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Boids.cpp
资源名称：DXGuide.zip　[点击查看]
上传用户：wymy58
上传日期：2007-01-07
资源大小：2086k
文件大小：19k
源码类别：

DirextX编程

开发平台：

Visual C++

Boids.cpp：源码内容
  1. // Boids.cpp : Defines the class behaviors for the application.
  3. #include "stdafx.h"
  4. #include "Boids.h"
  6. #ifdef _DEBUG
  7. #define new DEBUG_NEW
  8. #undef THIS_FILE
  9. static char THIS_FILE[] = __FILE__;
  10. #endif
  12. const bool g_bFullScreen
  13. #ifdef _DEBUG
  14. = false; // true;
  15. #else
  16. = true; // false;
  17. #endif // _DEBUG
  18. const bool g_bUseZBuffer = true; // false;
  19. const DWORD g_dwWidth = 640; // 800; // 1024;
  20. const DWORD g_dwHeight = 480; // 600; // 768;
  21. const DWORD g_dwBPP = 16; // 32;
  23. const bool g_bUseVoodoo12 = false; // true;
  24. const _GUID* const g_lpGuidD3DDevice
  25. = NULL;
  26. // = &IID_IDirect3DTnLHalDevice;
  27. // = &IID_IDirect3DRGBDevice;
  28. // = &IID_IDirect3DHALDevice;
  29. // = &IID_IDirect3DRefDevice;
  31. #define NUM_BOIDS 13
  32. #define NUM_OBSTACLES 8
  33. #define OBSTACLE_RADIUS 3.0f
  34. #define NUM_GRID 20
  35. #define GRID_WIDTH 190.0
  37. D3DVERTEX pvGridVertices[NUM_GRID * NUM_GRID];
  38. D3DVERTEX m_pvBoidVertices[16];
  39. WORD pwBoidIndices[30];
  41. CBoidsApp::CBoidsApp(void)
  42. {
  43. m_dwAppInitFlags &= ~CDirectXApp::DXAPPIF_DD;
  44. m_dwAppInitFlags |= CDirectXApp::DXAPPIF_D3DIM;
  46. SetFullScreen(g_bFullScreen);
  47. SetPackFileName(_T("Data"), _T("gui"));
  49. // Called during initial app startup, this function
  50. // performs all the permanent initialization.
  51. m_pD3DDevice = NULL;
  52. m_pD3DMaterial = NULL;
  54. // add your permanent init code here !
  55. m_pLight1 = m_pLight2 = NULL;
  56. m_pTexture = NULL;
  58. // generate the sphere data
  59. m_pSphere = new  CD3DSphere(OBSTACLE_RADIUS, 10);
  60. }
  62. // Called before the app exits, this function gives the app
  63. // the chance to cleanup after itself.
  64. CBoidsApp::~CBoidsApp()
  65. {
  66. // add your cleaup code here !
  67. if (m_pSphere != NULL)
  68. {
  69. delete  m_pSphere;
  70. m_pSphere = NULL;
  71. }
  72. }
  74. bool CBoidsApp::GetDXInitSettings(void)
  75. {
  76. if (m_pDirectSound != NULL)
  77. {
  78. if (m_pDirectSound->SelectDSDriver(0) == false)
  79. return  false;
  80. }
  82. if (m_pDirectMusic != NULL)
  83. {
  84. if (m_pDirectMusic->SelectDefaultDMusPort() == false)
  85. return  false;
  86. }
  88. if ((g_bUseVoodoo12 == false)
  89. || m_pDirectDraw->SelectDDDevice(0, 1) == false)
  90. {
  91. if (m_pDirectDraw->SelectDDDevice(0) == false)
  92. return  false;
  93. }
  95. if (g_bUseZBuffer)
  96. m_dwDDInitFlags |= CDDDevice::D3DIF_ZBUFFER;
  98. if (GetFirstDDDevice()->IsCanRenderWindowed() == false)
  99. {
  100. m_dwDDInitFlags &= ~CDDDevice::DDIF_WINDOWED;
