Light emitted from a Point. More...
#include <PointLightSource.h>
Public Member Functions | |
| PointLightSource (const Colour &colour, const Point &location) | |
| PointLightSource constructor. More... | |
| PointLightSource (const PointLightSource &lightSource) | |
| PointLightSource copy constructor. More... | |
| ~PointLightSource () | |
| PointLightSource destructor. More... | |
| PointLightSource & | operator= (const PointLightSource &lightSource) |
| PointLightSource assignment operator. More... | |
| Colour | getIlluminationAt (const Point &point) const |
| Determine how much light reaches a Point from this PointLightSource. More... | |
| double | getDistanceToLight (const Point &point) const |
| Determine how far away the light source is from a given Point. More... | |
| Direction | getLightDirection (const Point &point) const |
| Direction from light source to a point. More... | |
Private Attributes | |
| Point | location_ |
| Location of this PointLightSource. More... | |
Additional Inherited Members | |
 Protected Member Functions inherited from LightSource | |
| LightSource (const Colour &colour) | |
| LightSource constructor. More... | |
| LightSource (const LightSource &lightSource) | |
| LightSource copy constructor. More... | |
| virtual | ~LightSource () |
| LightSource destructor. More... | |
| LightSource & | operator= (const LightSource &lightSource) |
| LightSource assignment operator. More... | |
| Protected Attributes inherited from LightSource | |
| Colour | colour_ |
| The Colour of this LightSource's illumination. More... | |
Detailed Description
Light emitted from a Point.
A PointLightSource represents light emitted from a point in the Scene. The amount of light that reaches any given part of the scene follows a \(1/r^2\) law, so more distant Objects receive less illumination.
Constructor & Destructor Documentation
◆ PointLightSource() [1/2]
PointLightSource constructor.
This creates a LightSource with a specified Colour at a given Location.
- Parameters
-
colour The Colour of the PointLightSource location The location of the PointLightSource
◆ PointLightSource() [2/2]
| PointLightSource::PointLightSource | ( | const PointLightSource & | lightSource | ) |
PointLightSource copy constructor.
- Parameters
-
lightSource The PointLightSource to copy to this.
◆ ~PointLightSource()
| PointLightSource::~PointLightSource | ( | ) |
PointLightSource destructor.
Member Function Documentation
◆ getDistanceToLight()
|
virtual |
Determine how far away the light source is from a given Point.
- Returns
- The distance between this light source and the point.
- See also
- getDirectionToLight()
Implements LightSource.
◆ getIlluminationAt()
Determine how much light reaches a Point from this PointLightSource.
The colour property determines the basic amount of light emitted by a PointLightSource. This is the illumination received at distance 1 from the PointLightSource, but it will appear brighter or darker if the illuminated Point is closer or further away. The amount of light received by a Point is scaled by \(1/d^2\), where \(d\) is the distance between the Point and the PointLightSource.
- Parameters
-
point The Point at which light is measured.
- Returns
- The illumination that reaches the Point.
Implements LightSource.
◆ getLightDirection()
Direction from light source to a point.
Return a Direction pointing from the given point towards the light source.
- Parameters
-
point The point where the ray is being computed.
- Returns
- The Direction from the point towards the light.
- See also
- getDistanceToLight()
Implements LightSource.
◆ operator=()
| PointLightSource & PointLightSource::operator= | ( | const PointLightSource & | lightSource | ) |
PointLightSource assignment operator.
- Parameters
-
lightSource The PointLightSource to copy to this.
- Returns
- A reference to
thisto allow for chaining of assignment.
Member Data Documentation
◆ location_
|
private |
Location of this PointLightSource.
The documentation for this class was generated from the following files:
