1 | // Dynamic texturing demo |
---|
2 | // |
---|
3 | // Feel free to use this for anything you want (Wumpus, OGRE Team 2004). This file is public domain. |
---|
4 | // Uses the Grey-Scott diffusion reaction process, a nice overview of the parameter space can be seen at |
---|
5 | // http://www.cacr.caltech.edu/ismap/image.html |
---|
6 | // |
---|
7 | // Some very cool effects can be reached with some combinations of parameters, varying the parameters |
---|
8 | // during growth gives even more curious things. |
---|
9 | // |
---|
10 | // Use 1-8 to change parameters, and 0 to reset to initial conditions |
---|
11 | |
---|
12 | #include "ExampleApplication.h" |
---|
13 | #include <OgreTexture.h> |
---|
14 | #include <OgreHardwarePixelBuffer.h> |
---|
15 | #include <OgreTextureManager.h> |
---|
16 | #include <OgreLogManager.h> |
---|
17 | #include <sstream> |
---|
18 | TexturePtr ptex; |
---|
19 | HardwarePixelBufferSharedPtr buffer; |
---|
20 | Overlay* overlay; |
---|
21 | static const int reactorExtent = 130; // must be 2^N + 2 |
---|
22 | uint32 clut[1024]; |
---|
23 | AnimationState *swim; |
---|
24 | // Nano fixed point library |
---|
25 | #define FROMFLOAT(X) ((int)((X)*((float)(1<<16)))) |
---|
26 | #define TOFLOAT(X) ((float)((X)/((float)(1<<16)))) |
---|
27 | #define MULT(X,Y) (((X)*(Y))>>16) |
---|
28 | ColourValue HSVtoRGB( float h, float s, float v ) |
---|
29 | { |
---|
30 | int i; |
---|
31 | ColourValue rv(0.0f, 0.0f, 0.0f, 1.0f); |
---|
32 | float f, p, q, t; |
---|
33 | h = fmodf(h, 360.0f); |
---|
34 | h /= 60.0f; // sector 0 to 5 |
---|
35 | i = (int)floor( h ); |
---|
36 | f = h - i; // factorial part of h |
---|
37 | p = v * ( 1.0f - s ); |
---|
38 | q = v * ( 1.0f - s * f ); |
---|
39 | t = v * ( 1.0f - s * ( 1.0f - f ) ); |
---|
40 | |
---|
41 | switch( i ) { |
---|
42 | case 0: rv.r = v; rv.g = t; rv.b = p; break; |
---|
43 | case 1: rv.r = q; rv.g = v; rv.b = p; break; |
---|
44 | case 2: rv.r = p; rv.g = v; rv.b = t; break; |
---|
45 | case 3: rv.r = p; rv.g = q; rv.b = v; break; |
---|
46 | case 4: rv.r = t; rv.g = p; rv.b = v; break; |
---|
47 | default: rv.r = v; rv.g = p; rv.b = q; break; |
---|
48 | } |
---|
49 | return rv; |
---|
50 | } |
---|
51 | class DynTexFrameListener : public ExampleFrameListener |
---|
52 | { |
---|
53 | private: |
---|
54 | static float fDefDim; |
---|
55 | static float fDefVel; |
---|
56 | float tim; |
---|
57 | |
---|
58 | int *chemical[2]; |
---|
59 | int *delta[2]; |
---|
60 | size_t mSize; |
---|
61 | int dt,hdiv0,hdiv1; // diffusion parameters |
---|
62 | int F,k; // reaction parameters |
---|
63 | |
---|
64 | bool rpressed; |
---|
65 | public: |
---|
66 | DynTexFrameListener(RenderWindow* win, Camera* cam) : ExampleFrameListener( win, cam ) |
---|
67 | { |
---|
68 | tim = 0; |
---|
69 | rpressed = false; |
---|
70 | // Create colour lookup |
---|
71 | for(unsigned int col=0; col<1024; col++) |
---|
72 | { |
---|
73 | ColourValue c; |
---|
74 | c = HSVtoRGB((1.0f-col/1024.0f)*90.0f+225.0f, 0.9f, 0.75f+0.25f*(1.0f-col/1024.0f)); |
---|
75 | c.a = 1.0f - col/1024.0f; |
---|
76 | PixelUtil::packColour(c, PF_A8R8G8B8, &clut[col]); |
---|
77 | } |
---|
78 | // Setup |
---|
79 | LogManager::getSingleton().logMessage("Creating chemical containment"); |
---|
80 | mSize = reactorExtent*reactorExtent; |
---|
81 | chemical[0] = new int [mSize]; |
---|
82 | chemical[1] = new int [mSize]; |
---|
83 | delta[0] = new int [mSize]; |
---|
84 | delta[1] = new int [mSize]; |
---|
85 | |
---|
86 | dt = FROMFLOAT(2.0f); |
---|
87 | hdiv0 = FROMFLOAT(2.0E-5f/(2.0f*0.01f*0.01f)); // a / (2.0f*h*h); -- really diffusion rate |
---|
88 | hdiv1 = FROMFLOAT(1.0E-5f/(2.0f*0.01f*0.01f)); // a / (2.0f*h*h); -- really diffusion rate |
---|
89 | //k = FROMFLOAT(0.056f); |
---|
90 | //F = FROMFLOAT(0.020f); |
---|
91 | k = FROMFLOAT(0.0619f); |
---|
92 | F = FROMFLOAT(0.0316f); |
---|
93 | |
---|
94 | resetReactor(); |
---|
95 | fireUpReactor(); |
---|
96 | updateInfoParamF(); |
---|
97 | updateInfoParamK(); |
---|
98 | updateInfoParamA0(); |
---|
99 | updateInfoParamA1(); |
---|
100 | |
---|
101 | LogManager::getSingleton().logMessage("Cthulhu dawn"); |
---|
102 | } |
---|
103 | void resetReactor() |
---|
104 | { |
---|
105 | LogManager::getSingleton().logMessage("Facilitating neutral start up conditions"); |
---|
106 | for(unsigned int x=0; x<mSize; x++) |
---|
107 | { |
---|
108 | chemical[0][x] = FROMFLOAT(1.0f); |
---|
109 | chemical[1][x] = FROMFLOAT(0.0f); |
---|
110 | } |
---|
111 | } |
---|
112 | void fireUpReactor() |
---|
113 | { |
---|
114 | LogManager::getSingleton().logMessage("Warning: reactor is being fired up"); |
---|
115 | int center = reactorExtent/2; |
---|
116 | for(unsigned int x=center-10; x<center+10; x++) |
---|
117 | { |
---|
118 | for(unsigned int y=center-10; y<center+10; y++) |
---|
119 | { |
---|
120 | chemical[0][y*reactorExtent+x] = FROMFLOAT(0.5f) + rand()%FROMFLOAT(0.1); |
---|
121 | chemical[1][y*reactorExtent+x] = FROMFLOAT(0.25f) + rand()%FROMFLOAT(0.1); |
---|
122 | } |
---|
123 | } |
---|
124 | LogManager::getSingleton().logMessage("Warning: reaction has begun"); |
---|
125 | } |
---|
126 | |
---|
127 | void runStep() |
---|
128 | { |
---|
129 | unsigned int x, y; |
---|
130 | for(x=0; x<mSize; x++) |
---|
131 | { |
---|
132 | delta[0][x] = 0; |
---|
133 | delta[1][x] = 0; |
---|
134 | } |
---|
135 | // Boundary conditions |
---|
136 | unsigned int idx; |
---|
137 | idx = 0; |
---|
138 | for(y=0; y<reactorExtent; y++) |
---|
139 | { |
---|
140 | chemical[0][idx] = chemical[0][idx+reactorExtent-2]; |
---|
141 | chemical[0][idx+reactorExtent-1] = chemical[0][idx+1]; |
---|
142 | chemical[1][idx] = chemical[1][idx+reactorExtent-2]; |
---|
143 | chemical[1][idx+reactorExtent-1] = chemical[1][idx+1]; |
---|
144 | idx += reactorExtent; |
---|
145 | } |
---|
146 | unsigned int skip = reactorExtent*(reactorExtent-1); |
---|
147 | for(y=0; y<reactorExtent; y++) |
---|
148 | { |
---|
149 | chemical[0][y] = chemical[0][y + skip - reactorExtent]; |
---|
150 | chemical[0][y + skip] = chemical[0][y + reactorExtent]; |
---|
151 | chemical[1][y] = chemical[1][y + skip - reactorExtent]; |
---|
152 | chemical[1][y + skip] = chemical[1][y + reactorExtent]; |
---|
153 | } |
---|
154 | // Diffusion |
---|
155 | idx = reactorExtent+1; |
---|
156 | for(y=0; y<reactorExtent-2; y++) |
---|
157 | { |
---|
158 | for(x=0; x<reactorExtent-2; x++) |
---|
159 | { |
---|
160 | delta[0][idx] += MULT(chemical[0][idx-reactorExtent] + chemical[0][idx-1] |
---|
161 | -4*chemical[0][idx] + chemical[0][idx+1] |
---|
162 | +chemical[0][idx+reactorExtent], hdiv0); |
---|
163 | delta[1][idx] += MULT(chemical[1][idx-reactorExtent] + chemical[1][idx-1] |
---|
164 | -4*chemical[1][idx] + chemical[1][idx+1] |
---|
165 | +chemical[1][idx+reactorExtent], hdiv1); |
---|
166 | idx++; |
---|
167 | } |
---|
168 | idx += 2; |
---|
169 | } |
---|
170 | // Reaction (Grey-Scott) |
---|
