Cube Class Reference

Describes a equilateral cube, centered on the origin. More...

#include <geometry.h>

Public Types
enum	Corner {   MinMinMin = 0, MaxMinMin, MinMaxMin, MaxMaxMin,   MinMinMax, MaxMinMax, MinMaxMax, MaxMaxMax,   COUNT }
	Defines the 8 corner points of the cube, in XYZ format. More...

Public Member Functions
	Cube (float sideLength=1.0f)
	Creates a cube with the specified side length. More...
const QVector3D *const	getVertices () const
	Returns the 8 vertices of the cube. More...
QVector< QVector4D >	transform (const QMatrix4x4 &mat) const
	Multiplies the vertices with the given matrix and returns the result. More...
QVector< QVector4D >	transform (const QMatrix4x4 &mat, QVector4D &minPos, QVector4D &maxPos) const
	Multiplies the vertices with the given matrix and returns the result. More...
QVector< QVector3D >	transform3D (const QMatrix4x4 &mat, QVector3D &minPos, QVector3D &maxPos) const
	Same as transform, but with the w components omitted.

Static Public Attributes
static const ushort	triangleIndices [36]
	6 * 2 * 3 = 36 indices for a triangle representation of the cube, vertices ordered CCW. More...
static const ushort	triangleCount = 12
	Number of triangles in triangleIndices (=12)
static const ushort	quadIndices [24]
	6 * 4 = 24 indices for a quad representation of the cube (faces), vertices ordered CCW. More...
static const ushort	quadCount = 6
	Number of quads in quadIndices (=6)
static const ushort	lineIndices [24]
	12 * 2 = 24 indices for a line representation of the cube (edges) More...
static const ushort	lineCount =12
	Number of lines in lineIndices (=12)

Private Attributes
float	m_sidelength
	The side length of the cube.
QVector3D *	m_vertices
	The 8 vertices of the cube, in the order defined by Corner.

Detailed Description

Describes a equilateral cube, centered on the origin.

Note that this is not a QObject. The constructor takes the side length of the cube

Member Enumeration Documentation

enum Cube::Corner

Defines the 8 corner points of the cube, in XYZ format.

The vertices returned by this class are in exactly the order as specified in this array.

Constructor & Destructor Documentation

Cube::Cube ( float  sideLength = 1.0f )

explicit

Creates a cube with the specified side length.

The default side length is 1.0. The resulting vertices have coordinates equivalent to \( \pm \frac{sideLength}{2} \) on each axis.

Parameters

sideLength

The side length of the cube.

Member Function Documentation

const QVector3D *const Cube::getVertices

(

)

const

Returns the 8 vertices of the cube.

This array must not be modified.

Returns

an 8-element array that contains the vertices of this cube.

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QVector< QVector4D > Cube::transform

(

const QMatrix4x4 &

mat

)

const

Multiplies the vertices with the given matrix and returns the result.

The returned values can be freely used.

The vectors with indices 0-7 are the transformed vertices corresponding to the original vertices with indices 0-7.

Parameters

mat	The matrix to multiply with

Returns

a QVector of size 8, can be used as required.

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QVector< QVector4D > Cube::transform	(	const QMatrix4x4 &	mat,
		QVector4D &	minPos,
		QVector4D &	maxPos
	)		const

Multiplies the vertices with the given matrix and returns the result.

The returned values can be freely used.

The vectors with indices 0-7 are the transformed vertices corresponding to the original vertices with indices 0-7. The other parameters contain the minmal and maximal values on each axis.

Parameters

mat	The matrix to multiply with
minPos	contains the minimal value of the transformed points in each axis
maxPos	contains the maximal value of the transformed points in each axis

Returns

a QVector of size 8, can be used as required.

Member Data Documentation

const ushort Cube::lineIndices

static

Initial value:

= 
{
    0,1,1,3,3,2,2,0, 
    0,4,2,6,1,5,3,7, 
    4,5,5,7,7,6,6,4, 
}

12 * 2 = 24 indices for a line representation of the cube (edges)

const ushort Cube::quadIndices

static

Initial value:

= 
{
    0,1,3,2, 
    1,5,7,3, 
    5,4,6,7, 
    4,0,2,6, 
    0,4,5,1, 
    2,3,7,6  
}

6 * 4 = 24 indices for a quad representation of the cube (faces), vertices ordered CCW.

const ushort Cube::triangleIndices

static

Initial value:

=
{
    0,3,1, 0,2,3, 
    7,5,1, 7,1,3, 
    4,5,6, 5,7,6, 
    2,0,4, 2,4,6, 
    4,1,5, 4,0,1, 
    2,7,3, 2,6,7  
}

6 * 2 * 3 = 36 indices for a triangle representation of the cube, vertices ordered CCW.

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

• VoxelBlur/geometry.h
• VoxelBlur/geometry.cpp