Package gov.nih.mipav.view.renderer.WildMagic.Render

Class VolumeCalcEffect

java.lang.Object

WildMagic.LibGraphics.ObjectSystem.GraphicsObject

WildMagic.LibGraphics.Effects.Effect

WildMagic.LibGraphics.Effects.ShaderEffect

gov.nih.mipav.view.renderer.WildMagic.Render.VolumeClipEffect

gov.nih.mipav.view.renderer.WildMagic.Render.VolumeCalcEffect

All Implemented Interfaces:

java.io.Serializable, WildMagic.LibGraphics.ObjectSystem.NameIdInterface, WildMagic.LibGraphics.ObjectSystem.StreamInterface

public class VolumeCalcEffect
extends VolumeClipEffect
implements WildMagic.LibGraphics.ObjectSystem.StreamInterface

ShaderEffect class for calculating the volume normals on the GPU. The volume normals are calculated in two passes with two different shaders. The shader code is based on the normal calculation function in RenderViewBase.java. The first pass calculates the fDX, fDY, and fDZ values for the voxels. The second pass calculates the normals as the average of the current voxel normal with it's 6 axis-aligned neighbors. All calculations are done on the GPU, the textures remain on the GPU and are not copied into system memory. After both passes are complete, the texture containing the normals is accessible through the VolumeImage.GetNormalMapTarget() Texture. The VolumeImageViewer class applies the VolumeCalcEffect and maps the output textures to the VolumeImage object normal map texture.

See Also:

RenderViewBase.java, VolumeImageViewer.java, Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private float[]	m_afMinMax	stores the gradient magnitude filter on/off value:
private boolean	m_bIsColor	When true the volume data is color.
private static long	serialVersionUID

Fields inherited from class gov.nih.mipav.view.renderer.WildMagic.Render.VolumeClipEffect

CLIP_A, CLIP_A_INV, CLIP_EYE, CLIP_EYE_INV, CLIP_X, CLIP_X_INV, CLIP_Y, CLIP_Y_INV, CLIP_Z, CLIP_Z_INV, m_aafClipData, m_afClipAll, m_afClipOBBAxis0, m_afClipOBBAxis1, m_afClipOBBAxis2, m_afClipOBBExtent, m_afClipSphereCenter, m_afClipSphereScale, m_afDoClip, m_afVolumeMatrix, m_bClipOBB, m_bClipSphere, MAX_CLIP_PLANES

Fields inherited from class WildMagic.LibGraphics.Effects.ShaderEffect

m_iPassQuantity, m_kAlphaState, m_kCompiledPrograms, m_kPShader, m_kVShader

Constructor Summary

Constructors

Constructor	Description
VolumeCalcEffect(VolumeImage kVolumeImage, VolumeClipEffect kClip)	For creating the surface mask texture.
VolumeCalcEffect(VolumeImage kVolumeImage, VolumeClipEffect kClip, boolean bGM)	For creating the surface mask texture.
VolumeCalcEffect(VolumeImage kVolumeImage, WildMagic.LibGraphics.Rendering.Texture kTexture)	Create a new VolumeCalcEffect shader with the VolumeImage data.

Method Summary

Modifier and Type	Method	Description
void	dispose()	memory cleanup.
void	OnLoadPrograms(int iPass, WildMagic.LibGraphics.Shaders.Program pkVProgram, WildMagic.LibGraphics.Shaders.Program pkPProgram, WildMagic.LibGraphics.Shaders.Program pkCProgram)
void	SetIsoVal(float fVal)
void	SetStepSize(float fX, float fY, float fZ)	Sets the step size shader parameter.
void	SetStepSize(VolumeImage kVolumeImage)	Sets the step size shader parameter.
void	SetVolumeIndex(int iIndex)

Methods inherited from class gov.nih.mipav.view.renderer.WildMagic.Render.VolumeClipEffect

getClip, getClipArb, getClipArbInv, getClipEnable, getClipEye, getClipEyeInv, getClipInv, getClipInvEnable, isClip, isClipAE, isClipOBB, isClipSphere, ResetClip, SetClip, SetClipArb, SetClipArbInv, SetClipEye, SetClipEyeInv, SetClipOBB, SetClipSphere, setVolumeMatrix

Methods inherited from class WildMagic.LibGraphics.Effects.ShaderEffect

GetAllObjectsByName, GetBlending, GetCProgram, GetDiskUsed, GetObjectByID, GetObjectByName, GetPassQuantity, GetPProgram, GetSamplerInformation, GetTexture, GetTexture, GetTextureQuantity, GetVProgram, Link, Load, LoadPrograms, LoadResources, OnReleasePrograms, Register, ReleasePrograms, ReleaseResources, RestoreGlobalState, Save, SaveStrings, SetCProgram, SetDefaultAlphaState, SetGlobalState, SetPassQuantity, SetPShader, SetVShader

Methods inherited from class WildMagic.LibGraphics.Effects.Effect

Draw

Methods inherited from class WildMagic.LibGraphics.ObjectSystem.GraphicsObject

GetID, GetName, GetNextID, GetObjectByIDBase, GetObjectByNameBase, SetName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface WildMagic.LibGraphics.ObjectSystem.StreamInterface

GetDiskUsed, Link, Load, Register, Save, SaveStrings

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

m_bIsColor

private boolean m_bIsColor

When true the volume data is color.

m_afMinMax

private float[] m_afMinMax

stores the gradient magnitude filter on/off value:

Constructor Detail

VolumeCalcEffect

public VolumeCalcEffect(VolumeImage kVolumeImage,
                        WildMagic.LibGraphics.Rendering.Texture kTexture)

Create a new VolumeCalcEffect shader with the VolumeImage data. This fn creates the first-pass shader.

Parameters:

kVolumeImageA - the shared volume data and textures.

VolumeCalcEffect

public VolumeCalcEffect(VolumeImage kVolumeImage,
                        VolumeClipEffect kClip)

For creating the surface mask texture.

Parameters:

kVolumeImage - Volume data

kClip - current clipping state.

VolumeCalcEffect

public VolumeCalcEffect(VolumeImage kVolumeImage,
                        VolumeClipEffect kClip,
                        boolean bGM)

For creating the surface mask texture.

Parameters:

kVolumeImage - Volume data

kClip - current clipping state.

Method Detail

dispose

public void dispose()

memory cleanup.

Overrides:

dispose in class VolumeClipEffect

OnLoadPrograms

public void OnLoadPrograms(int iPass,
                           WildMagic.LibGraphics.Shaders.Program pkVProgram,
                           WildMagic.LibGraphics.Shaders.Program pkPProgram,
                           WildMagic.LibGraphics.Shaders.Program pkCProgram)

Overrides:

OnLoadPrograms in class VolumeClipEffect

SetIsoVal

public void SetIsoVal(float fVal)

SetStepSize

public void SetStepSize(float fX,
                        float fY,
                        float fZ)

Sets the step size shader parameter.

Parameters:

kVolumeImage - the shared volume data and textures.

SetStepSize

public void SetStepSize(VolumeImage kVolumeImage)

Sets the step size shader parameter.

Parameters:

kVolumeImage - the shared volume data and textures.

SetVolumeIndex

public void SetVolumeIndex(int iIndex)