  101. m_dwDDInitFlags &= ~CDDDevice::DDIF_NO_FLIP;
  102. }
  103. else
  104. {
  105. m_dwDDInitFlags |= CDDDevice::DDIF_NO_FLIP;
  106. }
  108. if (g_lpGuidD3DDevice == NULL)
  109. {
  110. if (GetFirstDDDevice()->SelectDefaultD3DDevice() == false)
  111. return  false;
  112. }
  113. else
  114. {
  115. if (GetFirstDDDevice()->SelectD3DDevice(g_lpGuidD3DDevice) == false)
  116. return  false;
  117. }
  118. if (GetFirstDDDevice()->SelectDisplayMode(
  119. IsFullScreen(), g_dwWidth, g_dwHeight, g_dwBPP) == false)
  120. return  false;
  122. return  true;
  123. }
  125. // Structure for holding data for each boid
  126. struct Boid
  127. {
  128. D3DVECTOR dvLoc;
  129. D3DVECTOR dvDir; // Current direction
  130. D3DVECTOR dvDeltaPos; // Change in position from flock centering
  131. D3DVECTOR dvDeltaDir; // Change in direction
  132. WORD wDeltaCnt; // Number of boids that influence this dvDeltaDir
  133. FLOAT fSpeed;
  134. FLOAT fYaw, fPitch, fRoll, fDYaw;
  135. FLOAT r, g, b; // Color of the boid
  136. FLOAT afDist[NUM_BOIDS]; // Array of boid distances, yuk what a waste
  137. CD3DMatrix matLocal;
  138. };
  140. Boid      g_pBoids[NUM_BOIDS];
  141. D3DVECTOR g_vObstacleLocations[NUM_OBSTACLES];
  142. D3DVECTOR g_vGoal;
  143. CD3DMatrix g_matGrid;
  145. const FLOAT InfluenceRadius        = 20.0f;
  146. const FLOAT InfluenceRadiusSquared = InfluenceRadius * InfluenceRadius;
  147. const FLOAT CollisionFraction      = 0.8f;
  148. const FLOAT InvCollisionFraction   = 1.0f/(1.0f-CollisionFraction);
  149. const FLOAT NormalSpeed            = 0.1f;
  150. const FLOAT AngleTweak             = 0.02f;
  151. const FLOAT PitchToSpeedRatio      = 0.002f;
  153. // Called during device intialization, this code checks the device
  154. // for some minimum set of capabilities, Initialize scene objects.
  155. bool CBoidsApp::InitDXObjects(void)
  156. {
  157. m_pD3DDevice = GetFirstD3DDevice();
  158. ASSERT(m_pD3DDevice != NULL);
  159. m_pD3DMaterial = m_pD3DDevice->GetD3DMaterial();
  160. // add your init code here !
  161. g_vGoal = D3DVECTOR(0.0f, 0.0f, 0.0f);
  163. for (WORD  i = 0; i < NUM_BOIDS; ++ i)
  164. {
  165. g_pBoids[i].dvLoc = D3DVECTOR(100.0f*(CDirectX::rnd()-CDirectX::rnd()), 10.0f*CDirectX::rnd(), 100.0f*(CDirectX::rnd()-CDirectX::rnd()));
  166. g_pBoids[i].dvDir = Normalize(D3DVECTOR(CDirectX::rnd()-CDirectX::rnd(), CDirectX::rnd()-CDirectX::rnd(), CDirectX::rnd()-CDirectX::rnd()));
  167. g_pBoids[i].fYaw = 0.0f;
  168. g_pBoids[i].fPitch = 0.0f;
  169. g_pBoids[i].fRoll  = 0.0f;
  170. g_pBoids[i].fDYaw  = 0.0f;
  171. g_pBoids[i].fSpeed = 0.1f;
  172. g_pBoids[i].r = CDirectX::rnd();
  173. g_pBoids[i].g = CDirectX::rnd();
  174. g_pBoids[i].b = CDirectX::rnd();
  176. FLOAT fMin = min( g_pBoids[i].r, min( g_pBoids[i].g, g_pBoids[i].b ) );
