The trend of using modern technologies in the construction industry has been growing stronger recently, particularly fields additive or robotic bricklaying. Therefore, specifically for purpose bricklaying, we created a digital layout plan works. This article presents universal methodology creating bricklaying various variations wall building systems. method is based on conversion drawings from ...

Extending the current “2.5D” terrain model is a necessary development in GIS. Existing 2D surface information must be extended to 3D, while trying to preserve the topological integrity. Computer-Aided Design (CAD) on the other hand is often fully 3D, which may be excessive for our “extended 2D” mapping needs. We have used the “boundary representation” (brep) design from CAD systems, based on ma...

The intersection between 3D objects is ubiquitous in modeling. The objects are represented using the Boundary Representation (ANSI Brep) model in many applications such as CAD/CAM, collision detection, and spatial reasoning. Detection of possible intersection between objects can be based on the objects’ boundaries (approximate triangulations), computing triangle-triangle intersection. Usually t...

In most current feature modelling systems, blends are modelled as a kind of features too. These systems use a boundary representation (Brep) to describe the shape of a product. It is shown that the practice of basing specification of blends on conventional Breps is ineffective. A solution to this problem is introduced in which blends are described at a higher level. Blends are defined in a feat...

In CAD/CAM modeling, objects are represented using the Boundary Representation (ANSI Brep) model. Detection of possible intersection between objects can be based on the objects’ boundaries (i.e., triangulated surfaces), and computed using triangle-triangle intersection. Usually only a cross intersection algorithm is needed; however, it is beneficial to have a single robust and fast intersection...

This paper presents a new kind of composite produced with smalldiameter bamboo (Phyllostachys glauca McClure) and extruded tubular particleboard. The mechanical properties of the composite are significantly affected by the properties of the bamboo. First, the compression strength of the bamboo was studied. It was found that the compression strength (fc, MPa) and the maximum force of compression...

We present a new algorithm, called ACSGM (which is short for Adaptive CSG Mesher), that converts scenes in CSG representation into a boundary representation (BREP) based on at triangles. The algorithm is based on the marching cube algorithm, but instead of working at a xed resolution, the size of the cubes used in the meshing process is changed adaptively. Quite diierent from the marching cube ...

Extending the current “2.5D” terrain model is a necessary development in GIS. Existing 2D surface information must be extended to 3D, while trying to preserve the topological integrity. Computer-Aided Design (CAD) on the other hand is often fully 3D, which may be excessive for our “extended 2D” mapping needs. We have used the “boundary representation” (brep) design from CAD systems, based on ma...

Feature recognition has been a weak link in most implementations of integrated CAD/CAM systems for machining. A method called Backward Growing was recently suggested as a simple, but effective means to recognize machining features from the boundary representation (brep) of a designed part. The method promises, through its simplicity, to be applicable to many varieties of machined shapes. Howeve...

For users of CAD data, few things are as frustrating as receiving unusable, poor quality data. Users often waste time fixing or rebuilding such data from scratch on the basis of paper drawings. While previous studies use the boundary representation (BRep) of CAD models, we propose an approach to repairing CAD model errors that is based on the design history. CAD model errors can be corrected by...