Package arc.graphics

Class VertexAttribute

java.lang.Object

arc.graphics.VertexAttribute

public final class VertexAttribute
extends Object

A single vertex attribute defined by its number of components and its shader alias. The number of components defines how many components the attribute has. The alias defines to which shader attribute this attribute should bind. The alias is used by a Mesh when drawing with a Shader.

Field Summary

Fields

Modifier and Type	Field	Description
final String	alias	the alias for the attribute used in a Shader
static final VertexAttribute	color
final int	components	the number of components this attribute has
static final VertexAttribute	mixColor
static final VertexAttribute	normal
final boolean	normalized	For fixed types, whether the values are normalized to either -1f and +1f (signed) or 0f and +1f (unsigned)
static final VertexAttribute	position
static final VertexAttribute	position3
final int	size	the size (in bytes) of this attribute
static final VertexAttribute	texCoords
final int	type	the OpenGL type of each component, e.g.

Constructor Summary

Constructors

Constructor	Description
VertexAttribute(int components, int type, boolean normalized, String alias)	Constructs a new VertexAttribute.
VertexAttribute(int components, String alias)	Constructs a new VertexAttribute.

Method Summary

Methods inherited from class java.lang.Object

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

Field Details

position

public static final VertexAttribute position

position3

public static final VertexAttribute position3

texCoords

public static final VertexAttribute texCoords

normal

public static final VertexAttribute normal

color

public static final VertexAttribute color

mixColor

public static final VertexAttribute mixColor

components

public final int components

the number of components this attribute has

normalized

public final boolean normalized

For fixed types, whether the values are normalized to either -1f and +1f (signed) or 0f and +1f (unsigned)

type

public final int type

the OpenGL type of each component, e.g. GL20.GL_FLOAT or GL20.GL_UNSIGNED_BYTE

alias

public final String alias

the alias for the attribute used in a Shader

size

public final int size

the size (in bytes) of this attribute

Constructor Details

VertexAttribute

public VertexAttribute(int components,
 String alias)

Constructs a new VertexAttribute. The GL data type is automatically selected based on the usage.

Parameters:

components - the number of components of this attribute, must be between 1 and 4.

alias - the alias used in a shader for this attribute. Can be changed after construction.

VertexAttribute

public VertexAttribute(int components,
 int type,
 boolean normalized,
 String alias)

Constructs a new VertexAttribute.

Parameters:

components - the number of components of this attribute, must be between 1 and 4.

type - the OpenGL type of each component, e.g. GL20.GL_FLOAT or GL20.GL_UNSIGNED_BYTE. Since Mesh stores vertex data in 32bit floats, the total size of this attribute (type size times number of components) must be a multiple of four bytes.

normalized - For fixed types, whether the values are normalized to either -1f and +1f (signed) or 0f and +1f (unsigned)

alias - The alias used in a shader for this attribute. Can be changed after construction.