Creation and modification of an isolated (positional) light source. It is also defined by the color and two attenuation factors ConstAttentuation() and LinearAttentuation(). The resulting attenuation factor determining the illumination of a surface depends on the following formula: More...
#include <V3d_PositionalLight.hxx>
Inheritance diagram for V3d_PositionalLight:
Public Member Functions | |
| V3d_PositionalLight (const gp_Pnt &thePos, const Quantity_Color &theColor=Quantity_NOC_WHITE) | |
| Creates an isolated light source in the viewer with default attenuation factors (1.0, 0.0). More... | |
 Public Member Functions inherited from Graphic3d_CLight | |
| Graphic3d_CLight (Graphic3d_TypeOfLightSource theType) | |
| Empty constructor, which should be followed by light source properties configuration. More... | |
| void | CopyFrom (const Handle< Graphic3d_CLight > &theLight) |
| Copy parameters from another light source excluding source type. More... | |
| Graphic3d_TypeOfLightSource | Type () const |
| Returns the Type of the Light, cannot be changed after object construction. More... | |
| const TCollection_AsciiString & | Name () const |
| Returns light source name; empty string by default. More... | |
| void | SetName (const TCollection_AsciiString &theName) |
| Sets light source name. More... | |
| const Quantity_Color & | Color () const |
| Returns the color of the light source; WHITE by default. More... | |
| void | SetColor (const Quantity_Color &theColor) |
| Defines the color of a light source by giving the basic color. More... | |
| Standard_Boolean | IsEnabled () const |
| Check that the light source is turned on; TRUE by default. This flag affects all occurrences of light sources, where it was registered and activated; so that it is possible defining an active light in View which is actually in disabled state. More... | |
| void | SetEnabled (Standard_Boolean theIsOn) |
| Change enabled state of the light state. This call does not remove or deactivate light source in Views/Viewers; instead it turns it OFF so that it just have no effect. More... | |
| Standard_Boolean | ToCastShadows () const |
| Return TRUE if shadow casting is enabled; FALSE by default. Has no effect in Ray-Tracing rendering mode. More... | |
| void | SetCastShadows (Standard_Boolean theToCast) |
| Enable/disable shadow casting. More... | |
| Standard_Boolean | IsHeadlight () const |
| Returns true if the light is a headlight; FALSE by default. Headlight flag means that light position/direction are defined not in a World coordinate system, but relative to the camera orientation. More... | |
| Standard_Boolean | Headlight () const |
| Alias for IsHeadlight(). More... | |
| void | SetHeadlight (Standard_Boolean theValue) |
| Setup headlight flag. More... | |
| const gp_Pnt & | Position () const |
| Returns location of positional/spot light; (0, 0, 0) by default. More... | |
| void | SetPosition (const gp_Pnt &thePosition) |
| Setup location of positional/spot light. More... | |
| void | Position (Standard_Real &theX, Standard_Real &theY, Standard_Real &theZ) const |
| Returns location of positional/spot light. More... | |
| void | SetPosition (Standard_Real theX, Standard_Real theY, Standard_Real theZ) |
| Setup location of positional/spot light. More... | |
| Standard_ShortReal | ConstAttenuation () const |
| Returns constant attenuation factor of positional/spot light source; 1.0f by default. Distance attenuation factors of reducing positional/spot light intensity depending on the distance from its position: More... | |
| Standard_ShortReal | LinearAttenuation () const |
| Returns linear attenuation factor of positional/spot light source; 0.0 by default. Distance attenuation factors of reducing positional/spot light intensity depending on the distance from its position: More... | |
| void | Attenuation (Standard_Real &theConstAttenuation, Standard_Real &theLinearAttenuation) const |
| Returns the attenuation factors. More... | |
| void | SetAttenuation (Standard_ShortReal theConstAttenuation, Standard_ShortReal theLinearAttenuation) |
| Defines the coefficients of attenuation; values should be >= 0.0 and their summ should not be equal to 0. More... | |
| gp_Dir | Direction () const |
| Returns direction of directional/spot light. More... | |
| void | SetDirection (const gp_Dir &theDir) |
| Sets direction of directional/spot light. More... | |
| void | Direction (Standard_Real &theVx, Standard_Real &theVy, Standard_Real &theVz) const |
| Returns the theVx, theVy, theVz direction of the light source. More... | |
| void | SetDirection (Standard_Real theVx, Standard_Real theVy, Standard_Real theVz) |
| Sets direction of directional/spot light. More... | |
| const gp_Pnt & | DisplayPosition () const |
| Returns location of positional/spot/directional light, which is the same as returned by Position(). More... | |
| void | SetDisplayPosition (const gp_Pnt &thePosition) |
| Setup location of positional/spot/directional light, which is the same as SetPosition() but allows directional light source (technically having no position, but this point can be used for displaying light source presentation). More... | |
| Standard_ShortReal | Angle () const |
| Returns an angle in radians of the cone created by the spot; 30 degrees by default. More... | |
| void | SetAngle (Standard_ShortReal theAngle) |
| Angle in radians of the cone created by the spot, should be within range (0.0, M_PI). More... | |
| Standard_ShortReal | Concentration () const |
| Returns intensity distribution of the spot light, within [0.0, 1.0] range; 1.0 by default. This coefficient should be converted into spotlight exponent within [0.0, 128.0] range: More... | |
| void | SetConcentration (Standard_ShortReal theConcentration) |
| Defines the coefficient of concentration; value should be within range [0.0, 1.0]. More... | |
| Standard_ShortReal | Intensity () const |
| Returns the intensity of light source; 1.0 by default. More... | |
| void | SetIntensity (Standard_ShortReal theValue) |
| Modifies the intensity of light source, which should be > 0.0. More... | |
| Standard_ShortReal | Smoothness () const |
| Returns the smoothness of light source (either smoothing angle for directional light or smoothing radius in case of positional light); 0.0 by default. More... | |
| void | SetSmoothRadius (Standard_ShortReal theValue) |
| Modifies the smoothing radius of positional/spot light; should be >= 0.0. More... | |
| void | SetSmoothAngle (Standard_ShortReal theValue) |
| Modifies the smoothing angle (in radians) of directional light source; should be within range [0.0, M_PI/2]. More... | |
| bool | HasRange () const |
| Returns TRUE if maximum distance of point light source is defined. More... | |
| Standard_ShortReal | Range () const |
| Returns maximum distance on which point light source affects to objects and is considered during illumination calculations. 0.0 means disabling range considering at all without any distance limits. Has sense only for point light sources (positional and spot). More... | |
| void | SetRange (Standard_ShortReal theValue) |
| Modifies maximum distance on which point light source affects to objects and is considered during illumination calculations. Positional and spot lights are only point light sources. 0.0 means disabling range considering at all without any distance limits. More... | |
| const TCollection_AsciiString & | GetId () const |
| const Graphic3d_Vec4 & | PackedParams () const |
| Packed light parameters. More... | |
| const Graphic3d_Vec4 & | PackedColor () const |
| Returns the color of the light source with dummy Alpha component, which should be ignored. More... | |
| const Graphic3d_Vec4 & | PackedDirectionRange () const |
| Returns direction of directional/spot light and range for positional/spot light in alpha channel. More... | |
| Graphic3d_Vec3 | PackedDirection () const |
| Returns direction of directional/spot light. More... | |
| Standard_Size | Revision () const |
| void | DumpJson (Standard_OStream &theOStream, Standard_Integer theDepth=-1) const |
| Dumps the content of me into the stream. More... | |
| Public Member Functions inherited from Standard_Transient | |
| Standard_Transient () | |
| Empty constructor. More... | |
| Standard_Transient (const Standard_Transient &) | |
| Copy constructor – does nothing. More... | |
| Standard_Transient & | operator= (const Standard_Transient &) |
| Assignment operator, needed to avoid copying reference counter. More... | |
