文件列表:

Common\include\asyncio.h (7731, 2001-10-08)
Common\include\asyncrdr.h (6836, 2001-10-08)
Common\include\d3dapp.h (9179, 2001-10-31)
Common\include\d3dfile.h (4344, 2001-10-31)
Common\include\d3dfont.h (2487, 2001-10-31)
Common\include\d3dres.h (1664, 2001-10-31)
Common\include\d3dsaver.h (13480, 2001-10-08)
Common\include\d3dutil.h (10718, 2001-10-31)
Common\include\ddutil.h (5085, 2001-10-31)
Common\include\didcfgview.h (27058, 2001-10-31)
Common\include\diutil.h (2061, 2001-10-31)
Common\include\dmutil.h (4390, 2001-10-31)
Common\include\dsutil.h (5911, 2001-10-31)
Common\include\dxutil.h (5147, 2001-10-31)
Common\include\netclient.h (4040, 2001-10-31)
Common\include\netclientres.h (376, 2001-10-08)
Common\include\netconnect.h (5678, 2001-10-31)
Common\include\netconnectres.h (802, 2001-10-08)
Common\include\netvoice.h (1948, 2001-10-31)
Common\src\d3dapp.cpp (75328, 2001-10-31)
Common\src\d3dfile.cpp (24189, 2001-10-31)
Common\src\d3dfont.cpp (23795, 2001-10-31)
Common\src\d3dsaver.cpp (124698, 2001-10-08)
Common\src\d3dutil.cpp (23266, 2001-10-31)
Common\src\ddutil.cpp (29936, 2001-10-31)
Common\src\didcfgview.cpp (116361, 2001-10-31)
Common\src\diutil.cpp (10877, 2001-10-31)
Common\src\dmutil.cpp (23148, 2001-10-31)
Common\src\dsutil.cpp (52773, 2001-10-31)
Common\src\dxutil.cpp (23668, 2001-10-31)
Common\src\netclient.cpp (46379, 2001-10-31)
Common\src\netconnect.cpp (62324, 2001-10-31)
Common\src\netvoice.cpp (14012, 2001-10-31)
Direct3D\Billboard\billboard.cpp (19912, 2001-10-31)
Direct3D\Billboard\billboard.dsp (5075, 2001-10-08)
Direct3D\Billboard\billboard.dsw (541, 2001-10-08)
Direct3D\Billboard\billboard.mak (6277, 2001-10-08)
Direct3D\Billboard\directx.ico (1078, 2001-10-08)
Direct3D\Billboard\resource.h (1333, 2001-10-08)
... ...

//----------------------------------------------------------------------------- // Name: Cull Direct3D Sample // // Copyright (c) 2000-2001 Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- Description =========== The Cull sample illustrates how to cull objects whose object bounding box (OBB) does not intersect the view frustum. By not passing these objects to D3D, you save the time that would be spent by D3D transforming and lighting these objects which will never be visible. The time savings could be significant if there are many such objects, and/or if the objects contain many vertices. More elaborate and efficient culling can be done by creating hierarchies of objects, with bounding boxes around groups of objects, so that not every object's OBB has to be compared to the view frustum. It is more efficient to do this OBB/frustum intersection calculation in your own code than to use D3D to transform the OBB and check the resulting clip flags. You can adapt the culling routines in this sample meet the needs of programs that you write. Path ==== Source: DXSDK\Samples\Multimedia\D3D\Cull Executable: DXSDK\Samples\Multimedia\D3D\Bin User's Guide ============ When you run this program, you'll see the same scene (a bunch of teapots) rendered into two viewports. The right viewport uses the view frustum that the code will cull against. The left viewport has an independent camera, and shows the right viewport's frustum as a visible object, so you can see where culling should be happening. 50 teapots are randomly placed in the scene, and they are rendered along with their semitransparent OBB's. The teapots are colored as follows to indicate their cull status: Dark Green: The object was quickly determined to be inside the frustum (CS_INSIDE) Light Green: The object was determined (after a fair bit of work) to be inside the frustum (CS_INSIDE_SLOW) Dark Red: The object was quickly determined to be outside the frustum (CS_OUTSIDE) Light Red: The object was determined (after a fair bit of work) to be outside the frustum (CS_OUTSIDE_SLOW) You should only ever see green teapots in the right window. Note that most teapots are either dark green or dark red, indicating that the slower tests are not needed for the majority of cases. To move the camera of the right viewport, click on the right side of the window, then use the camera keys listed below to move around. To move the camera of the left viewport, click on the left side of the window, then use the camera keys listed below to move around. You can also rotate the teapots to set up particular relationships against the view frustum. You cannot move the teapots, but you can get the same effect by moving the frustum instead. The following keys are implemented. The dropdown menus can be used for the same controls. Shows help or available commands. Prompts user to select a new rendering device or display mode Toggles between fullscreen and windowed modes Exits the app. Move the camera Rotate the camera Rotate the teapots Snap the left camera to match the right camera Snap the right camera to the original position Programming Notes ================= The OBB/viewport intersection algorithm used by this program is: 1) If any OBB corner pt is inside the frustum, return CS_INSIDE 2) Else if all OBB corner pts are outside a single frustum plane, return CS_OUTSIDE 3) Else if any frustum edge penetrates a face of the OBB, return CS_INSIDE_SLOW 4) Else if any OBB edge penetrates a face of the frustum, return CS_INSIDE_SLOW 5) Else if any point in the frustum is outside any plane of the OBB, return CS_OUTSIDE_SLOW 6) Else return CS_INSIDE_SLOW The distinction between INSIDE and INSIDE_SLOW, and between OUTSIDE and OUTSIDE_SLOW, is only provided here for educational purposes. In a shipping app, you probably would combine the cullstates into just INSIDE and OUTSIDE, since all you usually need to know is whether the OBB is inside or outside the frustum. The culling code shown here is written in a straightforward way for readability. It is not optimized for performance. Additional optimizations can be made, especially if the bounding box is a regular box (e.g., the front and back faces are parallel). Or this algorithm could be generalized to work for arbitrary convex bounding hulls to allow tighter fitting against the underlying models. 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

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