171 | idx = reactorExtent+1; |
---|
172 | int U,V; |
---|
173 | |
---|
174 | for(y=0; y<reactorExtent-2; y++) |
---|
175 | { |
---|
176 | for(x=0; x<reactorExtent-2; x++) |
---|
177 | { |
---|
178 | U = chemical[0][idx]; V = chemical[1][idx]; |
---|
179 | int UVV = MULT(MULT(U,V),V); |
---|
180 | delta[0][idx] += -UVV + MULT(F,(1<<16)-U); |
---|
181 | delta[1][idx] += UVV - MULT(F+k,V); |
---|
182 | idx++; |
---|
183 | } |
---|
184 | idx += 2; |
---|
185 | } |
---|
186 | // Update concentrations |
---|
187 | for(x=0; x<mSize; x++) |
---|
188 | { |
---|
189 | chemical[0][x] += MULT(delta[0][x], dt); |
---|
190 | chemical[1][x] += MULT(delta[1][x], dt); |
---|
191 | } |
---|
192 | } |
---|
193 | |
---|
194 | void buildTexture() |
---|
195 | { |
---|
196 | buffer->lock(HardwareBuffer::HBL_DISCARD); |
---|
197 | const PixelBox &pb = buffer->getCurrentLock(); |
---|
198 | unsigned int idx = reactorExtent+1; |
---|
199 | for(unsigned int y=0; y<(reactorExtent-2); y++) { |
---|
200 | uint32 *data = static_cast<uint32*>(pb.data) + y*pb.rowPitch; |
---|
201 | int *chem = &chemical[0][idx]; |
---|
202 | for(unsigned int x=0; x<(reactorExtent-2); x++) { |
---|
203 | data[x] = clut[(chem[x]>>6)&1023]; |
---|
204 | } |
---|
205 | idx += reactorExtent; |
---|
206 | } |
---|
207 | buffer->unlock(); |
---|
208 | } |
---|
209 | // GUI updaters |
---|
210 | void updateInfoParamK() |
---|
211 | { |
---|
212 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_K") \ |
---|
213 | ->setCaption("[1/2]k: "+StringConverter::toString(TOFLOAT(k))); |
---|
214 | } |
---|
215 | void updateInfoParamF() |
---|
216 | { |
---|
217 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_F") \ |
---|
218 | ->setCaption("[3/4]F: "+StringConverter::toString(TOFLOAT(F))); |
---|
219 | } |
---|
220 | void updateInfoParamA0() |
---|
221 | { |
---|
222 | // Diffusion rate for chemical 1 |
---|
223 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_A0") \ |
---|
224 | ->setCaption("[5/6]Diffusion 1: "+StringConverter::toString(TOFLOAT(hdiv0))); |
---|
225 | } |
---|
226 | void updateInfoParamA1() |
---|
227 | { |
---|
228 | // Diffusion rate for chemical 2 |
---|
229 | OverlayManager::getSingleton().getOverlayElement("Example/DynTex/Param_A1") \ |
---|
230 | ->setCaption("[7/8]Diffusion 2: "+StringConverter::toString(TOFLOAT(hdiv1))); |
---|
231 | } |
---|
232 | |
---|
233 | bool frameStarted( const FrameEvent& evt ) |
---|
234 | { |
---|
235 | using namespace OIS; |
---|
236 | if( ExampleFrameListener::frameStarted( evt ) == false ) |
---|
237 | return false; |
---|
238 | |
---|
239 | if( mKeyboard->isKeyDown( KC_1 ) ) { |
---|
240 | k -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
241 | updateInfoParamK(); |
---|
242 | } |
---|
243 | if( mKeyboard->isKeyDown( KC_2 ) ) { |
---|
244 | k += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
245 | updateInfoParamK(); |
---|
246 | } |
---|
247 | if( mKeyboard->isKeyDown( KC_3 ) ) { |
---|
248 | F -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
249 | updateInfoParamF(); |
---|
250 | } |
---|
251 | if( mKeyboard->isKeyDown( KC_4 ) ) { |
---|
252 | F += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
253 | updateInfoParamF(); |
---|
254 | } |
---|
255 | if( mKeyboard->isKeyDown( KC_5 ) ) { |
---|
256 | hdiv0 -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
257 | updateInfoParamA0(); |
---|
258 | } |
---|
259 | if( mKeyboard->isKeyDown( KC_6 ) ) { |
---|
260 | hdiv0 += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
261 | updateInfoParamA0(); |
---|
262 | } |
---|
263 | if( mKeyboard->isKeyDown( KC_7 ) ) { |
---|
264 | hdiv1 -= FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
265 | updateInfoParamA1(); |
---|
266 | } |
---|
267 | if( mKeyboard->isKeyDown( KC_8 ) ) { |
---|
268 | hdiv1 += FROMFLOAT(0.005f*evt.timeSinceLastFrame); |
---|
269 | updateInfoParamA1(); |
---|
270 | } |
---|
271 | |
---|
272 | if( mKeyboard->isKeyDown( KC_0 ) && !rpressed ) { |
---|
273 | // Reset 0 |
---|
274 | resetReactor(); |
---|
275 | fireUpReactor(); |
---|
276 | rpressed = true; |
---|
277 | } else { |
---|
278 | rpressed = false; |
---|
279 | } |
---|
280 | for(int x=0; x<10; x++) |
---|
281 | runStep(); |
---|
282 | buildTexture(); |
---|
283 | swim->addTime(evt.timeSinceLastFrame); |
---|
284 | |
---|
285 | return true; |
---|
286 | } |
---|
287 | |
---|
288 | virtual ~DynTexFrameListener(void) |
---|
289 | { |
---|
290 | delete [] chemical[0]; |
---|
291 | delete [] chemical[1]; |
---|
292 | delete [] delta[0]; |
---|
293 | delete [] delta[1]; |
---|
294 | } |
---|
295 | }; |
---|
296 | |
---|
297 | float DynTexFrameListener::fDefDim = 25.0f; |
---|
298 | float DynTexFrameListener::fDefVel = 50.0f; |
---|
299 | |
---|
300 | class DynTexApplication : public ExampleApplication |
---|
301 | { |
---|
302 | public: |
---|
303 | DynTexApplication() {} |
---|
304 | |
---|
305 | protected: |
---|
306 | |
---|
307 | |
---|
308 | virtual void createFrameListener(void) |
---|
309 | { |
---|
310 | mFrameListener= new DynTexFrameListener(mWindow, mCamera); |
---|
311 | mFrameListener->showDebugOverlay(true); |
---|
312 | mRoot->addFrameListener(mFrameListener); |
---|
313 | } |
---|
314 | |
---|
315 | |
---|
316 | virtual void createViewports(void) |
---|
317 | { |
---|
318 | // Create one viewport, entire window |
---|
319 | Viewport* vp = mWindow->addViewport(mCamera); |
---|
320 | vp->setBackgroundColour(ColourValue(0,0,0)); |
---|
321 | |
---|
322 | // Alter the camera aspect ratio to match the viewport |
---|
323 | mCamera->setAspectRatio( |
---|
324 | Real(vp->getActualWidth()) / Real(vp->getActualHeight())); |
---|
325 | } |
---|
326 | |
---|
327 | // Just override the mandatory create scene method |
---|
328 | void createScene(void) |
---|
329 | { |
---|
330 | // Create dynamic texture |
---|
331 | ptex = TextureManager::getSingleton().createManual( |
---|
332 | "DynaTex","General", TEX_TYPE_2D, reactorExtent-2, reactorExtent-2, 0, PF_A8R8G8B8, |
---|
333 | TU_DYNAMIC_WRITE_ONLY); |
---|
334 | buffer = ptex->getBuffer(0, 0); |
---|
335 | |
---|
336 | // Set ambient light |
---|
337 | mSceneMgr->setAmbientLight(ColourValue(0.6, 0.6, 0.6)); |
---|
338 | mSceneMgr->setSkyBox(true, "Examples/SpaceSkyBox", 50 ); |
---|
339 | |
---|
340 | //mRoot->getRenderSystem()->clearFrameBuffer(FBT_COLOUR, ColourValue(255,255,255,0)); |
---|
341 | |
---|
342 | // Create a light |
---|
343 | Light* l = mSceneMgr->createLight("MainLight"); |
---|
344 | l->setDiffuseColour(0.75, 0.75, 0.80); |
---|
345 | l->setSpecularColour(0.9, 0.9, 1); |
---|
346 | l->setPosition(-100,80,50); |
---|
347 | mSceneMgr->getRootSceneNode()->attachObject(l); |
---|
348 | |
---|
349 | |
---|
350 | Entity *planeEnt = mSceneMgr->createEntity("TexPlane1", Ogre::SceneManager::PT_PLANE); |
---|
351 | // Give the plane a texture |
---|
352 | planeEnt->setMaterialName("Examples/DynaTest"); |
---|
353 | |
---|