| virtual | ~Standard_Transient () |
| Destructor must be virtual. More... | |
| virtual void | Delete () const |
| Memory deallocator for transient classes. More... | |
| virtual const opencascade::handle< Standard_Type > & | DynamicType () const |
| Returns a type descriptor about this object. More... | |
| Standard_Boolean | IsInstance (const opencascade::handle< Standard_Type > &theType) const |
| Returns a true value if this is an instance of Type. More... | |
| Standard_Boolean | IsInstance (const Standard_CString theTypeName) const |
| Returns a true value if this is an instance of TypeName. More... | |
| Standard_Boolean | IsKind (const opencascade::handle< Standard_Type > &theType) const |
| Returns true if this is an instance of Type or an instance of any class that inherits from Type. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More... | |
| Standard_Boolean | IsKind (const Standard_CString theTypeName) const |
| Returns true if this is an instance of TypeName or an instance of any class that inherits from TypeName. Note that multiple inheritance is not supported by OCCT RTTI mechanism. More... | |
| Standard_Transient * | This () const |
| Returns non-const pointer to this object (like const_cast). For protection against creating handle to objects allocated in stack or call from constructor, it will raise exception Standard_ProgramError if reference counter is zero. More... | |
| Standard_Integer | GetRefCount () const |
| Get the reference counter of this object. More... | |
| void | IncrementRefCounter () const |
| Increments the reference counter of this object. More... | |
| Standard_Integer | DecrementRefCounter () const |
| Decrements the reference counter of this object; returns the decremented value. More... | |
Additional Inherited Members | |
| Public Types inherited from Standard_Transient | |
| typedef void | base_type |
| Returns a type descriptor about this object. More... | |
| Static Public Member Functions inherited from Standard_Transient | |
| static const char * | get_type_name () |
| Returns a type descriptor about this object. More... | |
| static const opencascade::handle< Standard_Type > & | get_type_descriptor () |
| Returns type descriptor of Standard_Transient class. More... | |
| Protected Member Functions inherited from V3d_PositionLight | |
| V3d_PositionLight (Graphic3d_TypeOfLightSource theType) | |
| Protected constructor. More... | |
| Protected Attributes inherited from Graphic3d_CLight | |
| TCollection_AsciiString | myId |
| resource id More... | |
| TCollection_AsciiString | myName |
| user given name More... | |
| gp_Pnt | myPosition |
| light position More... | |
| Quantity_ColorRGBA | myColor |
| light color More... | |
| Graphic3d_Vec4 | myDirection |
| direction of directional/spot light More... | |
| Graphic3d_Vec4 | myParams |
| packed light parameters More... | |
| Standard_ShortReal | mySmoothness |
| radius for point light or cone angle for directional light More... | |
| Standard_ShortReal | myIntensity |
| intensity multiplier for light More... | |
| const Graphic3d_TypeOfLightSource | myType |
| Graphic3d_TypeOfLightSource enumeration. More... | |
| Standard_Size | myRevision |
| modification counter More... | |
| Standard_Boolean | myIsHeadlight |
| flag to mark head light More... | |
| Standard_Boolean | myIsEnabled |
| enabled state More... | |
| Standard_Boolean | myToCastShadows |
| casting shadows is requested More... | |
Detailed Description
Creation and modification of an isolated (positional) light source. It is also defined by the color and two attenuation factors ConstAttentuation() and LinearAttentuation(). The resulting attenuation factor determining the illumination of a surface depends on the following formula:
F = 1 / (ConstAttenuation() + LinearAttenuation() * Distance)
Where Distance is the distance of the isolated source from the surface.
Constructor & Destructor Documentation
◆ V3d_PositionalLight()
| V3d_PositionalLight::V3d_PositionalLight | ( | const gp_Pnt & | thePos, |
| const Quantity_Color & | theColor = Quantity_NOC_WHITE |
||
| ) |
Creates an isolated light source in the viewer with default attenuation factors (1.0, 0.0).
The documentation for this class was generated from the following file:
