Defines an axis aligned bounding box. More...

#include <SLAABBox.h>

Public Member Functions
	SLAABBox ()
	Default constructor with default zero vector initialization. More...

void	minWS (const SLVec3f &minC)

void	maxWS (const SLVec3f &maxC)

void	minOS (const SLVec3f &minC)

void	maxOS (const SLVec3f &maxC)

void	isVisible (SLbool visible)

void	sqrViewDist (SLfloat sqrVD)

SLVec3f	minWS ()

SLVec3f	maxWS ()

SLVec3f	centerWS ()

SLfloat	radiusWS ()

SLVec3f	minOS ()

SLVec3f	maxOS ()

SLVec3f	centerOS ()

SLfloat	radiusOS ()

SLbool	isVisible ()

SLfloat	sqrViewDist ()

SLRectf &	rectSS ()

void	reset ()
	Resets initial state without contents. More...

void	fromOStoWS (const SLVec3f &minOS, const SLVec3f &maxOS, const SLMat4f &wm)
	Recalculate min and max after transformation in world coords. More...

void	fromWStoOS (const SLVec3f &minWS, const SLVec3f &maxWS, const SLMat4f &wmI)
	Recalculate min and max before transformation in object coords. More...

void	updateAxisWS (const SLMat4f &wm)
	Updates the axis of the owning node. More...

void	updateBoneWS (const SLMat4f &parentWM, SLbool isRoot, const SLMat4f &nodeWM)
	Updates joints axis and the bone line from the parent to us. More...

void	mergeWS (SLAABBox &bb)
	Merges the bounding box bb to this one by extending this one axis aligned. More...

void	drawWS (const SLCol4f &color)
	Draws the AABB in world space with lines in a color. More...

void	drawAxisWS ()
	Draws the axis in world space with lines in a color. More...

void	drawBoneWS ()
	Draws the joint axis and the parent bone in world space. More...

void	setCenterAndRadiusWS ()
	Calculates center & radius of the bounding sphere around the AABB. More...

void	generateVAO ()
	Generates the vertex buffer for the line visualization. More...

SLbool	isHitInOS (SLRay *ray)
	SLAABBox::isHitInWS: Ray - AABB Intersection Test in object space. More...

SLbool	isHitInWS (SLRay *ray)
	SLAABBox::isHitInWS: Ray - AABB Intersection Test in world space. More...

void	calculateRectSS ()
	Calculates the AABBs min. and max. corners in screen space. More...

SLfloat	rectCoverageInSS ()
	Calculates the bounding rectangle in screen space and returns coverage in SS. More...

Private Attributes
SLVec3f	_minWS
	Min. corner in world space. More...

SLVec3f	_minOS
	Min. corner in object space. More...

SLVec3f	_maxWS
	Max. corner in world space. More...

SLVec3f	_maxOS
	Max. corner in object space. More...

SLVec3f	_centerWS
	Center of AABB in world space. More...

SLVec3f	_centerOS
	Center of AABB in object space. More...

SLfloat	_radiusWS
	Radius of sphere around AABB in WS. More...

SLfloat	_radiusOS
	Radius of sphere around AABB in OS. More...

SLfloat	_sqrViewDist
	Squared dist. from center to viewpoint. More...

SLVec3f	_axis0WS
	World space axis center point. More...

SLVec3f	_axisXWS
	World space x-axis vector. More...

SLVec3f	_axisYWS
	World space y-axis vector. More...

SLVec3f	_axisZWS
	World space z-axis vector. More...

SLbool	_boneIsOffset
	Flag if the connection parent to us is a bone or an offset. More...

SLVec3f	_parent0WS
	World space vector to the parent position. More...

SLbool	_isVisible
	Flag if AABB is in the view frustum. More...

SLRectf	_rectSS
	Bounding rectangle in screen space. More...

SLGLVertexArrayExt	_vao
	Vertex array object for rendering. More...

Detailed Description

Defines an axis aligned bounding box.

The SLAABBox class defines an axis aligned bounding box with a minimal and maximal point. Each node (SLNode) will have an AABB the will be calculated in buildAABB. A mesh (SLMesh) will implement buildAABB and calculate the minimal and maximal coordinates in object space (stored in _minOS and _maxOS). For a fast ray-AABB intersection in world space we transform _minOS and _maxOS into world space (with the shapes world matrix) and store it in _minWS and _maxWS. For an even faster intersection test with the plane of the view frustum we calculate in addition the bounding sphere around the AABB. The radius and the center point are stored in _radiusOS/_centerOS and _radiusWS/_centerWS.

