org.sunflow.core
Class Camera

java.lang.Object
  extended by org.sunflow.core.Camera
All Implemented Interfaces:
RenderObject

public class Camera
extends java.lang.Object
implements RenderObject

This class represents a camera to the renderer. It handles the mapping of camera space to world space, as well as the mounting of CameraLens objects which compute the actual projection.


Constructor Summary
Camera(CameraLens lens)
           
 
Method Summary
 Ray getRay(float x, float y, int imageWidth, int imageHeight, double lensX, double lensY, float time)
          Generate a ray passing though the specified point on the image plane.
 float getTime(float time)
          Computes actual time from a time sample in the interval [0,1).
 boolean update(ParameterList pl, SunflowAPI api)
          Update this object given a list of parameters.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

Camera

public Camera(CameraLens lens)
Method Detail

update

public boolean update(ParameterList pl,
                      SunflowAPI api)
Description copied from interface: RenderObject
Update this object given a list of parameters. This method is guarenteed to be called at least once on every object, but it should correctly handle empty parameter lists. This means that the object should be in a valid state from the time it is constructed. This method should also return true or false depending on whether the update was succesfull or not.

Specified by:
update in interface RenderObject
Parameters:
pl - list of parameters to read from
api - reference to the current scene
Returns:
true if the update is succesfull, false otherwise

getTime

public float getTime(float time)
Computes actual time from a time sample in the interval [0,1). This random number is mapped somewhere between the shutterOpen and shutterClose times.

Parameters:
time -
Returns:

getRay

public Ray getRay(float x,
                  float y,
                  int imageWidth,
                  int imageHeight,
                  double lensX,
                  double lensY,
                  float time)
Generate a ray passing though the specified point on the image plane. Additional random variables are provided for the lens to optionally compute depth-of-field or motion blur effects. Note that the camera may return null for invalid arguments or for pixels which don't project to anything.

Parameters:
x - x pixel coordinate
y - y pixel coordinate
imageWidth - width of the image in pixels
imageHeight - height of the image in pixels
lensX - a random variable in [0,1) to be used for DOF sampling
lensY - a random variable in [0,1) to be used for DOF sampling
time - a random variable in [0,1) to be used for motion blur sampling
Returns:
a ray passing through the specified pixel, or null