evan::Frustum Class Reference

A view frustum represented by its six bounding planes. More...

#include <headers/evan/Frustum.hpp>

Public Member Functions
bool	intersects (const utility::math::AabbF &box) const
	Test whether an axis-aligned bounding box intersects the frustum.
bool	intersects (const glm::vec3 &center, float radius) const
	Test whether a bounding sphere intersects the frustum.

Static Public Member Functions
static Frustum	fromViewProjection (const glm::mat4 &viewProjection)
	Build a frustum from a combined projection × view matrix.

Detailed Description

A view frustum represented by its six bounding planes.

A Frustum is built once per view from the combined projection × view matrix and reused to reject meshes whose bounds are fully outside. Plane extraction uses the Gribb-Hartmann method and expects a Vulkan-style clip matrix (right-handed, 0..1 depth), matching the projection produced by utility::graphic::View::getProjectionMatrix().

Definition at line 40 of file Frustum.hpp.

Member Function Documentation

fromViewProjection()

static Frustum evan::Frustum::fromViewProjection ( const glm::mat4 &  viewProjection )

static

Build a frustum from a combined projection × view matrix.

Parameters

viewProjection

The combined clip-space matrix (proj * view).

Returns

The frustum bounding the visible volume.

intersects() [1/2]

bool evan::Frustum::intersects	(	const glm::vec3 &	center,
		float	radius
	)		const

Test whether a bounding sphere intersects the frustum.

Parameters

center	Center of the sphere.
radius	Radius of the sphere.

Returns

True when the sphere is (partially) inside the frustum.

intersects() [2/2]

bool evan::Frustum::intersects

(

const utility::math::AabbF &

box

)

const

Test whether an axis-aligned bounding box intersects the frustum.

A box is visible when it is inside or merely touching the frustum; only fully outside boxes are rejected. Empty boxes are always visible.

Parameters

box	The bounding box to test.

Returns

True when the box is (partially) inside the frustum.

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

• headers/evan/Frustum.hpp