A high level of programming knowledge is needed in order to script a video game. This prevents video game design from being accessible to non-programmers. ScriptEase is a tool that was designed to solve this problem. While ScriptEase has been shown to be accessible to 10th grade English students there remains areas for further simplication. This thesis focuses on changing the way authors set options within ScriptEase by introducing a new technique called Describers. Describers allow authors to adapt plain English sentences to provide a description of each option. A user study was conducted that compared Describers against the original technique of using denitions. The participants were able to complete signicantly more statements and showed a preference for the Describer. Simplications such as the Describers will lower the entrance bar for an author. The underlying structure of the Describer can be used to simplify creating conditional statements.

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Orientador: Wu Shin-Ting / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-09T22:16:05Z (GMT). No. of bitstreams: 1 Batagelo_HarlenCosta_D.pdf: 45803621 bytes, checksum: 84f60003e85a2363b798560089526880 (MD5) Previous issue date: 2007 / Resumo: Tendo como hipótese de que o controle preciso do movimento de um cursor constitui uma das técnicas elementares para as tarefas de manipulação direta 3D, esta tese propõe uma arquitetura de suporte a controles configuráveis dos movimentos de cursores em relação a modelos deformados em hardware gráfico. De forma integrada ao fluxo programável de visualização, a arquitetura calcula atributos de geometria diferencial discreta dos modelos processados, codificando tais atributos em pixels de buffers de renderização não visíveis. Mostramos, através de estudos de casos, que o uso desses atributos é suficiente para estabelecer uma correspondência entre o espaço discreto do modelo renderizado na tela e o espaço contínuo do modelo submetido ao fluxo de visualização. Isto permite que os cursores sejam posicionados de forma consistente com aquilo que o usuário está visualizando, proporcionando uma interação mais acurada. Testes de desempenho e robustez são conduzidos para validar a arquitetura. Uma biblioteca de funções que encapsula a arquitetura é apresentada, juntamente com exemplos de tarefas de manipulação direta 3D implementadas através dela / Abstract: Based on the hypothesis that the precise control of the motion of a cursor constitutes one of the elementary techniques for 3D direct manipulation tools, this thesis proposes an architecture for supporting a configurable control of the motion of cursors with respect to models deformed on graphics hardware. Integrated with the actual programmable rendering pipeline, the architecture computes discrete differential geometric attributes of the processed models and encodes such attributes in pixels of off-screen render buffers. We show, through case studies, that these attributes are sufficient to establish a correspondence between the discrete space of the model rendered on the screen and the continuous space of the model submitted to the rendering pipeline. As a result, the cursors can be positioned consistently with what the user is actually viewing, thus providing a more accurate interaction. Efficiency and reliability tests are conducted to validate the architecture. A library of functions that encapsulates the architecture and examples of 3D direct manipulation tasks implemented with it are also presented. / Doutorado / Engenharia de Computação / Doutor em Engenharia Elétrica