  177. FLOAT fMax = max( g_pBoids[i].r, min( g_pBoids[i].g, g_pBoids[i].b ) );
  179. g_pBoids[i].r = (g_pBoids[i].r - fMin) / (fMax-fMin);
  180. g_pBoids[i].g = (g_pBoids[i].g - fMin) / (fMax-fMin);
  181. g_pBoids[i].b = (g_pBoids[i].b - fMin) / (fMax-fMin);
  182. }
  184. // Position the obstacles
  185. g_vObstacleLocations[0] = D3DVECTOR( 100, 10,    0 );
  186. g_vObstacleLocations[1] = D3DVECTOR(-100, 10,    0 );
  187. g_vObstacleLocations[2] = D3DVECTOR(   0, 10,  100 );
  188. g_vObstacleLocations[3] = D3DVECTOR(   0, 10, -100 );
  189. for( i=4; i<NUM_OBSTACLES; i++ )
  190. g_vObstacleLocations[i] = D3DVECTOR( 100*(CDirectX::rnd()-CDirectX::rnd()), 10*CDirectX::rnd(), 100*(CDirectX::rnd()-CDirectX::rnd()) );
  192. FLOAT fSize   = GRID_WIDTH/(NUM_GRID-1.0f);
  193. FLOAT fOffset = GRID_WIDTH/2.0f;
  195. for (i = 0; i < NUM_GRID; ++ i)
  196. {
  197. for (WORD  j = 0; j < NUM_GRID; ++ j)
  198. {
  199. pvGridVertices[j+i*NUM_GRID] = D3DVERTEX( 
  200. D3DVECTOR( i*fSize-fOffset, 0.0f, j*fSize-fOffset ),
  201. D3DVECTOR( 0.0f, 1.0f, 0.0f ), 0.0f, 0.0f );
  202. }
  203. }
  205. // Points and normals which make up a boid geometry
  206. D3DVECTOR p1 = D3DVECTOR( 0.00f, 0.00f, 0.50f );
  207. D3DVECTOR p2 = D3DVECTOR( 0.50f, 0.00f,-0.50f );
  208. D3DVECTOR p3 = D3DVECTOR( 0.15f, 0.15f,-0.35f );
  209. D3DVECTOR p4 = D3DVECTOR(-0.15f, 0.15f,-0.35f );
  210. D3DVECTOR p5 = D3DVECTOR( 0.15f,-0.15f,-0.35f );
  211. D3DVECTOR p6 = D3DVECTOR(-0.15f,-0.15f,-0.35f );
  212. D3DVECTOR p7 = D3DVECTOR(-0.50f, 0.00f,-0.50f );
  213. D3DVECTOR n1 = ::Normalize( D3DVECTOR( 0.2f, 1.0f, 0.0f ) );
  214. D3DVECTOR n2 = ::Normalize( D3DVECTOR( 0.1f, 1.0f, 0.0f ) );
  215. D3DVECTOR n3 = Normalize( D3DVECTOR( 0.0f, 1.0f, 0.0f ) );
  216. D3DVECTOR n4 = Normalize( D3DVECTOR(-0.1f, 1.0f, 0.0f ) );
  217. D3DVECTOR n5 = Normalize( D3DVECTOR(-0.2f, 1.0f, 0.0f ) );
  218. D3DVECTOR n6 = Normalize( D3DVECTOR(-0.4f, 0.0f, -1.0f ) );
  219. D3DVECTOR n7 = Normalize( D3DVECTOR(-0.2f, 0.0f, -1.0f ) );
  220. D3DVECTOR n8 = Normalize( D3DVECTOR( 0.2f, 0.0f, -1.0f ) );
  221. D3DVECTOR n9 = Normalize( D3DVECTOR( 0.4f, 0.0f, -1.0f ) );
  223. // Vertices for the top
  224. m_pvBoidVertices[ 0] = D3DVERTEX( p1, n1, 0.000f, 0.500f );
  225. m_pvBoidVertices[ 1] = D3DVERTEX( p2, n2, 0.500f, 1.000f );
  226. m_pvBoidVertices[ 2] = D3DVERTEX( p3, n3, 0.425f, 0.575f );
  227. m_pvBoidVertices[ 3] = D3DVERTEX( p4, n4, 0.425f, 0.425f );
  228. m_pvBoidVertices[ 4] = D3DVERTEX( p7, n5, 0.500f, 0.000f );
  230. // Vertices for the bottom
  231. m_pvBoidVertices[ 5] = D3DVERTEX( p1, -n5, 1.000f, 0.500f );
  232. m_pvBoidVertices[ 6] = D3DVERTEX( p2, -n4, 0.500f, 1.000f );
  233. m_pvBoidVertices[ 7] = D3DVERTEX( p5, -n3, 0.575f, 0.575f );
  234. m_pvBoidVertices[ 8] = D3DVERTEX( p6, -n2, 0.575f, 0.425f );
