de.javagl.jgltf.model

Interface AccessorModel

All Superinterfaces:

ModelElement, NamedModelElement

All Known Implementing Classes:

DefaultAccessorModel

public interface AccessorModel
extends NamedModelElement

Interface for a data accessor

Method Summary

Modifier and Type	Method and Description
AccessorData	getAccessorData() Returns the AccessorData for this accessor.
BufferViewModel	getBufferViewModel() Returns the BufferViewModel for the data that this accessor provides access to.
int	getByteOffset() Returns the byte offset of this accessor referring to its BufferViewModel
int	getByteStride() Returns the byte stride between the starts of two consecutive elements of this accessor.
java.lang.Class<?>	getComponentDataType() Returns the data type of the components of this accessor.
int	getComponentSizeInBytes() Returns the size of one component, in bytes
int	getComponentType() Returns the component type of this accessor, as a GL constant.
int	getCount() Returns the number of elements that this accessor provides access to
int	getElementSizeInBytes() Returns the size of one element, in bytes.
ElementType	getElementType() Returns the ElementType that this accessor provides access to
java.lang.Number[]	getMax() Returns the maximum components of the AccessorData.
java.lang.Number[]	getMin() Returns the minimum components of the AccessorData.
int	getPaddedElementSizeInBytes() Obtain the padded size of one element, in bytes.
boolean	isNormalized() Returns whether this accessor contains normalized data

Methods inherited from interface de.javagl.jgltf.model.NamedModelElement

getName

Methods inherited from interface de.javagl.jgltf.model.ModelElement

getExtensions, getExtras

Method Detail

getBufferViewModel

BufferViewModel getBufferViewModel()

Returns the BufferViewModel for the data that this accessor provides access to. Typed access to the data is possible by obtaining the AccessorData using getAccessorData().

Returns:

The BufferViewModel

getComponentType

int getComponentType()

Returns the component type of this accessor, as a GL constant. For example, GL_FLOAT or GL_UNSIGNED_SHORT

Returns:

The component type

getComponentDataType

java.lang.Class<?> getComponentDataType()

Returns the data type of the components of this accessor. For example, float.class or short.class.

Returns:

The component data type

isNormalized

boolean isNormalized()

Returns whether this accessor contains normalized data

Returns:

Whether this accessor contains normalized data

getComponentSizeInBytes

int getComponentSizeInBytes()

Returns the size of one component, in bytes

Returns:

The component size, in bytes

getElementSizeInBytes

int getElementSizeInBytes()

Returns the size of one element, in bytes. This does not include any padding that may have to be inserted after the columns of certain matrix types (see section 3.6.2.4. "Data Alignment"). To obtain the padded size of the elements, getPaddedElementSizeInBytes() can be used.

Returns:

The element size, in bytes

getPaddedElementSizeInBytes

int getPaddedElementSizeInBytes()

Obtain the padded size of one element, in bytes. This does include any padding that may have to be inserted after the columns of certain matrix types (see section 3.6.2.4. "Data Alignment"). For example, for a MAT2 with BYTE components, this will return 8, which is equivalent to calling

 ElementType elementType = accessorModel.getElementType();
 int componentType = accessorModel.getComponentType(); 
 int sizeWithPadding = elementType.getByteStride(componentType);
 

See ElementType.getByteStride(int).

Returns:

The padded element size, in bytes

getByteOffset

int getByteOffset()

Returns the byte offset of this accessor referring to its BufferViewModel

Returns:

The byte offset

getCount

int getCount()

Returns the number of elements that this accessor provides access to

Returns:

The number of elements

getElementType

ElementType getElementType()

Returns the ElementType that this accessor provides access to

Returns:

The ElementType

getByteStride

int getByteStride()

Returns the byte stride between the starts of two consecutive elements of this accessor. If this is 0, then the elements are tightly packed. This means that the byte stride is equal to the element size. Note that for glTF 2.0, the byte stride for vertex attributes must be a multiple 4. Callers must check whether the returned value is 0 or not a multiple of 4 accordingly.

Returns:

The byte stride

getAccessorData

AccessorData getAccessorData()

Returns the AccessorData for this accessor. The exact type of the returned AccessorData object will depend on the component data type. It will be AccessorByteData, AccessorShortData, AccessorIntData or AccessorFloatData for a component data type of byte.class, short.class, int.class or float.class, respectively, and can be safely cast to the respective type.

Returns:

The AccessorData

getMin

java.lang.Number[] getMin()

Returns the minimum components of the AccessorData. The returned array will be a clone of the array that is stored internally, and have a length that matches the number of components per element.

Returns:

The minimum components

getMax

java.lang.Number[] getMax()

Returns the maximum components of the AccessorData. The returned array will be a clone of the array that is stored internally, and have a length that matches the number of components per element.

Returns:

The maximum components