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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 "Wm5Polysegment.h"
using namespace Wm5;
WM5_IMPLEMENT_RTTI(Wm5, Visual, Polysegment);
WM5_IMPLEMENT_STREAM(Polysegment);
WM5_IMPLEMENT_FACTORY(Polysegment);
WM5_IMPLEMENT_DEFAULT_NAMES(Visual, Polysegment);
//----------------------------------------------------------------------------
Polysegment::Polysegment (VertexFormat* vformat, VertexBuffer* vbuffer,
bool contiguous)
:
Visual(contiguous ? PT_POLYSEGMENTS_CONTIGUOUS : PT_POLYSEGMENTS_DISJOINT,
vformat, vbuffer, 0),
mContiguous(contiguous)
{
int numVertices = mVBuffer->GetNumElements();
assertion(numVertices >= 2,
"Polysegments must have at least two points.\n");
if (mContiguous)
{
mNumSegments = numVertices - 1;
}
else
{
assertion((numVertices & 1) == 0,
"Disconnected segments require an even number of vertices.\n");
mNumSegments = numVertices/2;
}
}
//----------------------------------------------------------------------------
Polysegment::~Polysegment ()
{
}
//----------------------------------------------------------------------------
int Polysegment::GetMaxNumSegments () const
{
int numVertices = mVBuffer->GetNumElements();
return mContiguous ? numVertices - 1 : numVertices/2;
}
//----------------------------------------------------------------------------
void Polysegment::SetNumSegments (int numSegments)
{
int numVertices = mVBuffer->GetNumElements();
if (mContiguous)
{
int numVerticesM1 = numVertices - 1;
if (0 <= numSegments && numSegments <= numVerticesM1)
{
mNumSegments = numSegments;
}
else
{
mNumSegments = numVerticesM1;
}
}
else
{
int numVerticesD2 = numVertices/2;
if (0 <= numSegments && numSegments <= numVerticesD2)
{
mNumSegments = numSegments;
}
else
{
mNumSegments = numVerticesD2;
}
}
}
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// Streaming support.
//----------------------------------------------------------------------------
Polysegment::Polysegment (LoadConstructor value)
:
Visual(value),
mNumSegments(0),
mContiguous(false)
{
}
//----------------------------------------------------------------------------
void Polysegment::Load (InStream& source)
{
WM5_BEGIN_DEBUG_STREAM_LOAD(source);
Visual::Load(source);
source.Read(mNumSegments);
source.ReadBool(mContiguous);
WM5_END_DEBUG_STREAM_LOAD(Polysegment, source);
}
//----------------------------------------------------------------------------
void Polysegment::Link (InStream& source)
{
Visual::Link(source);
}
//----------------------------------------------------------------------------
void Polysegment::PostLink ()
{
Visual::PostLink();
}
//----------------------------------------------------------------------------
bool Polysegment::Register (OutStream& target) const
{
return Visual::Register(target);
}
//----------------------------------------------------------------------------
void Polysegment::Save (OutStream& target) const
{
WM5_BEGIN_DEBUG_STREAM_SAVE(target);
Visual::Save(target);
target.Write(mNumSegments);
target.WriteBool(mContiguous);
WM5_END_DEBUG_STREAM_SAVE(Polysegment, target);
}
//----------------------------------------------------------------------------
int Polysegment::GetStreamingSize () const
{
int size = Visual::GetStreamingSize();
size += sizeof(mNumSegments);
size += WM5_BOOLSIZE(mContiguous);
return size;
}
//----------------------------------------------------------------------------
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