org.j3d.renderer.java3d.util
Class J3DViewFrustum

java.lang.Object
  org.j3d.util.frustum.ViewFrustum
      org.j3d.renderer.java3d.util.J3DViewFrustum

public class J3DViewFrustum

extends ViewFrustum

Java3D-specific implementation of the basic ViewFrustum.

Because Java3D can have multiple canvases that view a single scenegraph, the view frustum must be a bit more complex than the traditional case. It must take into account that every canvas has its own viewplatform, and they may not be looking at the same thing. That means, for culling, they will need to assemble the union of all the spaces for each canvas.

The frustum is for the previous Java3D frame that has just been rendered.

Version:

$Revision: 1.1 $

Author:

Paul Byrne, Justin Couch

Field Summary

Fields inherited from class org.j3d.util.frustum.ViewFrustum

CLIPPED, IN, numCanvases, OUT

Constructor Summary

J3DViewFrustum(javax.media.j3d.Canvas3D canvas)
Create a new instance that operates on just a single canvas.

J3DViewFrustum(javax.media.j3d.Canvas3D[] canvasList)
Creates new ViewFrustum that represents the collection of all canvases.

Method Summary

protected void

getInverseWorldProjection(int id, javax.vecmath.Matrix4d matrix) Request from the renderer-specific canvas the inverse projection matrix for the given canvasId.

Methods inherited from class org.j3d.util.frustum.ViewFrustum

getBounds, isPointInFrustum, isTriangleInFrustum, isTriangleInFrustum, manualPlatformMove, viewingPlatformMoved

Methods inherited from class java.lang.Object

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

Constructor Detail

J3DViewFrustum

public J3DViewFrustum(javax.media.j3d.Canvas3D canvas)

Create a new instance that operates on just a single canvas.

Parameters:

canvas - The canvas to use for this frustum

J3DViewFrustum

public J3DViewFrustum(javax.media.j3d.Canvas3D[] canvasList)

Creates new ViewFrustum that represents the collection of all canvases.

Parameters:

canvasList - The list of canvases to view

Method Detail

getInverseWorldProjection

protected void getInverseWorldProjection(int id,
                                         javax.vecmath.Matrix4d matrix)

Request from the renderer-specific canvas the inverse projection matrix for the given canvasId.

Specified by:

getInverseWorldProjection in class ViewFrustum

Parameters:

id - The ID of the canvas

matrix - The matrix to copy the data into