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Based on two-dimensional and three-dimensional contour sampling point per ball modeling technology

Author: SunLei
Tutor: JinXiaoGang
School: Zhejiang University
Course: Computer Applications
Keywords: Dollar Ball Oval Axis Three-dimensional modeling Two-dimensional contour Three sampling points Implicit Surfaces
CLC: TP391.41
Type: Master's thesis
Year: 2006
Downloads: 92
Quote: 0
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Abstract


This axis of the object geometry and metadata modeling technology combined with the ball , we propose a two-dimensional contour according to the object or three-dimensional sampling points for fast three-dimensional object modeling technology. Based on the traditional two-dimensional contour modeling technology , mostly using a far cry from the real world concept , which for the average user to understand and use there is a certain degree of difficulty. In this paper, based on the two-dimensional contour modeling technology and meta ball , clever use of the geometric properties of the central axis , making the entire modeling process becomes intuitive and easy to understand. Meanwhile, this method can reduce the conventional molding technology Metaballs parameter determines the difficulty to achieve rapid prototyping purposes. We first obtain an object through an interactive two-dimensional contour, and then extract the approximate two-dimensional shape of the central axis . On this basis , we can get the approximation algorithm designed contour of the original two-dimensional volume set ( circle , ellipse ) . The resulting two-dimensional original body finally set the third dimension of the information , and meta- ball system other shape parameters , and optimize the parameters , we can get the final three-dimensional objects . This paper presented based on the axis and the contour line data point obtaining effective and efficient ellipse circle Geometry detailed original algorithm, and compared. Were also compared and analyzed using a round , oval , super oval shape of the original body is the advantages and disadvantages . For the three sampling points based on modeling , we use the PowerCrust result that the set of three-dimensional sphere approximation of the sampling point . We will get as one yuan each sphere ball , and use Metaball model to generate three-dimensional approximation of a sample point implicit surface . In order to better approximate a given three-dimensional sampling points for each dollar we ball parameters were optimized . The proposed method can be used for rapid modeling three-dimensional objects , children's cartoon in shape modeling and animation effects .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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