Back Next

Going Through the Steps, Cont.`d

• We want it to point out along -z , i.e., to have the form
  
  

• for some p>0
  
  

• A first step is to make the x -coordinate zero, and the z -coordinate negative.

• Use our rotation scheme, rotating about y -axis.

• Set
  
  

• If rotated vector has z>0 , we may have to replace a with a = a + 180^

Mathematics of Projections - 09 MAY 95

Page 27 of 44

Generated with CERN WebMaker