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

Class TriangleClassificationWidget

java.lang.Object

gov.nih.mipav.view.renderer.WildMagic.Render.MultiDimensionalTransfer.ClassificationWidget

gov.nih.mipav.view.renderer.WildMagic.Render.MultiDimensionalTransfer.TriangleClassificationWidget

All Implemented Interfaces:

java.io.Serializable

public class TriangleClassificationWidget
extends ClassificationWidget

This class implements a 2D Triangle-shaped ClassficiationWidget. The code implements the rendering of the widget in the 2D Multi-histogram panel, as well as the user mouse-interaction with the widget. The parameters that define the widget are then passed to the Volume Renderer GLSL shader program and determine how the Volume is displayed. *

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
private float	m_fCenterX	Current parameterized coordinates for the center control point in X (used to maintain relative position when resizing the widget).
private float	m_fCenterY	Current parameterized coordinates for the center control point in Y (used to maintain relative position when resizing the widget).
protected WildMagic.LibGraphics.SceneGraph.TriMesh	m_kLeftSphere
private static long	serialVersionUID

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

BOTTOM_EDGE, LEFT_EDGE, m_iHeight, m_iWidth, m_kLowerSphere, m_kMiddleSphere, m_kMouseOffset, m_kOutline, m_kPicked, m_kTMax, m_kTMin, m_kUpperSphere, m_kWidget, m_kWidgetEfect, m_kWidgetMesh, m_kWidgetState, RIGHT_EDGE, SPHERE_RADIUS, TOP_EDGE

Constructor Summary

Constructors

Constructor	Description
TriangleClassificationWidget(int iX, int iY, WildMagic.LibFoundation.Mathematics.Vector2f kTMin, WildMagic.LibFoundation.Mathematics.Vector2f kTMax, WildMagic.LibGraphics.Rendering.Texture kTexture, int iWidth, int iHeight)

Method Summary

Modifier and Type	Method	Description
protected float	areaTwice(float ptAx, float ptAy, float ptBx, float ptBy, float ptCx, float ptCy)	Determines which side of the line a point lies on, used for determining if a point is inside or outside a closed loop.
private WildMagic.LibFoundation.Mathematics.Vector3f	computeIntersect(WildMagic.LibFoundation.Mathematics.Vector3f p0, WildMagic.LibFoundation.Mathematics.Vector3f v0, WildMagic.LibFoundation.Mathematics.Vector3f p1, WildMagic.LibFoundation.Mathematics.Vector3f v1, boolean onLine)	Computes the intersection between two lines.
protected void	CreateTriangle(int iX, int iY, WildMagic.LibGraphics.Rendering.Texture kTexture)	Creates the triangle widget and control points:
private boolean	insideTri(float fX, float fY)	Determines if the input position is inside the triangle widget.
boolean	Pick(WildMagic.LibGraphics.Rendering.Renderer kRenderer, int iX, int iY)	Abstract picking.
void	processMouseDrag(int iX0ld, int iYOld, int iButton, int iX, int iY)
private void	readObject(java.io.ObjectInputStream in)	Read this object from disk.
protected void	ScaleTriangle(int iX, int iY, int position, WildMagic.LibGraphics.SceneGraph.TriMesh sphere)	Resizes the triangle using the lower-control point:
void	setPicked(boolean bPicked)	Clears or sets the current picked object, sets the outline color to red when picked, blue when not selected.
void	setTexture(WildMagic.LibGraphics.Rendering.Texture kTexture)	Sets the histogram Texture map for the widget shader effect.
void	ShiftMidTriangle(int iX, int iY)	Move the middle-control point which controls the transfer function in the triangle:
protected void	ShiftTriangle(int iX, int iY)	Shifts the triangle along the bottom edge of the 2D Histogram, using the bottom control-point.
private void	updateCenterXY(float fX, float fY)
void	updateDisplay()	Updates the ShaderEffect parameters for this widget.
private void	writeObject(java.io.ObjectOutputStream out)	Stream this object to disk.

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

calcObjX, calcObjY, calcScreenX, calcScreenY, calcTCoordX, calcTCoordY, clearPicked, dispose, getCenter, getColor, getLUTIndex, getSavedWidgetState, getState, getType, getWidget, Pick, setAlpha, setBoundary, setColor, setLUT, setState

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

m_fCenterX

private float m_fCenterX

Current parameterized coordinates for the center control point in X (used to maintain relative position when resizing the widget).

m_fCenterY

private float m_fCenterY

Current parameterized coordinates for the center control point in Y (used to maintain relative position when resizing the widget).

m_kLeftSphere

protected WildMagic.LibGraphics.SceneGraph.TriMesh m_kLeftSphere

Constructor Detail

TriangleClassificationWidget

public TriangleClassificationWidget(int iX,
                                    int iY,
                                    WildMagic.LibFoundation.Mathematics.Vector2f kTMin,
                                    WildMagic.LibFoundation.Mathematics.Vector2f kTMax,
                                    WildMagic.LibGraphics.Rendering.Texture kTexture,
                                    int iWidth,
                                    int iHeight)

