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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.0 (2010/01/01)
#include "Wm5GraphicsPCH.h"
#include "Wm5ClodMesh.h"
#include "Wm5Renderer.h"
using namespace Wm5;
WM5_IMPLEMENT_RTTI(Wm5, TriMesh, ClodMesh);
WM5_IMPLEMENT_STREAM(ClodMesh);
WM5_IMPLEMENT_FACTORY(ClodMesh);
//----------------------------------------------------------------------------
ClodMesh::ClodMesh (TriMesh* mesh, CollapseRecordArray* recordArray)
:
TriMesh(mesh->GetVertexFormat(), mesh->GetVertexBuffer(), 0),
mCurrentRecord(0),
mTargetRecord(0),
mRecordArray(recordArray)
{
assertion(recordArray != 0, "Record array is needed for construction.\n");
// Make a copy of the indices.
IndexBuffer* ibuffer = mesh->GetIndexBuffer();
int numIndices = ibuffer->GetNumElements();
int elementSize = ibuffer->GetElementSize();
assertion(elementSize == 4, "Invalid indices.\n");
char* srcIndices = ibuffer->GetData();
mIBuffer = new0 IndexBuffer(numIndices, elementSize);
char* trgIndices = mIBuffer->GetData();
memcpy(trgIndices, srcIndices, numIndices*elementSize);
}
//----------------------------------------------------------------------------
ClodMesh::~ClodMesh ()
{
}
//----------------------------------------------------------------------------
void ClodMesh::SelectLevelOfDetail ()
{
const CollapseRecord* records = mRecordArray->GetRecords();
// Get the target record. The virtual function may be overridden by a
// derived class to obtain a desired automated change in the target.
int targetRecord = GetAutomatedTargetRecord();
// Collapse the mesh, if necessary.
int* indices = (int*)mIBuffer->GetData();
bool ibufferChanged = (mCurrentRecord != targetRecord);
int i, c;
while (mCurrentRecord < targetRecord)
{
++mCurrentRecord;
// Replace indices in the connectivity array.
const CollapseRecord& record = records[mCurrentRecord];
for (i = 0; i < record.NumIndices; ++i)
{
c = record.Indices[i];
assertion(indices[c] == record.VThrow,
"Inconsistent record in SelectLevelOfDetail.\n");
indices[c] = record.VKeep;
}
// Reduce the vertex count; the vertices are properly ordered.
mVBuffer->SetNumElements(record.NumVertices);
// Reduce the triangle count; the triangles are properly ordered.
mIBuffer->SetNumElements(3*record.NumTriangles);
}
// Expand the mesh, if necessary.
while (mCurrentRecord > targetRecord)
{
// Restore indices in the connectivity array.
const CollapseRecord& record = records[mCurrentRecord];
for (i = 0; i < record.NumIndices; ++i)
{
c = record.Indices[i];
assertion(indices[c] == record.VKeep,
"Inconsistent record in SelectLevelOfDetail.\n");
indices[c] = record.VThrow;
}
--mCurrentRecord;
const CollapseRecord& prevRecord = records[mCurrentRecord];
// Increase the vertex count; the vertices are properly ordered.
mVBuffer->SetNumElements(prevRecord.NumVertices);
// Increase the triangle count; the triangles are properly ordered.
mIBuffer->SetNumElements(3*prevRecord.NumTriangles);
}
if (ibufferChanged)
{
Renderer::UpdateAll(mIBuffer);
}
}
//----------------------------------------------------------------------------
void ClodMesh::GetVisibleSet (Culler& culler, bool noCull)
{
SelectLevelOfDetail();
TriMesh::GetVisibleSet(culler, noCull);
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Name support.
//----------------------------------------------------------------------------
Object* ClodMesh::GetObjectByName (const std::string& name)
{
Object* found = TriMesh::GetObjectByName(name);
if (found)
{
return found;
}
WM5_GET_OBJECT_BY_NAME(mRecordArray, name, found);
return 0;
}
//----------------------------------------------------------------------------
void ClodMesh::GetAllObjectsByName (const std::string& name,
std::vector<Object*>& objects)
{
TriMesh::GetAllObjectsByName(name, objects);
WM5_GET_ALL_OBJECTS_BY_NAME(mRecordArray, name, objects);
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Streaming support.
//----------------------------------------------------------------------------
ClodMesh::ClodMesh (LoadConstructor value)
:
TriMesh(value),
mCurrentRecord(0),
mTargetRecord(0)
{
}
//----------------------------------------------------------------------------
void ClodMesh::Load (InStream& source)
{
WM5_BEGIN_DEBUG_STREAM_LOAD(source);
TriMesh::Load(source);
source.Read(mCurrentRecord);
source.Read(mTargetRecord);
source.ReadPointer(mRecordArray);
WM5_END_DEBUG_STREAM_LOAD(ClodMesh, source);
}
//----------------------------------------------------------------------------
void ClodMesh::Link (InStream& source)
{
TriMesh::Link(source);
source.ResolveLink(mRecordArray);
}
//----------------------------------------------------------------------------
void ClodMesh::PostLink ()
{
TriMesh::PostLink();
}
//----------------------------------------------------------------------------
bool ClodMesh::Register (OutStream& target) const
{
if (TriMesh::Register(target))
{
target.Register(mRecordArray);
return true;
}
return false;
}
//----------------------------------------------------------------------------
void ClodMesh::Save (OutStream& target) const
{
WM5_BEGIN_DEBUG_STREAM_SAVE(target);
TriMesh::Save(target);
target.Write(mCurrentRecord);
target.Write(mTargetRecord);
target.WritePointer(mRecordArray);
WM5_END_DEBUG_STREAM_SAVE(ClodMesh, target);
}
//----------------------------------------------------------------------------
int ClodMesh::GetStreamingSize () const
{
int size = TriMesh::GetStreamingSize();
size += sizeof(mCurrentRecord);
size += sizeof(mTargetRecord);
size += WM5_POINTERSIZE(mRecordArray);
return size;
}
//----------------------------------------------------------------------------
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