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Initial commit of ResInsight version 0.4.8

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Alf B. Rustad
2012-05-18 09:45:23 +02:00
parent a680bf941e
commit dfe97efb1b
657 changed files with 176690 additions and 0 deletions
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204
VisualizationModules/LibRender/cvfPrimitiveSet.cpp Normal file
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//##################################################################################################
//
// Custom Visualization Core library
// Copyright (C) 2011-2012 Ceetron AS
//
// This library is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// 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 General Public License at <<http://www.gnu.org/licenses/gpl.html>>
// for more details.
//
//##################################################################################################
#include "cvfBase.h"
#include "cvfAssert.h"
#include "cvfMath.h"
#include "cvfPrimitiveSet.h"
#include "cvfOpenGL.h"
namespace cvf {
//==================================================================================================
///
/// \class cvf::PrimitiveSet
/// \ingroup Render
///
///
///
//==================================================================================================
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
PrimitiveSet::PrimitiveSet(PrimitiveType primitiveType)
: m_primitiveType(primitiveType)
{
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
PrimitiveType PrimitiveSet::primitiveType() const
{
return m_primitiveType;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
cvfGLenum PrimitiveSet::primitiveTypeOpenGL() const
{
switch (m_primitiveType)
{
case PT_POINTS: return GL_POINTS;
case PT_LINES: return GL_LINES;
case PT_LINE_LOOP: return GL_LINE_LOOP;
case PT_LINE_STRIP: return GL_LINE_STRIP;
case PT_TRIANGLES: return GL_TRIANGLES;
case PT_TRIANGLE_STRIP: return GL_TRIANGLE_STRIP;
case PT_TRIANGLE_FAN: return GL_TRIANGLE_FAN;
default: CVF_FAIL_MSG("Unhandled primitive type");
}
return UNDEFINED_UINT;
}
//--------------------------------------------------------------------------------------------------
/// Returns the number of triangles in this primitive group
//--------------------------------------------------------------------------------------------------
size_t PrimitiveSet::triangleCount() const
{
if (m_primitiveType != PT_TRIANGLES)
{
return 0;
}
CVF_ASSERT(indexCount()%3 == 0);
return indexCount()/3;
}
//--------------------------------------------------------------------------------------------------
///
//--------------------------------------------------------------------------------------------------
size_t PrimitiveSet::faceCount() const
{
switch (m_primitiveType)
{
case PT_POINTS: return indexCount();
case PT_LINES: return indexCount()/2;
case PT_LINE_LOOP: return indexCount();
case PT_LINE_STRIP: return indexCount() - 1;
case PT_TRIANGLES: return triangleCount();
case PT_TRIANGLE_STRIP: return indexCount() - 2;
case PT_TRIANGLE_FAN: return indexCount() - 2;
default: CVF_FAIL_MSG("Unhandled primitive type");
}
return 0;
}
//--------------------------------------------------------------------------------------------------
/// Gets connectivity for one face in this primitive set
///
/// The indices array will be populated with the connectivities for the specified face.
/// The connectivity table will have 1, 2, 3 or 4 entries. If this primitive set consists
/// of a triangle fan, triangles will be returned. In a similar fashion, if the primitive set
/// consist of a quad strip, quads will be returned.
//--------------------------------------------------------------------------------------------------
void PrimitiveSet::getFaceIndices(size_t indexOfFace, UIntArray* indices) const
{
CVF_TIGHT_ASSERT(indexOfFace < faceCount());
CVF_TIGHT_ASSERT(indices);
indices->setSizeZero();
if (m_primitiveType == PT_POINTS)
{
indices->reserve(1);
indices->add(index(indexOfFace));
}
else if (m_primitiveType == PT_LINES)
{
indices->reserve(2);
indices->add(index(2*indexOfFace));
indices->add(index(2*indexOfFace + 1));
}
else if (m_primitiveType == PT_LINE_LOOP)
{
indices->reserve(2);
if (indexOfFace == faceCount() - 1)
{
indices->add(index(indexOfFace));
indices->add(index(0));
}
else
{
indices->add(index(indexOfFace));
indices->add(index(indexOfFace + 1));
}
}
else if (m_primitiveType == PT_LINE_STRIP)
{
indices->reserve(2);
indices->add(index(indexOfFace));
indices->add(index(indexOfFace + 1));
}
else if (m_primitiveType == PT_TRIANGLES)
{
indices->reserve(3);
const size_t baseIdx = 3*indexOfFace;
indices->add(index(baseIdx));
indices->add(index(baseIdx + 1));
indices->add(index(baseIdx + 2));
}
else if (m_primitiveType == PT_TRIANGLE_FAN)
{
indices->reserve(3);
indices->add(index(0));
indices->add(index(indexOfFace + 1));
indices->add(index(indexOfFace + 2));
}
else if (m_primitiveType == PT_TRIANGLE_STRIP)
{
indices->reserve(3);
if (indexOfFace % 2 == 0)
{
indices->add(index(indexOfFace));
indices->add(index(indexOfFace + 1));
indices->add(index(indexOfFace + 2));
}
else
{
indices->add(index(indexOfFace + 1));
indices->add(index(indexOfFace));
indices->add(index(indexOfFace + 2));
}
}
else
{
CVF_FAIL_MSG("Not implemented");
}
}
} // namespace cvf