cTriangle Struct Reference
[Graphics]

cTriangle defines a triangle, typically bound to a mesh for graphic rendering. More...

#include <CTriangle.h>

List of all members.

Public Member Functions
	cTriangle (cMesh *a_parent, const unsigned int a_indexVertex0, const unsigned int a_indexVertex1, const unsigned int a_indexVertex2)
	cTriangle ()
	~cTriangle ()
void	setVertices (const unsigned int a_indexVertex0, const unsigned int a_indexVertex1, const unsigned int a_indexVertex2)
cVertex *	getVertex0 () const
cVertex *	getVertex1 () const
cVertex *	getVertex2 () const
cVertex *	getVertex (int vi) const
unsigned int	getVertexIndex (int vi) const
unsigned int	getIndexVertex0 () const
unsigned int	getIndexVertex1 () const
unsigned int	getIndexVertex2 () const
unsigned int	getIndex () const
cMesh *	getParent () const
void	setParent (cMesh *parent)
bool	allocated () const
bool	computeCollision (cVector3d &a_segmentPointA, cVector3d &a_segmentPointB, cCollisionRecorder &a_recorder, cCollisionSettings &a_settings) const
double	computeArea ()
Public Attributes
unsigned int	m_indexVertex0
	Index number of vertex 0 (defines a location in my owning mesh's vertex array).
unsigned int	m_indexVertex1
	Index number of vertex 1 (defines a location in my owning mesh's vertex array).
unsigned int	m_indexVertex2
	Index number of vertex 2 (defines a location in my owning mesh's vertex array).
unsigned int	m_index
	Index number of this triangle (defines a location in my owning mesh's triangle array).
cMesh *	m_parent
	The mesh that owns me.
bool	m_allocated
	Is this triangle still active?
int	m_tag
	For custom use. No specific purpose.
std::vector< cTriangle * > *	m_neighbors
	A mesh can be organized into a network of neighboring triangles, which are stored here...

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Detailed Description

cTriangle defines a triangle, typically bound to a mesh for graphic rendering.

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Constructor & Destructor Documentation

cTriangle::cTriangle	(	cMesh *	a_parent,
		const unsigned int	a_indexVertex0,
		const unsigned int	a_indexVertex1,
		const unsigned int	a_indexVertex2
	)			[inline]

Constructor of cTriangle.

Parameters:

	a_parent	Parent mesh.
	a_indexVertex0	index position of vertex 0.
	a_indexVertex1	index position of vertex 1.
	a_indexVertex2	index position of vertex 2.

cTriangle::cTriangle

(

)

[inline]

Default constructor of cTriangle.

cTriangle::~cTriangle

(

)

[inline]

Destructor of cTriangle.

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Member Function Documentation

bool cTriangle::allocated

(

)

const [inline]

Is this triangle allocated to an existing mesh?

Returns:

Return true if triangle is allocated to an existing mesh, otherwise return false.

double cTriangle::computeArea

(

)

[inline]

Compute and return the area of this triangle.

Returns:

Returns the area of this triangle.

bool cTriangle::computeCollision	(	cVector3d &	a_segmentPointA,
		cVector3d &	a_segmentPointB,
		cCollisionRecorder &	a_recorder,
		cCollisionSettings &	a_settings
	)			const [inline]

Check if a ray intersects this triangle. The ray is described by its origin (a_origin) and its direction (a_direction).

If a collision occurs, this information is stored in the collision recorder a_recorder.

This is one of the most performance-critical routines in CHAI, so we have code here for a couple different approaches that may become useful in different scenarios.

Parameters:

	a_segmentPointA	Point from where collision ray starts (in local frame).
	a_segmentPointB	Direction vector of collision ray (in local frame).
	a_recorder	Stores collision events
	a_settings	Settings related to collision detection process.

Returns:

Returns true if a collision occured, otherwise false.

unsigned int cTriangle::getIndex

(

)

const [inline]

Read the index of this triangle (defines a location in my owning mesh's triangle array).

Returns:

Return index number.

unsigned int cTriangle::getIndexVertex0

(

)

const [inline]

Read index number of vertex 0 (defines a location in my owning mesh's vertex array).

Returns:

Return index number.

unsigned int cTriangle::getIndexVertex1

(

)

const [inline]

Read index number of vertex 1 (defines a location in my owning mesh's vertex array).

Returns:

Return index number.

unsigned int cTriangle::getIndexVertex2

(

)

const [inline]

Read index number of vertex 2 (defines a location in my owning mesh's vertex array).

Returns:

Return index number.

cMesh* cTriangle::getParent

(

)

const [inline]

Retrieve a pointer to the mesh that owns this triangle.

Returns:

Return pointer to parent mesh.

cVertex* cTriangle::getVertex

(

int

vi

)

const [inline]

Access a pointer to the specified vertex of this triangle.

Parameters:

vi

The triangle (0, 1, or 2) to access.

Returns:

Returns a pointer to the requested triangle, or 0 for an illegal index

cVertex* cTriangle::getVertex0

(

)

const [inline]

Read pointer to vertex 0 of triangle.

Returns:

Return pointer to vertex 0.

cVertex* cTriangle::getVertex1

(

)

const [inline]

Read pointer to vertex 1 of triangle.

Returns:

Return pointer to vertex 1.

cVertex* cTriangle::getVertex2

(

)

const [inline]

Read pointer to vertex 2 of triangle.

Returns:

Return pointer to vertex 2.

unsigned int cTriangle::getVertexIndex

(

int

vi

)

const [inline]

Access the index of the specified vertex of this triangle.

Parameters:

vi

The triangle (0, 1, or 2) to access.

Returns:

Returns the index of the specified triangle.

void cTriangle::setParent

(

cMesh *

parent

)

[inline]

Set pointer to mesh parent of triangle.

void cTriangle::setVertices	(	const unsigned int	a_indexVertex0,
		const unsigned int	a_indexVertex1,
		const unsigned int	a_indexVertex2
	)			[inline]

Set the vertices of the triangle by passing the index numbers of the corresponding vertices.

Parameters:

	a_indexVertex0	index position of vertex 0.
	a_indexVertex1	index position of vertex 1.
	a_indexVertex2	index position of vertex 2.

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

• D:/CHAI3D/build-2-0-0/2.0.0/win32/src/graphics/CTriangle.h