SMART TUTORIAL

[geronika2004]

I have put everything together, maybe this smart tutorial will be helpful

WRITE IMAGE TO FILE:

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   IImage* image = Device.driver->createScreenShot(); 
    
   if (image) 
      { 
      Device.driver->writeImageToFile(image, "c:\\images\\dump.jpeg"); 
      Device.driver->writeImageToFile(image, "c:\\images\\dump.png"); 
      Device.driver->writeImageToFile(image, "c:\\images\\dump.bmp"); 
      Device.driver->writeImageToFile(image, "c:\\images\\dump.tga"); 
      Device.driver->writeImageToFile(image, "c:\\images\\dump.jpg"); 
      image->drop(); 
      }

LOAD IMAGE (256X256) FROM FILE, CHANGE PIXEL AND SAVE:

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video::ITexture * image1 = driver->getTexture("d:\\x\\map.bmp");
//driver->makeColorKeyTexture(image1, core::position2d<s32>(0,0));
u8 * ff=(u8 *)image1->lock();
IImage* im = driver->createImageFromData(image1->getColorFormat(), dimension2d<s32>(256,256), ff);
im->setPixel(100,100,SColor(255,255,0,0));
driver->writeImageToFile(im,"D:\\x\\map.bmp");
im->drop();

CHANGE CAPTION FUNCTION:

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void showCaptionVar(std::string txt)
{
		std::string gio1=txt;
		char gio2[512];
		strcpy_s(gio2, gio1.c_str());
		core::stringw gio3 = gio2;
		device->setWindowCaption(gio3.c_str());
}

EVENTS:

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class mvm:public IEventReceiver 
{
	public: 		
	bool OnEvent(const SEvent &e)
	{
static bool pwheel=false;
		if (e.EventType==EEVENT_TYPE::EET_MOUSE_INPUT_EVENT)
		{
			if (e.MouseInput.Wheel==-1)
			{
			}else if (e.MouseInput.Wheel==1)
			{
			}
			if (e.MouseInput.Event==irr::EMIE_RMOUSE_PRESSED_DOWN)
			{
				mox=e.MouseInput.X;
				moy=e.MouseInput.Y;
			}
			if (e.MouseInput.Event==irr::EMIE_RMOUSE_LEFT_UP)
			{
			}
			if (e.MouseInput.Event==irr::EMIE_MOUSE_MOVED)
			{
			}
		}
if(e.MouseInput.Wheel)
		{
			if (pwheel==false)
			{
				//middle button down event
				pwheel=true;
			}else{
				//middle button up event
				pwheel=false;
			}
		}
		if (e.EventType==irr::EEVENT_TYPE::EET_GUI_EVENT)
		{
			s32 id = e.GUIEvent.Caller->getID();
			switch (e.GUIEvent.EventType)
			{
			case gui::EGUI_EVENT_TYPE::EGET_BUTTON_CLICKED:
				{
					if (id==2)
					{
						
					}
				break;
				}
				case gui::EGUI_EVENT_TYPE::EGET_ELEMENT_FOCUSED
			{
				if (id==2)
				{
					//gui::
					z=z+10;
				}
			break;
			}
			}
		}
		if (e.EventType==EET_KEY_INPUT_EVENT)
		{
			switch (e.KeyInput.Key)
			{
			case KEY_KEY_W:
				{
					wasd[0]=e.KeyInput.PressedDown;
					break;
				}
			case KEY_ESCAPE: 
				{
					device->closeDevice(); 
					break;
				}    
			return true;
			}
			return false;
		}
		return false;
	}
};

BASIC VARIABLES:

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#include "irrlicht.h"
#include <SIrrCreationParameters.h>
using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

#ifdef _MSC_VER
#pragma comment(lib, "Irrlicht.lib")
#endif 

IrrlichtDevice					* device;
video::IVideoDriver				* driver;
scene::ISceneManager				* smgr;
scene::ICameraSceneNode				* cam;

irr::SIrrlichtCreationParameters pars;
pars.EventReceiver=&receiver;
pars.AntiAlias=true;
pars.Fullscreen=true;
pars.DriverType=video::EDT_DIRECT3D9;
pars.WindowSize=core::dimension2d<s32>(1024,768);
pars.Bits=32;
device  = createDeviceEx(pars);
driver = device->getVideoDriver();
driver->setTextureCreationFlag(video::ETCF_ALWAYS_32_BIT, true);

smgr = device->getSceneManager();
cam= smgr->addCameraSceneNode();
cam->setFarValue(50000.0f);

