Merge remote-tracking branch 'origin/DRTVWR-546' into DRTVWR-559

1 files changed, 83 insertions, 0 deletions

diff --git a/indra/llmeshoptimizer/llmeshoptimizer.h b/indra/llmeshoptimizer/llmeshoptimizer.h
new file mode 100644
index 0000000000..e8dd16dae9
--- /dev/null
+++ b/indra/llmeshoptimizer/llmeshoptimizer.h
@@ -0,0 +1,83 @@
+/** 
+* @file llmeshoptimizer.h
+* @brief Wrapper around meshoptimizer
+*
+* $LicenseInfo:firstyear=2021&license=viewerlgpl$
+* Second Life Viewer Source Code
+* Copyright (C) 2021, 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
+* $/LicenseInfo$
+*/
+#ifndef LLMESHOPTIMIZER_H
+#define LLMESHOPTIMIZER_H
+
+#include "linden_common.h"
+
+#include "llmath.h"
+
+class LLMeshOptimizer
+{
+public:
+    LLMeshOptimizer();
+    ~LLMeshOptimizer();
+
+    static void generateShadowIndexBuffer(
+        U16 *destination,
+        const U16 *indices,
+        U64 index_count,
+        const LLVector4a *vertex_positions,
+        U64 vertex_count,
+        U64 vertex_positions_stride);
+
+    // returns amount of indices in destiantion
+    // sloppy engages a variant of a mechanizm that does not respect topology as much
+    // but is much more efective for simpler models
+    // result_error returns how far from original the model is in % if not NULL
+    // Works with U32 indices (LLFace uses U16 indices)
+    static U64 simplifyU32(
+        U32 *destination,
+        const U32 *indices,
+        U64 index_count,
+        const LLVector4a *vertex_positions,
+        U64 vertex_count,
+        U64 vertex_positions_stride,
+        U64 target_index_count,
+        F32 target_error,
+        bool sloppy,
+        F32* result_error);
+
+    // Returns amount of indices in destiantion
+    // sloppy engages a variant of a mechanizm that does not respect topology as much
+    // but is much better for simpler models
+    // result_error returns how far from original the model is in % if not NULL
+    // Meant for U16 indices (LLFace uses U16 indices)
+    static U64 simplify(
+        U16 *destination,
+        const U16 *indices,
+        U64 index_count,
+        const LLVector4a *vertex_positions,
+        U64 vertex_count,
+        U64 vertex_positions_stride,
+        U64 target_index_count,
+        F32 target_error,
+        bool sloppy,
+        F32* result_error);
+private:
+};
+
+#endif //LLMESHOPTIMIZER_H