org.sunflow.core
Class Camera

java.lang.Object
  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