A typed view into a buffer view that contains raw binary data. More...

#include <CesiumGltf/Accessor.h>

Inheritance diagram for CesiumGltf::Accessor:

Public Member Functions
int8_t	computeNumberOfComponents () const noexcept
	Computes the number of components for this accessor. More...

int8_t	computeByteSizeOfComponent () const noexcept
	Computes the number of bytes for this accessor's component type. More...

int64_t	computeBytesPerVertex () const noexcept
	Computes the total number of bytes for this accessor in each vertex. More...

int64_t	computeByteStride (const CesiumGltf::Model &model) const noexcept
	Computes this accessor's stride. More...

Public Member Functions inherited from CesiumUtility::ExtensibleObject
template<typename T >
bool	hasExtension () const noexcept
	Checks if an extension exists given its static type. More...

template<typename T >
const T *	getExtension () const noexcept
	Gets an extension given its static type. More...

template<typename T >
T *	getExtension () noexcept
	Gets an extension given its static type. More...

const JsonValue *	getGenericExtension (const std::string &extensionName) const noexcept
	Gets a generic extension with the given name as a CesiumUtility::JsonValue. More...

JsonValue *	getGenericExtension (const std::string &extensionName) noexcept
	Gets a generic extension with the given name as a CesiumUtility::JsonValue. More...

template<typename T , typename... ConstructorArgumentTypes>
T &	addExtension (ConstructorArgumentTypes &&... constructorArguments)
	Adds a statically-typed extension to this object. More...

template<typename T >
void	removeExtension ()
	Removes a statically-typed extension from this object. More...

Static Public Member Functions
static int8_t	computeNumberOfComponents (const std::string &type) noexcept
	Computes the number of components for a given accessor type. More...

static int8_t	computeByteSizeOfComponent (int32_t componentType) noexcept
	Computes the number of bytes for a given accessor component type. More...

Additional Inherited Members
Public Attributes inherited from CesiumGltf::AccessorSpec
int32_t	bufferView = -1
	The index of the bufferView. More...

int64_t	byteOffset = 0
	The offset relative to the start of the buffer view in bytes. More...

int32_t	componentType = ComponentType::BYTE
	The datatype of the accessor's components. More...

bool	normalized = false
	Specifies whether integer data values are normalized before usage. More...

int64_t	count = int64_t()
	The number of elements referenced by this accessor. More...

std::string	type = Type::SCALAR
	Specifies if the accessor's elements are scalars, vectors, or matrices. More...

std::vector< double >	max
	Maximum value of each component in this accessor. More...

std::vector< double >	min
	Minimum value of each component in this accessor. More...

std::optional< CesiumGltf::AccessorSparse >	sparse
	Sparse storage of elements that deviate from their initialization value.

Public Attributes inherited from CesiumGltf::NamedObject
std::string	name
	The user-defined name of this object. More...

Public Attributes inherited from CesiumUtility::ExtensibleObject
std::unordered_map< std::string, std::any >	extensions
	The extensions attached to this object. More...

JsonValue::Object	extras
	Application-specific data. More...

JsonValue::Object	unknownProperties
	Unknown properties that exist on this object but do not have any representation in the statically-typed classes. More...

Static Public Attributes inherited from CesiumGltf::AccessorSpec
static constexpr const char *	TypeName = "Accessor"

Detailed Description

A typed view into a buffer view that contains raw binary data.

Definition at line 12 of file Accessor.h.

Member Function Documentation

◆ computeByteSizeOfComponent() [1/2]

int8_t CesiumGltf::Accessor::computeByteSizeOfComponent ( ) const

noexcept

Computes the number of bytes for this accessor's component type.

For example if this accessor's Accessor::componentType is CesiumGltf::Accessor::ComponentType::UNSIGNED_SHORT, then the component type is 2 bytes, while if it's CesiumGltf::Accessor::ComponentType::FLOAT then it is 4 bytes.

Returns: The number of bytes for this accessor's component type. Returns 0 if this accessor's Accessor::componentType does not have a valid enumeration value.

◆ computeByteSizeOfComponent() [2/2]

static int8_t CesiumGltf::Accessor::computeByteSizeOfComponent ( int32_t componentType )

staticnoexcept

Computes the number of bytes for a given accessor component type.

For example CesiumGltf::Accessor::ComponentType::UNSIGNED_SHORT is 2 bytes while CesiumGltf::Accessor::ComponentType::FLOAT is 4 bytes.

Parameters

componentType The accessor component type.

Returns: The number of bytes for the component type. Returns 0 if Accessor::componentType is not a valid enumeration value.

◆ computeBytesPerVertex()

int64_t CesiumGltf::Accessor::computeBytesPerVertex ( ) const

noexcept

Computes the total number of bytes for this accessor in each vertex.

This is computed by multiplying Accessor::computeByteSizeOfComponent by Accessor::computeNumberOfComponents.

Returns: The total number of bytes for this accessor in each vertex. Returns 0 if this accessor's Accessor::type or Accessor::componentType does not have a valid enumeration value.

◆ computeByteStride()

int64_t CesiumGltf::Accessor::computeByteStride ( const CesiumGltf::Model & model ) const

noexcept

Computes this accessor's stride.

The stride is the number of bytes between the same elements of successive vertices. The returned value will be at least as large as Accessor::computeBytesPerVertex, but maybe be larger if this accessor's data is interleaved with other accessors.

The behavior is undefined if this accessor is not part of the given model.

Parameters

model The model that this accessor is a part of.

Returns: The stride in bytes. Returns 0 if this accessor's Accessor::type or Accessor::componentType does not have a valid enumeration value, or if Accessor::bufferView does not refer to a valid BufferView.

◆ computeNumberOfComponents() [1/2]

int8_t CesiumGltf::Accessor::computeNumberOfComponents ( ) const

noexcept

Computes the number of components for this accessor.

For example if this accessor's Accessor::type is CesiumGltf::Accessor::Type::SCALAR, then it has 1 component, while if it's CesiumGltf::Accessor::Type::VEC4 it has 4 components.

Returns: The number of components in this accessor. Returns 0 if this accessor's Accessor::type does not have a valid enumeration value.

◆ computeNumberOfComponents() [2/2]

static int8_t CesiumGltf::Accessor::computeNumberOfComponents ( const std::string & type )

staticnoexcept

Computes the number of components for a given accessor type.

For example CesiumGltf::Accessor::Type::SCALAR has 1 component while CesiumGltf::Accessor::Type::VEC4 has 4 components.

Parameters

type	The accessor type.

Returns: The number of components. Returns 0 if Accessor::type is not a valid enumeration value.

The documentation for this struct was generated from the following file:

/home/runner/work/cesium-native/cesium-native/CesiumGltf/include/CesiumGltf/Accessor.h

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ computeByteSizeOfComponent() [1/2]

◆ computeByteSizeOfComponent() [2/2]

◆ computeBytesPerVertex()

◆ computeByteStride()

◆ computeNumberOfComponents() [1/2]

◆ computeNumberOfComponents() [2/2]