al::Frustum< T > Class Template Reference

Rectangular frustum. More...

#include <C:/Users/Andres/source/repos/casm_viewer/external/tinc/external/allolib/include/al/math/al_Frustum.hpp>

Public Types
enum	{   TOP = 0 , BOTTOM , LEFT , RIGHT ,   NEARP , FARP }
enum	{ OUTSIDE = 0 , INTERSECT , INSIDE }

Public Member Functions
const Vec< 3, T > &	corner (int i) const
const Vec< 3, T > &	corner (int i0, int i1, int i2) const
template<class U >
Vec< 3, T >	getPoint (const Vec< 3, U > &frac) const
	Get point in frustum corresponding to fraction along edges.
template<class U >
Vec< 3, T >	getPoint (const U &fracx, const U &fracy, const U &fracz) const
	Get point in frustum corresponding to fraction along edges.
int	testPoint (const Vec< 3, T > &p) const
	Test whether point is in frustum.
int	testSphere (const Vec< 3, T > &center, float radius) const
	Test whether sphere is in frustum.
int	testBox (const Vec< 3, T > &xyz, const Vec< 3, T > &dim) const
	Test whether axis-aligned box is in frustum. More...
template<class V >
void	boundingBox (Vec< 3, V > &xyz, Vec< 3, V > &dim) const
	Get axis-aligned bounding box.
Vec< 3, T >	center () const
	Returns center of frustum.
void	computePlanes ()
	Compute planes based on frustum corners (planes face to inside) More...

Public Attributes
Vec< 3, T >	ntl
Vec< 3, T >	ntr
Vec< 3, T >	nbl
Vec< 3, T >	nbr
Vec< 3, T >	ftl
Vec< 3, T >	ftr
Vec< 3, T >	fbl
Vec< 3, T >	fbr
	Corners.
Plane< T >	pl [6]
	Faces.

Detailed Description

template<class T>
class al::Frustum< T >

Rectangular frustum.

A frustum has the shape of a four-sided pyramid truncated at the top. For graphics, this specifies the viewing frustum of a camera.

Source code adapted from: "OpenGL @ Lighthouse 3D - View Frustum Culling Tutorial", http://www.lighthouse3d.com/opengl/viewfrustum/index.php?intro

Definition at line 65 of file al_Frustum.hpp.

Member Function Documentation

computePlanes()

template<class T >

void al::Frustum< T >::computePlanes

Compute planes based on frustum corners (planes face to inside)

The plane normals are computed assuming a right-hand coordinate system.

Definition at line 147 of file al_Frustum.hpp.

testBox()

template<class T >

int al::Frustum< T >::testBox	(	const Vec< 3, T > &	xyz,
		const Vec< 3, T > &	dim
	)		const

Test whether axis-aligned box is in frustum.

This will always tell you if the box is in or intersects the frustum. Sometimes, boxes that are really outside will not be detected as so, thus returning a false positive.

Definition at line 178 of file al_Frustum.hpp.

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

• al_Frustum.hpp