inviwo::SpatialCoordinateTransformer Class Reference

Inheritance diagram for inviwo::SpatialCoordinateTransformer:

Public Member Functions
virtual SpatialCoordinateTransformer *	clone () const =0
virtual glm::mat4	getDataToModelMatrix () const =0
virtual glm::mat4	getDataToWorldMatrix () const =0
glm::mat3	getInverseMetricTensor () const
	Computes the inverse metric tensor for the dataToWorld basis. This it useful for gradient computation.
virtual glm::mat4	getMatrix (CoordinateSpace from, CoordinateSpace to) const
glm::mat3	getMetricTensor () const
	Computes the metric tensor for the dataToWorld basis.
virtual glm::mat4	getModelToDataMatrix () const =0
virtual glm::mat4	getModelToWorldMatrix () const =0
virtual glm::mat4	getWorldToDataMatrix () const =0
virtual glm::mat4	getWorldToModelMatrix () const =0
virtual glm::vec3	transformNormal (const vec3 &normal, CoordinateSpace from, CoordinateSpace to) const
virtual glm::vec3	transformPosition (const vec3 &pos, CoordinateSpace from, CoordinateSpace to) const
virtual glm::vec4	transformPositionHomogeneous (const vec4 &pos, CoordinateSpace from, CoordinateSpace to) const

Static Public Member Functions
static glm::mat3	getMetricTensor (glm::mat3 basis)
	Computes the metric tensor g_ij from a set of basis vectors.

Protected Member Functions
SpatialCoordinateTransformer &	operator= (const SpatialCoordinateTransformer &)=delete
SpatialCoordinateTransformer &	operator= (SpatialCoordinateTransformer &&)=delete
	SpatialCoordinateTransformer (const SpatialCoordinateTransformer &)=default
	SpatialCoordinateTransformer (SpatialCoordinateTransformer &&)=delete

Member Function Documentation

getDataToModelMatrix()

virtual glm::mat4 inviwo::SpatialCoordinateTransformer::getDataToModelMatrix ( ) const

pure virtual

Returns the matrix transformation mapping from raw data numbers to model space coordinates, i.e. from generally (-inf, inf), ([0,1] for textures) to (data min, data max)

Implemented in inviwo::SpatialCameraCoordinateTransformerImpl, inviwo::SpatialCoordinateTransformerImpl, inviwo::StructuredCameraCoordinateTransformerImpl< N >, and inviwo::StructuredCoordinateTransformerImpl< N >.

getDataToWorldMatrix()

virtual glm::mat4 inviwo::SpatialCoordinateTransformer::getDataToWorldMatrix ( ) const

pure virtual

Returns the matrix transformation mapping from raw data numbers to world space coordinates, i.e. from generally (-inf, inf), ([0,1] for textures) to (-inf, inf)

Implemented in inviwo::SpatialCameraCoordinateTransformerImpl, inviwo::SpatialCoordinateTransformerImpl, inviwo::StructuredCameraCoordinateTransformerImpl< N >, and inviwo::StructuredCoordinateTransformerImpl< N >.

getInverseMetricTensor()

glm::mat3 inviwo::SpatialCoordinateTransformer::getInverseMetricTensor

(

)

const

Computes the inverse metric tensor for the dataToWorld basis. This it useful for gradient computation.

The gradient ∇f in world space is then computed based on the partial derivatives in u and v direction ∇f = g_11 ∂f/∂u a_1 + g_12 ∂f/∂u a_2 + g_21 ∂f/∂v a_1 + g_22 ∂f/∂v a_2, where g_ij refers to the inverse metric tensor and a_i to the ith basis vector.

Returns

inverse metric tensor

getMatrix()

virtual glm::mat4 inviwo::SpatialCoordinateTransformer::getMatrix ( CoordinateSpace from, CoordinateSpace to ) const

virtual

Returns the matrix transformation mapping from from coordinates to to coordinates

Reimplemented in inviwo::SpatialCameraCoordinateTransformer, inviwo::StructuredCameraCoordinateTransformer, and inviwo::StructuredCoordinateTransformer.

getMetricTensor()

glm::mat3 inviwo::SpatialCoordinateTransformer::getMetricTensor ( glm::mat3 basis )

static

Computes the metric tensor g_ij from a set of basis vectors.

