the camera view culling frustum More...

#include <CameraFrustum.h>

Inheritance diagram for ParaEngine::CCameraFrustum:

Public Member Functions
virtual void	UpdateFrustum (const Matrix4 *matViewProj, bool bInversedMatrix=false, float fNearPlane=0.f, float fFarPlane=1.f)
	build a frustum from a camera (projection, or viewProjection) matrix More...

float	GetViewDepth ()

bool	TestBox_sphere_far_plane (const CShapeAABB *box) const
	this is the same as the TestBox, except that the far plane is treated as a sphere plane whose radius is m_fViewDepth. More...

int	TestBoxInsideFarPlane (const CShapeAABB *box) const
	this is the same as TestBox, except that the box must be completely inside the far plane. More...

Public Member Functions inherited from ParaEngine::CShapeFrustum
	CShapeFrustum (const Matrix4 *matrix)
	build a frustum from a camera (projection, or viewProjection) matrix

bool	TestSphere (const CShapeSphere *sphere) const

bool	TestSweptSphere (const CShapeSphere sphere, const Vector3 sweepDir) const

int	TestBox (const CShapeAABB *box) const
	Tests if an AABB is inside/intersecting the view frustum. More...

Plane &	GetPlane (int nIndex)
	Get a given frustum plane. More...

bool	CullPointWithPlane (int iPlane, const Vector3 *vPos)
	whether the point is inside a given plane. More...

bool	CullPointsWithFrustum (Vector3 *pVecBounds, int nCount)
	return true if any of the point is inside the frustum

Public Attributes
float	m_fViewDepth
	the distance between the near plane and far plane in world coordinate. More...

Vector3	m_vEyeOrigin
	the eye origin

Vector2	v2DCircleCenter
	2D circle center. More...

float	v2DCircleRadius
	the radius of the 2D circle. More...

CShapeSphere	m_boundingSphere
	bounding sphere

Public Attributes inherited from ParaEngine::CShapeFrustum
Vector3	vecFrustum [8]
	corners of the view frustum

Plane	planeFrustum [6]
	planes of the view frustum

int	nVertexLUT [6]

Additional Inherited Members
Static Public Member Functions inherited from ParaEngine::CShapeFrustum
static bool	SweptSpherePlaneIntersect (float &t0, float &t1, const Plane plane, const CShapeSphere sphere, const Vector3 *sweepDir)
	this function tests if the projection of a bounding sphere along the light direction intersects the view frustum

Detailed Description

the camera view culling frustum

Member Function Documentation

§ TestBox_sphere_far_plane()

bool ParaEngine::CCameraFrustum::TestBox_sphere_far_plane ( const CShapeAABB * box ) const

this is the same as the TestBox, except that the far plane is treated as a sphere plane whose radius is m_fViewDepth.

this is currently used by terrain view frustum

§ TestBoxInsideFarPlane()

int ParaEngine::CCameraFrustum::TestBoxInsideFarPlane ( const CShapeAABB * box ) const

this is the same as TestBox, except that the box must be completely inside the far plane.

Returns: : 2 requires more testing(meaning either intersecting) 1 is fast accept(meaning the box is fully inside the frustum) 0 is fast reject,

§ UpdateFrustum()

void ParaEngine::CCameraFrustum::UpdateFrustum	(	const Matrix4 *	matViewProj,
		bool	bInversedMatrix = `false`,
		float	fNearPlane = `0.f`,
		float	fFarPlane = `1.f`
	)

virtual

build a frustum from a camera (projection, or viewProjection) matrix

Parameters

matViewProj	the view projection matrix.
bInversedMatrix	if this is true, matViewProj is the inverse of standard matViewProj
fNearPlane	the near plane in viewProjection coordinate, default to 0.f
fFarPlane	the far plane in viewProjection coordinate, default to 1.f

Reimplemented from ParaEngine::CShapeFrustum.

Member Data Documentation

§ m_fViewDepth

float ParaEngine::CCameraFrustum::m_fViewDepth

the distance between the near plane and far plane in world coordinate.

§ v2DCircleCenter

Vector2 ParaEngine::CCameraFrustum::v2DCircleCenter

2D circle center.

It is the center of the smallest circle on the y=0 plane, which contains the Frustum projection on to the 2D plane. The information is used for rough object-level culling.

§ v2DCircleRadius

float ParaEngine::CCameraFrustum::v2DCircleRadius

the radius of the 2D circle.

v2DCircleCenter

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

Client/trunk/ParaEngineClient/3dengine/CameraFrustum.h
Client/trunk/ParaEngineClient/3dengine/CameraFrustum.cpp

Public Member Functions

Public Attributes

Additional Inherited Members