Scene Class Reference

#include <scene.hh>

Data Structures
struct	SceneViewStackEntry

Public Member Functions
void	SetFog (bool f)
bool	GetFog () const
void	SetFogColor (const Color &c)
Color	GetFogColor () const
void	SetShadow (bool f)
bool	GetShadow () const
void	SetShadowQuality (int q)
int	GetShadowQuality () const
void	SetShadowWeight (float w)
float	GetShadowWeight () const
void	SetDepthDarkening (bool f)
void	SetDepthDarkeningWeight (float f)
void	SetAmbientOcclusion (bool f)
bool	GetAmbientOcclusion () const
void	SetAmbientOcclusionWeight (float f)
float	GetAmbientOcclusionWeight () const
void	SetAmbientOcclusionMode (uint m)
uint	GetAmbientOcclusionMode () const
void	SetAmbientOcclusionQuality (uint q)
uint	GetAmbientOcclusionQuality () const
void	SetShadingMode (const std::string &smode)
void	SetStereoMode (unsigned int mode)
int	GetStereoMode () const
void	SetStereoFlip (bool f)
bool	GetStereoFlip () const
void	SetStereoView (int)
int	GetStereoView () const
void	SetStereoIOD (Real)
Real	GetStereoIOD () const
void	SetStereoDistance (Real)
Real	GetStereoDistance () const
void	SetStereoAlg (unsigned int)
unsigned int	GetStereoAlg () const
void	SetLightDir (const geom::Vec3 &dir)
void	SetLightProp (const Color &amb, const Color &diff, const Color &spec)
void	SetLightProp (float amb, float diff, float spec)
geom::Vec3	GetLightDir () const
geom::Mat3	GetLightRot () const
void	SetSelectionMode (uint m)
uint	GetSelectionMode () const
void	Export (const String &fname, unsigned int w, unsigned int h, bool transparent=false)
void	Export (const String &fname, bool transparent=false)
void	ExportPov (const std::string &fname, const std::string &wdir=".")
void	Export (Exporter *ex) const
void	OnInput (const InputEvent &e)
void	InitGL (bool full=true)
void	Resize (int w, int h)
void	Pick (int mx, int my, int mask)
float	GetDefaultTextSize ()
std::pair< GfxObjP, mol::AtomHandle >	PickAtom (int mx, int my)
void	RenderGL ()
void	RequestRedraw ()
void	StatusMessage (const String &s)
void	SetViewport (int w, int h)
void	SetBackground (const Color &c)
Color	GetBackground () const
void	SetCenter (const geom::Vec3 &cen)
geom::Vec3	GetCenter () const
void	CenterOn (const String &s)
void	CenterOn (const GfxObjP &s)
geom::Vec3	Project (const geom::Vec3 &v, bool ignore_vp=false) const
geom::Vec3	UnProject (const geom::Vec3 &v, bool ignore_vp=false) const
geom::AlignedCuboid	GetBoundingBox (const mol::Transform &tf) const
mol::Transform	GetTransform () const
void	SetTransform (const mol::Transform &t)
geom::Mat4	GetRTC () const
void	SetRTC (const geom::Mat4 &rtc)
void	PushView ()
void	PopView ()
void	ResetProjection ()
void	Register (GLWinBase *win)
void	Unregister (GLWinBase *win)
void	AttachObserver (SceneObserver *o)
void	DetachObserver (SceneObserver *o)
bool	InOffscreenMode () const
void	SetTestMode (bool t)
float	ElapsedTime () const
Viewport	GetViewport () const
bool	StartOffscreenMode (unsigned int w, unsigned int h)
void	StopOffscreenMode ()
void	SetShowCenter (bool f)
bool	GetShowCenter () const
void	SetFixCenter (bool f)
bool	GetFixCenter () const
void	SetBlur (uint n)
void	BlurSnapshot ()
void	RenderText (const TextPrim &t)
void	SetBeacon (int wx, int wy)
void	SetBeaconOff ()
clipping planes, fog and field-of-view
float	GetNear () const
void	SetNear (float n)
float	GetFar () const
void	SetFar (float f)
void	SetNearFar (float n, float f)
void	SetFOV (float f)
float	GetFOV () const
void	SetFogNearOffset (float o)
float	GetFogNearOffset () const
void	SetFogFarOffset (float o)
float	GetFogFarOffset () const
void	SetFogOffsets (float no, float fo)
void	Autoslab (bool fast=false, bool redraw=true)
void	AutoslabMax ()
void	AutoAutoslab (bool f)
bool	GetAutoAutoslab () const
scene graph
void	Add (const GfxNodeP &go, bool redraw=true)
void	Remove (const GfxNodeP &go)
void	Remove (const String &name)
void	RemoveAll ()
bool	Rename (const String &old_name, const String &new_name)
GfxObjP	operator[] (const String &name)
bool	HasNode (const String &name) const
void	Apply (const InputEvent &ie, bool request_redraw=true)
void	Apply (GfxNodeVisitor &v) const
size_t	GetNodeCount () const
GfxNodeP	GetRootNode () const