Constructor & Destructor Documentation

◆ SLAABBox()

SLAABBox::SLAABBox ( )

Default constructor with default zero vector initialization.

Member Function Documentation

◆ calculateRectSS()

void SLAABBox::calculateRectSS ( )

Calculates the AABBs min. and max. corners in screen space.

◆ centerOS()

SLVec3f SLAABBox::centerOS ( )

inline

◆ centerWS()

SLVec3f SLAABBox::centerWS ( )

inline

◆ drawAxisWS()

void SLAABBox::drawAxisWS ( )

Draws the axis in world space with lines in a color.

◆ drawBoneWS()

void SLAABBox::drawBoneWS ( )

Draws the joint axis and the parent bone in world space.

The joints x-axis is drawn in red, the y-axis in green and the z-axis in blue. If the parent displacement is a bone it is drawn in yellow, if it is a an offset displacement in magenta. See also SLAABBox::updateBoneWS.

◆ drawWS()

void SLAABBox::drawWS ( const SLCol4f & color )

Draws the AABB in world space with lines in a color.

◆ fromOStoWS()

void SLAABBox::fromOStoWS	(	const SLVec3f &	minOS,
		const SLVec3f &	maxOS,
		const SLMat4f &	wm
	)

Recalculate min and max after transformation in world coords.

◆ fromWStoOS()

void SLAABBox::fromWStoOS	(	const SLVec3f &	minWS,
		const SLVec3f &	maxWS,
		const SLMat4f &	wmI
	)

Recalculate min and max before transformation in object coords.

◆ generateVAO()

void SLAABBox::generateVAO ( )

Generates the vertex buffer for the line visualization.

◆ isHitInOS()

SLbool SLAABBox::isHitInOS ( SLRay * ray )

SLAABBox::isHitInWS: Ray - AABB Intersection Test in object space.

◆ isHitInWS()

SLbool SLAABBox::isHitInWS ( SLRay * ray )

SLAABBox::isHitInWS: Ray - AABB Intersection Test in world space.

◆ isVisible() [1/2]

SLbool SLAABBox::isVisible ( )

inline

◆ isVisible() [2/2]

void SLAABBox::isVisible ( SLbool visible )

inline

◆ maxOS() [1/2]

SLVec3f SLAABBox::maxOS ( )

inline

◆ maxOS() [2/2]

void SLAABBox::maxOS ( const SLVec3f & maxC )

inline

◆ maxWS() [1/2]

SLVec3f SLAABBox::maxWS ( )

inline

◆ maxWS() [2/2]

void SLAABBox::maxWS ( const SLVec3f & maxC )

inline

◆ mergeWS()

void SLAABBox::mergeWS ( SLAABBox & bb )

Merges the bounding box bb to this one by extending this one axis aligned.

◆ minOS() [1/2]

SLVec3f SLAABBox::minOS ( )

inline

◆ minOS() [2/2]

void SLAABBox::minOS ( const SLVec3f & minC )

inline

◆ minWS() [1/2]

SLVec3f SLAABBox::minWS ( )

inline

◆ minWS() [2/2]

void SLAABBox::minWS ( const SLVec3f & minC )

inline

◆ radiusOS()

SLfloat SLAABBox::radiusOS ( )

inline

◆ radiusWS()

SLfloat SLAABBox::radiusWS ( )

inline

◆ rectCoverageInSS()

SLfloat SLAABBox::rectCoverageInSS ( )

Calculates the bounding rectangle in screen space and returns coverage in SS.

◆ rectSS()

SLRectf & SLAABBox::rectSS ( )

inline

◆ reset()

void SLAABBox::reset ( )

Resets initial state without contents.

◆ setCenterAndRadiusWS()

void SLAABBox::setCenterAndRadiusWS ( )

Calculates center & radius of the bounding sphere around the AABB.

◆ sqrViewDist() [1/2]

SLfloat SLAABBox::sqrViewDist ( )

inline

◆ sqrViewDist() [2/2]

void SLAABBox::sqrViewDist ( SLfloat sqrVD )

inline

◆ updateAxisWS()

void SLAABBox::updateAxisWS ( const SLMat4f & wm )

Updates the axis of the owning node.

