Interactive point cloud blending by drag-and-drop

With the rapid development of 3D digital photography and 3D digital scanning devices, massive amount of point samples can be generated in acquisition of complex, real-world objects, and thus create an urgent need for advanced point-based processing and editing. In this paper, we present an interactive method for blending point-based geometries by dragging-and- dropping one point-based model onto another model’s surface metaphor. We first calculate a blending region based on the polygon of interest when the user drags-and-drops the model. Radial basis function is used to construct an implicit surface which smoothly interpolates with the transition regions. Continuing the drag-and-drop operation will make the system recalculate the blending regions and reconstruct the transition regions. The drag-and-drop operation can be compound in a constructive solid geometry (CSG) manner to interactively construct a complex point-based model from multiple simple ones. Experimental results showed that our method generates good quality transition regions between two raw point clouds and can effectively reduce the rate of overlapping during the blending.

Window 3.1中drag-and-drop实现过程及其程序设计

随着Microsoft Window 3.1系统在世界范围内的广泛流行,广大用户也随之对其所具有的各种操作日益熟悉,drag-and-drop(拖-拉-放)就是其中的突出代表之一,但一般程序员对实现其功能所需的数据结构及具体步骤尚未深入了解,本文将简要介绍如何用程序实现drag-and-drop操作。