Static Public Member Functions
static Scene &	Instance ()

Protected Member Functions
void	ObjectChanged (const String &name)
void	SelectionChanged (const String &name, const mol::EntityView &sel)
void	NodeTransformed (const GfxObjP &object)
void	NodeAdded (const GfxNodeP &node)
void	RenderModeChanged (const String &name)

Friends
class	impl::SceneFX
class	GfxObj
class	GfxNode
class	Entity

---

Detailed Description

main class for organization and root for the graphical display

The scene manages graphical objects for rendering. Typical graphical objects include entities, isocontoured maps, density slabs, molecular surfaces, or primitives such as cuboids, quads and lines. The nodes are organized in a tree-like structure whose root can obtained with GetRootNode().

The center of the eye is controlled with SetCenter() and CenterOn().

By default, the near and far clipping planes are adjusted such that they contain all visible objects in the scene. This behaviour can be turned of by disabling the AutoAutoslab(). The near and far clipping plane can then be adjusted manually.

Definition at line 79 of file scene.hh.

---

Member Function Documentation

void Add	(	const GfxNodeP &	go,
		bool	redraw = true
	)

add graphical object to scene

void Apply	(	const InputEvent &	ie,
		bool	request_redraw = true
	)

actual event handling for scene (internal use)

void Apply

(

GfxNodeVisitor &

v

)

const

apply node visitor to root node

void AttachObserver

(

SceneObserver *

o

)

observer interface (internal use)

void AutoAutoslab

(

bool

f

)

turn on automatic auto-slabbing (using the fast bounding box alg)

void Autoslab	(	bool	fast = false,
		bool	redraw = true
	)

adjust near and far clipping plane to fit visible objects

void AutoslabMax

(

)

adjust clipping planes to fix maximal extent of all objects even under rotation

void BlurSnapshot

(

)

experimental feature

void CenterOn

(

const String &

s

)

center on object of given name

void CenterOn

(

const GfxObjP &

s

)

center given object

void DetachObserver

(

SceneObserver *

o

)

observer interface (internal use)

float ElapsedTime

(

)

const

void Export	(	const String &	fname,
		unsigned int	w,
		unsigned int	h,
		bool	transparent = false
	)

export scene into a bitmap, rendering into offscreen of given size if a main offscreen buffer is active (

See also:

StartOffscreenMode), then the dimensions here are ignored

void Export	(	const String &	fname,
		bool	transparent = false
	)

export snapshot of current scene

void Export

(

Exporter *

ex

)

const

export scene via exporter

void ExportPov	(	const std::string &	fname,
		const std::string &	wdir = "."
	)

export scene into povray files named fname.pov and fname.inc

bool GetAmbientOcclusion

(

)

const

experimental feature

uint GetAmbientOcclusionMode

(

)

const

experimental feature

uint GetAmbientOcclusionQuality

(

)

const

experimental feature

float GetAmbientOcclusionWeight

(

)

const

experimental feature

bool GetAutoAutoslab ( ) const

inline

get current state of automatic auto-slabbing

Definition at line 197 of file scene.hh.