◆ updateBoneWS()

void SLAABBox::updateBoneWS	(	const SLMat4f &	parentWM,
		SLbool	isRoot,
		const SLMat4f &	nodeWM
	)

Updates joints axis and the bone line from the parent to us.

If the node has a skeleton assigned the method updates the axis and bone visualization lines of the joint. Note that joints bone line is drawn by its children. So the bone line in here is the bone from the parent to us. If this parent bone direction is not along the parents Y axis we interpret the connection not as a bone but as an offset displacement. Bones will be drawn in SLAABBox::drawBoneWS in yellow and displacements in magenta. If the joint has no parent (the root) no line is drawn.

Member Data Documentation

◆ _axis0WS

SLVec3f SLAABBox::_axis0WS

private

World space axis center point.

◆ _axisXWS

SLVec3f SLAABBox::_axisXWS

private

World space x-axis vector.

◆ _axisYWS

SLVec3f SLAABBox::_axisYWS

private

World space y-axis vector.

◆ _axisZWS

SLVec3f SLAABBox::_axisZWS

private

World space z-axis vector.

◆ _boneIsOffset

SLbool SLAABBox::_boneIsOffset

private

Flag if the connection parent to us is a bone or an offset.

◆ _centerOS

SLVec3f SLAABBox::_centerOS

private

Center of AABB in object space.

◆ _centerWS

SLVec3f SLAABBox::_centerWS

private

Center of AABB in world space.

◆ _isVisible

SLbool SLAABBox::_isVisible

private

Flag if AABB is in the view frustum.

◆ _maxOS

SLVec3f SLAABBox::_maxOS

private

Max. corner in object space.

◆ _maxWS

SLVec3f SLAABBox::_maxWS

private

Max. corner in world space.

◆ _minOS

SLVec3f SLAABBox::_minOS

private

Min. corner in object space.

◆ _minWS

SLVec3f SLAABBox::_minWS

private

Min. corner in world space.

◆ _parent0WS

SLVec3f SLAABBox::_parent0WS

private

World space vector to the parent position.

◆ _radiusOS

SLfloat SLAABBox::_radiusOS

private

Radius of sphere around AABB in OS.

◆ _radiusWS

SLfloat SLAABBox::_radiusWS

private

Radius of sphere around AABB in WS.

◆ _rectSS

SLRectf SLAABBox::_rectSS

private

Bounding rectangle in screen space.

◆ _sqrViewDist

SLfloat SLAABBox::_sqrViewDist

private

Squared dist. from center to viewpoint.

◆ _vao

SLGLVertexArrayExt SLAABBox::_vao

private

Vertex array object for rendering.

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

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ SLAABBox()

Member Function Documentation

◆ calculateRectSS()

◆ centerOS()

◆ centerWS()

◆ drawAxisWS()

◆ drawBoneWS()

◆ drawWS()

◆ fromOStoWS()

◆ fromWStoOS()

◆ generateVAO()

◆ isHitInOS()

◆ isHitInWS()

◆ isVisible() [1/2]

◆ isVisible() [2/2]

◆ maxOS() [1/2]

◆ maxOS() [2/2]

◆ maxWS() [1/2]

◆ maxWS() [2/2]

◆ mergeWS()

◆ minOS() [1/2]

◆ minOS() [2/2]

◆ minWS() [1/2]

◆ minWS() [2/2]

◆ radiusOS()

◆ radiusWS()

◆ rectCoverageInSS()

◆ rectSS()

◆ reset()

◆ setCenterAndRadiusWS()

◆ sqrViewDist() [1/2]

◆ sqrViewDist() [2/2]

◆ updateAxisWS()

◆ updateBoneWS()

Member Data Documentation

◆ _axis0WS

◆ _axisXWS

◆ _axisYWS

◆ _axisZWS

◆ _boneIsOffset

◆ _centerOS

◆ _centerWS

◆ _isVisible

◆ _maxOS

◆ _maxWS

◆ _minOS

◆ _minWS

◆ _parent0WS

◆ _radiusOS

◆ _radiusWS

◆ _rectSS

◆ _sqrViewDist

◆ _vao