SL-17283 LLReflectionMapManager prototype. Remove snapshot code related overhead from reflection map renders. Add parallax correction and support for multiple reflection maps.

1 files changed, 106 insertions, 0 deletions

diff --git a/indra/newview/llreflectionmapmanager.cpp b/indra/newview/llreflectionmapmanager.cpp
new file mode 100644
index 0000000000..95b72e1d3b
--- /dev/null
+++ b/indra/newview/llreflectionmapmanager.cpp
@@ -0,0 +1,106 @@
+/**
+ * @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;
+    }
+}
+