edu.ohiou.cs456_badabing.sceneapi.basic
Class ANode

java.lang.Object
  edu.ohiou.cs456_badabing.sceneapi.basic.ANode

Direct Known Subclasses:

LightNode, Map, MaterialGroupNode, ModelNode, PieChart, Sphere

public class ANode
extends java.lang.Object

Super class for all other nodes in the tree.

Description: Super class for all other nodes in the tree.

Copyright: Lev A Neiman 2008

Company: Ohio University EECS

Field Summary

protected java.util.LinkedList	children References to the children nodes.
protected int	display_list if this does not equal to -1 then it refers to some Display List in memory.
protected java.lang.String	name prbl should make this private later on if i still use it.
protected static int	no_disp_list if display_list == -1 then we know it can't refer to valid OpenGL display list, since they cannot be negative.
protected ANode	parent reference to the parent node.
protected boolean	ppop if this is true, then modelview matrix is not pushed and poped around rendering this node.
protected Coordinate	rotation what is the vector about which this node is rotated, relative to its parent?
float	rotation_angle what is the angle of rotation about that vector?
protected Coordinate	scale how big is this node compared to its parent? 1.0 is same size.
boolean	show
protected Coordinate	translation how far away is this node from its parent?

Constructor Summary

ANode()
default constructor

ANode(int list)
constructor

ANode(java.lang.String name)
constructor

Method Summary

void	addChild(ANode child) add child to this node.
static int	countNodes(ANode root) counts the number of nodes in the tree with root as root.
private static int	countNodes(ANode root, int count) counts the number of nodes in the tree with root as root.
static void	drawCube(GLAutoDrawable g) renders a simple cube.
java.lang.String	getName()
static Coordinate	getNormal(Coordinate a, Coordinate b, Coordinate c) computes a normal between (a-c)x(b-c)
static void	hideTree(ANode root)
private void	init() initializes member variables to their default values.
boolean	pushPop()
void	render(GLAutoDrawable g) This method should be typically called from render in all derived classes.
static void	renderTree(GLAutoDrawable contex, ANode root) This static function renders the tree with root as the root.
Coordinate	rotation()
Coordinate	scale()
void	setName(java.lang.String name)
void	setParent(ANode parent) set parent on this node.
void	setPushPop(boolean a)
static void	showTree(ANode root)
Coordinate	translation() returns translation

Methods inherited from class java.lang.Object

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

Field Detail

translation

protected Coordinate translation

how far away is this node from its parent?

scale

protected Coordinate scale

how big is this node compared to its parent? 1.0 is same size.

rotation

protected Coordinate rotation

what is the vector about which this node is rotated, relative to its parent?

rotation_angle

public float rotation_angle

what is the angle of rotation about that vector?

no_disp_list

protected static final int no_disp_list

if display_list == -1 then we know it can't refer to valid OpenGL display list, since they cannot be negative.

See Also:

Constant Field Values

display_list

protected int display_list

if this does not equal to -1 then it refers to some Display List in memory.

ppop

protected boolean ppop

if this is true, then modelview matrix is not pushed and poped around rendering this node.

name

protected java.lang.String name

prbl should make this private later on if i still use it.

children

protected java.util.LinkedList children

References to the children nodes. Uses Java's LinkedList data structure.

parent

protected ANode parent

reference to the parent node.

show

public boolean show

Constructor Detail

ANode

public ANode()

default constructor

ANode

public ANode(java.lang.String name)

constructor

Parameters:

name - String - name for this node.

ANode

public ANode(int list)

constructor

Parameters:

list - int - display list that this node will call.

Method Detail

translation

public Coordinate translation()

returns translation

Returns:

Coordinate

scale

public Coordinate scale()

rotation

public Coordinate rotation()

getName

public java.lang.String getName()

setName

public void setName(java.lang.String name)

init

private void init()

initializes member variables to their default values.

addChild

public void addChild(ANode child)

add child to this node.

Parameters:

child - ANode

setParent

public void setParent(ANode parent)

set parent on this node.

Parameters:

parent - ANode

render

public void render(GLAutoDrawable g)

This method should be typically called from render in all derived classes. This one just modifies the current ModelView matrix by this node's offset, rotation and scale.

Parameters:

g - GLAutoDrawable

hideTree

public static void hideTree(ANode root)

showTree

public static void showTree(ANode root)

renderTree

public static void renderTree(GLAutoDrawable contex,
                              ANode root)

This static function renders the tree with root as the root.

Parameters:

contex - GLAutoDrawable

root - ANode

countNodes

public static int countNodes(ANode root)

counts the number of nodes in the tree with root as root.

Parameters:

root - ANode - root to the tree to count nodes of.

Returns:

int - number of nodes in root.

countNodes

private static int countNodes(ANode root,
                              int count)

counts the number of nodes in the tree with root as root.

Parameters:

root - ANode - root to the tree to count nodes of.

count - int - current count.

Returns:

int - number of nodes in root.

pushPop

public boolean pushPop()

setPushPop

public void setPushPop(boolean a)

getNormal

public static Coordinate getNormal(Coordinate a,
                                   Coordinate b,
                                   Coordinate c)

computes a normal between (a-c)x(b-c)

Parameters:

a - Coordinate

b - Coordinate

c - Coordinate

Returns:

Coordinate

drawCube

public static void drawCube(GLAutoDrawable g)

renders a simple cube.

Parameters:

g - GLAutoDrawable