  235. m_pvBoidVertices[ 9] = D3DVERTEX( p7, -n1, 0.500f, 0.000f );
  237. // Vertices for the  rear
  238. m_pvBoidVertices[10] = D3DVERTEX( p2, n6, 0.500f, 1.000f );
  239. m_pvBoidVertices[11] = D3DVERTEX( p3, n7, 0.425f, 0.575f );
  240. m_pvBoidVertices[12] = D3DVERTEX( p4, n8, 0.425f, 0.425f );
  241. m_pvBoidVertices[13] = D3DVERTEX( p7, n9, 0.500f, 0.000f );
  242. m_pvBoidVertices[14] = D3DVERTEX( p6, n8, 0.575f, 0.425f );
  243. m_pvBoidVertices[15] = D3DVERTEX( p5, n7, 0.575f, 0.575f );
  245. // Vertex inidices for the boid
  246. pwBoidIndices[ 0] =  0;
  247. pwBoidIndices[ 1] =  1;
  248. pwBoidIndices[ 2] =  2;
  249. pwBoidIndices[ 3] =  0;
  250. pwBoidIndices[ 4] =  2;
  251. pwBoidIndices[ 5] =  3;
  252. pwBoidIndices[ 6] =  0;
  253. pwBoidIndices[ 7] =  3;
  254. pwBoidIndices[ 8] =  4;
  255. pwBoidIndices[ 9] =  5;
  256. pwBoidIndices[10] =  7;
  257. pwBoidIndices[11] =  6;
  258. pwBoidIndices[12] =  5;
  259. pwBoidIndices[13] =  8;
  260. pwBoidIndices[14] =  7;
  261. pwBoidIndices[15] =  5;
  262. pwBoidIndices[16] =  9;
  263. pwBoidIndices[17] =  8;
  264. pwBoidIndices[18] = 10;
  265. pwBoidIndices[19] = 15;
  266. pwBoidIndices[20] = 11;
  267. pwBoidIndices[21] = 11;
  268. pwBoidIndices[22] = 15;
  269. pwBoidIndices[23] = 12;
  270. pwBoidIndices[24] = 12;
  271. pwBoidIndices[25] = 15;
  272. pwBoidIndices[26] = 14;
  273. pwBoidIndices[27] = 12;
  274. pwBoidIndices[28] = 14;
  275. pwBoidIndices[29] = 13;
  277. m_pD3DDevice->SetRenderState(D3DRENDERSTATE_AMBIENT, 0x0A0A0A0A);
  279. m_pTexture = new  CD3DTexture;
  280. if (m_pTexture->Create(m_pD3DDevice, _T("EARTH.BMP"), m_pPackFileManager, 0, 0) == false)
  281. return  false;
  283. m_pD3DDevice->SetTextureStageState(0, D3DTSS_COLORARG1, D3DTA_TEXTURE);
  284. m_pD3DDevice->SetTextureStageState(0, D3DTSS_COLORARG2, D3DTA_DIFFUSE);
  285. m_pD3DDevice->SetTextureStageState(0, D3DTSS_COLOROP, D3DTOP_MODULATE);
  287. m_pD3DDevice->SetTextureStageState(0, D3DTSS_MINFILTER, D3DTFN_LINEAR);
  288. m_pD3DDevice->SetTextureStageState(0, D3DTSS_MAGFILTER, D3DTFG_LINEAR);
  290. m_pD3DDevice->SetRenderState(D3DRENDERSTATE_DITHERENABLE, true);
  291. m_pD3DDevice->SetRenderState(D3DRENDERSTATE_SPECULARENABLE, false);
  293. CD3DMatrix matProj;
  294. FLOAT fAspect = ((FLOAT)m_pD3DDevice->GetHeight()) / m_pD3DDevice->GetWidth();
  295. matProj.SetProjection(/*0.75f*/0.9f, fAspect, 1.0f, 1000.0f);
  297. m_pD3DDevice->SetTransform(D3DTRANSFORMSTATE_PROJECTION, &matProj);
  299. m_pLight1 = new  CD3DDirectionalLight(-0.5f, -1.0f, -.3f);
  300. if (m_pLight1->Create(m_pD3DDevice) == false)
  301. return  false;
  302. if (m_pLight1->Enable(true) == false)
  303. return  false;
  305. D3DCOLORVALUE dcvLight2 = {0.5f, 0.5f, 0.5f, 0.0f};
  306. m_pLight2 = new  CD3DDirectionalLight(
  307. D3DVECTOR(0.5f, 1.0f, .3f),
  308. dcvLight2);
