Interactive Reconstruction of 3D Models in the OpenVSP Parametric Geometry Tool

摘要

Parametric geometry tools such as Vehicle Sketch Pad (OpenVSP) describe geometry by using the terms most familiar to designers, thereby facilitating design by reducing the problem's dimensionality and improving descriptive meaning. Often, design studies do not start from a clean sheet where the designer can construct an original native model in a parametric geometry tool. Instead, some pre-existing legacy 3D model plays the role of an initial design and/or a part of a design that is constrained in the design study. Additionally, some design optimization tools may operate on a discretized version of a model, leading to a desire to re-parameterize the optimization result. OpenVSP has been extended to support interactive assisted reconstruction of discrete 3D models. These legacy models may originate as structured or unstructured surface grids, 3D laser or CMM scans, or any other 3D point data source. The interactive assisted approach balances user guidance and algorithmic automation in a way that is superior to either a fully automated or fully manual approach. User guidance is essential to create a final parametric model constructed in a way that matches how a user would construct the same model - the right parameters are used in the right way. Algorithmic automation is essential to remove the tedium of finely adjusting parameters while assuring greatest possible accuracy.