Parameters:

iX - location in MouseEvent Coordinates.

iY - location in MouseEvent Coordinates.

kTMin - minimum texture coordinates for the 2D histogram, used for the image background. (Defaults 0-1)

kTMax - maximum texture coordinates for the 2D histogram, used for the image background. (Defaults 0-1)

kTexName - 2D Histogram texture name.

iWidth - canvas width (default 256)

iHeight - canvas height (default 256)

Method Detail

Pick

public boolean Pick(WildMagic.LibGraphics.Rendering.Renderer kRenderer,
                    int iX,
                    int iY)

Description copied from class: ClassificationWidget

Abstract picking. Returns true if this widget, or one of it's control points was picked.

Specified by:

Pick in class ClassificationWidget

iX - current mouse x position (MouseEvent coordinates).

iY - current mouse y position (MouseEvent coordinates).

Returns:

true if this widget or one of it's control points was picked.

processMouseDrag

public void processMouseDrag(int iX0ld,
                             int iYOld,
                             int iButton,
                             int iX,
                             int iY)

Specified by:

processMouseDrag in class ClassificationWidget

Parameters:

iX0ld - old mouse x-position in MouseEvent coordinates.

iYOld - old mouse y-position in MouseEvent coordinates.

iButton - old mouse button.

setPicked

public void setPicked(boolean bPicked)

Clears or sets the current picked object, sets the outline color to red when picked, blue when not selected.

Overrides:

setPicked in class ClassificationWidget

Parameters:

bPicked - when true the widget is selected.

setTexture

public void setTexture(WildMagic.LibGraphics.Rendering.Texture kTexture)

Description copied from class: ClassificationWidget

Sets the histogram Texture map for the widget shader effect.

Specified by:

setTexture in class ClassificationWidget

ShiftMidTriangle

public void ShiftMidTriangle(int iX,
                             int iY)

Move the middle-control point which controls the transfer function in the triangle:

Parameters:

e - MouseEvent

updateCenterXY

private void updateCenterXY(float fX,
                            float fY)

updateDisplay

public void updateDisplay()

Description copied from class: ClassificationWidget

Updates the ShaderEffect parameters for this widget.

Specified by:

updateDisplay in class ClassificationWidget

areaTwice

protected float areaTwice(float ptAx,
                          float ptAy,
                          float ptBx,
                          float ptBy,
                          float ptCx,
                          float ptCy)

Determines which side of the line a point lies on, used for determining if a point is inside or outside a closed loop.

Parameters:

ptAx -

ptAy -

ptBx -

ptBy -

ptCx -

ptCy -

Returns:

CreateTriangle

protected void CreateTriangle(int iX,
                              int iY,
                              WildMagic.LibGraphics.Rendering.Texture kTexture)

Creates the triangle widget and control points:

Parameters:

iX - mouse x-position in MouseEvent coordinates.

iY - mouse y-position in MouseEvent coordinates.

kTexName - 2D Histogram texture name.

ScaleTriangle

protected void ScaleTriangle(int iX,
                             int iY,
                             int position,
                             WildMagic.LibGraphics.SceneGraph.TriMesh sphere)

Resizes the triangle using the lower-control point:

Parameters:

e - MouseEvent

ShiftTriangle

protected void ShiftTriangle(int iX,
                             int iY)

Shifts the triangle along the bottom edge of the 2D Histogram, using the bottom control-point. Shift only moves the triangle to the left or right, not up or down.

Parameters:

e - MouseEvent

computeIntersect

private WildMagic.LibFoundation.Mathematics.Vector3f computeIntersect(WildMagic.LibFoundation.Mathematics.Vector3f p0,
                                                                      WildMagic.LibFoundation.Mathematics.Vector3f v0,
                                                                      WildMagic.LibFoundation.Mathematics.Vector3f p1,
                                                                      WildMagic.LibFoundation.Mathematics.Vector3f v1,
                                                                      boolean onLine)

Computes the intersection between two lines.

Parameters:

p0 - starting position of line 0.

v0 - line 0 direction vector.

p1 - starting position of line 1.

v1 - line 1 direction vector.

Returns:

intersection point.

insideTri

private boolean insideTri(float fX,
                          float fY)

Determines if the input position is inside the triangle widget.

Parameters:

fX - x-position.

fY - y-position.

Returns:

true if inside the triangle, false otherwise.

readObject

private void readObject(java.io.ObjectInputStream in)
                 throws java.io.IOException,
                        java.lang.ClassNotFoundException

Read this object from disk.

Parameters:

in -

Throws:

java.io.IOException

java.lang.ClassNotFoundException

writeObject

private void writeObject(java.io.ObjectOutputStream out)
                  throws java.io.IOException

Stream this object to disk.

Parameters:

out -

Throws:

java.io.IOException