1 /** Example 011 Per-Pixel Lighting
2
3 This tutorial shows how to use one of the built in more complex materials in
4 irrlicht: Per pixel lighted surfaces using normal maps and parallax mapping. It
5 will also show how to use fog and moving particle systems. And don't panic: You
6 do not need any experience with shaders to use these materials in Irrlicht.
7
8 At first, we need to include all headers and do the stuff we always do, like in
9 nearly all other tutorials.
10 */
11 #include <irrlicht.h>
12 #include "driverChoice.h"
13
14 using namespace irr;
15
16 #ifdef _MSC_VER
17 #pragma comment(lib, "Irrlicht.lib")
18 #endif
19
20 /*
21 For this example, we need an event receiver, to make it possible for the user
22 to switch between the three available material types. In addition, the event
23 receiver will create some small GUI window which displays what material is
24 currently being used. There is nothing special done in this class, so maybe you
25 want to skip reading it.
26 */
27 class MyEventReceiver : public IEventReceiver
28 {
29 public:
30
MyEventReceiver(scene::ISceneNode * room,scene::ISceneNode * earth,gui::IGUIEnvironment * env,video::IVideoDriver * driver)31 MyEventReceiver(scene::ISceneNode* room,scene::ISceneNode* earth,
32 gui::IGUIEnvironment* env, video::IVideoDriver* driver)
33 {
34 // store pointer to room so we can change its drawing mode
35 Room = room;
36 Earth = earth;
37 Driver = driver;
38
39 // set a nicer font
40 gui::IGUISkin* skin = env->getSkin();
41 gui::IGUIFont* font = env->getFont("../../media/fonthaettenschweiler.bmp");
42 if (font)
43 skin->setFont(font);
44
45 // add window and listbox
46 gui::IGUIWindow* window = env->addWindow(
47 core::rect<s32>(460,375,630,470), false, L"Use 'E' + 'R' to change");
48
49 ListBox = env->addListBox(
50 core::rect<s32>(2,22,165,88), window);
51
52 ListBox->addItem(L"Diffuse");
53 ListBox->addItem(L"Bump mapping");
54 ListBox->addItem(L"Parallax mapping");
55 ListBox->setSelected(1);
56
57 // create problem text
58 ProblemText = env->addStaticText(
59 L"Your hardware or this renderer is not able to use the "\
60 L"needed shaders for this material. Using fall back materials.",
61 core::rect<s32>(150,20,470,80));
62
63 ProblemText->setOverrideColor(video::SColor(100,255,255,255));
64
65 // set start material (prefer parallax mapping if available)
66 video::IMaterialRenderer* renderer =
67 Driver->getMaterialRenderer(video::EMT_PARALLAX_MAP_SOLID);
68 if (renderer && renderer->getRenderCapability() == 0)
69 ListBox->setSelected(2);
70
71 // set the material which is selected in the listbox
72 setMaterial();
73 }
74
OnEvent(const SEvent & event)75 bool OnEvent(const SEvent& event)
76 {
77 // check if user presses the key 'E' or 'R'
78 if (event.EventType == irr::EET_KEY_INPUT_EVENT &&
79 !event.KeyInput.PressedDown && Room && ListBox)
80 {
81 // change selected item in listbox
82
83 int sel = ListBox->getSelected();
84 if (event.KeyInput.Key == irr::KEY_KEY_R)
85 ++sel;
86 else
87 if (event.KeyInput.Key == irr::KEY_KEY_E)
88 --sel;
89 else
90 return false;
91
92 if (sel > 2) sel = 0;
93 if (sel < 0) sel = 2;
94 ListBox->setSelected(sel);
95
96 // set the material which is selected in the listbox
97 setMaterial();
98 }
99
100 return false;
101 }
102
103 private:
104
105 // sets the material of the room mesh the the one set in the
106 // list box.
setMaterial()107 void setMaterial()
108 {
109 video::E_MATERIAL_TYPE type = video::EMT_SOLID;
110
111 // change material setting
112 switch(ListBox->getSelected())
113 {
114 case 0: type = video::EMT_SOLID;
115 break;
116 case 1: type = video::EMT_NORMAL_MAP_SOLID;
117 break;
118 case 2: type = video::EMT_PARALLAX_MAP_SOLID;
119 break;
120 }
121
122 Room->setMaterialType(type);
123
124 // change material setting
125 switch(ListBox->getSelected())
126 {
127 case 0: type = video::EMT_TRANSPARENT_VERTEX_ALPHA;
128 break;
129 case 1: type = video::EMT_NORMAL_MAP_TRANSPARENT_VERTEX_ALPHA;
130 break;
131 case 2: type = video::EMT_PARALLAX_MAP_TRANSPARENT_VERTEX_ALPHA;
132 break;
133 }
134
135 Earth->setMaterialType(type);
136
137 /*
138 We need to add a warning if the materials will not be able to
139 be displayed 100% correctly. This is no problem, they will be
140 rendered using fall back materials, but at least the user
141 should know that it would look better on better hardware. We
142 simply check if the material renderer is able to draw at full
143 quality on the current hardware. The
144 IMaterialRenderer::getRenderCapability() returns 0 if this is
145 the case.
146 */
147 video::IMaterialRenderer* renderer = Driver->getMaterialRenderer(type);
148
149 // display some problem text when problem
150 if (!renderer || renderer->getRenderCapability() != 0)
151 ProblemText->setVisible(true);
152 else
153 ProblemText->setVisible(false);
154 }
155
156 private:
157
158 gui::IGUIStaticText* ProblemText;
159 gui::IGUIListBox* ListBox;
160
161 scene::ISceneNode* Room;
162 scene::ISceneNode* Earth;
163 video::IVideoDriver* Driver;
164 };
165
166
167 /*
168 Now for the real fun. We create an Irrlicht Device and start to setup the scene.
169 */
main()170 int main()
171 {
172 // ask user for driver
173 video::E_DRIVER_TYPE driverType=driverChoiceConsole();
174 if (driverType==video::EDT_COUNT)
175 return 1;
176
177 // create device
178
179 IrrlichtDevice* device = createDevice(driverType,
180 core::dimension2d<u32>(640, 480));
181
182 if (device == 0)
183 return 1; // could not create selected driver.
184
185 /*
186 Before we start with the interesting stuff, we do some simple things:
187 Store pointers to the most important parts of the engine (video driver,
188 scene manager, gui environment) to safe us from typing too much, add an
189 irrlicht engine logo to the window and a user controlled first person
190 shooter style camera. Also, we let the engine know that it should store
191 all textures in 32 bit. This necessary because for parallax mapping, we
192 need 32 bit textures.
193 */
194
195 video::IVideoDriver* driver = device->getVideoDriver();
196 scene::ISceneManager* smgr = device->getSceneManager();
197 gui::IGUIEnvironment* env = device->getGUIEnvironment();
198
199 driver->setTextureCreationFlag(video::ETCF_ALWAYS_32_BIT, true);
200
201 // add irrlicht logo
202 env->addImage(driver->getTexture("../../media/irrlichtlogo3.png"),
203 core::position2d<s32>(10,10));
204
205 // add camera
206 scene::ICameraSceneNode* camera = smgr->addCameraSceneNodeFPS();
207 camera->setPosition(core::vector3df(-200,200,-200));
208
209 // disable mouse cursor
210 device->getCursorControl()->setVisible(false);
211
212 /*
213 Because we want the whole scene to look a little bit scarier, we add
214 some fog to it. This is done by a call to IVideoDriver::setFog(). There
215 you can set various fog settings. In this example, we use pixel fog,
216 because it will work well with the materials we'll use in this example.
217 Please note that you will have to set the material flag EMF_FOG_ENABLE
218 to 'true' in every scene node which should be affected by this fog.
219 */
220 driver->setFog(video::SColor(0,138,125,81), video::EFT_FOG_LINEAR, 250, 1000, .003f, true, false);
221
222 /*
223 To be able to display something interesting, we load a mesh from a .3ds
224 file which is a room I modeled with anim8or. It is the same room as
225 from the specialFX example. Maybe you remember from that tutorial, I am
226 no good modeler at all and so I totally messed up the texture mapping
227 in this model, but we can simply repair it with the
228 IMeshManipulator::makePlanarTextureMapping() method.
229 */
230
231 scene::IAnimatedMesh* roomMesh = smgr->getMesh("../../media/room.3ds");
232 scene::ISceneNode* room = 0;
233 scene::ISceneNode* earth = 0;
234
235 if (roomMesh)
236 {
237 // The Room mesh doesn't have proper Texture Mapping on the
238 // floor, so we can recreate them on runtime
239 smgr->getMeshManipulator()->makePlanarTextureMapping(
240 roomMesh->getMesh(0), 0.003f);
241
242 /*
243 Now for the first exciting thing: If we successfully loaded the
244 mesh we need to apply textures to it. Because we want this room
245 to be displayed with a very cool material, we have to do a
246 little bit more than just set the textures. Instead of only
247 loading a color map as usual, we also load a height map which
248 is simply a grayscale texture. From this height map, we create
249 a normal map which we will set as second texture of the room.
250 If you already have a normal map, you could directly set it,
251 but I simply didn't find a nice normal map for this texture.
252 The normal map texture is being generated by the
253 makeNormalMapTexture method of the VideoDriver. The second
254 parameter specifies the height of the heightmap. If you set it
255 to a bigger value, the map will look more rocky.
