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/**
* @file llreflectionmapmanager.cpp
* @brief LLReflectionMapManager 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 "llreflectionmapmanager.h"
#include "llviewercamera.h"
LLReflectionMapManager::LLReflectionMapManager()
{
}
struct CompareReflectionMapDistance
{
};
struct CompareProbeDistance
{
bool operator()(const LLReflectionMap& lhs, const LLReflectionMap& rhs)
{
return lhs.mDistance < rhs.mDistance;
}
};
// helper class to seed octree with probes
void LLReflectionMapManager::update()
{
LL_PROFILE_ZONE_SCOPED_CATEGORY_DISPLAY;
// naively drop probes every 16m as we move the camera around for now
// later, use LLSpatialPartition to manage probes
const F32 PROBE_SPACING = 16.f;
const U32 MAX_PROBES = 8;
LLVector4a camera_pos;
camera_pos.load3(LLViewerCamera::instance().getOrigin().mV);
for (auto& probe : mProbes)
{
LLVector4a d;
d.setSub(camera_pos, probe.mOrigin);
probe.mDistance = d.getLength3().getF32();
}
if (mProbes.empty() || mProbes[0].mDistance > PROBE_SPACING)
{
addProbe(LLViewerCamera::instance().getOrigin());
}
// update distance to camera for all probes
std::sort(mProbes.begin(), mProbes.end(), CompareProbeDistance());
if (mProbes.size() > MAX_PROBES)
{
mProbes.resize(MAX_PROBES);
}
}
void LLReflectionMapManager::addProbe(const LLVector3& pos)
{
LLReflectionMap probe;
probe.update(pos, 1024);
mProbes.push_back(probe);
}
void LLReflectionMapManager::getReflectionMaps(std::vector<LLReflectionMap*>& maps)
{
// just null out for now
U32 i = 0;
for (i = 0; i < maps.size() && i < mProbes.size(); ++i)
{
maps[i] = &(mProbes[i]);
}
for (++i; i < maps.size(); ++i)
{
maps[i] = nullptr;
}
}
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