org.jpbrt.cameras
Class OrthographicCamera

java.lang.Object
  org.jpbrt.core.Camera
      org.jpbrt.core.ProjectiveCamera
          org.jpbrt.cameras.OrthographicCamera

public class OrthographicCamera
extends ProjectiveCamera

Alternative implementation of OrthoCamera, this time based on the first edition of the book.

Orthographic Camera takes a rectangular region of the scene and projects it onto the front face of the box that defines the region. It does not give the effect of foreshorting, but it does preserve parallel lines and relative distance between objects.

References:

• M. Pharr, G. Humphreys. (2004). Physically Based Rendering. Morgan Kaufmann.
  CHAPTER 06, Section 6.2.1, page 261.

Version:

1.0 2010-09-09 Created.

Author:

Werner Randelshofer

Field Summary

Fields inherited from class org.jpbrt.core.ProjectiveCamera

cameraToScreen, focalDistance, lensRadius, rasterToCamera, rasterToScreen, screenToRaster

Fields inherited from class org.jpbrt.core.Camera

cameraToWorld, film, shutterClose, shutterOpen

Constructor Summary

OrthographicCamera(AnimatedTransform cam2world, float[] screen, float hither, float yon, float sopen, float sclose, float lensr, float focald, Film film)

Method Summary

float

generateRay(CameraSample sample, Ray ray) page 264.

Methods inherited from class org.jpbrt.core.ProjectiveCamera

toString

Methods inherited from class org.jpbrt.core.Camera

generateRayDifferential, getFilm, setFilm

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

OrthographicCamera

public OrthographicCamera(AnimatedTransform cam2world,
                          float[] screen,
                          float hither,
                          float yon,
                          float sopen,
                          float sclose,
                          float lensr,
                          float focald,
                          Film film)

Parameters:

cam2world - Transforms world coordinates into camera coordinates.

screen -

hither - The near plane used for clipping.

yon - The far plane used for clipping.

sopen - The time when the shutter opens.

sclose - The time when the shutter closes.

lensr - The lens radius for simulation of depth of field. Specify 0 for infinite depth of field.

focald - The focal Distance for simulation of depth of field.

film - The film onto which the image is stored.

Method Detail

generateRay

public float generateRay(CameraSample sample,
                         Ray ray)

page 264.

Specified by:

generateRay in class Camera

Returns:

A weight for the effect that light arriving at the film plane along the generated ray will have on the final image. Most cameras always return a value of one, but cameras that simulate real physical lens systems might need to set this value based on the optics and the geometry of the virtual lens system.