VolumeJ
Class VJViewspaceRender

java.lang.Object
  |
  +--java.lang.Thread
        |
        +--VolumeJ.VJRenderer
              |
              +--VolumeJ.VJViewspaceRender

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

FlowJScintillansRender

public class VJViewspaceRender

extends VJRenderer

VJViewspaceRender class. Implements viewspace rendering, where the volume is rendered in the order of the pixels on the viewport. So for the whole viewport, rays are cast into the volume for one k-step, and in the next step, the rays are advanced by one k-step. This class implements polymorphic viewspace-ordered volume rendering. Copyright (c) 1999-2002, Michael Abramoff. All rights reserved.

Field Summary

protected static float[]	osv
protected int	pixelSize size of entry viewspacePixel.
protected VJVoxelLoc[]	viewspace The viewspace buffer contains the x, y, z, and the interpolation coefficients steps for the next.
protected VJAlphaColor[]	viewspacePixel The viewspace pixel buffer contains the rgb composites and the alpha for all pixels.
protected static float[]	vsv
protected static float[]	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

VJViewspaceRender(VJInterpolator interpolator, VJShader shader, VJClassifier classifier)
Create a new viewspace renderer with specified methods.

Method Summary

protected void	blendCompose(int index, VJValue value, VJGradient g, VJAlphaColor color, VJShade shade) Compose the classified voxel color into pixel.
static java.lang.String	desc()
void	run() Viewspace rendering.

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

Field Detail

viewspacePixel

protected VJAlphaColor[] viewspacePixel

The viewspace pixel buffer contains the rgb composites and the alpha for all pixels.

viewspace

protected VJVoxelLoc[] viewspace

The viewspace buffer contains the x, y, z, and the interpolation coefficients steps for the next.

pixelSize

protected int pixelSize

size of entry viewspacePixel.

vsv

protected static float[] vsv

vsvstep

protected static float[] vsvstep

osv

protected static float[] osv

Constructor Detail

VJViewspaceRender

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

Create a new viewspace renderer with specified methods.

Parameters:

interpolator - the interpolator that will interpolate VJValues from the voluem to be rendered.

shader - the VJShader that will be used for shading.

classifier - the VJClassifier that will be used for classifying.

Throws:

java.lang.Exception - if parameters not properly defined.

Method Detail

run

public void run()

Viewspace rendering. Render v into a pixel array. The type of pixel array depends on the value of pixelSize (grayscale or RGB). This is a general renderer. It can process interpolated voxels of type Object, and these voxels are passed to a classifier and a composer. Of course, interpolator, classifier and composer will need to be able to produce and process the needed type of Object. Thus, voxels can be scalars, indexed scalars (implemented here), or vectors, such as RGB (implemented here) or flow vectors.

Overrides:

run in class VJRenderer

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.

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.

desc

public static java.lang.String desc()