// helper class to seed octree with probes
void LLHeroProbeManager::update()
{
if (!LLPipeline::RenderMirrors || !LLPipeline::sReflectionProbesEnabled || gTeleportDisplay || LLStartUp::getStartupState() < STATE_PRECACHE)
{
return;
}
LL_PROFILE_ZONE_SCOPED_CATEGORY_DISPLAY;
llassert(!gCubeSnapshot); // assert a snapshot is not in progress
if (LLAppViewer::instance()->logoutRequestSent())
{
return;
}
initReflectionMaps();
if (!mRenderTarget.isComplete())
{
U32 color_fmt = GL_RGBA16F;
mRenderTarget.allocate(mProbeResolution, mProbeResolution, color_fmt, true);
}
if (mMipChain.empty())
{
U32 res = mProbeResolution;
U32 count = log2((F32)res) + 0.5f;
mMipChain.resize(count);
for (int i = 0; i < count; ++i)
{
mMipChain[i].allocate(res, res, GL_RGBA16F);
res /= 2;
}
}
llassert(mProbes[0] == mDefaultProbe);
LLVector4a probe_pos;
LLVector3 camera_pos = LLViewerCamera::instance().mOrigin;
bool probe_present = false;
LLQuaternion cameraOrientation = LLViewerCamera::instance().getQuaternion();
LLVector3 cameraDirection = LLVector3::z_axis * cameraOrientation;
if (mHeroVOList.size() > 0)
{
// Find our nearest hero candidate.
float last_distance = 99999.f;
float camera_center_distance = 99999.f;
for (auto vo : mHeroVOList)
{
if (vo && !vo->isDead() && vo->mDrawable.notNull() && vo->isReflectionProbe() && vo->getReflectionProbeIsBox())
{
float distance = (LLViewerCamera::instance().getOrigin() - vo->getPositionAgent()).magVec();
float center_distance = cameraDirection * (vo->getPositionAgent() - camera_pos);
if (distance > LLViewerCamera::instance().getFar())
continue;
LLVector4a center;
center.load3(vo->getPositionAgent().mV);
LLVector4a size;
size.load3(vo->getScale().mV);
bool visible = LLViewerCamera::instance().AABBInFrustum(center, size);
if (distance < last_distance && center_distance < camera_center_distance && visible)
{
probe_present = true;
mNearestHero = vo;
last_distance = distance;
camera_center_distance = center_distance;
}
}
else
{
unregisterViewerObject(vo);
}
}
// Don't even try to do anything if we didn't find a single mirror present.
if (!probe_present)
return;
if (mNearestHero != nullptr && !mNearestHero->isDead() && mNearestHero->mDrawable.notNull())
{
LLVector3 hero_pos = mNearestHero->getPositionAgent();
LLVector3 face_normal = LLVector3(0, 0, 1);
face_normal *= mNearestHero->mDrawable->getWorldRotation();
face_normal.normalize();
LLVector3 offset = camera_pos - hero_pos;
LLVector3 project = face_normal * (offset * face_normal);
LLVector3 reject = offset - project;
LLVector3 point = (reject - project) + hero_pos;
mCurrentClipPlane.setVec(hero_pos, face_normal);
mMirrorPosition = hero_pos;
mMirrorNormal = face_normal;
probe_pos.load3(point.mV);
// Detect visible faces of a cube based on camera direction and distance
// Define the cube faces
static LLVector3 cubeFaces[6] = {
LLVector3(1, 0, 0),
LLVector3(-1, 0, 0),
LLVector3(0, 1, 0),
LLVector3(0, -1, 0),
LLVector3(0, 0, 1),
LLVector3(0, 0, -1)
};
// Iterate through each face of the cube
