com.threerings.opengl.geometry
Class DynamicGeometry

java.lang.Object
  com.threerings.opengl.geometry.Geometry
      com.threerings.opengl.geometry.DynamicGeometry

Direct Known Subclasses:

ParticleGeometry

public abstract class DynamicGeometry
extends Geometry

Base class for dynamic geometry.

Field Summary

protected BufferObject	_arrayBuffer The VBO, if we're using one.
protected float[]	_data The vertex data.
protected FloatBuffer	_floatArray The float array.
protected static FloatBuffer	_scratchBuffer The shared scratch buffer used to hold vertex data before copying to the VBO.

Fields inherited from class com.threerings.opengl.geometry.Geometry

EMPTY

Constructor Summary

protected	DynamicGeometry() Constructor for subclasses.
	DynamicGeometry(float[] data, BufferObject arrayBuffer) Creates a new dynamic geometry that will draw from a VBO.
	DynamicGeometry(float[] data, BufferObject arrayBuffer, FloatBuffer floatArray) Creates a new dynamic geometry.
	DynamicGeometry(float[] data, FloatBuffer floatArray) Creates a new dynamic geometry that will draw directly from a float buffer.

Method Summary

protected static FloatBuffer	getScratchBuffer(int size) Returns a reference to the scratch buffer, (re)creating it if necessary to provide the supplied size.
boolean	requiresUpdate() Checks whether this geometry requires a call to its Geometry.update() method before rendering.
void	update() Updates the state of the geometry.
protected abstract void	updateData() Updates the vertex data.

Methods inherited from class com.threerings.opengl.geometry.Geometry

getArrayState, getBoneMatrices, getCenter, getCoordSpace, getDrawCommand

Methods inherited from class java.lang.Object

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

Field Detail

_data

protected float[] _data

The vertex data.

_arrayBuffer

protected BufferObject _arrayBuffer

The VBO, if we're using one.

_floatArray

protected FloatBuffer _floatArray

The float array.

_scratchBuffer

protected static FloatBuffer _scratchBuffer

The shared scratch buffer used to hold vertex data before copying to the VBO.

Constructor Detail

DynamicGeometry

public DynamicGeometry(float[] data,
                       BufferObject arrayBuffer)

Creates a new dynamic geometry that will draw from a VBO.

Parameters:

data - the array from which vertex data will be copied at each update.

arrayBuffer - the VBO into which the vertex data will be copied.

DynamicGeometry

public DynamicGeometry(float[] data,
                       FloatBuffer floatArray)

Creates a new dynamic geometry that will draw directly from a float buffer.

Parameters:

data - the array from which vertex data will be copied at each update.

floatArray - the buffer into which vertex data will be copied.

DynamicGeometry

public DynamicGeometry(float[] data,
                       BufferObject arrayBuffer,
                       FloatBuffer floatArray)

Creates a new dynamic geometry.

Parameters:

data - the array from which vertex data will be copied at each update.

arrayBuffer - the VBO into which the vertex data will be copied, or null for none.

floatArray - the buffer into which vertex data will be copied, or null if using a VBO.

DynamicGeometry

protected DynamicGeometry()

Constructor for subclasses.

Method Detail

requiresUpdate

public boolean requiresUpdate()

Description copied from class: Geometry

Checks whether this geometry requires a call to its Geometry.update() method before rendering.

Overrides:

requiresUpdate in class Geometry

update

public void update()

Description copied from class: Geometry

Updates the state of the geometry.

Overrides:

update in class Geometry

updateData

protected abstract void updateData()

Updates the vertex data.

getScratchBuffer

protected static FloatBuffer getScratchBuffer(int size)

Returns a reference to the scratch buffer, (re)creating it if necessary to provide the supplied size.