org.jzy3d.plot3d.primitives.axes
Class FeedbackBufferAxeBox

java.lang.Object
  org.jzy3d.plot3d.primitives.axes.AxeBox
      org.jzy3d.plot3d.primitives.axes.FeedbackBufferAxeBox

All Implemented Interfaces:

IAxe

public class FeedbackBufferAxeBox
extends AxeBox
implements IAxe

This AxeBox implementation was the first to appear in Jzy3d. It computes hidden faces using the OpenGL feedback buffer, which seems to fail on some hardware (especially Lenovo notepads). The parent AxeBox doesn't rely anymore one feedback buffer, and this implementation has been kept in order to provide an example of feedback buffer use.

Author:

Martin Pernollet

See Also:

http://code.google.com/p/jzy3d/issues/detail?id=10

Field Summary

Fields inherited from class org.jzy3d.plot3d.primitives.axes.AxeBox

AXE_X, AXE_Y, AXE_Z, axeXquads, axeXx, axeXy, axeXz, axeYquads, axeYx, axeYy, axeYz, axeZquads, axeZx, axeZy, axeZz, boxBounds, center, layout, normx, normy, normz, PRECISION, quadIsHidden, quadx, quady, quadz, scale, txt, view, wholeBounds, xrange, yrange, zrange

Constructor Summary

FeedbackBufferAxeBox(BoundingBox3d bbox)

FeedbackBufferAxeBox(BoundingBox3d bbox, IAxeLayout layout)

Method Summary

void	draw(javax.media.opengl.GL gl, javax.media.opengl.glu.GLU glu, Camera camera) Draws the AxeBox.
protected void	drawCube(javax.media.opengl.GL gl, int mode) Make all GL calls allowing to build a cube with 6 separate quads.
protected boolean[]	getEmptyTokens(int ntokens, float[] buffer, int size) This utility function inform wether a GL_PASS_THROUGH_TOKEN was followed by other OpenGL tokens (GL_POLYGON_TOKEN, GL_LINE_TOKEN, etc), or not.
protected boolean[]	getHiddenQuads(javax.media.opengl.GL gl) COMPUTATION OF HIDDEN QUADS
protected int	print3DcolorVertex(int size, int count, float[] buffer) Print out parameters of a gl call in 3dColor mode.
protected void	printHiddenQuads() Print out display status of quads.

Methods inherited from class org.jzy3d.plot3d.primitives.axes.AxeBox

dispose, drawGridOnQuad, drawTicks, drawTicks, findClosestXaxe, findClosestYaxe, findClosestZaxe, getBoxBounds, getCenter, getHiddenQuads, getLayout, getTextRenderer, getView, getWholeBounds, init, min, setAxe, setAxeBox, setScale, setTextRenderer, setView

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jzy3d.plot3d.primitives.axes.IAxe

dispose, getBoxBounds, getCenter, getLayout, setAxe, setScale

Constructor Detail

FeedbackBufferAxeBox

public FeedbackBufferAxeBox(BoundingBox3d bbox)

FeedbackBufferAxeBox

public FeedbackBufferAxeBox(BoundingBox3d bbox,
                            IAxeLayout layout)

Method Detail

draw

public void draw(javax.media.opengl.GL gl,
                 javax.media.opengl.glu.GLU glu,
                 Camera camera)

Description copied from class: AxeBox

Draws the AxeBox. The camera is used to determine which axis is closest to the ur point ov view, in order to decide for an axis on which to diplay the tick values.

Specified by:

draw in interface IAxe

Overrides:

draw in class AxeBox

drawCube

protected void drawCube(javax.media.opengl.GL gl,
                        int mode)

Make all GL calls allowing to build a cube with 6 separate quads. Each quad is indexed from 0.0f to 5.0f using glPassThrough, and may be traced in feedback mode when mode=GL.GL_FEEDBACK

Overrides:

drawCube in class AxeBox

getHiddenQuads

protected boolean[] getHiddenQuads(javax.media.opengl.GL gl)

COMPUTATION OF HIDDEN QUADS

getEmptyTokens

protected boolean[] getEmptyTokens(int ntokens,
                                   float[] buffer,
                                   int size)

This utility function inform wether a GL_PASS_THROUGH_TOKEN was followed by other OpenGL tokens (GL_POLYGON_TOKEN, GL_LINE_TOKEN, etc), or not. In the first case, the given token is considered as non empty, in the other case, it is considered as empty. The expected use of this function is to inform the user wether a polygon has been displayed or not in the case Culling was activated. Note: this function is only intended to work in the case where gl.glFeedbackBuffer is called with GL.GL_3D_COLOR as second argument, i.e. vertices are made of x, y, z, alpha values and a color. Thus, no texture may be used, and trying to parse a GL_BITMAP_TOKEN, GL_DRAW_PIXEL_TOKEN, or GL_COPY_PIXEL_TOKEN will throw a RuntimeException. Note: this function only works with PASS_THROUGH_TOKEN with a positive integer value, since this value will be used as an index in the boolean array returned by the function TODO: use a map to associate a float token to a polygon with an id?

Throws:

a - RuntimeException if a parsed token is either GL_BITMAP_TOKEN, GL_DRAW_PIXEL_TOKEN, or GL_COPY_PIXEL_TOKEN.

print3DcolorVertex

protected int print3DcolorVertex(int size,
                                 int count,
                                 float[] buffer)

Print out parameters of a gl call in 3dColor mode.

Overrides:

print3DcolorVertex in class AxeBox

printHiddenQuads

protected void printHiddenQuads()

Print out display status of quads.

Overrides:

printHiddenQuads in class AxeBox