The metric tensor is defined as:

g_ij = dot(a_i, a_j)

where a_i are the basis vectors of the coordinate system.

Parameters

basis

A 3×3 matrix whose columns contain the basis vectors of the coordinate system expressed in Cartesian coordinates.

Returns

A 3×3 symmetric matrix containing the metric tensor g_ij.

getModelToDataMatrix()

virtual glm::mat4 inviwo::SpatialCoordinateTransformer::getModelToDataMatrix ( ) const

pure virtual

Returns the matrix transformation mapping from model space coordinates to raw data numbers, i.e. from (data min, data max) to generally (-inf, inf), ([0,1] for textures)

Implemented in inviwo::SpatialCameraCoordinateTransformerImpl, inviwo::SpatialCoordinateTransformerImpl, inviwo::StructuredCameraCoordinateTransformerImpl< N >, and inviwo::StructuredCoordinateTransformerImpl< N >.

getModelToWorldMatrix()

virtual glm::mat4 inviwo::SpatialCoordinateTransformer::getModelToWorldMatrix ( ) const

pure virtual

Returns the matrix transformation mapping from model space coordinates to world space coordinates, i.e. from (data min, data max) to (-inf, inf)

Implemented in inviwo::SpatialCameraCoordinateTransformerImpl, inviwo::SpatialCoordinateTransformerImpl, inviwo::StructuredCameraCoordinateTransformerImpl< N >, and inviwo::StructuredCoordinateTransformerImpl< N >.

getWorldToDataMatrix()

virtual glm::mat4 inviwo::SpatialCoordinateTransformer::getWorldToDataMatrix ( ) const

pure virtual

Returns the matrix transformation mapping from world space coordinates to raw data numbers, i.e. from (-inf, inf) to generally (-inf, inf), ([0,1] for textures)

Implemented in inviwo::SpatialCameraCoordinateTransformerImpl, inviwo::SpatialCoordinateTransformerImpl, inviwo::StructuredCameraCoordinateTransformerImpl< N >, and inviwo::StructuredCoordinateTransformerImpl< N >.

getWorldToModelMatrix()

virtual glm::mat4 inviwo::SpatialCoordinateTransformer::getWorldToModelMatrix ( ) const

pure virtual

Returns the matrix transformation mapping from world space coordinates to model space coordinates, i.e. from (-inf, inf) to (data min, data max)

Implemented in inviwo::SpatialCameraCoordinateTransformerImpl, inviwo::SpatialCoordinateTransformerImpl, inviwo::StructuredCameraCoordinateTransformerImpl< N >, and inviwo::StructuredCoordinateTransformerImpl< N >.

transformNormal()

virtual glm::vec3 inviwo::SpatialCoordinateTransformer::transformNormal ( const vec3 & normal, CoordinateSpace from, CoordinateSpace to ) const

virtual

Transforms the given normal from from coordinates to to coordinates. Only considers transformations between supported by this SpatialCoordinateTransformer. That is Data to Model, Model to World, Data to World and their inverse, camera or index coordinates are not supported.

transformPosition()

virtual glm::vec3 inviwo::SpatialCoordinateTransformer::transformPosition ( const vec3 & pos, CoordinateSpace from, CoordinateSpace to ) const

virtual

Transforms the given position pos from from coordinates to to coordinates. The resulting position is divided by w.

transformPositionHomogeneous()

virtual glm::vec4 inviwo::SpatialCoordinateTransformer::transformPositionHomogeneous ( const vec4 & pos, CoordinateSpace from, CoordinateSpace to ) const

virtual

Transforms the given position pos from from coordinates to to coordinates using homogeneous coordinates

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

• include/inviwo/core/datastructures/coordinatetransformer.h