  309. if (m_pLight2->Create(m_pD3DDevice) == false)
  310. return  false;
  311. if (m_pLight2->Enable(true) == false)
  312. return  false;
  314. ASSERT(m_pD3DDevice->GetActiveLightsNumber() == 2);
  316. return  true;
  317. }
  319. // Called when the app is exitting, or the device is being changed,
  320. // this function deletes any device dependant objects.
  321. bool CBoidsApp::DestroyDXObjects(void)
  322. {
  323. // add your destroy code here !
  324. if (m_pTexture != NULL)
  325. {
  326. delete  m_pTexture;
  327. m_pTexture = NULL;
  328. }
  330. if (m_pLight1 != NULL)
  331. {
  332. delete  m_pLight1;
  333. m_pLight1 = NULL;
  334. }
  336. if (m_pLight2 != NULL)
  337. {
  338. delete  m_pLight2;
  339. m_pLight2 = NULL;
  340. }
  342. m_pD3DMaterial = NULL;
  343. m_pD3DDevice = NULL;
  344. return  CDirectXApp::DestroyDXObjects();
  345. }
  347. // Update posiiton of each boid in flock
  348. VOID UpdateFlock()
  349. {
  350. // first update the dist array 0.0..1.0 with 0.0 being furthest away
  351. for (WORD  i = 0; i < NUM_BOIDS; ++ i)
  352. {
  353. for (WORD  j = i + 1; j < NUM_BOIDS; ++ j)
  354. {
  355. FLOAT fDist = SquareMagnitude(g_pBoids[i].dvLoc - g_pBoids[j].dvLoc);
  356. fDist = InfluenceRadiusSquared - fDist;
  357. if( fDist < 0.0f )
  358. fDist = 0.0f;
  359. else
  360. fDist /= InfluenceRadiusSquared;
  362. g_pBoids[i].afDist[j] = g_pBoids[j].afDist[i] = fDist;
  363. }
  364. g_pBoids[i].afDist[i] = 0.0f;
  365. g_pBoids[i].dvDeltaDir = D3DVECTOR(0.0f, 0.0f, 0.0f);
  366. g_pBoids[i].dvDeltaPos = D3DVECTOR(0.0f, 0.0f, 0.0f);
  367. g_pBoids[i].wDeltaCnt = 0;
  368. }
  370. for (i = 0; i < NUM_BOIDS; ++ i)
  371. {
  372. for (WORD  j = i + 1; j < NUM_BOIDS; ++ j)
  373. {
  374. // if i is near j have them influence each other
  375. if (g_pBoids[i].afDist[j] > 0.0f)
  376. {
  377. D3DVECTOR vDiff = Normalize(g_pBoids[i].dvLoc - g_pBoids[j].dvLoc);
  378. D3DVECTOR vDelta;
  379. FLOAT fCollWeight = 0.0f; // collision weighting
  381. // only do collision testing against the nearest ones
  382. if (g_pBoids[i].afDist[j] - CollisionFraction > 0.0f)
  383. fCollWeight = (g_pBoids[i].afDist[j] - CollisionFraction) * InvCollisionFraction;
  385. // add in a little flock centering
  386. if (g_pBoids[i].afDist[j] - (1.0f-CollisionFraction) > 0.0f)
  387. fCollWeight -= g_pBoids[i].afDist[j] * (1.0f - fCollWeight);
  389. vDelta = fCollWeight * vDiff;
  391. // add in the collision avoidance
  392. g_pBoids[i].dvDeltaPos += vDelta;
  393. g_pBoids[j].dvDeltaPos -= vDelta;
  395. // add in the velocity influences
  396. g_pBoids[i].dvDeltaDir += g_pBoids[j].dvDir * g_pBoids[i].afDist[j];
  397. g_pBoids[j].dvDeltaDir += g_pBoids[i].dvDir * g_pBoids[i].afDist[j];
  398. g_pBoids[i].wDeltaCnt++;
  399. g_pBoids[j].wDeltaCnt++;
  400. }
  401. }
  402. }
