a class to load in the ASCII houdini .geo files for poly data the spec for the format can be found here http://www.sidefx.com/docs/houdini9.5/io/formats/geo More...

#include <HoudiniGeo.h>

Inheritance diagram for ngl::HoudiniGeo:

Collaboration diagram for ngl::HoudiniGeo:

Public Member Functions
	HoudiniGeo ()
	default constructor More...

	HoudiniGeo (const std::string &_fName)
	ctor passing in the file name to load More...

	HoudiniGeo (const std::string &_fName, const std::string &_texName)
	ctor passing in the file name to load and a texture More...

void	drawDebugPoints ()
	simple debug drawing of points will be removed once class finished More...

Public Member Functions inherited from ngl::AbstractMesh
	AbstractMesh () noexcept
	default ctor must be called from the child class so our dtor is called More...

virtual	~AbstractMesh () noexcept
	destructor this will clear out all the vert data and the vbo if created More...

void	drawBBox () const noexcept
	method to draw the bounding box More...

void	draw () const noexcept
	draw method to draw the obj as a VBO. The VBO first needs to be created using the CreateVBO method More...

void	loadTexture (const std::string &_fname) noexcept
	load int a texture and set it as the active texture of the Obj More...

void	scale (Real _sx, Real _sy, Real _sz) noexcept
	scale the obj by multiplying the actual vertex values by sx,sy and sz More...

void	calcDimensions () noexcept
	a method to set the BBox and center More...

void	calcBoundingSphere () noexcept
	a method to caluculate the bounding Sphere will set m_sphereCenter and m_sphereRadius More...

void	writeToRibSubdiv (RibExport &_ribFile) const noexcept

virtual void	createVAO () noexcept

unsigned int	getTextureID () const noexcept
	get the texture id More...

Real *	mapVAOVerts () noexcept
	map the VBO vertex data More...

void	unMapVAO () noexcept
	unmap the VBO based More...

const std::vector< IndexRef > &	getIndices () noexcept
	get a pointer to the indices used to represent the VBO data, this is used in the clip class when re-ordering the clip data values More...

void	saveNCCABinaryMesh (const std::string &_fname) noexcept
	save the mesh as NCCA Binary VBO format basically this format is the processed binary vbo mesh data as as packed by the CreateVBO() method is called. More...

BBox &	getBBox () noexcept
	a method to get the current bounding box of the mesh More...

std::vector< Vec3 >	getVertexList () noexcept
	accessor for the vertex data More...

Vec3	getVertexAtIndex (uint32_t _i) const noexcept
	accessor for the vertex data More...

std::vector< Vec3 >	getNormalList () noexcept
	accessor for the normals data More...

std::vector< Vec3 >	getTextureCordList () noexcept
	accessor for the texture co-ordinates data More...

std::vector< Face >	getFaceList () noexcept
	accessor for the Face data More...

unsigned int	getNumVerts () const noexcept
	accessor to get the number of vertices in the object More...

unsigned int	getNumNormals () const noexcept
	accessor to get the number of normals in the object More...

unsigned int	getNumTexCords () const noexcept
	accessor to get the number of texture co-ordinates in the object More...

unsigned int	getNumFaces () const noexcept
	accessor to get the number of faces in the object More...

unsigned int	getMeshSize () const noexcept

Vec3	getSphereCenter () const noexcept
	accesor to get the bounding sphere center More...

Real	getSphereRadius () const noexcept
	accesor to get the bounding sphere center More...

Vec3	getCenter () const noexcept
	accesor to get the center More...

bool	isTriangular () noexcept
	check to see if obj is triangulated as we only support tri or quad objs at the moment More...

Protected Member Functions
bool	loadHeader (std::ifstream &_stream)
	method to check the header and see if we have a valid geo file it also reads in the ammount of Points ammount of prims and the basic attribute counts More...

void	loadPointAttribDictionary (std::ifstream &_stream)
	method to load the attribute dictionary from the geo file. At present we are only worried about Normals and UV but this class will be written to be extendable. The main problem is the dictionary can be in any order so we need to find the index into our data for each ones and store it. the dictionary format is as follows Name Size Type Default valid dictionary values are. N a normal uv a uv More...

bool	load (const std::string &_fName, bool _calcBB=true)
	the main loader for the geo we will have other methods called from this More...

void	loadPoints (std::ifstream &_stream)
	a method to load the points from the geo file More...

