Introduction to Direct X Implementation Installing Direct X

Introduction to Direct. X Implementation

Installing Direct. X SDK l To write and execute Direct. X 9. 0 programs, you need both : l Direct. X 9. 0 runtime and the l Direct. X 9. 0 SDK (Software Development Kit) l Note that the runtime will be installed when you install the SDK. The Direct. X SDK can be obtained at http: //msdn. microsoft. com l The installation is straightforward; however, there is one important point, make sure that you select the debug option.

Installing Direct. X SDK The debug option installs both the debug and retail builds of the Direct. X DLLs onto your computer, whereas the retail option installs just the retail DLLs. For development, you want the debug DLLs, since these DLLs will output Direct 3 Drelated debug information into the Visual Studio output window when the program is run in debug mode, which is obviously very useful when debugging Direct. X applications.

Installing SDK Updates

Setting Up the Development Environment Include Search Paths Tools-> Options-> Directories tab. In VC ++ 6. 0 and 7. 0 you will also want to specify the directory paths at which the Direct. X header files and library files are located, so VC ++ can find these files. The Direct. X header files and library files are located at the paths D: DXSDKInclude and D: DXSDKLib, respectively. Note The location of the Direct. X directory DXSDK on your computer may differ; it depends on the location that you specified during installation.

Preparing for Compilation Linker Search Paths In order to build the sample programs, you will need to link the library files d 3 d 9. lib, d 3 dx 9. lib, and winmm. lib into your project. Note that winmm. lib isn't a Direct. X library file; it is the Windows multimedia library file, and we use for its timer functions

Why use C++? Language: Delphi, VB , C# , C++ , Java , C Aspects : 1. Unmanaged against managed 2. VB is Interpreter 3. Java – Virtual machine 4. Com supporting (C++ supports COM better than C does )

App. Wizard creates a small C++ template application that can integrate the common Direct. X components: ØDirect 3 D, ØDirect. Input, ØDirect. Music, ØDirect. Sound, ØDirect. Play. It provides basic functionality that is easy to build on and demonstrates the use of each component.

App. Wizard

App. Wizard

Let’s Try it !

The Basic Interface All Direct 3 D interfaces depends on object Direct 3 DRM (Retained Mode — Direct 3 D Retained Mode is a high-level 3 -D scene graph manager that simplifies the building and animation of 3 D worlds and data ). LPDIRECT 3 DRM d 3 drm; // pointer to Direct 3 DRM Obj Direct 3 DRMCreate(&d 3 drm); // create & init obj The main goal of Direct 3 DRM is to Create other objects

Direct 3 D RM & Other Objects Direct 3 DRMDevice device ; // Represents the visual display destination for the renderer // to get use Create. Device. From. Clipper() Create. Device. From. Surface() LPDIRECT 3 DRMWINDEVICE windev; device->Query. Interface(IID_IDirect 3 DRMWin. Device, (void**)&windev); // then can use Handle. Paint() camera — это фрейм, определяющий местоположение и ориентацию порта просмотра

Direct 3 D RM & Other Objects Direct 3 DRMViewport Defines how the 3 -D scene is rendered into a 2 -D window. d 3 drm->Create. Viewport( device, camera, 0, 0, device->Get. Width(), device->Get. Height(), &viewport ); camera — это фрейм, определяющий местоположение и ориентацию порта просмотра

Direct 3 D RM & Other Objects Direct 3 DRMFrame object used by the viewport to define the viewing position and direction LPDIRECT 3 DRMFRAME newframe; d 3 drm->Create. Frame(parentframe, &newframe); camera — это фрейм, определяющий местоположение и ориентацию порта просмотра

Direct 3 D RM & Other Objects Direct 3 DRMMesh. Builder Defines how the 3 -D scene is rendered into a 2 -D window. LPDIRECT 3 DRMMESHBUILDER meshbuilder; d 3 drm->Create. Mesh. Builder(&meshbuilder); camera — это фрейм, определяющий местоположение и ориентацию порта просмотра

Device-Supported Primitive Types l Microsoft Direct 3 D devices can create and manipulate the following types of primitives:

Device-Supported Primitive Types A point list is a collection of vertices that are rendered as isolated points A line list is a list of isolated, straight line segments. The number of vertices in a line list must be an even number greater than or equal to two.

Device-Supported Primitive Types A line strip is a primitive that is composed of connected line segments A triangle list is a list of isolated triangles. A triangle list must have at least three vertices.

Device-Supported Primitive Types A triangle strip is a series of connected triangles A triangle fan is similar to a triangle strip, except that all the triangles share one vertex

Direct. X Dependences Tree

Objects Creation Flow

Direct. X by MFC

X Files l X files provide a template-driven format that enables the storage of meshes, textures, animations, and user-definable objects. Support for animation sets enables you to store predefined paths for playback in real time. l X files should be created by CONV 3 DS utility, or by Direct 3 D API (Direct 3 DRMMeshbuilder ) interface.

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