  404. // update the boids
  405. for (i = 0; i < NUM_BOIDS; ++ i)
  406. {
  407. if (g_pBoids[i].wDeltaCnt)
  408. {
  409. g_pBoids[i].dvDeltaDir /= (FLOAT)g_pBoids[i].wDeltaCnt;
  410. g_pBoids[i].dvDeltaDir -= g_pBoids[i].dvDir;
  411. g_pBoids[i].dvDeltaDir *= 1.5f;
  412. }
  413. D3DVECTOR vDelta = g_pBoids[i].dvDeltaDir + g_pBoids[i].dvDeltaPos;
  414. D3DVECTOR vOffset;
  416. // add in the influence of the global goal
  417. D3DVECTOR vGoal = 0.5 * Normalize(g_vGoal - g_pBoids[i].dvLoc);
  418. vDelta += vGoal;
  420. // add in any obstacles
  421. for (WORD  j = 0; j < NUM_OBSTACLES; ++ j)
  422. {
  423. D3DVECTOR vOb = g_pBoids[i].dvLoc - g_vObstacleLocations[j];
  424. FLOAT fDist = Magnitude(vOb);
  426. if (fDist > 2 * OBSTACLE_RADIUS)
  427. continue;
  429. vOb /= fDist; // normalize
  430. fDist = 1.0f - fDist / (2 * OBSTACLE_RADIUS);
  431. vDelta += fDist * vOb * 5.0f;
  432. }
  434. // first deal with pitch changes
  435. if (vDelta.y > 0.01f)
  436. { // we're too low
  437. g_pBoids[i].fPitch += AngleTweak;
  438. if (g_pBoids[i].fPitch > 0.8f)
  439. g_pBoids[i].fPitch = 0.8f;
  440. }
  441. else if (vDelta.y < -0.01f)
  442. {   // we're too high
  443. g_pBoids[i].fPitch -= AngleTweak;
  444. if (g_pBoids[i].fPitch < -0.8f)
  445. g_pBoids[i].fPitch = -0.8f;
  446. } 
  447. else
  448. {
  449. // add damping
  450. g_pBoids[i].fPitch *= 0.98f;
  451. }
  453. // speed up or slow down depending on angle of attack
  454. g_pBoids[i].fSpeed -= g_pBoids[i].fPitch * PitchToSpeedRatio;
  455. // damp back to normal
  456. g_pBoids[i].fSpeed = (g_pBoids[i].fSpeed-NormalSpeed)*0.99f + NormalSpeed;
  458. if( g_pBoids[i].fSpeed < NormalSpeed/2 )
  459. g_pBoids[i].fSpeed = NormalSpeed/2;
  460. if( g_pBoids[i].fSpeed > NormalSpeed*5 )
  461. g_pBoids[i].fSpeed = NormalSpeed*5;
  463. // now figure out yaw changes
  464. vOffset = vDelta;
  465. vOffset.y = 0.0f;
  466. vDelta = g_pBoids[i].dvDir;
  467. vOffset = Normalize( vOffset );
  468. FLOAT fDot = DotProduct(vOffset, vDelta);
  470. // speed up slightly if not turning much
  471. if( fDot > 0.7f )
  472. {
  473. fDot -= 0.7f;
  474. g_pBoids[i].fSpeed += fDot * 0.005f;
  475. }
  476. vOffset = CrossProduct( vOffset, vDelta );
  477. fDot = (1.0f-fDot)/2.0f * 0.07f;
  478. if( vOffset.y > 0.05f )
  479. g_pBoids[i].fDYaw = (g_pBoids[i].fDYaw*19.0f + fDot) * 0.05f;
  480. else if( vOffset.y < -0.05f )
  481. g_pBoids[i].fDYaw = (g_pBoids[i].fDYaw*19.0f - fDot) * 0.05f;
  482. else
  483. g_pBoids[i].fDYaw *= 0.98f; // damp it
  485. g_pBoids[i].fYaw += g_pBoids[i].fDYaw;
  486. g_pBoids[i].fRoll = -g_pBoids[i].fDYaw * 20.0f;
  487. }
  488. }
  490. // Called once per frame, the call is the entry point for
  491. // animating the scene. This function sets up render states,
  492. // clears the viewport, and renders the scene.
