Beelddenken en ruimtelijk inzicht voor ontwerpers

De uitg. Tekst en opgaven is samengesteld ter gelegenheid van de cursus Beelddenken en Ruimtelijk Inzicht gegeven in mei 1993 op uitnodiging van het Studium Generale van de Technische Universiteit Eindhove

Beelddenken en ruimtelijk inzicht voor ontwerpers

De uitg. Tekst en opgaven is samengesteld ter gelegenheid van de cursus Beelddenken en Ruimtelijk Inzicht gegeven in mei 1993 op uitnodiging van het Studium Generale van de Technische Universiteit Eindhove

Read-It: A Multi-modal Tangible Interface for Children Who Learn to Read

Multi-modal tabletop applications offer excellent opportunities for enriching the education of young children. Read-It is an example of an interactive game with a multi-modal tangible interface that was designed to combine the advantages of current physical games and computer exercises. It is a novel approach for supporting children who learn to read. The first experimental evaluation has demonstrated that the Read-It approach is indeed promising and meets a priori expectations

The importance of the number of degrees of freedom for rotation of objects

In an experiment input methods for object rotation with differing degrees of freedom were assessed. The results are relevant for human- computer interfacing, not only for the finger tip controlled interface proposed in this paper but also for evaluation of existing approaches to rotation. When designing an interface with finger tip controlled rotation of virtual objects, for technical reasons the number of finger tips to be registered should be minimized. Performance of subjects who rotated real objects with different numbers of finger tips was assessed. Subjects rotated a transparent sphere encasing an object according to their personal preference, with three, two or one finger, and restricted to three orthogonal axes. The latter reflects rotation in much current 3D software, whereby only one rotational degree of freedom (DOF) is accessible at a time. Performance in the three and two finger conditions did not differ significantly from the free condition, whilst performance with one finger and orthogonally restricted was significantly lower. However, only the three finger condition was rated as comfortable as the free condition, whilst the two finger, one finger and orthogonally restricted conditions were rated as less comfortable. It is argued that the number of DOFS which can be accessed simultaneously is an important design consideration when quick and intuitive rotation is to be achieved

Cubby: a multiscreen movement parallax display for direct manual manipulation

This paper presents a desktop virtual reality system featuring head-coupled movement parallax on three orthogonal screens. Virtual objects are displayed in front of the screens and are thus accessible to the user's hand. As the three-dimensional impression is based on movement parallax rather than stereo, very little headware is required. Although currently limited to visualization, the system allows the possibility to implement direct instrumental manipulation rather than manipulation through conventional pointing devices such as a mouse or a trackball. The benefits of a united display and manipulation space are discussed. A technical description of the set-up is given