Ray Tracing Algorithm for Shading and Shadows

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• Questions?
  • Exam question 4?
    • Can incorporate test for t > 0 into intersection test:
      

      t = -s(2)/d(2)
      pt = s + t * d
      if t > 0 & 0 ≤ pt(1) ≤ 1 & 0 ≤ pt(3) ≤ 1
          return 1
      else
          return 0

• Ray Tracer 3
  • Handout
  • Review and clarify design
  • Be sure difference between ray from viewing focal point to object and ray from intersection point to light is clear
    
• Next
  • Ray tracer 3 lab time

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