Introduction%20to%20DirectX%20Implementation

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Introduction to DirectXImplementation
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Installing DirectX SDK

• To write and execute DirectX 9.0 programs, you
  need both
• DirectX 9.0 runtime and the
• DirectX 9.0 SDK (Software Development Kit)
• Note that the runtime will be installed when you
  install the SDK. The DirectX SDK can be obtained
  at http//msdn.microsoft.com
• The installation is straightforward however,
  there is one important point, make sure that you
  select the debug option.

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Installing DirectX SDK

• The debug option installs both the debug and
  retail builds of the DirectX 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
  Direct3D-related debug information into the
  Visual Studio output window when the program is
  run in debug mode, which is obviously very useful
  when debugging DirectX applications.

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Installing SDK Updates
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Setting Up the Development Environment
Include Search Paths Tools-gt Options-gt
Directories tab.

• In VC 6.0 and 7.0 you will also want to
  specify the directory paths at which the DirectX
  header files and library files are located, so VC
  can find these files. The DirectX header files
  and library files are located at the paths
  D\DXSDK\Include and D\DXSDK\Lib, respectively.
• Note The location of the DirectX directory DXSDK
  on your computer may differ it depends on the
  location that you specified during installation.

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Preparing for Compilation
Linker Search Paths

• In order to build the sample programs, you will
  need to link the library files d3d9.lib,
  d3dx9.lib, and winmm.lib into your project. Note
  that winmm.lib isn't a DirectX library file it
  is the Windows multimedia library file, and we
  use for its timer functions

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Why use C?

• Language
• Delphi, VB , C , C , Java , C
• Aspects
• Unmanaged against managed
• VB is Interpreter
• Java Virtual machine
• Com supporting (C supports COM better than C
  does )

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AppWizard

• AppWizard creates a small C template
  application that can integrate the common DirectX
  components
• Direct3D,
• DirectInput,
• DirectMusic,
• DirectSound,
• DirectPlay.
• It provides basic functionality that is easy
  to build on and
• demonstrates the use of each component.

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AppWizard
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AppWizard
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Lets Try it !
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The Basic Interface
All Direct3D interfaces depends on object
Direct3DRM (Retained Mode  Direct3D Retained
Mode is a high-level 3-D scene graph manager that
simplifies the building and animation of 3-D
worlds and data ).
LPDIRECT3DRM d3drm // pointer
to Direct3DRM Obj Direct3DRMCreate(d3drm) //
create init obj
The main goal of Direct3DRM is to Create other
objects
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Direct3D RM Other Objects
Direct3DRMDevice device // Represents the
visual display destination for the renderer
// to get use CreateDeviceFromClipper()
CreateDeviceFromSurface()
LPDIRECT3DRMWINDEVICE windev device-gtQueryInter
face(IID_IDirect3DRMWinDevice, (void)windev)
// then can use HandlePaint()
camera  ??? ?????, ???????????? ?????????????? ?
?????????? ????? ?????????
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Direct3D RM Other Objects
Direct3DRMViewport Defines how the 3-D scene is
rendered into a 2-D window.
d3drm-gtCreateViewport( device, camera, 0,
0, device-gtGetWidth(),
device-gtGetHeight(), viewport )
camera  ??? ?????, ???????????? ?????????????? ?
?????????? ????? ?????????
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Direct3D RM Other Objects
Direct3DRMFrame object used by the viewport to
define the viewing position and direction
LPDIRECT3DRMFRAME newframe d3drm-gtCreateFrame(p
arentframe, newframe)
camera  ??? ?????, ???????????? ?????????????? ?
?????????? ????? ?????????
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Direct3D RM Other Objects
Direct3DRMMeshBuilder Defines how the 3-D scene
is rendered into a 2-D window.
LPDIRECT3DRMMESHBUILDER meshbuilder
d3drm-gtCreateMeshBuilder(meshbuilder)
camera  ??? ?????, ???????????? ?????????????? ?
?????????? ????? ?????????
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Device-Supported Primitive Types

• Microsoft Direct3D devices can create and
  manipulate the following types of primitives

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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.
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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.
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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
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DirectX Dependences Tree
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Objects Creation Flow
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DirectX by MFC
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X Files

• 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.
• X files should be created by CONV3DS utility, or
  by Direct3D API (Direct3DRMMeshbuilder )
  interface.

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Thank You !