Manuel Contero

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This paper presents a novel application of Augmented Reality for improving spatial abilities of engineering students. An augment book has been designed to provide 3D virtual models that help students to perform visualization tasks to promote the development of their spatial ability. A validation study with 24 freshmen on Mechanical Engineering at University(More)
We discuss the importance of visualization skills in engineering education and propose a dual approach to helping students improve their spatial abilities. The approach is based on computer graphics applications, and uses both Web-based graphics applications and a sketch-based modeling, system. By combining these approaches, we can capture students'(More)
This article considers how conceptual design of industrial products is supported by current CAD systems. The case of subsidiary industries, or first tier suppliers, that must simultaneously deal with different customers and CAD platforms, receive special attention. Conceptual design is critical, since the large variety of fundamental product data managed(More)
Optimization is one of the most promising geometrical reconstruction approaches. In this approach, the 2D vertices of the given figure maintain their plane coordinates (X,Y), while a set of Z coordinates (orthogonal to the plane) is computed to obtain a 3D configuration that matches the “implicit spatial information” contained in the departure drawing. In(More)
Although CAD systems have evolved considerably in functionality, expressiveness and modeling power over the last decades, their user interfaces are still tied to legacy principles and are not suited to the initial stages of product development. They exhibit steep learning curves, cumber-some and overly structured dialogues, including hundreds of commands.(More)
In this work, the background and evolution of three-dimensional reconstruction of line drawing over the last thirty years is discussed. A new general taxonomy is proposed to describe and discuss the historical evolution of geometrical reconstruction and its challenges. The evolution of geometrical reconstruction from recovering know-how stored in(More)
ParSketch is a software prototype to evaluate the usability and functionality of a sketching interface aimed at defining 2D parametric sections. Currently, ParSketch interprets strokes which can be recognized as geometry (line, arc, circle, ellipse, or composed entities that are automatically segmented into those basic entities), or graphic gestures(More)
This paper presents some learning support tools for developing spatial abilities in engineering design students. They are based on the previous authors' experience in teaching traditional Engineering Graphics and uses both on-line and batch computer-aided generation of 3D models from 2D freehand sketches. Although these applications can be used with(More)
Current user interfaces of CAD systems are still not suited to the initial stages of product development, where freehand drawings are used by engineers and designers to express their visual thinking. In order to exploit these sketching skills, we present a sketch based modeling system, which provides a reduced instruction set calligraphic interface to(More)