COLLISION DETECTION WITH BOUNDING BOXES

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bool collision(ISceneNode* one, ISceneNode* two) { 
   aabbox3d<f32> b1, b2; 

   b1 = one->getBoundingBox (); 
   b2 = two->getBoundingBox (); 

   one->getRelativeTransformation().transformBoxEx( b1 ); 
   two->getRelativeTransformation().transformBoxEx( b2 ); 
   return b1.intersectsWithBox( b2 ); 
}
//OTHER WAY
//bool collision(ISceneNode* one, ISceneNode* two) { 
//if(one->getTransformedBoundingBox().intersectsWithBox(two->getTransformedBoundingBox())) { 
//return (one->getTransformedBoundingBox().intersectsWithBox(two->getTransformedBoundingBox()));
//} 
//return false; 
//}

SHOW BOUNDING BOX (debugging)

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node->setDebugDataVisible(scene::EDS_BBOX);

MOVE NODE

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core::vector3df v=node->getPosition();
v.X+=1.0f;
node->setPosition(vector3df(v));

TEXTURES

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irr::video::ITexture * texture[1];
texture[0]=driver->getTexture("c:/x/0.bmp");
texture[1]=driver->getTexture("c:/x/1.bmp");
node->setMaterialTexture(0,texture[0]);
node->setMaterialTexture(1,texture[1]);
node->setMaterialFlag(EMF_LIGHTING, false);
node->setMaterialType(video::EMT_REFLECTION_2_LAYER);

REMOVE CONSOLE WINDOW

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#pragma comment(linker, "/SUBSYSTEM:windows /ENTRY:mainCRTStartup")
int main()
{
return 0;
}

ATTACH TO BONE (Add Child to Joint)

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ISceneNode * bone=node->getJointNode("Bone1");
bone->addChild(node2);

CREATE BILLBOARD

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IBillboardSceneNode * bill = smgr->addBillboardSceneNode();
bill->setMaterialType(EMT_TRANSPARENT_ADD_COLOR );
bill->setMaterialTexture(0, driver->getTexture("c:/x/b1.bmp"));
bill->setMaterialFlag(video::EMF_LIGHTING, false);
bill->setSize(dimension2d<f32>(10.0f, 10.0f)); 
bill->setPosition(vector3df(1.0f, 0.0f, 110.0f));

ADD ANIMATOR

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irr::scene::ISceneNodeAnimator * anim = smgr->createFlyCircleAnimator (core::vector3df(0,55,110),5.0f, 0.01,core::vector3df(1,0,1));
bill->addAnimator(anim);
anim->drop();

ADD LIGHT

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scene::ILightSceneNode* nodeLight = smgr->addLightSceneNode(0, core::vector3df(100, 100, 100),
      video::SColorf(1.0f,1.0f,1.0f,1.0f),
      20000.0f);
video::SLight light;   
light.Direction = core::vector3df(100, 100, 0);
light.Type = video::ELT_DIRECTIONAL;
light.AmbientColor = video::SColorf(0.3f,0.3f,0.3f,1);
light.SpecularColor= video::SColorf(0.4f,0.4f,0.4f,1);
light.DiffuseColor = video::SColorf(1.0f,1.0f,1.0f,1);
light.CastShadows = false;
   
nodeLight->setLightData(light);

