com.badlogic.gdx.graphics.glutils

Class VertexArray

java.lang.Object

com.badlogic.gdx.graphics.glutils.VertexArray

All Implemented Interfaces:

VertexData, Disposable

public class VertexArray
extends Object
implements VertexData

Convenience class for working with OpenGL vertex arrays. It interleaves all data in the order you specified in the constructor via VertexAttribute.

This class does not support shaders and for that matter OpenGL ES 2.0. For this VertexBufferObjects are needed.

Author:

mzechner, Dave Clayton

Constructor Summary

Constructors

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

Method Summary

Methods

Modifier and Type	Method and Description
void	bind(ShaderProgram shader) Binds this VertexData for rendering via glDrawArrays or glDrawElements.
void	bind(ShaderProgram shader, int[] locations) Binds this VertexData for rendering via glDrawArrays or glDrawElements.
void	dispose() Disposes this VertexData and all its associated OpenGL resources.
VertexAttributes	getAttributes()
FloatBuffer	getBuffer() Returns the underlying FloatBuffer.
int	getNumMaxVertices()
int	getNumVertices()
void	invalidate() Invalidates the VertexData if applicable.
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

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

Constructor Detail

VertexArray

public VertexArray(int numVertices,
           VertexAttribute... attributes)

Constructs a new interleaved VertexArray

Parameters:

numVertices - the maximum number of vertices

attributes - the VertexAttributes

VertexArray

public VertexArray(int numVertices,
           VertexAttributes attributes)

Constructs a new interleaved VertexArray

Parameters:

numVertices - the maximum number of vertices

attributes - the VertexAttributes

Method Detail

dispose

public void dispose()

Description copied from interface: VertexData

Disposes this VertexData and all its associated OpenGL resources.

Specified by:

dispose in interface VertexData

Specified by:

dispose in interface Disposable

getBuffer

public FloatBuffer getBuffer()

Description copied from interface: VertexData

Returns the underlying FloatBuffer. If you modify the buffer contents they will be uploaded on the next call to bind. If you need immediate uploading use VertexData.setVertices(float[], int, int);

Specified by:

getBuffer in interface VertexData

Returns:

the underlying FloatBuffer holding the vertex data.

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

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)

Description copied from interface: VertexData

Binds this VertexData for rendering via glDrawArrays or glDrawElements.

Specified by:

bind in interface VertexData

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.

getAttributes

public VertexAttributes getAttributes()

Specified by:

getAttributes in interface VertexData

Returns:

the VertexAttributes as specified during construction.

invalidate

public void invalidate()

Description copied from interface: VertexData

Invalidates the VertexData if applicable. Use this in case of a context loss.

Specified by:

invalidate in interface VertexData