354 | SceneNode* node = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-100,-40,-100)); |
---|
355 | node->attachObject(planeEnt); |
---|
356 | node->setScale(3.0f, 3.0f, 3.0f); |
---|
357 | |
---|
358 | // Create objects |
---|
359 | SceneNode *blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-200,0,50)); |
---|
360 | Entity *ent2 = mSceneMgr->createEntity( "knot", "knot.mesh" ); |
---|
361 | ent2->setMaterialName("Examples/DynaTest4"); |
---|
362 | blaNode->attachObject( ent2 ); |
---|
363 | |
---|
364 | blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(200,-90,50)); |
---|
365 | ent2 = mSceneMgr->createEntity( "knot2", "knot.mesh" ); |
---|
366 | ent2->setMaterialName("Examples/DynaTest2"); |
---|
367 | blaNode->attachObject( ent2 ); |
---|
368 | blaNode = mSceneMgr->getRootSceneNode()->createChildSceneNode(Vector3(-110,200,50)); |
---|
369 | |
---|
370 | // Cloaked fish |
---|
371 | ent2 = mSceneMgr->createEntity( "knot3", "fish.mesh" ); |
---|
372 | ent2->setMaterialName("Examples/DynaTest3"); |
---|
373 | swim = ent2->getAnimationState("swim"); |
---|
374 | swim->setEnabled(true); |
---|
375 | blaNode->attachObject( ent2 ); |
---|
376 | blaNode->setScale(50.0f, 50.0f, 50.0f); |
---|
377 | |
---|
378 | |
---|
379 | //TextureManager::getSingleton().getByName("RustySteel.jpg"); |
---|
380 | |
---|
381 | |
---|
382 | std::stringstream d; |
---|
383 | d << "HardwarePixelBuffer " << buffer->getWidth() << " " << buffer->getHeight() << " " << buffer->getDepth(); |
---|
384 | LogManager::getSingleton().logMessage(d.str()); |
---|
385 | |
---|
386 | buffer->lock(HardwareBuffer::HBL_NORMAL); |
---|
387 | const PixelBox &pb = buffer->getCurrentLock(); |
---|
388 | d.str(""); |
---|
389 | d << "PixelBox " << pb.getWidth() << " " << pb.getHeight() << " " << pb.getDepth() << " " << pb.rowPitch << " " << pb.slicePitch << " " << pb.data << " " << PixelUtil::getFormatName(pb.format); |
---|
390 | LogManager::getSingleton().logMessage(d.str()); |
---|
391 | buffer->unlock(); |
---|
392 | |
---|
393 | // show GUI |
---|
394 | overlay = OverlayManager::getSingleton().getByName("Example/DynTexOverlay"); |
---|
395 | overlay->show(); |
---|
396 | } |
---|
397 | |
---|
398 | void destroyScene(void) |
---|
399 | { |
---|
400 | // Free resource pointers before shutdown |
---|
401 | ptex.setNull(); |
---|
402 | buffer.setNull(); |
---|
403 | } |
---|
404 | |
---|
405 | }; |
---|
406 | |
---|
407 | #ifdef __cplusplus |
---|
408 | extern "C" { |
---|
409 | #endif |
---|
410 | |
---|
411 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 |
---|
412 | #define WIN32_LEAN_AND_MEAN |
---|
413 | #include "windows.h" |
---|
414 | |
---|
415 | INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT ) |
---|
416 | #else |
---|
417 | int main(int argc, char *argv[]) |
---|
418 | #endif |
---|
419 | { |
---|
420 | // Create application object |
---|
421 | DynTexApplication app; |
---|
422 | |
---|
423 | try { |
---|
424 | app.go(); |
---|
425 | } catch( Ogre::Exception& e ) { |
---|
426 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 |
---|
427 | MessageBox( NULL, e.getFullDescription().c_str(), "An exception has occured!", MB_OK | MB_ICONERROR | MB_TASKMODAL); |
---|
428 | #else |
---|
429 | std::cerr << "An exception has occured: " << |
---|
430 | e.getFullDescription().c_str() << std::endl; |
---|
431 | #endif |
---|
432 | } |
---|
433 | |
---|
434 | return 0; |
---|
435 | } |
---|
436 | |
---|
437 | #ifdef __cplusplus |
---|
438 | } |
---|
439 | #endif |
---|