CREATE A PARTICLE SYSTEM

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// create a particle system
scene::IParticleSystemSceneNode* ps = smgr->addParticleSystemSceneNode(false);

scene::IParticleEmitter* em = ps->createBoxEmitter(
    core::aabbox3d<f32>(-7,0,-7,7,1,7),		// emitter size
    core::vector3df(0.0f,-0.06f,0.0f),		// initial direction
    10,100,							// emit rate
    video::SColor(0,0,0,255),				// darkest color
    video::SColor(0,255,255,255),			// brightest color
    80,20000,0,						// min and max age, angle
    core::dimension2df(5.f,5.f),			// min size
    core::dimension2df(20.f,20.f));			// max size

ps->setEmitter(em);		// this grabs the emitter
em->drop();				// so we can drop it here without deleting it

scene::IParticleAffector* paf = ps->createFadeOutParticleAffector();

ps->addAffector(paf);		// same goes for the affector
paf->drop();

ps->setPosition(core::vector3df(10,450,0));
ps->setScale(core::vector3df(100,100,100));
ps->setMaterialFlag(video::EMF_LIGHTING, false);
ps->setMaterialFlag(video::EMF_ZWRITE_ENABLE, false);
ps->setMaterialTexture(0, driver->getTexture("c:/x/b1.bmp"));
ps->setMaterialType(video::EMT_TRANSPARENT_VERTEX_ALPHA);

CREATE WATER (addWaterSurfaceSceneNode)

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IAnimatedMesh* plane = smgr->addHillPlaneMesh("floor", // Name of mesh
core::dimension2d<f32>(1,1), //   Size of a tile of the mesh.
core::dimension2d<u32>(100,100), //tileCount - Specifies how much tiles there will be. If you specifiy for example that a tile has the size (10.0f, 10.0f) and the tileCount is (10,10), than you get a field of 100 tiles which has the dimension 100.0fx100.0f.
0, //material
0, //hillheight
core::dimension2d<f32>(10,10), //countHills
core::dimension2d<f32>(100,100)); // texturerepeat

ISceneNode* sea = smgr->addWaterSurfaceSceneNode(plane->getMesh(0), 2.0f, 350.0f, 8.0f,0,-1,vector3df(0,0,0),vector3df(10,0,0),vector3df(1,1,1));
sea->setMaterialTexture(0, driver->getTexture("c:/x/sand.png"));
sea->setMaterialTexture(1, driver->getTexture("c:/x/water.png"));
sea->setMaterialFlag(EMF_LIGHTING, true);
sea->setMaterialType(video::EMT_REFLECTION_2_LAYER);

GET DISTANCE BETWEEN NODES (addWaterSurfaceSceneNode)

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ISceneNode* one;
ISceneNode* two;
one->getAbsolutePosition().getDistanceFrom(two->getAbsolutePosition());

NODE ANIMATION

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myNode->setFrameLoop(1,15);
myNode->setAnimationSpeed(25);

CREATE FOG

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driver->setFog(SColor(0,0, 0, 0),true, 150,220,0.01,false, false);
node->setMaterialFlag(video::EMF_FOG_ENABLE, true);

CREATE GUI ELEMENT

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irr::gui::IGUIEnvironment *ige=smgr->getGUIEnvironment();

irr::gui::IGUIMeshViewer * gm=ige->addMeshViewer(rect<s32>(0,0,100,100),0,-1,0);
scene::IAnimatedMesh * mesh=smgr->getMesh("c:/x/cube.x");
gm->setMesh(mesh);

irr::gui::IGUIEditBox * txt=ige->addEditBox(L"giorgi",core::rect<s32>(150,150,300,200),true,0,-1);

GET NODE AT SCREEN 2D POSITION №1

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scene::ISceneNode *node = smgr->getSceneCollisionManager()-> getSceneNodeFromScreenCoordinatesBB(position2d<s32>(mox,moy),0x1,false);

GET NODE AT SCREEN 2D POSITION №2

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core::line3d<f32> line;
line=smgr->getSceneCollisionManager()->getRayFromScreenCoordinates(position2d<s32>(mox,moy),cam);
scene::ISceneNode *nodeline = smgr->getSceneCollisionManager()->getSceneNodeFromRayBB(line,0x1,false);

GET NODE AT SCREEN 2D POSITION №3 (exact selection without bounding box)

