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/**
* @file llmeshoptimizer.cpp
* @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
* $/LicenseInfo$
*/
#include "llmeshoptimizer.h"
#include "meshoptimizer.h"
LLMeshOptimizer::LLMeshOptimizer()
{
// Todo: Looks like for memory management, we can add allocator and deallocator callbacks
// Should be one time
// meshopt_setAllocator(allocate, deallocate);
}
LLMeshOptimizer::~LLMeshOptimizer()
{
}
//static
U64 LLMeshOptimizer::simplify(U16 *destination,
const U16 *indices,
U64 index_count,
const LLVector4a *vertex_positions,
U64 vertex_count,
U64 target_index_count,
F32 target_error,
F32* result_error
)
{
const size_t vertex_stride = 4; // should be either 0 or 4
// Consider running meshopt_generateShadowIndexBuffer<unsigned short> first.
// meshopt_generateShadowIndexBuffer is only needed if models don't use some of the vertices,
// but since we call optimize() in a lot of cases, it likely isn't needed
return meshopt_simplify<unsigned short>(destination,
indices,
index_count,
(const float*)vertex_positions, // verify that it is correct to convert to float
vertex_count,
vertex_stride,
target_index_count,
target_error,
result_error
);
}
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