for (int i = 0; i < 6; i++)
{
float cube_facing = fmax(-1, fmin(1.0f, cameraDirection * cubeFaces[i]));
cube_facing = 1 - cube_facing;
mFaceUpdateList[i] = ceilf(cube_facing * gPipeline.RenderHeroProbeConservativeUpdateMultiplier);
}
mProbes[0]->mOrigin = probe_pos;
}
else
{
mNearestHero = nullptr;
}
mHeroProbeStrength = 1;
}
}
void LLHeroProbeManager::renderProbes()
{
if (!LLPipeline::RenderMirrors || !LLPipeline::sReflectionProbesEnabled || gTeleportDisplay ||
LLStartUp::getStartupState() < STATE_PRECACHE)
{
return;
}
static LLCachedControl<S32> sDetail(gSavedSettings, "RenderHeroReflectionProbeDetail", -1);
static LLCachedControl<S32> sLevel(gSavedSettings, "RenderHeroReflectionProbeLevel", 3);
F32 near_clip = 0.01f;
if (mNearestHero != nullptr && (gPipeline.RenderHeroProbeUpdateRate == 0 || (gFrameCount % gPipeline.RenderHeroProbeUpdateRate) == 0) &&
!gTeleportDisplay && !gDisconnected && !LLAppViewer::instance()->logoutRequestSent())
{
LL_PROFILE_ZONE_NAMED_CATEGORY_DISPLAY("hpmu - realtime");
bool radiance_pass = gPipeline.mReflectionMapManager.isRadiancePass();
gPipeline.mReflectionMapManager.mRadiancePass = true;
mRenderingMirror = true;
doOcclusion();
for (U32 j = 0; j < mProbes.size(); j++)
{
for (U32 i = 0; i < 6; ++i)
{
if (mFaceUpdateList[i] > 0 && mCurrentProbeUpdateFrame % mFaceUpdateList[i] == 0)
{
updateProbeFace(mProbes[j], i, mNearestHero->getReflectionProbeIsDynamic() && sDetail > 0, near_clip);
mCurrentProbeUpdateFrame = 0;
}
}
generateRadiance(mProbes[j]);
}
mRenderingMirror = false;
gPipeline.mReflectionMapManager.mRadiancePass = radiance_pass;
mProbes[0]->mViewerObject = mNearestHero;
mProbes[0]->autoAdjustOrigin();
}
mCurrentProbeUpdateFrame++;
}
// Do the reflection map update render passes.
// For every 12 calls of this function, one complete reflection probe radiance map and irradiance map is generated
// First six passes render the scene with direct lighting only into a scratch space cube map at the end of the cube map array and generate
// a simple mip chain (not convolution filter).
// At the end of these passes, an irradiance map is generated for this probe and placed into the irradiance cube map array at the index for this probe
// The next six passes render the scene with both radiance and irradiance into the same scratch space cube map and generate a simple mip chain.
// At the end of these passes, a radiance map is generated for this probe and placed into the radiance cube map array at the index for this probe.
// In effect this simulates single-bounce lighting.
void LLHeroProbeManager::updateProbeFace(LLReflectionMap* probe, U32 face, bool is_dynamic, F32 near_clip)
{
// hacky hot-swap of camera specific render targets
gPipeline.mRT = &gPipeline.mHeroProbeRT;
probe->update(mRenderTarget.getWidth(), face, is_dynamic, near_clip);
gPipeline.mRT = &gPipeline.mMainRT;
S32 sourceIdx = mReflectionProbeCount;
// Unlike the reflectionmap manager, all probes are considered "realtime" for hero probes.