Protected Attributes
int	m_nPointAttrib
	the number of point attributes More...

int	m_nVertAttrib
	the number of vertex attributes More...

int	m_normalTokenIndex
	normal token index used when parsing the geo file More...

int	m_uvTokenIndex
	uv token index used when paring the geo file More...

std::map< std::string, HouDictionaryEntry * >	m_dictionary
	map used when parsing the Attribute Data More...

Protected Attributes inherited from ngl::AbstractMesh
unsigned int	m_nVerts
	The number of vertices in the object. More...

unsigned int	m_nNorm
	The number of normals in the object. More...

unsigned int	m_nTex
	the number of texture co-ordinates in the object More...

unsigned int	m_nFaces
	the number of faces in the object More...

std::vector< Vec3 >	m_verts
	Pointer to the Vertex list. More...

std::vector< Vec3 >	m_norm
	Pointer to the Normal List. More...

std::vector< Vec3 >	m_tex
	Pointer to the Texture co-ord list (note that only x and y are used) More...

std::vector< Face >	m_face
	Pointer to the Face list. More...

Vec3	m_center
	Center of the object. More...

std::vector< IndexRef >	m_indices
	a vector of indices used to pass the index into the Data arrays to the VBO More...

std::vector< GLuint >	m_outIndices
	a vectr of indices without duplicates which are actually passed to the VBO when creating More...

size_t	m_indexSize
	the size of the index array More...

size_t	m_meshSize

GLuint	m_vboBuffers
	buffers for the VBO in order Vert, Tex, Norm More...

std::unique_ptr< AbstractVAO >	m_vaoMesh
	id for our vertexArray object More...

bool	m_vbo
	flag to indicate if a VBO has been created More...

bool	m_vao
	flag to indicate if a VBO has been created More...

bool	m_vboMapped
	flag to indicate if the VBO vertex data has been mapped More...

bool	m_texture
	flag to indicate if texture assigned More...

GLuint	m_textureID
	The openGL id of the texture for the texture generation. More...

Real	m_maxX
	The Maximum X value in the obj file used to calculate the extents bbox. More...

Real	m_minX
	The Min X value in the obj file used to calculate the extents bbox. More...

Real	m_maxY
	The Max Y value in the obj file used to calculate the extents bbox. More...

Real	m_minY
	The Min Y value in the obj file used to calculate the extents bbox. More...

Real	m_maxZ
	The Max Z value in the obj file used to calculate the extents bbox. More...

Real	m_minZ
	The Min Z value in the obj file used to calculate the extents bbox. More...

std::unique_ptr< BBox >	m_ext
	Create a bounding box of the object to store it's extents. More...

GLuint	m_dataPackType
	determines if the data is Packed as either TRI or QUAD More...

unsigned int	m_bufferPackSize
	the size of the buffer pack we use this for the saving of bin vbo but it actually holds the size of the data (3 for just verts 5 verts norms etc) More...

GLenum	m_vboDrawType
	which type of VBO are we going to draw More...

bool	m_loaded
	flag to indicate if anything loaded for dtor More...

Vec3	m_sphereCenter
	the center of the bounding sphere More...

Real	m_sphereRadius
	the radius of the bounding sphere More...

Detailed Description

a class to load in the ASCII houdini .geo files for poly data the spec for the format can be found here http://www.sidefx.com/docs/houdini9.5/io/formats/geo

Author: Jon Macey

Version: 1.0

Date: Last Revision 12/10/09 First version

Definition at line 91 of file HoudiniGeo.h.

Constructor & Destructor Documentation

ngl::HoudiniGeo::HoudiniGeo ( )

inline

default constructor

Definition at line 99 of file HoudiniGeo.h.

ngl::HoudiniGeo::HoudiniGeo ( const std::string & _fName )

ctor passing in the file name to load

Parameters

[in] _fName the name of the file to load

Definition at line 59 of file HoudiniGeo.cpp.

References load(), ngl::AbstractMesh::m_loaded, and ngl::AbstractMesh::m_vbo.

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ngl::HoudiniGeo::HoudiniGeo	(	const std::string &	_fName,
		const std::string &	_texName
	)

ctor passing in the file name to load and a texture

Parameters

[in]	_fName	the name of the file to load
[in]	_texName	the name of the texture file to load

Definition at line 68 of file HoudiniGeo.cpp.

