CShearWarp2VRenderer Class Reference

#include <CShearWarp2VRenderer.h>

Inheritance diagram for CShearWarp2VRenderer:

List of all members.

Public Member Functions
	CShearWarp2VRenderer (CVoxelFieldGrad *pVoxelField, CTransferFunction *pTransferFunction)
virtual	~CShearWarp2VRenderer ()
virtual void	prepare (void)
virtual void	calculate (void)
virtual void	drawScene (void)
virtual void	checkTextureSize (void)
virtual void	setVoxelField (CVoxelFieldGrad *pVoxelField)
virtual void	setTransferFunction (CTransferFunction *pTransferFunction)
virtual void	saveScreenshot (const std::string &sFilename)
Protected Attributes
CClassifiedVoxelFieldRLEPosition	m_oRLE
int	m_iIntermediateTextureSize
int	m_iOutputTextureSize
Vector *	m_pVColor
Vector3DT< unsigned char > *	m_pucTextureData
Vector3DT< unsigned char > *	m_pucTextureData2

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Detailed Description

Shear Warp Renderer

The idea of the shear-warp algorithm is to factorize the view matrix into a shear and a warp transformation. A shear transformation of the original volume data is performed, then this data is projected perpendicular to the sheared planes onto the so called intermediate image. This intermediate image is then warped and we get the final output.

Todo:

rotation according to rotation in raycasting and texture renderers

proportions according to slice thickness

Author:

Johannes Lampel <johannes@lampel.net>

Definition at line 23 of file CShearWarp2VRenderer.h.

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Constructor & Destructor Documentation

CShearWarp2VRenderer::CShearWarp2VRenderer (  CVoxelFieldGrad *  pVoxelField, CTransferFunction *  pTransferFunction )

calls constructor of CClassifiedVoxelFieldRLEPosition Author: Johannes Lampel <johannes@lampel.net> Definition at line 12 of file CShearWarp2VRenderer.cpp. References m_iIntermediateTextureSize.

CShearWarp2VRenderer::~CShearWarp2VRenderer (   )  [virtual]

nothing yet Author: Johannes Lampel <johannes@lampel.net> Definition at line 22 of file CShearWarp2VRenderer.cpp.

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Member Function Documentation

void CShearWarp2VRenderer::calculate (  void   )  [virtual]

calculate the shear warp algorithm Author: Johannes Lampel <johannes@lampel.net> Implements CBaseVRenderer. Definition at line 66 of file CShearWarp2VRenderer.cpp. References imageutils::biLinInterpolate(), Vector3DT< TType >::clamp(), Vector3DT< TType >::cmult(), CMatrix< X, Y, TType >::eye(), CMatrix< X, Y, TType >::get(), CTransferFunctionElem::getAbsorptivity(), CVRendererSceneConfig::getBrightness(), CVoxelField::getDimX(), CVoxelField::getDimY(), CVoxelField::getDimZ(), CVRendererSceneConfig::getDirectionalLightColor(), CTransferFunctionElem::getEmissivity(), CTransferFunctionElem::getGlossiness(), CVoxelFieldGrad::getGradient(), CVoxelFieldGrad::getGradientLength(), CVoxelField::getIndex(), CClassifiedVoxelFieldRLEPosition::getIndexAlong(), CTransferFunctionElem::getMaterialDiffuse(), CTransferFunctionElem::getMaterialSpecular(), CVRendererSceneConfig::getRotationMatrix(), CVoxelField::getSliceThicknessYNormalized(), CVoxelField::getSliceThicknessZNormalized(), CTransferFunction::getTransferFunction(), CMatrix< X, Y, TType >::getTranslate(), CVoxelField::getVoxel(), CBaseVRenderer::getVoxelField(), CMatrix< X, Y, TType >::inverse(), CVRendererSceneConfig::isInPreviewMode(), m_iIntermediateTextureSize, m_iOutputTextureSize, m_oRLE, CClassifiedVoxelFieldRLEPosition::m_ppVuiRLEAlong, CBaseVRenderer::m_pTransferFunction, m_pucTextureData, m_pucTextureData2, m_pVColor, CBaseVRenderer::m_pVoxelField, CBaseVRenderer::m_TTextures, CBaseVRenderer::m_VTransformedDirectionalLightDir, Vector3DT< TType >::normalize(), CBaseVRenderer::notifySceneUpdated(), CMatrix< X, Y, TType >::output(), CBaseVRenderer::sceneConfig(), CMatrix< X, Y, TType >::set(), CMatrix< X, Y, TType >::transpose(), Vector3DT< TType >::x, Vector3DT< TType >::y, Vector3DT< TType >::z, and CMatrix< X, Y, TType >::zero().

void CShearWarp2VRenderer::checkTextureSize (  void   )  [virtual]

checks if the intermediate and output texture size if ok with the voxel data size Author: Johannes Lampel <johannes@lampel.net> Definition at line 872 of file CShearWarp2VRenderer.cpp. References CVoxelField::getDimX(), CVoxelField::getDimY(), CVoxelField::getDimZ(), m_iIntermediateTextureSize, m_iOutputTextureSize, m_pucTextureData, m_pucTextureData2, m_pVColor, and CBaseVRenderer::m_pVoxelField. Referenced by prepare().

void CShearWarp2VRenderer::drawScene (  void   )  [virtual]

draw the output texture on a quad Author: Johannes Lampel <johannes@lampel.net> Implements CBaseVRenderer. Definition at line 777 of file CShearWarp2VRenderer.cpp. References CBaseVRenderer::getScale(), and CBaseVRenderer::m_TTextures.

void CShearWarp2VRenderer::prepare (  void   )  [virtual]

prepares the renderer, allocates memory for textures Author: Johannes Lampel <johannes@lampel.net> Implements CBaseVRenderer. Definition at line 26 of file CShearWarp2VRenderer.cpp. References checkTextureSize(), CClassifiedVoxelFieldRLEPosition::encode(), CTransferFunction::getCount(), CBaseVRenderer::getVoxelField(), CBaseVRenderer::m_iTextures, m_oRLE, CBaseVRenderer::m_pTransferFunction, and CBaseVRenderer::m_TTextures.

void CShearWarp2VRenderer::saveScreenshot (  const std::string &  sFilename  )  [virtual]

saves the output texture to file Author: Johannes Lampel <johannes@lampel.net> Reimplemented from CBaseVRenderer. Definition at line 914 of file CShearWarp2VRenderer.cpp. References m_iOutputTextureSize, m_pucTextureData2, and imageutils::saveScreenshot().

void CShearWarp2VRenderer::setTransferFunction (  CTransferFunction *  pTransferFunction  )  [virtual]

Attaches this renderer instance to another transfer function Parameters: pTransferFunction  TransferFunction to be attached to Author: Johannes Lampel <johannes@lampel.net> Reimplemented from CBaseVRenderer. Definition at line 865 of file CShearWarp2VRenderer.cpp. References m_oRLE, CBaseVRenderer::m_pTransferFunction, and CClassifiedVoxelFieldRLEPosition::setTransferFunction().

void CShearWarp2VRenderer::setVoxelField (  CVoxelFieldGrad *  pVoxelField  )  [virtual]

Attaches this renderer instance to another voxel field. Parameters: pVoxelField  Voxelfield to be attached to Author: Johannes Lampel <johannes@lampel.net> Reimplemented from CBaseVRenderer. Definition at line 858 of file CShearWarp2VRenderer.cpp. References m_oRLE, CClassifiedVoxelFieldRLEPosition::setVoxelField(), and CBaseVRenderer::setVoxelField().

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Member Data Documentation

int CShearWarp2VRenderer::m_iIntermediateTextureSize [protected]

Size of intermediate texture Definition at line 102 of file CShearWarp2VRenderer.h. Referenced by calculate(), checkTextureSize(), and CShearWarp2VRenderer().

int CShearWarp2VRenderer::m_iOutputTextureSize [protected]

Size of output texture Definition at line 106 of file CShearWarp2VRenderer.h. Referenced by calculate(), checkTextureSize(), and saveScreenshot().

CClassifiedVoxelFieldRLEPosition CShearWarp2VRenderer::m_oRLE [protected]

the RLE encoded voxel field Definition at line 97 of file CShearWarp2VRenderer.h. Referenced by calculate(), prepare(), setTransferFunction(), and setVoxelField().

Vector3DT<unsigned char>* CShearWarp2VRenderer::m_pucTextureData [protected]

the intermediate texture data Definition at line 115 of file CShearWarp2VRenderer.h. Referenced by calculate(), and checkTextureSize().

Vector3DT<unsigned char>* CShearWarp2VRenderer::m_pucTextureData2 [protected]

the warped texture data Definition at line 119 of file CShearWarp2VRenderer.h. Referenced by calculate(), checkTextureSize(), and saveScreenshot().

Vector* CShearWarp2VRenderer::m_pVColor [protected]

temporary texture, for summing we need floats Definition at line 111 of file CShearWarp2VRenderer.h. Referenced by calculate(), and checkTextureSize().

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The documentation for this class was generated from the following files:

• /home/tobias/temp/vvis/src/render/CShearWarp2VRenderer.h
• /home/tobias/temp/vvis/src/render/CShearWarp2VRenderer.cpp

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