【作者】 申世恒； 李柏岩； 刘晓强； 王府梅； 宋晖；

【Author】 SHEN Shi-heng1 LI Bai-yan1 LIU Xiao-qiang1 WANG Fu-mei2 SONG Hui2 1.College of Computer Science and Technology,Shanghai 201620 2.College of Textiles,Donghua University,Shanghai 201620

【机构】 东华大学计算机科学与技术学院； 东华大学纺织学院；

【摘要】 为增强三维场景中物体的真实感,展现物体局部细节特征,提出了一种基于区域增长和三角分割的局部纹理贴图映射算法。该算法以用户指定点为中心点,将包含该点三角面作中介面,通过将邻接平面展平到中介平面上,在一定范围内扩展该映射区域,计算区域内顶点纹理坐标。对于部分超过范围的三角面,通过求切线交点的方法进行三角分割,直至获得贴图的合适映射区域。算法成功应用于针织物外观模拟展示系统,很好地实现在不规则三维物体上的局部区域纹理映射。更多还原

【Abstract】 In order to enhance the reality and details of objects in 3D virtual scenes,an algorithm for regional texture mapping based on region growing is proposed.In the algorithms,an intermediary surface which contains a user specified central point is located,and all its adjacent triangular faces are projected onto it.Around the central point,all triangular faces and their neighbors within a specified bound are added to the region one by one.The triangular faces which across specified bound will be divided into smaller ones by triangulation.The procedure will be continued until a proper region for texture mapping is obtained.The algorithm has been successfully used in a weft-knitted fabric simulation system.It is quite effective in regional texture mapping especially for irregular 3D objects.更多还原