Precedence Graphs

• Additional geometric information

  • Undirected edges represent positive objects belonging to same object
    • Connected components define sub-objects

• Derivation

  • Assume quadratic patches
    • ax2+by2+cz2+dxy+eyz+fzx+gx+hy+iz = 1
  • Translate and rotate coordinates
    • a’x’2+b’y’2+c’z’2+g’= 1

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