Dynamic Detection of Topological Information from Grid-Based Generalized Voronoi Diagrams

Algorithm 4

Pseudocode for detecting potential GVD vertices.

CheckPotentialVertex()

(65) for each 𝑠∈roughtEQueue

(66)   Vertex v, 𝑝𝑜𝑠_𝑣←𝑝𝑜𝑠_𝑠

(67)   Insert(𝑠𝐼𝐷𝑠_𝑣, 𝑠𝐼𝐷𝑝_𝑠)

(68)   Insert(𝑒𝐼𝐷𝑠_𝑣, BuildEdgeID(𝑠𝐼𝐷𝑝_𝑠))

(69)   count ← 1

(70)   for each n ∈ AdjECell(s)

(71)     if 𝑠𝐼𝐷𝑝_𝑠≠𝑠𝐼𝐷𝑝_𝑛

(72)       Insert(𝑠𝐼𝐷𝑠_𝑣, 𝑠𝐼𝐷𝑝_𝑛)

(73)       Insert(𝑒𝐼𝐷𝑠_𝑣, BuildEdgeID(𝑠𝐼𝐷𝑝_𝑛))

(74)       count ←count + 1

(75)     if count > 2

(76)       Insert(v, vertexPQueue, count)

(77)  else delete v