Color GetBackground

(

)

const

get background color

geom::AlignedCuboid GetBoundingBox

(

const mol::Transform &

tf

)

const

return bounding box of scene under given transform

geom::Vec3 GetCenter

(

)

const

retrieve center

float GetDefaultTextSize

(

)

float GetFar

(

)

const

get far clipping plane

bool GetFixCenter ( ) const

inline

return flag

Definition at line 430 of file scene.hh.

bool GetFog

(

)

const

check fog status

Color GetFogColor

(

)

const

get the fog color

float GetFogFarOffset

(

)

const

See also:

SetFogFarOffset

float GetFogNearOffset

(

)

const

See also:

SetFogNearOffset

float GetFOV

(

)

const

geom::Vec3 GetLightDir ( ) const

inline

get main light direction

Definition at line 240 of file scene.hh.

geom::Mat3 GetLightRot ( ) const

inline

get main light orientation (internal debugging use)

Definition at line 242 of file scene.hh.

float GetNear

(

)

const

get near clipping plane

size_t GetNodeCount

(

)

const

get total number of nodes in scene

To obtain the number of top-level nodes, use GfxNode::GetChildCount() of the root node

GfxNodeP GetRootNode

(

)

const

get root node of scene graph

geom::Mat4 GetRTC

(

)

const

returns a compact, internal representation of the scene orientation

uint GetSelectionMode

(

)

const

bool GetShadow

(

)

const

get shadow mapping status

int GetShadowQuality

(

)

const

get shadow quality

float GetShadowWeight

(

)

const

get shadow strength

bool GetShowCenter ( ) const

inline

Definition at line 424 of file scene.hh.

unsigned int GetStereoAlg ( ) const

inline

return current stereo algorithm

Definition at line 231 of file scene.hh.

Real GetStereoDistance ( ) const

inline

return current stereo distance offset from COR

Definition at line 225 of file scene.hh.

bool GetStereoFlip ( ) const

inline

return invert flag for stereo

Definition at line 209 of file scene.hh.

Real GetStereoIOD ( ) const

inline

return current stereo eye distance

Definition at line 220 of file scene.hh.

int GetStereoMode ( ) const

inline

Definition at line 204 of file scene.hh.

int GetStereoView ( ) const

inline

return current stereo view mode

Definition at line 215 of file scene.hh.

mol::Transform GetTransform

(

)

const

get full underlying transformation

Viewport GetViewport

(

)

const

bool HasNode

(

const String &

name

)

const

whether the scene contains a node of the given name

void InitGL

(

bool

full = true

)

initialize OpenGL after context has been setup (internal use)

bool InOffscreenMode

(

)

const

static Scene& Instance ( )

static

void NodeAdded ( const GfxNodeP &  node )

protected

void NodeTransformed ( const GfxObjP &  object )

protected

void ObjectChanged ( const String &  name )

protected

void OnInput

(

const InputEvent &

e

)

entry point for gui events (internal use)

GfxObjP operator[]

(

const String &

name

)

retrieve gfx object by name

void Pick	(	int	mx,
		int	my,
		int	mask
	)

pick at given mouse coords

std::pair<GfxObjP, mol::AtomHandle> PickAtom	(	int	mx,
		int	my
	)

pick atom at given mouse coord

void PopView

(

)

retrieve a previously pushed orientation

geom::Vec3 Project	(	const geom::Vec3 &	v,
		bool	ignore_vp = false
	)		const

calculate projection of a point into the scene

void PushView

(

)

push the current orientation onto a stack

void Register

(

GLWinBase *

win

)

gui glue interface (internal use)

void Remove

(

const GfxNodeP &

go

)

remove graphical object from scene remove graphical object from the scene

void Remove

(

const String &

name

)

remove graphical object from the scene

void RemoveAll

(

)

remove all objects from the scene

bool Rename	(	const String &	old_name,
		const String &	new_name
	)

rename an existing graphical object defunct for now

void RenderGL

(

)

render all gl objects (internal use)

void RenderModeChanged ( const String &  name )

protected

void RenderText

(

const TextPrim &

t

)

internal use

void RequestRedraw

(

)

request redraw of gl scene

void ResetProjection

(

)

brief re-generates the projection matrix (internal use)

void Resize	(	int	w,
		int	h
	)

handle new viewport size (internal use)

void SelectionChanged ( const String &  name, const mol::EntityView &  sel  )

protected

void SetAmbientOcclusion

(

bool

f

)

experimental feature

void SetAmbientOcclusionMode

(

uint

m

)

experimental feature

void SetAmbientOcclusionQuality

(

uint

q

)

