Method Detail

• getRay

  Ray getRay(float x,
             float y,
             int imageWidth,
             int imageHeight,
             double lensX,
             double lensY,
             double time)

  Create a new rayto be cast through pixel (x,y) on the image plane. Two sampling parameters are provided for lens sampling. They are guarenteed to be in the interval [0,1). They can be used to perturb the position of the source of the ray on the lens of the camera for DOF effects. A third sampling parameter is provided for motion blur effects. Note that the Camera class already handles camera movement motion blur. Rays should be generated in camera space - that is, with the eye at the origin, looking down the -Z axis, with +Y pointing up.

  Parameters:

  x - x coordinate of the (sub)pixel

  y - y coordinate of the (sub)pixel

  imageWidth - image width in pixels

  imageHeight - image height in pixels

  lensX - x lens sampling parameter

  lensY - y lens sampling parameter

  time - time sampling parameter

  Returns:

  a new ray passing through the given pixel