of3d
Class FlowJScintillansRender

java.lang.Object
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  +--java.lang.Thread
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        +--VolumeJ.VJRenderer
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              +--VolumeJ.VJViewspaceRender
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                    +--of3d.FlowJScintillansRender

All Implemented Interfaces:

java.lang.Runnable

public class FlowJScintillansRender

extends VJViewspaceRender

FlowJScintillansRender. Implements viewspace rendering for flow volumes in combination with regular static volumes. Flow volumes are displayed as scintillations, i.e small colored streaks with a direction and halo, coding for magnitude direction of the flow vector. Since scintillations are 'splatted' onto the viewport because they extend beyond the voxel they are located at, rendering has to proceed in viewspace order, i.e, first i, then j and then k (regular renders follow the ray all the way top termination) while here an array of rays is advanced one step at a time (thus allowing splatting). This class leans heavily on VJViewspaceRender Copyright (c) 1999-2002, Michael Abramoff. All rights reserved.

Fields inherited from class VolumeJ.VJViewspaceRender

osv, pixelSize, viewspace, viewspacePixel, vsv, vsvstep

Fields inherited from class VolumeJ.VJRenderer

classifier, COLORINT, cutout, depth, description, doDepthCueing, doPerspective, doPixeltracing, GRAYBYTE, height, interpolator, ioffset, joffset, koffset, m, message, mi, miLight, mLight, outputType, pixelms, pixels, running, sequenceNumber, shader, tracei, tracej, traceString, v, width

Fields inherited from class java.lang.Thread

inheritableThreadLocals, MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY, threadLocals

Constructor Summary

FlowJScintillansRender(VJInterpolator interpolator, VJShader shader, VJClassifier classifier)

Method Summary

protected void	blendCompose(int index, VJValue value, VJGradient g, VJAlphaColor color, VJShade shade) Compose the classified voxel color into pixel.
protected void	blendComposeVector(int index, FlowJValue value, VJGradient g, VJAlphaColor color, VJShade shade) Scintillans rendering shows (a subset of) the vectors as halved, small colored elongated oriented Gaussian stretches (scintillations).

Methods inherited from class VolumeJ.VJViewspaceRender

desc, run

Methods inherited from class VolumeJ.VJRenderer

defaultViewport, getClassifier, getInterpolator, getPixels, getShader, getTimePerPixel, getTransformation, getViewport, getViewportHeight, getViewportWidth, getVolume, kill, minmax, newViewportBuffer, onTrace, setClassifier, setCutout, setDescription, setInterpolator, setMessage, setOutputColor, setOutputGrayscale, setPixel, setPixel, setSequenceNumber, setShader, setTransformation, setTransformation, setViewport, setVolume, trace, trace, traceWrite

Methods inherited from class java.lang.Thread

, activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Constructor Detail

FlowJScintillansRender

public FlowJScintillansRender(VJInterpolator interpolator,
                              VJShader shader,
                              VJClassifier classifier)
                       throws java.lang.Exception

Method Detail

blendCompose

protected void blendCompose(int index,
                            VJValue value,
                            VJGradient g,
                            VJAlphaColor color,
                            VJShade shade)

Compose the classified voxel color into pixel. Link to VJAlphaColor.blendComposeScalar() so that this method can be overloaded.

Overrides:

blendCompose in class VJViewspaceRender

Parameters:

index - the index of the current composited pixel (so far).

value - the voxel VJValue for the current voxel (needed by some subclasses).

g - the interpolated gradient for shading

color - contains the alpha value and the color (grayscale or RGB) of the classified values.

shade - is the effect of shading.

blendComposeVector

protected void blendComposeVector(int index,
                                  FlowJValue value,
                                  VJGradient g,
                                  VJAlphaColor color,
                                  VJShade shade)

Scintillans rendering shows (a subset of) the vectors as halved, small colored elongated oriented Gaussian stretches (scintillations). These scintillations emit their own light and are not shaded. Front to back alpha blending compositing.