sourceIdx += 1;
gGL.setColorMask(true, true);
LLGLDepthTest depth(GL_FALSE, GL_FALSE);
LLGLDisable cull(GL_CULL_FACE);
LLGLDisable blend(GL_BLEND);
// downsample to placeholder map
{
gGL.matrixMode(gGL.MM_MODELVIEW);
gGL.pushMatrix();
gGL.loadIdentity();
gGL.matrixMode(gGL.MM_PROJECTION);
gGL.pushMatrix();
gGL.loadIdentity();
gGL.flush();
U32 res = mProbeResolution * 2;
static LLStaticHashedString resScale("resScale");
static LLStaticHashedString direction("direction");
static LLStaticHashedString znear("znear");
static LLStaticHashedString zfar("zfar");
LLRenderTarget *screen_rt = &gPipeline.mHeroProbeRT.screen;
LLRenderTarget *depth_rt = &gPipeline.mHeroProbeRT.deferredScreen;
// perform a gaussian blur on the super sampled render before downsampling
{
gGaussianProgram.bind();
gGaussianProgram.uniform1f(resScale, 1.f / (mProbeResolution * 2));
S32 diffuseChannel = gGaussianProgram.enableTexture(LLShaderMgr::DEFERRED_DIFFUSE, LLTexUnit::TT_TEXTURE);
// horizontal
gGaussianProgram.uniform2f(direction, 1.f, 0.f);
gGL.getTexUnit(diffuseChannel)->bind(screen_rt);
mRenderTarget.bindTarget();
gPipeline.mScreenTriangleVB->setBuffer();
gPipeline.mScreenTriangleVB->drawArrays(LLRender::TRIANGLES, 0, 3);
mRenderTarget.flush();
// vertical
gGaussianProgram.uniform2f(direction, 0.f, 1.f);
gGL.getTexUnit(diffuseChannel)->bind(&mRenderTarget);
screen_rt->bindTarget();
gPipeline.mScreenTriangleVB->setBuffer();
gPipeline.mScreenTriangleVB->drawArrays(LLRender::TRIANGLES, 0, 3);
screen_rt->flush();
gGaussianProgram.unbind();
}
S32 mips = log2((F32)mProbeResolution) + 0.5f;
gReflectionMipProgram.bind();
S32 diffuseChannel = gReflectionMipProgram.enableTexture(LLShaderMgr::DEFERRED_DIFFUSE, LLTexUnit::TT_TEXTURE);
S32 depthChannel = gReflectionMipProgram.enableTexture(LLShaderMgr::DEFERRED_DEPTH, LLTexUnit::TT_TEXTURE);
for (int i = 0; i < mMipChain.size(); ++i)
{
LL_PROFILE_GPU_ZONE("probe mip");
mMipChain[i].bindTarget();
if (i == 0)
{
gGL.getTexUnit(diffuseChannel)->bind(screen_rt);
}
else
{
gGL.getTexUnit(diffuseChannel)->bind(&(mMipChain[i - 1]));
}
gGL.getTexUnit(depthChannel)->bind(depth_rt, true);
gReflectionMipProgram.uniform1f(resScale, 1.f / (mProbeResolution * 2));
gReflectionMipProgram.uniform1f(znear, probe->getNearClip());
gReflectionMipProgram.uniform1f(zfar, MAX_FAR_CLIP);
gPipeline.mScreenTriangleVB->setBuffer();
gPipeline.mScreenTriangleVB->drawArrays(LLRender::TRIANGLES, 0, 3);
res /= 2;
S32 mip = i - (mMipChain.size() - mips);
if (mip >= 0)
{
LL_PROFILE_GPU_ZONE("probe mip copy");
mTexture->bind(0);
glCopyTexSubImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, mip, 0, 0, sourceIdx * 6 + face, 0, 0, res, res);
mTexture->unbind();
}
mMipChain[i].flush();
}
gGL.popMatrix();
gGL.matrixMode(gGL.MM_MODELVIEW);
gGL.popMatrix();
gGL.getTexUnit(diffuseChannel)->unbind(LLTexUnit::TT_TEXTURE);
gReflectionMipProgram.unbind();
}
}
// Separate out radiance generation as a separate stage.
// This is to better enable independent control over how we generate radiance vs. having it coupled with processing the final face of the probe.
