Virtual City Ground Object Modeling and Visualization Based on OpenGL

2012 ◽  
Vol 263-266 ◽  
pp. 1910-1915 ◽  
Author(s):  
Xu Dong Xu ◽  
Jing Wang ◽  
Guan Feng Lv
Keyword(s):  
Coordinate Transformation ◽  
Modeling Method ◽  
Object Modeling ◽  
Geometry Modeling ◽  
Modeling Methods ◽  
Modeling Process ◽  
Ground Object ◽  
Street Lamp ◽  
Virtual City ◽  
Visualization Technology

A kind of modeling method of regular ground object in virtual city was proposed through splicing certain spatial simple geometries based on VC++ and OpenGL, which combining the ground objects’ characteristics with modeling realistic demand. This method firstly generated some basic shapes (cylinder, cone or sphere) which were the constituent parts of regular ground object, by using simplified 3D basic geometry modeling method of OpenGL. Then joined these basic shapes together by doing coordinate transformation to construct the regular ground object. The case of modeling street lamp was taken as an example to introduce the ground object’s modeling methods and visualization technology. The modeling process just need calculating a small number of coordinates, and the amount of data is also very low. Experimental results show that generated models looks very real.

Modeling Research of Hypoid Gear Based on Real Machining Process

2010 ◽  
Vol 20-23 ◽  
pp. 1429-1433
Author(s):  
Xiu Ting Wei ◽  
Jing Cheng Liu ◽  
Qiang Du
Keyword(s):  
Tooth Profile ◽  
Modeling Method ◽  
Machining Process ◽  
Transmission Ratio ◽  
Hypoid Gear ◽  
Hypoid Gears ◽  
Modeling Methods ◽  
Modeling Process ◽  
Generating Method

In this paper, two modeling methods, the forming method and the generating method, for hypoid gears with two kinds of transmission ratio are discussed by simulating the actual machining process. In the generating modeling method, the tooth profile of the gear is generated by boolean algorithm step by step after creating the models of the gear blank and the cutter and then rotating around their own axis by certain degrees until the cutter is outside the gear blank completely. In contrast with the generating modeling method, the tooth profile is formed by carrying out the boolean algorithm for one time after creating the models of the gear blank and cutter seperately in the forming modeling method. Then using feature instance, all the teeth are created both in the generating modeling method and in the forming modeling method. Using the two modeling methods given in this paper, the modeling process can be shortened and the modeling precision can be improved.

A Haptic-Based Approach for Cable Design and Routing in Industrial Complex Products

2010 ◽  
Vol 139-141 ◽  
pp. 1356-1360 ◽  
Author(s):  
Gang Sun ◽  
Ping Jun Xia ◽  
Yuan Li ◽  
Wang Min Yi ◽  
Lei Huang
Keyword(s):  
Force Feedback ◽  
Modeling Method ◽  
Physical Models ◽  
Industrial Complex ◽  
Complex Products ◽  
Cad System ◽  
Geometry Modeling ◽  
Product Models ◽  
Physics Modeling ◽  
Fitting In

Cable design and routing is a time-consuming and costly process for industrial complex products, traditionally it is finished by experienced engineers through soft lead or aluminum wire fitting in physical models, or by automatic or semi-automatic computing method in CAD system, but both with little success. In this paper, a new haptic-based interactive method is proposed. After rigid product models are loaded from CAD system, a geometry modeling method is used to represent cable shape, a physics modeling method for calculating cable deformation, and a haptic modeling method for interaction and force feedback. In this prototyping system, the user can define cable position and path, change its shape and size, and then simulate the design and routing process with haptic to feel the touch, collision and force feedback.

Investigation of automated geometry modeling process of woven fabrics based on the yarn structures

2014 ◽  
Vol 106 (9) ◽  
pp. 925-933 ◽  
Author(s):  
Zhenrong Zheng ◽  
Xiaoming Zhao ◽  
Chunhong Wang ◽  
Xiaojun Sun
Keyword(s):  
Woven Fabrics ◽  
Geometry Modeling ◽  
Modeling Process

A structured object modeling method SOMM and its environment SOME

1996 ◽  
Vol 27 (11) ◽  
pp. 1-18 ◽  
Author(s):  
Minoru Harada ◽  
Takafumi Sawada ◽  
Terutada Fujisawa
Keyword(s):  
Modeling Method ◽  
Object Modeling

The Object Modeling Process in a Nutshell

2004 ◽  
pp. 295-305
Author(s):  
Jacquie Barker ◽  
Grant Palmer
Keyword(s):  
Object Modeling ◽  
Modeling Process

