Geometric Modeling using 2D template by Freehand Drawings
Weizhong Liu, Kunio Kondo, Jun Mitani · Journal of Graphic Science of Japan · 2005
We present a geometric modeling tool by freehand drawings. The idea is to use a 2D template topology library as an essential tool to reconstruct and modify the 3D shape step by step. The template topology library is called T -LIB which is consisted of 2D Edge Graphs and the corresponding algorithms to generate 3D objects. We analyze the local structure around the input strokes as a 2D Edge Graph. Once the Edge Graph can be matched to a template of T-LIB, the 3D object can be generated in basic shape reconstruction procedure, or modified in 3D shape modification procedure. After we get the polyhedral network, we use fillet operation and subdivision to get smooth shape.