// Useful when we may not always be rendering a full set of faces of the probe.
void LLHeroProbeManager::generateRadiance(LLReflectionMap* probe)
{
S32 sourceIdx = mReflectionProbeCount;
// Unlike the reflectionmap manager, all probes are considered "realtime" for hero probes.
sourceIdx += 1;
{
mMipChain[0].bindTarget();
static LLStaticHashedString sSourceIdx("sourceIdx");
{
// generate radiance map (even if this is not the irradiance map, we need the mip chain for the irradiance map)
gHeroRadianceGenProgram.bind();
mVertexBuffer->setBuffer();
S32 channel = gHeroRadianceGenProgram.enableTexture(LLShaderMgr::REFLECTION_PROBES, LLTexUnit::TT_CUBE_MAP_ARRAY);
mTexture->bind(channel);
gHeroRadianceGenProgram.uniform1i(sSourceIdx, sourceIdx);
gHeroRadianceGenProgram.uniform1f(LLShaderMgr::REFLECTION_PROBE_MAX_LOD, mMaxProbeLOD);
gHeroRadianceGenProgram.uniform1f(LLShaderMgr::REFLECTION_PROBE_STRENGTH, mHeroProbeStrength);
U32 res = mMipChain[0].getWidth();
for (int i = 0; i < mMipChain.size() / 4; ++i)
{
LL_PROFILE_GPU_ZONE("probe radiance gen");
static LLStaticHashedString sMipLevel("mipLevel");
static LLStaticHashedString sRoughness("roughness");
static LLStaticHashedString sWidth("u_width");
static LLStaticHashedString sStrength("probe_strength");
gHeroRadianceGenProgram.uniform1f(sRoughness, (F32) i / (F32) (mMipChain.size() - 1));
gHeroRadianceGenProgram.uniform1f(sMipLevel, i);
gHeroRadianceGenProgram.uniform1i(sWidth, mProbeResolution);
gHeroRadianceGenProgram.uniform1f(sStrength, 1);
for (int cf = 0; cf < 6; ++cf)
{ // for each cube face
LLCoordFrame frame;
frame.lookAt(LLVector3(0, 0, 0), LLCubeMapArray::sClipToCubeLookVecs[cf], LLCubeMapArray::sClipToCubeUpVecs[cf]);
F32 mat[16];
frame.getOpenGLRotation(mat);
gGL.loadMatrix(mat);
mVertexBuffer->drawArrays(gGL.TRIANGLE_STRIP, 0, 4);
glCopyTexSubImage3D(GL_TEXTURE_CUBE_MAP_ARRAY, i, 0, 0, probe->mCubeIndex * 6 + cf, 0, 0, res, res);
}
if (i != mMipChain.size() - 1)
{
res /= 2;
glViewport(0, 0, res, res);
}
}
gHeroRadianceGenProgram.unbind();
}
mMipChain[0].flush();
}
}
void LLHeroProbeManager::updateUniforms()
{
if (!gPipeline.RenderMirrors)
{
return;
}
LL_PROFILE_ZONE_SCOPED_CATEGORY_DISPLAY;
LLMatrix4a modelview;
modelview.loadu(gGLModelView);
LLVector4a oa; // scratch space for transformed origin
oa.set(0, 0, 0, 0);
mHeroData.heroProbeCount = 1;
if (mNearestHero != nullptr && !mNearestHero->isDead())
{
if (mNearestHero->getReflectionProbeIsBox())
{
LLVector3 s = mNearestHero->getScale().scaledVec(LLVector3(0.5f, 0.5f, 0.5f));
mProbes[0]->mRadius = s.magVec();
}
else
{
mProbes[0]->mRadius = mNearestHero->getScale().mV[0] * 0.5f;
}
modelview.affineTransform(mProbes[0]->mOrigin, oa);
mHeroData.heroShape = 0;
if (!mProbes[0]->getBox(mHeroData.heroBox))
{
mHeroData.heroShape = 1;
}
mHeroData.heroSphere.set(oa.getF32ptr());
mHeroData.heroSphere.mV[3] = mProbes[0]->mRadius;
}
