---
title: "Experiments with a Network-Based Geometric Reasoning Engine"
authors:
  - "Robert B. Fisher"
  - "Mark J. L. Orr"
doi: ""
url: "https://ijcai.org/proceedings/1989/258"
pdf: "https://ijcai.org/proceedings/1989/0258.pdf"
venue: "Proceedings of the Eleventh International Joint Conference on Artificial Intelligence"
year: 1989
pages: "1623-1627"
track: "Vision and Robotics"
keywords:
---

# Experiments with a Network-Based Geometric Reasoning Engine

Robert B. Fisher, Mark J. L. Orr

*Proceedings of the Eleventh International Joint Conference on Artificial Intelligence*, pages 1623-1627.

## Abstract

Fisher and Orr (1988) described a geometric reasoning engine based on a value passing constraint network. This paper reports on more recent results from this research: several experiments on detecting inconsistency between constraints, how to bind degrees of freedom in a revolute joint, some results on propagation of error in the networks, and performance on a large three dimensional reasoning problem involving three revolute joints.