com.badlogic.gdx.graphics.glutils

Class VertexBufferObjectWithVAO

java.lang.Object

com.badlogic.gdx.graphics.glutils.VertexBufferObjectWithVAO

All Implemented Interfaces:

VertexData, Disposable

public class VertexBufferObjectWithVAO
extends java.lang.Object
implements VertexData

A VertexData implementation that uses vertex buffer objects and vertex array objects. (This is required for OpenGL 3.0+ core profiles. In particular, the default VAO has been deprecated, as has the use of client memory for passing vertex attributes.) Use of VAOs should give a slight performance benefit since you don't have to bind the attributes on every draw anymore.

If the OpenGL ES context was lost you can call invalidate() to recreate a new OpenGL vertex buffer object.

VertexBufferObjectWithVAO objects must be disposed via the dispose() method when no longer needed

Code adapted from VertexBufferObject.

Author:

mzechner, Dave Clayton , Nate Austin

Constructor Summary

Constructors

Constructor and Description
VertexBufferObjectWithVAO(boolean isStatic, int numVertices, VertexAttribute... attributes) Constructs a new interleaved VertexBufferObjectWithVAO.
VertexBufferObjectWithVAO(boolean isStatic, int numVertices, VertexAttributes attributes) Constructs a new interleaved VertexBufferObjectWithVAO.

Method Summary

Modifier and Type	Method and Description
void	bind(ShaderProgram shader) Binds this VertexBufferObject for rendering via glDrawArrays or glDrawElements
void	bind(ShaderProgram shader, int[] locations) Binds this VertexData for rendering via glDrawArrays or glDrawElements.
void	dispose() Disposes of all resources this VertexBufferObject uses.
VertexAttributes	getAttributes()
java.nio.FloatBuffer	getBuffer() Returns the underlying FloatBuffer and marks it as dirty, causing the buffer contents to be uploaded on the next call to bind.
int	getNumMaxVertices()
int	getNumVertices()
void	invalidate() Invalidates the VertexBufferObject so a new OpenGL buffer handle is created.
void	setVertices(float[] vertices, int offset, int count) Sets the vertices of this VertexData, discarding the old vertex data.
void	unbind(ShaderProgram shader) Unbinds this VertexBufferObject.
void	unbind(ShaderProgram shader, int[] locations) Unbinds this VertexData.
void	updateVertices(int targetOffset, float[] vertices, int sourceOffset, int count) Update (a portion of) the vertices.

Methods inherited from class java.lang.Object

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

Constructor Detail

VertexBufferObjectWithVAO

public VertexBufferObjectWithVAO(boolean isStatic,
                                 int numVertices,
                                 VertexAttribute... attributes)

Constructs a new interleaved VertexBufferObjectWithVAO.

Parameters:

isStatic - whether the vertex data is static.

numVertices - the maximum number of vertices

attributes - the VertexAttributes.

VertexBufferObjectWithVAO

public VertexBufferObjectWithVAO(boolean isStatic,
                                 int numVertices,
                                 VertexAttributes attributes)

Constructs a new interleaved VertexBufferObjectWithVAO.

Parameters:

isStatic - whether the vertex data is static.

numVertices - the maximum number of vertices

attributes - the VertexAttributes.

Method Detail

getAttributes

public VertexAttributes getAttributes()

Specified by:

getAttributes in interface VertexData

Returns:

the VertexAttributes as specified during construction.

getNumVertices

public int getNumVertices()

Specified by:

getNumVertices in interface VertexData

Returns:

the number of vertices this VertexData stores

getNumMaxVertices

public int getNumMaxVertices()

Specified by:

getNumMaxVertices in interface VertexData

Returns:

the number of vertices this VertedData can store

getBuffer

public java.nio.FloatBuffer getBuffer()

Description copied from interface: VertexData

Returns the underlying FloatBuffer and marks it as dirty, causing the buffer contents to be uploaded on the next call to bind. If you need immediate uploading use VertexData.setVertices(float[], int, int); Any modifications made to the Buffer *after* the call to bind will not automatically be uploaded.

Specified by:

getBuffer in interface VertexData

Returns:

the underlying FloatBuffer holding the vertex data.

setVertices

public void setVertices(float[] vertices,
                        int offset,
                        int count)

Description copied from interface: VertexData

Sets the vertices of this VertexData, discarding the old vertex data. The count must equal the number of floats per vertex times the number of vertices to be copied to this VertexData. The order of the vertex attributes must be the same as specified at construction time via VertexAttributes.

This can be called in between calls to bind and unbind. The vertex data will be updated instantly.

Specified by:

setVertices in interface VertexData

Parameters:

vertices - the vertex data

offset - the offset to start copying the data from

count - the number of floats to copy

updateVertices

public void updateVertices(int targetOffset,
                           float[] vertices,
                           int sourceOffset,
                           int count)

Description copied from interface: VertexData

Update (a portion of) the vertices. Does not resize the backing buffer.

Specified by:

updateVertices in interface VertexData

vertices - the vertex data

sourceOffset - the offset to start copying the data from

count - the number of floats to copy

bind

public void bind(ShaderProgram shader)

Binds this VertexBufferObject for rendering via glDrawArrays or glDrawElements

Specified by:

bind in interface VertexData

Parameters:

shader - the shader

bind

public void bind(ShaderProgram shader,
                 int[] locations)

Description copied from interface: VertexData

Binds this VertexData for rendering via glDrawArrays or glDrawElements.

Specified by:

bind in interface VertexData

locations - array containing the attribute locations.

unbind

public void unbind(ShaderProgram shader)

Unbinds this VertexBufferObject.

Specified by:

unbind in interface VertexData

Parameters:

shader - the shader

unbind

public void unbind(ShaderProgram shader,
                   int[] locations)

Description copied from interface: VertexData

Unbinds this VertexData.

Specified by:

unbind in interface VertexData

locations - array containing the attribute locations.

invalidate

public void invalidate()

Invalidates the VertexBufferObject so a new OpenGL buffer handle is created. Use this in case of a context loss.

Specified by:

invalidate in interface VertexData

dispose

public void dispose()

Disposes of all resources this VertexBufferObject uses.

Specified by:

dispose in interface VertexData

Specified by:

dispose in interface Disposable