mHeroData.heroMipCount = mMipChain.size();
}
void LLHeroProbeManager::renderDebug()
{
gDebugProgram.bind();
for (auto& probe : mProbes)
{
renderReflectionProbe(probe);
}
gDebugProgram.unbind();
}
void LLHeroProbeManager::initReflectionMaps()
{
U32 count = LL_MAX_HERO_PROBE_COUNT;
if ((mTexture.isNull() || mReflectionProbeCount != count || mReset) && LLPipeline::RenderMirrors)
{
if (mReset)
{
cleanup();
}
mReset = false;
mReflectionProbeCount = count;
mProbeResolution = gSavedSettings.getS32("RenderHeroProbeResolution");
mMaxProbeLOD = log2f(mProbeResolution) - 1.f; // number of mips - 1
mTexture = new LLCubeMapArray();
// store mReflectionProbeCount+2 cube maps, final two cube maps are used for render target and radiance map generation source)
mTexture->allocate(mProbeResolution, 3, mReflectionProbeCount + 2);
if (mDefaultProbe.isNull())
{
llassert(mProbes.empty()); // default probe MUST be the first probe created
mDefaultProbe = new LLReflectionMap();
mProbes.push_back(mDefaultProbe);
}
llassert(mProbes[0] == mDefaultProbe);
// For hero probes, we treat this as the main mirror probe.
mDefaultProbe->mCubeIndex = 0;
mDefaultProbe->mCubeArray = mTexture;
mDefaultProbe->mDistance = gSavedSettings.getF32("RenderHeroProbeDistance");
mDefaultProbe->mRadius = 4096.f;
mDefaultProbe->mProbeIndex = 0;
touch_default_probe(mDefaultProbe);
mProbes.push_back(mDefaultProbe);
}
if (mVertexBuffer.isNull())
{
U32 mask = LLVertexBuffer::MAP_VERTEX;
LLPointer<LLVertexBuffer> buff = new LLVertexBuffer(mask);
buff->allocateBuffer(4, 0);
LLStrider<LLVector3> v;
buff->getVertexStrider(v);
v[0] = LLVector3(-1, -1, -1);
v[1] = LLVector3(1, -1, -1);
v[2] = LLVector3(-1, 1, -1);
v[3] = LLVector3(1, 1, -1);
buff->unmapBuffer();
mVertexBuffer = buff;
}
}
void LLHeroProbeManager::cleanup()
{
mVertexBuffer = nullptr;
mRenderTarget.release();
mHeroRenderTarget.release();
mMipChain.clear();
mTexture = nullptr;
mProbes.clear();
mReflectionMaps.clear();
mDefaultProbe = nullptr;
mUpdatingProbe = nullptr;
}
void LLHeroProbeManager::doOcclusion()
{
LLVector4a eye;
eye.load3(LLViewerCamera::instance().getOrigin().mV);
for (auto& probe : mProbes)
{
if (probe != nullptr && probe != mDefaultProbe)
{
probe->doOcclusion(eye);
}
}
}
void LLHeroProbeManager::reset()
{
mReset = true;
}
bool LLHeroProbeManager::registerViewerObject(LLVOVolume* drawablep)
{
llassert(drawablep != nullptr);
if (std::find(mHeroVOList.begin(), mHeroVOList.end(), drawablep) == mHeroVOList.end())
{
// Probe isn't in our list for consideration. Add it.
mHeroVOList.push_back(drawablep);
return true;
}
return false;
}
void LLHeroProbeManager::unregisterViewerObject(LLVOVolume* drawablep)
{
std::vector<LLPointer<LLVOVolume>>::iterator found_itr = std::find(mHeroVOList.begin(), mHeroVOList.end(), drawablep);
if (found_itr != mHeroVOList.end())
{
mHeroVOList.erase(found_itr);
}
}
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