256 */
257
258 video::ITexture* normalMap =
259 driver->getTexture("../../media/rockwall_height.bmp");
260
261 if (normalMap)
262 driver->makeNormalMapTexture(normalMap, 9.0f);
263 /*
264 // The Normal Map and the displacement map/height map in the alpha channel
265 video::ITexture* normalMap =
266 driver->getTexture("../../media/rockwall_NRM.tga");
267 */
268 /*
269 But just setting color and normal map is not everything. The
270 material we want to use needs some additional informations per
271 vertex like tangents and binormals. Because we are too lazy to
272 calculate that information now, we let Irrlicht do this for us.
273 That's why we call IMeshManipulator::createMeshWithTangents().
274 It creates a mesh copy with tangents and binormals from another
275 mesh. After we've done that, we simply create a standard
276 mesh scene node with this mesh copy, set color and normal map
277 and adjust some other material settings. Note that we set
278 EMF_FOG_ENABLE to true to enable fog in the room.
279 */
280
281 scene::IMesh* tangentMesh = smgr->getMeshManipulator()->
282 createMeshWithTangents(roomMesh->getMesh(0));
283
284 room = smgr->addMeshSceneNode(tangentMesh);
285 room->setMaterialTexture(0,
286 driver->getTexture("../../media/rockwall.jpg"));
287 room->setMaterialTexture(1, normalMap);
288
289 // Stones don't glitter..
290 room->getMaterial(0).SpecularColor.set(0,0,0,0);
291 room->getMaterial(0).Shininess = 0.f;
292
293 room->setMaterialFlag(video::EMF_FOG_ENABLE, true);
294 room->setMaterialType(video::EMT_PARALLAX_MAP_SOLID);
295 // adjust height for parallax effect
296 room->getMaterial(0).MaterialTypeParam = 1.f / 64.f;
297
298 // drop mesh because we created it with a create.. call.
299 tangentMesh->drop();
300 }
301
302 /*
303 After we've created a room shaded by per pixel lighting, we add a
304 sphere into it with the same material, but we'll make it transparent.
305 In addition, because the sphere looks somehow like a familiar planet,
306 we make it rotate. The procedure is similar as before. The difference
307 is that we are loading the mesh from an .x file which already contains
308 a color map so we do not need to load it manually. But the sphere is a
309 little bit too small for our needs, so we scale it by the factor 50.
310 */
311
312 // add earth sphere
313
314 scene::IAnimatedMesh* earthMesh = smgr->getMesh("../../media/earth.x");
315 if (earthMesh)
316 {
317 //perform various task with the mesh manipulator
318 scene::IMeshManipulator *manipulator = smgr->getMeshManipulator();
319
320 // create mesh copy with tangent informations from original earth.x mesh
321 scene::IMesh* tangentSphereMesh =
322 manipulator->createMeshWithTangents(earthMesh->getMesh(0));
323
324 // set the alpha value of all vertices to 200
325 manipulator->setVertexColorAlpha(tangentSphereMesh, 200);
326
327 // scale the mesh by factor 50
328 core::matrix4 m;
329 m.setScale ( core::vector3df(50,50,50) );
330 manipulator->transform( tangentSphereMesh, m );
331
332 earth = smgr->addMeshSceneNode(tangentSphereMesh);
333
334 earth->setPosition(core::vector3df(-70,130,45));
335
336 // load heightmap, create normal map from it and set it
337 video::ITexture* earthNormalMap = driver->getTexture("../../media/earthbump.jpg");
338 if (earthNormalMap)
339 {
340 driver->makeNormalMapTexture(earthNormalMap, 20.0f);
341 earth->setMaterialTexture(1, earthNormalMap);
342 earth->setMaterialType(video::EMT_NORMAL_MAP_TRANSPARENT_VERTEX_ALPHA);
343 }
344
345 // adjust material settings
346 earth->setMaterialFlag(video::EMF_FOG_ENABLE, true);
347
348 // add rotation animator
349 scene::ISceneNodeAnimator* anim =
350 smgr->createRotationAnimator(core::vector3df(0,0.1f,0));
351 earth->addAnimator(anim);
352 anim->drop();
353
354 // drop mesh because we created it with a create.. call.
355 tangentSphereMesh->drop();
356 }
357
358 /*
359 Per pixel lighted materials only look cool when there are moving
360 lights. So we add some. And because moving lights alone are so boring,
361 we add billboards to them, and a whole particle system to one of them.
362 We start with the first light which is red and has only the billboard
363 attached.