References load(), ngl::AbstractMesh::loadTexture(), ngl::AbstractMesh::m_loaded, and ngl::AbstractMesh::m_vbo.

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Member Function Documentation

void ngl::HoudiniGeo::drawDebugPoints ( void )

simple debug drawing of points will be removed once class finished

Todo:: write GL3.x code to do this

Definition at line 272 of file HoudiniGeo.cpp.

bool ngl::HoudiniGeo::load	(	const std::string &	_fName,
		bool	_calcBB = `true`
	)

protectedvirtual

the main loader for the geo we will have other methods called from this

Parameters

_fName the name of the file to load

Implements ngl::AbstractMesh.

Definition at line 28 of file HoudiniGeo.cpp.

References ngl::AbstractMesh::calcDimensions(), loadHeader(), loadPointAttribDictionary(), loadPoints(), and m_nPointAttrib.

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bool ngl::HoudiniGeo::loadHeader ( std::ifstream & _stream )

protected

method to check the header and see if we have a valid geo file it also reads in the ammount of Points ammount of prims and the basic attribute counts

Parameters

[in] the open file stream from the Load method

Returns: true if a valid geo file

Load in the header as specified here Magic Number: PGEOMETRY Point/Prim Counts: NPoints # NPrims # Group Counts: NPointGroups # NPrimGroups # Attribute Counts: NPointAttrib # NVertexAttrib # NPrimAttrib # NAttrib # each of these cases, the # represents the number of the element described

Definition at line 86 of file HoudiniGeo.cpp.

References ngl::AbstractMesh::m_face, ngl::AbstractMesh::m_nFaces, m_normalTokenIndex, m_nPointAttrib, m_nVertAttrib, ngl::AbstractMesh::m_nVerts, m_uvTokenIndex, and ngl::AbstractMesh::m_verts.

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void ngl::HoudiniGeo::loadPointAttribDictionary ( std::ifstream & _stream )

protected

method to load the attribute dictionary from the geo file. At present we are only worried about Normals and UV but this class will be written to be extendable. The main problem is the dictionary can be in any order so we need to find the index into our data for each ones and store it. the dictionary format is as follows Name Size Type Default valid dictionary values are. N a normal uv a uv

Definition at line 214 of file HoudiniGeo.cpp.

References m_dictionary, and m_nPointAttrib.

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void ngl::HoudiniGeo::loadPoints ( std::ifstream & _stream )

protected

a method to load the points from the geo file

Parameters

_fName the name of the file to load

now we can actually load the Point data into our vert structure it is going to be formatted in the following way depending upon our dictionary PointAttrib Cd 3 float 0 0 0 # Color attrib., 3 floats, default 0 0 0 Alpha 1 float 1 # Alpha attribute, 1 float, default 1 N 3 float 0 0 0 # Normal attribute uv 2 float 0 0 # Texture coordinate

The data for the point might look like:

0 0 0 1 (1 0 0 1 0 0 1 .5 .5) ^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^ Position Attributes

The point would have:

Cd = (1, 0, 0) Alpha = 1 N = (0 0 1) uv = (.5, .5) we already know how many points to load and we have re-sized the data to fit so should the first 4 values are the homogeneous point values

Definition at line 151 of file HoudiniGeo.cpp.

References ngl::AbstractMesh::m_nVerts, and ngl::AbstractMesh::m_verts.

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Member Data Documentation

std::map<std::string,HouDictionaryEntry *> ngl::HoudiniGeo::m_dictionary

protected

map used when parsing the Attribute Data

Definition at line 143 of file HoudiniGeo.h.

int ngl::HoudiniGeo::m_normalTokenIndex

protected

normal token index used when parsing the geo file

Definition at line 135 of file HoudiniGeo.h.

int ngl::HoudiniGeo::m_nPointAttrib

protected

the number of point attributes

Definition at line 127 of file HoudiniGeo.h.

int ngl::HoudiniGeo::m_nVertAttrib

protected

the number of vertex attributes

Definition at line 131 of file HoudiniGeo.h.

int ngl::HoudiniGeo::m_uvTokenIndex

protected

uv token index used when paring the geo file

Definition at line 139 of file HoudiniGeo.h.

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

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation