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- //-----------------------------------------------------------------------------
- // Name: BumpLens Direct3D Sample
- //
- // Copyright (c) 1998-2001 Microsoft Corporation. All rights reserved.
- //-----------------------------------------------------------------------------
-
-
- Description
- ===========
- The BumpLens sample demonstrates a lens effect that can be acheived using
- bumpmapping. Bumpmapping is a texture blending technique used to render the
- appearance of rough, bumpy surfaces, but can also be used for other effects
- as shown here.
-
- Note that not all cards support all features for all the various bumpmapping
- techniques (some hardware has no, or limited, bumpmapping support). For more
- information on bumpmapping, refer to the DirectX SDK documentation.
-
-
- Path
- ====
- Source: DXSDK\Samples\Multimedia\D3D\BumpMapping\BumpLens
- Executable: DXSDK\Samples\Multimedia\D3D\Bin
-
-
- User's Guide
- ============
- The following keys are implemented. The dropdown menus can be used for the
- same controls.
- <Enter> Starts and stops the scene
- <Space> Advances the scene by a small increment
- <F1> Shows help or available commands.
- <F2> Prompts user to select a new rendering device or display mode
- <Alt+Enter> Toggles between fullscreen and windowed modes
- <Esc> Exits the app.
-
-
- Programming Notes
- =================
- Bumpmapping is an advanced multitexture blending technique that can be used
- to render the appearance of rough, bumpy surfaces. The bump map itself is a
- texture that stores the perturbation data. Bumpmapping requires two
- textures, actually. One is an environment map, which contains the lights
- that you see in the scene. The other is the actual bumpmapping, which
- contain values (stored as du and dv) used to "bump" the environment maps
- texture coordinates. Some bumpmaps also contain luminance values to control
- the "shininess" of a particular texel.
-
- This sample uses bumpmapping in a non-traditional fashion. Since bumpmapping
- really just perturbs an environment map, it can be used for other effects. In
- this case, perturbing a background image (which could be rendered on the fly)
- to make a lens effect.
-
- This sample makes use of common DirectX code (consisting of helper functions,
- etc.) that is shared with other samples on the DirectX SDK. All common
- headers and source code can be found in the following directory:
- DXSDK\Samples\Multimedia\Common
-