Frustum Class Reference

Represent a 3D frustum, volume defined by the intersection of six planes. More...

#include <Bounds.hpp>

Public Member Functions
	Frustum (const glm::mat4 &vp)
bool	intersects (const BoundingBox &box) const

Static Public Member Functions
static glm::mat4	perspective (float fov, float ratio, float near, float far)
static glm::mat4	ortho (float left, float right, float bottom, float top, float near, float far)

Private Types
enum	FrustumPlane : uint {   LEFT = 0 , RIGHT = 1 , TOP = 2 , BOTTOM = 3 ,   NEAR = 4 , FAR = 5 , COUNT = 6 }

Private Attributes
std::array< glm::vec4, FrustumPlane::COUNT >	_planes
	Frustum hyperplane coefficients.
std::array< glm::vec3, 8 >	_corners
	Frustum corners.

Detailed Description

Represent a 3D frustum, volume defined by the intersection of six planes.

Member Enumeration Documentation

FrustumPlane

enum Frustum::FrustumPlane : uint

private

Helper enum for the frustum plane locations.

Constructor & Destructor Documentation

Frustum()

Frustum::Frustum

(

const glm::mat4 &

vp

)

Create a frustum from a view-projection matrix.

Parameters

vp	the matrix defining the frustum

Member Function Documentation

intersects()

bool Frustum::intersects

(

const BoundingBox &

box

)

const

Indicate if a bounding box intersect this frustum.

Parameters

box	the bounding box to test

Returns

true if the bounding box intersects the frustum.

Todo:

Implement frustum corner checks to weed out more false positives.

ortho()

glm::mat4 Frustum::ortho ( float  left, float  right, float  bottom, float  top, float  near, float  far  )

static

Generate an orthographic projection matrix, correctly oriented for the rendering API.

Parameters

left	left plane distance from the center
right	right plane distance from the center
bottom	bottom plane distance from the center
top	top plane distance from the center
near	the near plane distance
far	the far plane distance

Returns

the projection matrix

perspective()

glm::mat4 Frustum::perspective ( float  fov, float  ratio, float  near, float  far  )

static

Generate a perspective projection matrix, correctly oriented for the rendering API.

Parameters

fov	vertical field of view in radians
ratio	aspect ratio
near	the near plane distance
far	the far plane distance

Returns

the projection matrix

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

• src/engine/resources/Bounds.hpp
• src/engine/resources/Bounds.cpp