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int idd=0;
int curid=0;
scene::ITriangleSelector * sel[100];

void gio::add()
{
	idd++;
scene::IAnimatedMesh * mesha=smgr->getMesh("c:/x/apple/apple.x");
	scene::IAnimatedMeshSceneNode *nd=smgr->addAnimatedMeshSceneNode(mesha,0,idd,core::vector3df(xx, yy, zz));
	sel[idd] = smgr->createOctTreeTriangleSelector(mesha, nd, 128);
	//If you wish to select animated node you can use:
	//sel[idd] = smgr->createTriangleSelectorFromBoundingBox(nd);
nd->setTriangleSelector(sel[idd]);
}
core::line3d<f32> line;
core::vector3df intersection;
core::triangle3df tri;
line=smgr->getSceneCollisionManager()->getRayFromScreenCoordinates(position2d<s32>(mox,moy),cam);

int k=0;
for(k=0; k<=idd; k++)
{
	if (smgr->getSceneCollisionManager()->getCollisionPoint(line, sel[k], intersection, tri))
	{
		curid=k;
		break;
	}
}
scene::IAnimatedMeshSceneNode *curnode=smgr->getSceneNodeFromId(curid);

SELECTOR - INTERSECTION POINT WITH 1) CAMERA VIEW - 2) MOUSE 2D COORDINATES

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scene::IAnimatedMesh	* ter = smgr->getMesh("c:/x/ter.3ds");
scene::ISceneNode		* ternode=smgr->addOctTreeSceneNode(ter,0);
ternode->setMaterialFlag(video::EMF_LIGHTING,false);

scene::ITriangleSelector * selector = smgr->createOctTreeTriangleSelector(ter, ternode, 128);
ternode->setTriangleSelector(selector);


IBillboardSceneNode * bill = smgr->addBillboardSceneNode();
bill->setMaterialType(EMT_TRANSPARENT_ADD_COLOR );
bill->setMaterialTexture(0, driver->getTexture("c:/x/b1.bmp"));
bill->setMaterialFlag(video::EMF_LIGHTING, false);
bill->setSize(dimension2d<f32>(10.0f, 10.0f)); 
bill->setPosition(vector3df(1.0f, 0.0f, 110.0f));


core::line3d<f32> line;

//1) Intersection with camera:
line.start = cam->getPosition();
line.end = line.start + (cam->getTarget() - line.start).normalize() * 1000.0f;

//2) intersection with mousecoordinates:
//line=smgr->getSceneCollisionManager()->getRayFromScreenCoordinates(position2d<s32>(mox,moy),cam);



core::vector3df intersection;
core::triangle3df tri;

if (smgr->getSceneCollisionManager()->getCollisionPoint(line, selector, intersection, tri))
{
	bill->setPosition(intersection);
}

[hybrid]

The set caption method is using a wrong approach with far too many low-level things. Just use "core::stringw caption(string1.c_str())" to create the wide char string from your std::string.
Also make sure that all your pragmas are encapsulated in "#ifdef MSC_VER ... #endif" to avoid warnings under other OS.
And the "basic variables" seem to suggest to use global variables. While this is done in the examples (for brevity of the code examples) it's not a good idea to suggest this as a general pattern.
Besides that, the code looks ok. Do you miss any of those hints in the examples, i.e. do you see a need to extend the examples set?

[geronika2004]

hybrid
Thank you for your comment.
Of course, if it is helpful I will extend examples set and will apply necessary correctings
[/quote]

[kryton9]

Thanks geronika2004, this is a great idea! I am pretty new to Irrlicht and this is such a great way to wrap ones head around all that is in irrlicht!

[randomMesh]

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void showCaptionVar(std::string txt)

Please use a constant reference for heaven's sake, e.g

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void showCaptionVar(const std::string& txt)

This will speed things up.

[stevebondy]

This is a great idea to help beginners like me. Please post more.
I could use some help with GUI stuff at the moment, particularly placing GUI elements (text and lines) over the rendered scene for HUD type effects.

[thiefbug]

this is more helpfully than the other tuts I've seen. thank you =D

[geronika2004]

I have added my new smart tutorials ,
Later I will add new things

[serengeor]

Great collection of code snippets
I will totally add some of them to my classes.
Thank You

Post some more of them