建構一個包含行為的客製化產品VR模型之研究

Construction of behavior-included VR model for custom products

簡利紋(Li-Wen Chien)

指導教授 ： 孫天龍

元智大學/工程學院/工業工程與管理學系/碩士(2007年)

摘要

以虛擬實境技術發展的及時互動3D產品型錄，可以讓顧客從各個角度觀察產品，並互動觸發產品零件拆解與功能運轉原理等動作特性，要發展一個可以隨客製化選項變化而動態改變客製化產品行為的3D電子型錄，產品VR模型除了要動態改變場景圖外，還要能動態改變動作節點以及節點執行順序與邏輯關係，過去有關客製化產品VR模型建構的研究大多數只考慮場景圖資料的動態更新，只能支援幾何與外觀的改變，無法支援動作行為的動態更新，少數研究雖然有提起VR模型行為動作之更新，但都缺乏系統化的分析與討論。故本研究提出一個系統化的方法來分析建構客製化產品VR模型的場景圖樣板與動作迴路樣板；場景圖樣板是以GBOM為基礎來建構，客製化零組件選項之場景圖會各別儲存；動作迴路樣板是透過將一個起始動作迴路案例一般化而產生，動作迴路樣板的組成節點包含一般行為節點與詮釋節點兩種，詮釋節點用來代表某零件無法預先定義的動作，動作迴路樣板中需要放至詮釋節點之動作節點或動作迴路也會各別儲存，並且，每個詮釋節點會輸入動作節點選擇規則與路徑選擇規則；當產品配置資訊確定後，系統除了調出客製化零組件之場景圖合併到場景圖樣板，並透過動作迴路樣板上詮釋節點的節點選擇規則將動作節點放入詮釋節點內，透過路徑選擇規則選擇執行的路徑，完成特定的動作迴路，以產生包含行為的客製化產品VR模型。

關鍵字

虛擬實境 ； 客製化產品 ； VR模型 ； 動作行為 ； 電子型錄

並列摘要

Virtual reality-based interactive 3D visualization of the geometric and functional characteristics of a product facilitates better communication than traditional paper-based product catalog. Due to the many possible ways to configure a custom product, it is impossible to pre-build all the VR models for the possible variations of a custom product may have. To solve this problem, the template-based approach has been employed by previous researchers to develop dynamic catalog for custom product. A scene graph template is used to represent the generic VR model for a family of custom products. Specific VR model of a custom product is derived from template by inserting scene graphs of selected parts into the generic scene graph. As previous researches only consider scene graph, the VR models derived are behavior excluded. Part of the reason for this is because constructing behavior model is tedious and complicated. It requires definition of the behavior nodes, as well as the animation circuit that defines the execution sequence and logics of the behavior nodes. Behavior programming is even complicated for custom products as the parts are not fixed. This research proposes a systematized method to analyze and develop a scene graph template and an animation circuit template representation to support construction of behavior-included VR model for custom products. The scene graph template builds based on GBOM, the animation circuit template builds based on an instance of an animation circuit and generalize the starting animation circuit to a template. The animation circuit template is a mix of ordinary behavior nodes and meta nodes. The meta nodes describe parts that actions are unable to define. Each meta node has node selection rules and route selection rules. We employ the proposed method to build 3D, interactive product catalog for a hydro-pneumatic manufacturing company.

並列關鍵字

Virtual reality ； custom products ； behavior model ； e-catalog

參考文獻

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