  493. bool CBoidsApp::UpdateFrame(void)
  494. {
  495. // add your code here !
  496. static FLOAT tic = -200.0f * CDirectX::rnd();
  497. tic += 0.01f;
  499. CD3DMatrix matView;
  500. static D3DVECTOR vEyePt( 0.0f, 30.0f, 100.0f );
  501. static D3DVECTOR vLookatPt( 0.0f, 0.0f, 50.0f );
  502. static D3DVECTOR vUpVec( 0.0f, 1.0f, 0.0f );
  503. matView.SetView(vEyePt, vLookatPt, vUpVec);
  504. m_pD3DDevice->SetTransform(D3DTRANSFORMSTATE_VIEW, &matView);
  506. // Update grid matrix
  507. D3DVECTOR vOffset;
  508. vOffset.x = (FLOAT)floor(vLookatPt.x / 20) * 20.0f - 10.0f;
  509. vOffset.y = 0.0f;
  510. vOffset.z = (FLOAT)floor(vLookatPt.z / 20) * 20.0f - 10.0f;
  512. g_matGrid.SetTranslate(vOffset);
  514. UpdateFlock();
  516. vLookatPt = D3DVECTOR( 0.0f, 0.0f, 0.0f );
  517. // draw the boids
  518. for (WORD  i = 0; i < NUM_BOIDS; ++ i)
  519. {
  520. // Build the world matrix for the boid. First translate into place, 
  521. // then set orientation, then scale (if needed)
  522. CD3DMatrix matWorld;
  523. matWorld.SetTranslate(g_pBoids[i].dvLoc);
  525. CD3DMatrix matRotateY;
  526. matRotateY.SetRotateY(-g_pBoids[i].fYaw);
  528. CD3DMatrix matRotateX;
  529. matRotateX.SetRotateX(-g_pBoids[i].fPitch);
  531. CD3DMatrix matRotateZ;
  532. matRotateZ.SetRotateZ(-g_pBoids[i].fRoll);
  534. CD3DMatrix matTemp = matRotateX * matRotateY;
  535. matTemp = matRotateZ * matTemp;
  536. matWorld = matTemp * matWorld;
  538. g_pBoids[i].matLocal = matWorld;
  540. g_pBoids[i].dvDir.x = matWorld(2, 0);
  541. g_pBoids[i].dvDir.y = matWorld(2, 1);
  542. g_pBoids[i].dvDir.z = matWorld(2, 2);
  544. g_pBoids[i].dvLoc += g_pBoids[i].dvDir * g_pBoids[i].fSpeed;
  546. vLookatPt += g_pBoids[i].dvLoc;
  547. }
  548. vLookatPt /= NUM_BOIDS;
  549. vEyePt.x = vLookatPt.x + (FLOAT)(30.0f * ::sin(tic * 0.223));
  550. vEyePt.y = vLookatPt.y + (FLOAT)(21.0f + 20.0f * ::sin(tic * 0.33f));
  551. vEyePt.z = vLookatPt.z + (FLOAT)(30.0f * ::cos(tic * 0.31f));
  553. g_vGoal.x = 105.0f * (FLOAT)::sin(tic * 0.1f);
  554. g_vGoal.y = 10.0f;
  555. g_vGoal.z = 105.0f * (FLOAT)::cos(tic * 0.1f);
  557. m_pD3DDevice->Clear(RGBA_MAKE(0, 0, 0, 0));
  559. // Begin the scene
  560. if (SUCCEEDED(m_pD3DDevice->BeginScene()))
  561. {
  562. m_pD3DDevice->SetTexture(0, NULL);
  564. // Draw the north-south lines