ENHANCING THE SYSTEM DYNAMICS MODELING PROCESS WITH A DOMAIN MODELING METHOD

2013 ◽  
Vol 22 (02) ◽  
pp. 1350011 ◽  
Author(s):  
FIONA P. TULINAYO ◽  
PATRICK VAN BOMMEL ◽  
H. A. (ERIK) PROPER
Keyword(s):  
System Dynamics ◽  
Real Life ◽  
Modeling Method ◽  
Flow Diagram ◽  
Domain Modeling ◽  
Dynamics Modeling ◽  
Organizational Settings ◽  
National Medical ◽  
Modeling Process ◽  
Object Role Modeling

Defining complex system dynamics (SD) models in complex organizational settings is hard. This is so because the numbers of variables to consider are many and the question of causation is complicated to untangle. Second, SD models are ambiguous and hard to conceptualize. In this paper, we explore the use of a domain modeling method object-role modeling (ORM) in the process of developing SD models. We do so, because domain modeling methods help to identify relationships among entities within the scope of the problem domain and provide a structural view of the domain. The addition of a domain modeling method to the process of developing SD models is to improve SD model conceptualization, enable transformation and reuse of information plus underpin SD with a domain modeling method that allows creation of database. To realize this, we come up with a procedure in our overall research which we refer to as grounded system dynamics (GSD) a combination of ORM and SD. To reason about the combination of SD with a domain modeling method (ORM), we identify and evaluate relationships between their constructs. Basing on the identified relations, ORM to stock and flow diagram (SFD) steps are defined and applied to a real-life case study national medical stores (NMS) situated in Uganda. On completion, we draw conclusions.

An Automatic Modeling Method for Intersected Cross-Sections

2014 ◽  
Vol 1078 ◽  
pp. 294-299
Author(s):  
Song Hua Mei ◽  
Qing Zhao ◽  
Guo Liang Chen ◽  
Xian Lun Leng
Keyword(s):  
Cross Sections ◽  
Modeling Method ◽  
Unit Cell ◽  
Geological Model ◽  
Automatic Method ◽  
Automatic Modeling ◽  
Modeling Process ◽  
Unit Cells ◽  
Auxiliary Lines

According to the intersected cross-sections, an automatic method of constructing geological model was proposed. Firstly, in this method, these cross-sections are divided into some unit cells, and the auxiliary lines are increased and sheared by some geological rules in each unit cell. Finally the geological surfaces are created to form geological entities. This method can be applied in constructing geological entity model automatically, which contains the complex geological phenomena such as Pinch-out, changes and so on. This method also can avoid the modeling process of diverse manual way, raises the modeling speed.

Semiquantitative SDG Graphical Modeling for Complex System Fault Diagnosis

2012 ◽  
Vol 152-154 ◽  
pp. 1601-1606 ◽  
Author(s):  
Yan Su
Keyword(s):  
Complex System ◽  
Fault Diagnosis ◽  
Failure Analysis ◽  
Supply System ◽  
Data Driven ◽  
Graphical Modeling ◽  
Modeling Methods ◽  
Modeling Approach ◽  
Modeling Process ◽  
Air Supply

For the shortcomings of existing SDG modeling methods in fault diagnosis, a data-driven semi-quantitative SDG automatic graphical modeling approach and a direct manual SDG graphical modeling approach are investigated. Function failure analysis procedures and data modeling process based on system principle are introduced in detail, and relevant graphical modeling tool are developed. A fault diagnosis modeling for the air supply system of certain type of aircraft is taken as an illustration to verify the validity of proposed modeling method.

scholarly journals An algorithm for estimating surface normal from its boundary curves

2014 ◽  
Vol 2 (1) ◽  
pp. 67-72 ◽  
Author(s):  
Jisoon Park ◽  
Taewon Kim ◽  
Seung-Yeob Baek ◽  
Kunwoo Lee
Keyword(s):  
Surface Model ◽  
Geometric Information ◽  
User Intent ◽  
Geometry Modeling ◽  
Modeling Process ◽  
New Information ◽  
Normal Vectors ◽  
The One ◽  
Boundary Curves ◽  
Curve Networks

Abstract Recently, along with the improvements of geometry modeling methods using sketch-based interface, there have been a lot of developments in research about generating surface model from 3D curves. However, surfacing a 3D curve network remains an ambiguous problem due to the lack of geometric information. In this paper, we propose a new algorithm for estimating the normal vectors of the 3D curves which accord closely with user intent. Bending energy is defined by utilizing RMF(Rotation-Minimizing Frame) of 3D curve, and we estimated this minimal energy frame as the one that accords design intent. The proposed algorithm is demonstrated with surface model creation of various curve networks. The algorithm of estimating geometric information in 3D curves which is proposed in this paper can be utilized to extract new information in the sketch-based modeling process. Also, a new framework of 3D modeling can be expected through the fusion between curve network and surface creating algorithm.

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