Ray Casting

Optical Effects | | Slicing

For each pixel on the image plane, ray casting performs the following steps:

  • Determine viewing ray through eye point and pixel on image plane
  • Sample the viewing ray
    • from back to front
    • with step length 1 voxel
  • Accumulate the optical effects for each step
    • Accumulated light intensity is decreased by absorption (exponentially with the sampled step length)
    • Accumulated light intensity is increased by emission (linearily with the sampled step length)

Optical Effects | | Slicing