364 */
365
366 // add light 1 (more green)
367 scene::ILightSceneNode* light1 =
368 smgr->addLightSceneNode(0, core::vector3df(0,0,0),
369 video::SColorf(0.5f, 1.0f, 0.5f, 0.0f), 800.0f);
370
371 light1->setDebugDataVisible ( scene::EDS_BBOX );
372
373
374 // add fly circle animator to light 1
375 scene::ISceneNodeAnimator* anim =
376 smgr->createFlyCircleAnimator (core::vector3df(50,300,0),190.0f, -0.003f);
377 light1->addAnimator(anim);
378 anim->drop();
379
380 // attach billboard to the light
381 scene::IBillboardSceneNode* bill =
382 smgr->addBillboardSceneNode(light1, core::dimension2d<f32>(60, 60));
383
384 bill->setMaterialFlag(video::EMF_LIGHTING, false);
385 bill->setMaterialFlag(video::EMF_ZWRITE_ENABLE, false);
386 bill->setMaterialType(video::EMT_TRANSPARENT_ADD_COLOR);
387 bill->setMaterialTexture(0, driver->getTexture("../../media/particlegreen.jpg"));
388
389 /*
390 Now the same again, with the second light. The difference is that we
391 add a particle system to it too. And because the light moves, the
392 particles of the particlesystem will follow. If you want to know more
393 about how particle systems are created in Irrlicht, take a look at the
394 specialFx example. Maybe you will have noticed that we only add 2
395 lights, this has a simple reason: The low end version of this material
396 was written in ps1.1 and vs1.1, which doesn't allow more lights. You
397 could add a third light to the scene, but it won't be used to shade the
398 walls. But of course, this will change in future versions of Irrlicht
399 where higher versions of pixel/vertex shaders will be implemented too.
400 */
401
402 // add light 2 (red)
403 scene::ISceneNode* light2 =
404 smgr->addLightSceneNode(0, core::vector3df(0,0,0),
405 video::SColorf(1.0f, 0.2f, 0.2f, 0.0f), 800.0f);
406
407 // add fly circle animator to light 2
408 anim = smgr->createFlyCircleAnimator(core::vector3df(0,150,0), 200.0f,
409 0.001f, core::vector3df(0.2f, 0.9f, 0.f));
410 light2->addAnimator(anim);
411 anim->drop();
412
413 // attach billboard to light
414 bill = smgr->addBillboardSceneNode(light2, core::dimension2d<f32>(120, 120));
415 bill->setMaterialFlag(video::EMF_LIGHTING, false);
416 bill->setMaterialFlag(video::EMF_ZWRITE_ENABLE, false);
417 bill->setMaterialType(video::EMT_TRANSPARENT_ADD_COLOR);
418 bill->setMaterialTexture(0, driver->getTexture("../../media/particlered.bmp"));
419
420 // add particle system
421 scene::IParticleSystemSceneNode* ps =
422 smgr->addParticleSystemSceneNode(false, light2);
423
424 // create and set emitter
425 scene::IParticleEmitter* em = ps->createBoxEmitter(
426 core::aabbox3d<f32>(-3,0,-3,3,1,3),
427 core::vector3df(0.0f,0.03f,0.0f),
428 80,100,
429 video::SColor(10,255,255,255), video::SColor(10,255,255,255),
430 400,1100);
431 em->setMinStartSize(core::dimension2d<f32>(30.0f, 40.0f));
432 em->setMaxStartSize(core::dimension2d<f32>(30.0f, 40.0f));
433
434 ps->setEmitter(em);
435 em->drop();
436
437 // create and set affector
438 scene::IParticleAffector* paf = ps->createFadeOutParticleAffector();
439 ps->addAffector(paf);
440 paf->drop();
441
442 // adjust some material settings
443 ps->setMaterialFlag(video::EMF_LIGHTING, false);
444 ps->setMaterialFlag(video::EMF_ZWRITE_ENABLE, false);
445 ps->setMaterialTexture(0, driver->getTexture("../../media/fireball.bmp"));
446 ps->setMaterialType(video::EMT_TRANSPARENT_ADD_COLOR);
447
448 MyEventReceiver receiver(room, earth, env, driver);
449 device->setEventReceiver(&receiver);
450
451 /*
452 Finally, draw everything. That's it.
453 */
454
455 int lastFPS = -1;
456
457 while(device->run())
458 if (device->isWindowActive())
459 {
460 driver->beginScene(true, true, 0);
461
462 smgr->drawAll();
463 env->drawAll();
464
465 driver->endScene();
466
467 int fps = driver->getFPS();
468
469 if (lastFPS != fps)
470 {
471 core::stringw str = L"Per pixel lighting example - Irrlicht Engine [";
472 str += driver->getName();
473 str += "] FPS:";
474 str += fps;
475
476 device->setWindowCaption(str.c_str());
477 lastFPS = fps;
478 }
479 }
480
481 device->drop();
482
483 return 0;
484 }
485
486 /*
487 **/
488
