基于边界约束的交互式图案拼接方法

Interactive Patterns Collage along a Given Boundary

数字制造的快速发展使得个人用户制造定制化模型成为可能,因此用户对于拥有良好交互界面的轻量化模型设计工具有迫切需求.提出一种可交互的、有边界约束的图案拼接设计方案的生成方法:用户输入一条封闭的边界曲线和若干个图案单元,首先自动生成一个受边界曲线形状约束的初始图案拼接方案,用户可以直接对每个图案单元进行交互编辑,交互过程中,基于弹簧质点系统对图案布局进行实时调整,以自动满足边界约束.交互结束后方法对最终结果进行局部连通性优化,以保证拼接结果可直接用于数字制造如3D打印、数字雕刻等.为了证明有效性,利用3D打印和数字纸雕展示了制造结果.

Recent years have witnessed rapid development of digital fabrication techniques,causing manufacturing individual models to be accessible to ordinary users.Thus designing tools for customized objects along a userfriendly way is getting highly demanded.Inspired by texture synthesis and image mosaics,this paper proposes a method that generates an editable patterns collage design along a given boundary:users inputting a close curve as the boundary and several pattern units;the method firstly generates an initial patterns collage design along the given curve boundary automatically;then users can directly edit each pattern unit;adjustment of patterns collage layout would take place on the basis of a spring mass system meanwhile maintaining the boundary constraint automatically.After the whole interaction step,our method optimizes the collage result for local connectivity in order to meet the fabrication constraints,so that we can manufacture this design by digital fabrications such as 3D printing and digital cutting.To demonstrate the effectiveness,we show the fabricated results via 3D printing and digital paper cutting.