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Practical UML™: A Hands-On Introduction for Developers

Practical UML™: A Hands-On Introduction for Developers
The heart of object-oriented problem solving is the construction of a model. The model abstracts the essential details of the underlying problem from its usually complicated real world. Several modeling tools are wrapped under the heading of the UML™, which stands for Unified Modeling Language™. The purpose of this course is to present important highlights of the UML. At the center of the UML are its nine kinds of modeling diagrams, which we describe here. Some of the sections of this course contain links to pages with more detailed information. Why is UML important? Let's look at this question from the point of view of the construction trade. Writing software is not unlike constructing a building. The UML is applicable to object-oriented problem solving. Models consist of objects that interact by sending each other messages. Classes are the "blueprints" for objects. Use case diagrams Use case diagrams describe what a system does from the standpoint of an external observer. Class diagrams Related:  UML

Software design This article is about the activity between requirements and programming. For the broader meaning, see software development. Software design usually involves problem solving and planning a software solution. Overview[edit] Software design can be considered as creating a solution to a problem in hand with available capabilities. When designing software, two important factors to consider are its security and usability. Software Design[edit] Design Principles[edit] Software design is both a process and a model. The design process should not suffer from “tunnel vision.” Design Concepts[edit] The design concepts provide the software designer with a foundation from which more sophisticated methods can be applied. Design considerations[edit] There are many aspects to consider in the design of a piece of software. Compatibility - The software is able to operate with other products that are designed for interoperability with another product. Modeling language[edit] Design patterns[edit] Usage[edit]

UML 2 Class Diagrams: An Agile Introduction UML 2 class diagrams are the mainstay of object-oriented analysis and design. UML 2 class diagrams show the classes of the system, their interrelationships (including inheritance, aggregation, and association), and the operations and attributes of the classes. Class diagrams are used for a wide variety of purposes, including both conceptual/domain modeling and detailed design modeling. Although I prefer to create class diagrams on whiteboards because simple tools are more inclusive most of the diagrams that I'll show in this article are drawn using a software-based drawing tool so you may see the exact notation. In this article I discuss: 1. Figure 1 depicts a start at a simple UML class diagram for the conceptual model for a university. Figure 1. Enrollment is an associative class, also called a link class, which is used to model associations that have methods and attributes. Figure 2 depicts a reworked version of Figure 1, the associative class has been resolved. Figure 2. 2. 3. Source

Game programming This article is about the specifics of the programming aspect of video game development, for a broader overview see video game development. Development process[edit] Prototyping[edit] Programmers are often required to produce prototypes of gameplay ideas and features. A great deal of prototyping may take place during pre-production, before the design document is complete, and may help determine what features the design specifies. Prototypes are developed quickly with very little time for up-front design and mostly act as a proof of concept or to test ideas. Game design[edit] Main article: Game design Though the programmer's main job is not to develop the game design, the programmers often contribute to the design, as do game artists. Programmers often closely follow the game design document. Production[edit] During production, programmers may create a great deal of source code to create the game described in the game's design document. Testing[edit] Main article: Game testing Maintenance[edit]

The UML Class Diagram: Part 1 In the previous article, you saw what UML use cases are, and how to identify and create use cases. Now, you will learn about UML class diagrams, what the elements of a class diagram are, what each of these elements signify, and how to identify them. In our next article, a sequel to this one, we will see how to create class diagrams for our case study—Courseware Management System. By the end of the second article, you will be able to define classes for a system and read and create class diagrams. Basics of UML Class Diagrams What is a UML class diagram? Identify the main members of the familyIdentify how they are related to each otherFind the characteristics of each family memberDetermine relations among family membersDecide the inheritance of personal traits and characters A UML class diagram is similar to a family tree. Similarly, a software application is comprised of classes and a diagram depicting the relationship between each of these classes would be the class diagram. Page 1 of 2

Physics engine A physics engine is computer software that provides an approximate simulation of certain physical systems, such as rigid body dynamics (including collision detection), soft body dynamics, and fluid dynamics, of use in the domains of computer graphics, video games and film. Their main uses are in video games (typically as middleware), in which case the simulations are in real-time. The term is sometimes used more generally to describe any software system for simulating physical phenomena, such as high-performance scientific simulation. Description[edit] There are generally two classes of physics engines: real-time and high-precision. Scientific engines[edit] One of the first general purpose computers, ENIAC, was used as a very simple type of physics engine. Physics engines have been commonly used on supercomputers since the 1980s to perform computational fluid dynamics modeling, where particles are assigned force vectors that are combined to show circulation. Game engines[edit]

Class Diagram Relationships in UML with ExamplesCreately Blog | Diagramming Articles and Tips on How to Draw Diagrams Many people consider class diagrams a bit more complicated to build compared with ER diagrams. While this might be true, this article helps clip some of the complexities of class diagrams in such a way that even non-programmers and less tech-savvy individuals will come to appreciate the usefulness of this modeling approach. In particular, this article explains how to correctly determine and implement the different class diagram relationships that are applicable in object-oriented modeling. Relationships in UML class diagrams Class Diagrams Explained Class diagrams are visual representations of the static structure and composition of a particular system using the conventions set by the Unified Modeling Language (UML). The following figure is an example of a simple class diagram: Simple class diagram with attributes and operations In the example, a class called “loan account” is depicted. Relationships in Class Diagrams Classes are interrelated to each other in specific ways. Association 1.

Video game development Video game development is the process of creating a video game. Development is undertaken by a game developer, which may range from a single person to a large business. Traditional commercial PC and console games are normally funded by a publisher and take several years to develop. Indie games can take less time and can be produced cheaply by individuals and small developers. The indie game industry has seen a rise in recent years with the growth of new online distribution systems and the mobile game market. The first video games were developed in the 1960s, but required mainframe computers and were not available to the general public. Mainstream PC and console games are generally developed in phases. Mobile games are, in general, much quicker to develop than the mainstream PC and console games. Overview[edit] Game development is the software development process by which a video game is produced. All but the smallest developer companies work on several titles at once. History[edit]

UML - Building Blocks As UML describes the real time systems it is very important to make a conceptual model and then proceed gradually. Conceptual model of UML can be mastered by learning the following three major elements: UML building blocksRules to connect the building blocksCommon mechanisms of UML This chapter describes all the UML building blocks. ThingsRelationshipsDiagrams (1) Things: Things are the most important building blocks of UML. StructuralBehavioralGroupingAnnotational Structural things: The Structural things define the static part of the model. Class: Class represents set of objects having similar responsibilities. Interface: Interface defines a set of operations which specify the responsibility of a class. Collaboration: Collaboration defines interaction between elements. Use case: Use case represents a set of actions performed by a system for a specific goal. Component: Component describes physical part of a system. Node: A node can be defined as a physical element that exists at run time. Interaction:

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