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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 "Polyline3.h"
#include "VertexCollapse.h"
#include "Wm5Memory.h"
//----------------------------------------------------------------------------
Polyline3::Polyline3 (int numVertices, Vector3f* vertices, bool closed)
:
mNumVertices(numVertices),
mVertices(vertices),
mClosed(closed)
{
assertion(vertices && (closed ? numVertices >= 3 : numVertices >= 2),
"Invalid inputs.\n");
// Compute the vertex collapses.
VertexCollapse(mNumVertices, mVertices, mClosed, mIndexMap, mNumEdges,
mEdges);
// Polyline initially at full level of detail.
mVMin = (mClosed ? 3 : 2);
mVMax = mNumVertices;
}
//----------------------------------------------------------------------------
Polyline3::~Polyline3 ()
{
delete1(mVertices);
delete1(mEdges);
delete1(mIndexMap);
}
//----------------------------------------------------------------------------
void Polyline3::SetLevelOfDetail (int numVertices)
{
if (numVertices < mVMin || numVertices > mVMax)
{
return;
}
// Decrease level of detail.
while (mNumVertices > numVertices)
{
--mNumVertices;
mEdges[mIndexMap[mNumVertices]] = mEdges[2*mNumEdges - 1];
--mNumEdges;
}
// Increase level of detail.
while (mNumVertices < numVertices)
{
++mNumEdges;
mEdges[mIndexMap[mNumVertices]] = mNumVertices;
++mNumVertices;
}
}
//----------------------------------------------------------------------------
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