neo::collision::Frustum Class Reference

#include <collision/frustum.h>

Collaboration diagram for neo::collision::Frustum:

[legend]List of all members.

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Detailed Description

3D frustum used for frustum culling

Author:

Mattias Jansson (mattias@realityrift.com)

Public Types
enum	PlaneID
	Frustum planes.
Public Member Functions
bool	intersect (const math::Vector3 &point) const
	Test if point is inside frustum.
bool	intersect (const AABB &aabb) const
	Test if AABB is inside frustum.
bool	intersect (const OBB &obb) const
	Test if OBB is inside frustum.
bool	intersect (const Sphere &sphere) const
	Test if sphere is inside frustum.
bool	intersect (const Volume *p_volume, bool def=true) const
	Test if generic volume is inside frustum.
Public Attributes
unsigned int	_signP [6][3]
unsigned int	_signN [6][3]
Plane	_planes [6]
math::Vector3	_direction
float	_zNear
float	_zFar

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Member Function Documentation

bool neo::collision::Frustum::intersect

(

const math::Vector3 &

point

)

const

Test if point is inside frustum

Parameters:

point

Point

Returns:

true if inside volume, false otherwise

bool neo::collision::Frustum::intersect

(

const AABB &

aabb

)

const

Test if AABB is inside frustum

Parameters:

aabb

AABB

Returns:

true if inside volume, false otherwise

bool neo::collision::Frustum::intersect

(

const OBB &

obb

)

const

Test if OBB is inside frustum

Parameters:

obb

OBB

Returns:

true if inside volume, false otherwise

bool neo::collision::Frustum::intersect

(

const Sphere &

sphere

)

const

Test if sphere is inside frustum

Parameters:

sphere

Sphere

Returns:

true if inside volume, false otherwise

bool neo::collision::Frustum::intersect	(	const Volume *	p_volume,
		bool	def = true
	)			const [inline]

Test if generic volume is inside frustum. If a null pointer is passed, the default value is returned

Parameters:

	p_volume	Volume
	def	Default return value

Returns:

true if inside volume, false otherwise

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Member Data Documentation

unsigned int neo::collision::Frustum::_signP[6][3]

Vertex signs. These indicate which box corner in the AA box should be used as near and far vertex when culling against frustum during rendering. 6 planes in frustum as first index. Second index is vertex component, 0 = x, 1 = y, 2 = z. A value of 0 is positive and 1 is negative

unsigned int neo::collision::Frustum::_signN[6][3]

N is inverted P but precalculate to gain speed

Plane neo::collision::Frustum::_planes[6]

The equation data (normal and distance) for the 6 frustum planes

math::Vector3 neo::collision::Frustum::_direction

View vector (which is negated Z vector of local coordinate system in world space)

float neo::collision::Frustum::_zNear

Near plane distance along direction

float neo::collision::Frustum::_zFar

Far plane distance along direction

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

• frustum.h

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