Literature

• Aliasing, Drawing Lines and Circles:
  [FvDFH90, 3.2], [PK87, 3], hugo elias: line drawing, hugo elias: scan converting
• Anti-aliasing:
  [FvDFH90, 3.17]
• Clipping:
  [FvDFH90, 3.11], [PK87, 5], ucdavis: clipping