CS 348B - Computer Graphics: Image Synthesis Techniques

Other images by varying the parameters in the pbrt file
  1. What physical quantity do we measure along a ray?
    The amount of light or radiance (PBRT page 27)
  2. What pbrt class is used to describe the reflection of light at a point?
    BSDF or Bidirectional Scattering Distribution Fuction (PBRT page 33)
  3. How are vectors and normals treated differently?
    During transformation of a surface, you need to maintain orthogonality between any new tangent vector t and its normal vector.  Vectors don’t have this requirement (PBRT page 78)
  4. What’s the different between ‘intersect’ and ‘intersectP’?
    Intersect returns information about the ray shape intersection
    IntersectP returns whether or not a ray shape intersection has occured
    (PBRT page 92)
  5. How is the information about intersection between a ray and a shape represented in pbrt?
    Differential Geometry based on uv coordinates (PBRT page 106)
  6. What kind of coordinates are used to parameterize a triangle?
    Barycentric coordinates (PBRT page 125)