  565. m_pD3DDevice->SetTransform(D3DTRANSFORMSTATE_WORLD, &g_matGrid);
  566. m_pD3DDevice->DrawPrimitive(D3DPT_LINELIST, D3DFVF_VERTEX,
  567. pvGridVertices, NUM_GRID * NUM_GRID, 0);
  569. // Draw the east-west lines
  570. CD3DMatrix matRotateY;
  571. matRotateY.SetRotateY(g_PI / 2.0f);
  573. // matRotateY = g_matGrid * matRotateY;
  574. matRotateY *= g_matGrid;
  575. m_pD3DDevice->SetTransform(D3DTRANSFORMSTATE_WORLD, &matRotateY);
  576. m_pD3DDevice->DrawPrimitive(D3DPT_LINELIST, D3DFVF_VERTEX,
  577. pvGridVertices, NUM_GRID*NUM_GRID, 0);
  579. // Draw the boids
  580. for (WORD  i = 0; i < NUM_BOIDS; ++ i)
  581. {
  582. // Set the color for the boid
  583. m_pD3DMaterial->SetColor(g_pBoids[i].r, g_pBoids[i].g, g_pBoids[i].b, 0.0f);
  584. m_pD3DMaterial->Set();
  586. // Apply the boid's local matrix
  587. m_pD3DDevice->SetTransform(D3DTRANSFORMSTATE_WORLD, &g_pBoids[i].matLocal);
  589. // Draw the boid
  590. m_pD3DDevice->DrawIndexedPrimitive(
  591. D3DPT_TRIANGLELIST, D3DFVF_VERTEX,
  592. m_pvBoidVertices, 16,
  593. pwBoidIndices, 30, 0);
  594. }
  596. // Draw the obstacles
  597. m_pD3DMaterial->SetColor(1.0f, 1.0f, 1.0f, 0.0f);
  598. m_pD3DMaterial->Set();
  600. m_pTexture->SetAsCurrent();
  602. for (i = 0; i < NUM_OBSTACLES; ++ i)
  603. {
  604. CD3DMatrix matWorld;
  605. matWorld.SetTranslate(g_vObstacleLocations[i]);
  606. m_pD3DDevice->SetTransform(D3DTRANSFORMSTATE_WORLD, &matWorld);
  608. // Draw the obstacle
  609. m_pSphere->Render(m_pD3DDevice);
  610. }
  612. // End the scene.
  613. m_pD3DDevice->EndScene();
  614. }
  616. return  CDirectXApp::UpdateFrame();
  617. }
  619. // ---- add your functions ! ----
  621. // ----
  622. #if _MSC_VER >= 1200 && _MSC_VER < 1400
  623. #ifdef _DEBUG
  624. #pragma comment(lib, "DXGuideD_VC6.lib")
  625. #else
  626. #pragma comment(lib, "DXGuide_VC6.lib")
  627. #endif // _DEBUG
  628. #endif // _MSC_VER
  630. #if _MSC_VER >= 1000 && _MSC_VER < 1200
  631. #ifdef _DEBUG
  632. #pragma comment(lib, "DXGuideD_VC5.lib")
  633. #else
  634. #pragma comment(lib, "DXGuide_VC5.lib")
  635. #endif // _DEBUG
  636. #endif // _MSC_VER
  638. BEGIN_MESSAGE_MAP(CBoidsApp, CDirectXApp)
  639. //{{AFX_MSG_MAP(CBoidsApp)
  640. //}}AFX_MSG_MAP
  641. END_MESSAGE_MAP()
  643. CBoidsApp theApp;