experimental feature

void SetAmbientOcclusionWeight

(

float

f

)

experimental feature

void SetBackground

(

const Color &

c

)

set background color

void SetBeacon	(	int	wx,
		int	wy
	)

experimental feature

void SetBeaconOff

(

)

experimental feature

void SetBlur

(

uint

n

)

experimental feature

void SetCenter

(

const geom::Vec3 &

cen

)

center rotation on the given point

void SetDepthDarkening

(

bool

f

)

experimental feature

void SetDepthDarkeningWeight

(

float

f

)

experimental feature

void SetFar

(

float

f

)

set far clipping plane

void SetFixCenter ( bool  f )

inline

if true fix center of rotation upon input induced shift

Definition at line 427 of file scene.hh.

void SetFog

(

bool

f

)

turn fog on or off

void SetFogColor

(

const Color &

c

)

set the fog color

void SetFogFarOffset

(

float

o

)

offset between far clipping plane and end of fog

void SetFogNearOffset

(

float

o

)

offset between near clipping plane and start of fog

void SetFogOffsets	(	float	no,
		float	fo
	)

convenciene function to set fog near and far offset

void SetFOV

(

float

f

)

set field of view angle

void SetLightDir

(

const geom::Vec3 &

dir

)

set main light direction

void SetLightProp	(	const Color &	amb,
		const Color &	diff,
		const Color &	spec
	)

set ambient, diffuse and specular light color

void SetLightProp	(	float	amb,
		float	diff,
		float	spec
	)

set ambient, diffuse and specular light intensity

void SetNear

(

float

n

)

set near clipping plane

void SetNearFar	(	float	n,
		float	f
	)

set near and far clipping plane at once

void SetRTC

(

const geom::Mat4 &

rtc

)

sets a previously retrieved orientation

void SetSelectionMode

(

uint

m

)

set the selection mode

void SetShadingMode

(

const std::string &

smode

)

select shading mode one of fallback, basic, default, hf, toon1, toon2

void SetShadow

(

bool

f

)

turn shadow mapping on and off

void SetShadowQuality

(

int

q

)

shadow quality from 0 (low) to 3 (high), default=1

void SetShadowWeight

(

float

w

)

multiplier for shadow strength

void SetShowCenter

(

bool

f

)

show center of rotation of true

void SetStereoAlg

(

unsigned

int

)

set stereo algorithm one of 0 (default) or 1

void SetStereoDistance

(

Real

)

set stereo distance offset from COR

void SetStereoFlip

(

bool

f

)

invert stereo eyes for stereo mode=0

void SetStereoIOD

(

Real

)

set stereo eye distance

void SetStereoMode

(

unsigned int

mode

)

set stereo mode one of 0 (off), 1 (quad-buffered) 2 (interlaced (for special monitors))

void SetStereoView

(

int

)

stereo view mode one of 0 (center), -1 (left), 1 (right)

void SetTestMode

(

bool

t

)

switch into test mode (internal use)

void SetTransform

(

const mol::Transform &

t

)

set transform

void SetViewport	(	int	w,
		int	h
	)

set the viewport; the mapping to the visible window (internal use)

bool StartOffscreenMode	(	unsigned int	w,
		unsigned int	h
	)

This method has two different tasks.

During interactive rendering, it facilitates export into an offscreen buffer with Scene::Export(file,width,height) by avoiding repeated initializations of the GL state, e.g. during animation rendering.

During batch mode, this is the only way to get meaningful functionality with the gfx module

returns true upon success and false upon failure

void StatusMessage

(

const String &

s

)

send status message to gui

void StopOffscreenMode

(

)

stops offline rendering in interactive mode

geom::Vec3 UnProject	(	const geom::Vec3 &	v,
		bool	ignore_vp = false
	)		const

calculate unprojected point out of the scene

void Unregister

(

GLWinBase *

win

)

gui glue interface (internal use)

---

Friends And Related Function Documentation

friend class Entity

friend

Definition at line 450 of file scene.hh.

friend class GfxNode

friend

Definition at line 447 of file scene.hh.

friend class GfxObj

friend

Definition at line 446 of file scene.hh.

friend class impl::SceneFX

friend

Definition at line 80 of file scene.hh.

---

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

• stage/include/ost/gfx/scene.hh