Drawing Planar Graphs with Prescribed Face Areas
نویسنده
چکیده
This thesis deals with planar drawings of planar graphs such that each interior face has a prescribed area. Our work is divided into two main sections. The first one deals with straight-line drawings and the second one with orthogonal drawings. For straight-line drawings, it was known that such drawings exist for all planar graphs with maximum degree 3. We show here that such drawings exist for all planar partial 3-trees, i.e., subgraphs of a triangulated planar graph obtained by repeatedly inserting a vertex in one triangle and connecting it to all vertices of the triangle. Moreover, vertices have rational coordinates if the face areas are rational, and we can bound the resolution. For orthogonal drawings, we give an algorithm to draw triconnected planar graphs with maximum degree 3. This algorithm produces a drawing with at most 8 bends per face and 4 bends per edge, which improves the previous known result of 34 bends per face. Both vertices and bends have rational coordinates if the face areas are rational.
منابع مشابه
Octagonal Drawings of Plane Graphs with Prescribed Face Areas
a r t i c l e i n f o a b s t r a c t An orthogonal drawing of a plane graph is called an octagonal drawing if each inner face is drawn as a rectilinear polygon of at most eight (polygonal) vertices and the contour of the outer face is drawn as a rectangle. A slicing graph is obtained from a rectangle by repeatedly slicing it vertically and horizontally. A slicing graph is called a good slicing...
متن کاملDrawing Graphs in the Plane with a Prescribed Outer Face and Polynomial Area
We study the classic graph drawing problem of drawing a planar graph using straight-line edges with a prescribed convex polygon as the outer face. Unlike previous algorithms for this problem, which may produce drawings with exponential area, our method produces drawings with polynomial area. In addition, we allow for collinear points on the boundary, provided such vertices do not create overlap...
متن کاملDrawing Planar Graphs with a Prescribed Inner Face
Given a plane graph G (i.e., a planar graph with a fixed planar embedding) and a simple cycle C in G whose vertices are mapped to a convex polygon, we consider the question whether this drawing can be extended to a planar straight-line drawing of G. We characterize when this is possible in terms of simple necessary conditions, which we prove to be sufficient. This also leads to a linear-time te...
متن کاملComplexity of Finding Non-Planar Rectilinear Drawings of Graphs
Monotone Drawings of Graphs p. 13 Upward Geometric Graph Embeddings into Point Sets p. 25 On a Tree and a Path with No Geometric Simultaneous Embedding p. 38 Difference Map Readability for Dynamic Graphs p. 50 Maximizing the Total Resolution of Graphs p. 62 Plane Drawings of Queue and Deque Graphs p. 68 An Experimental Evaluation of Multilevel Layout Methods p. 80 Orthogonal Graph Drawing with ...
متن کاملInner Rectangular Drawings of Plane Graphs
A drawing of a plane graph is called an inner rectangular drawing if every edge is drawn as a horizontal or vertical line segment so that every inner face is a rectangle. In this paper we show that a plane graph G has an inner rectangular drawing D if and only if a new bipartite graph constructed from G has a perfect matching. We also show that D can be found in time O(n/ logn) if G has n verti...
متن کامل