I don't kow how to set light and material effect, ::::::(

wuallen · Post by **wuallen** » Mon Jul 28, 2008 3:24 am

The first one is my program, the PINs in the scene look very dark. But the PINs in the second picture is very good.

I just copy some code from someone's demo. I can't figure out why I can't see any vertex lighted in my program.

I don't know how to get the good effect. Can someboy expain some detail stuff of the light and material in irrlicht?

Code: Select all


int main()
{
	IrrlichtDevice *device = createDevice(video::EDT_DIRECT3D9, core::dimension2d<s32>(640, 480));

	if (device == 0)
		return 1; // could not create selected driver.

	video::IVideoDriver* driver = device->getVideoDriver();
	scene::ISceneManager* smgr = device->getSceneManager();

	device->getFileSystem()->addZipFileArchive("../../media/map-20kdm2.pk3");

	scene::IAnimatedMesh* mesh = smgr->getMesh("20kdm2.bsp");
	scene::ISceneNode* node = 0;
	
	if (mesh)
		node = smgr->addOctTreeSceneNode(mesh->getMesh(0), 0, -1, 128);

	if (node)
		node->setPosition(core::vector3df(-1350,-130,-1400));

	// add pins
	scene::IAnimatedMesh* aPinMesh = smgr->getMesh("../../media/pin.x");

	core::vector3df aGroupPos(0,-53,0);
	for (int i = 0; i < 5; i++)
	{
		for (int j = 0; j < i; j++)
		{
			scene::ISceneNode* aPinSceneNode = smgr->addMeshSceneNode(aPinMesh->getMesh(0));
			aPinSceneNode->setScale(core::vector3df(10, 10, 10));
			aPinSceneNode->setRotation(core::vector3df(0, 0, 0));
			aPinSceneNode->setPosition(aGroupPos + core::vector3df(-j*12.0f, -0, 0.0f + i*12.0f));
			aPinSceneNode->setMaterialType(video::EMT_SOLID);
			//aPinSceneNode->setMaterialFlag(video::EMF_LIGHTING, false);
		} 
	}


	scene::ICameraSceneNode* iCameraSceneNode = smgr->addCameraSceneNodeFPS();
	iCameraSceneNode->setRotation(core::vector3df(20.833364f, -14.875068f, 0.000000f));
	iCameraSceneNode->setPosition(core::vector3df(53.800972f, 23.301916f, -174.089157f));

	// add light
	smgr->addLightSceneNode(node, core::vector3df(0, 200, 0));

	device->getCursorControl()->setVisible(false);

	int lastFPS = -1;

	while(device->run())
	if (device->isWindowActive())
	{
		driver->beginScene(true, true, video::SColor(0,200,200,200));
		smgr->drawAll();
		driver->endScene();

		int fps = driver->getFPS();

		if (lastFPS != fps)
		{
			core::stringw str = L"Irrlicht Engine - Quake 3 Map example [";
			str += driver->getName();
			str += "] FPS:";
			str += fps;

			device->setWindowCaption(str.c_str());
			lastFPS = fps;
		}
	}

	device->drop();
	return 0;
}

jontan6 · Post by **jontan6** » Mon Jul 28, 2008 3:36 am

your 20kdm2.bsp room is lighted using lightmap, and not affected by the light you created. the pin.x is being lighted by the dynamic light you created.

wuallen · Post by **wuallen** » Mon Jul 28, 2008 7:38 am

jontan6 wrote:your 20kdm2.bsp room is lighted using lightmap, and not affected by the light you created. the pin.x is being lighted by the dynamic light you created.

There are also some PINs in the first picture, but they are too dark to see clearly.

the first picture is the result of my code, and the second picture is from someone's demo. I just use the same code with demo. But in my result picture, the PIN is not lighted, at least I don't see any vertex is lighted.

I just want my code can produce the same effect with the second picture.

torleif · Post by **torleif** » Mon Jul 28, 2008 8:13 am

aPinSceneNode->setMaterialFlag(video::EMF_LIGHTING, true);

If your pins have normals stored in them correctly

wuallen · Post by **wuallen** » Mon Jul 28, 2008 8:18 am

torleif wrote:aPinSceneNode->setMaterialFlag(video::EMF_LIGHTING, true);

If your pins have normals stored in them correctly

I have set this flag true, but it didn't work.

In my memory, I haven't ever see the light effect in irrlicht until I see the demo.

Acki · Post by **Acki** » Mon Jul 28, 2008 12:43 pm

maybe your light is just too far away ???
I see you create the light like this:

Code: Select all

   // add light
   smgr->addLightSceneNode(node, core::vector3df(0, 200, 0));

why did you set the map as parent to the light ???

try to make the radius larger or position the light closer to the pins:

Code: Select all

   // set the radius to 400
   smgr->addLightSceneNode(node, core::vector3df(0, 200, 0), video::SColorf(1.0f, 1.0f, 1.0f), 400); 

   // or move the light closer to the pins
   smgr->addLightSceneNode(0, core::vector3df(0, 100, 0));

EDIT: ok, I made a small test with your code and you should create the light like this:

Code: Select all

smgr->addLightSceneNode(0, core::vector3df(0, 10, 0));

and for testings it's always a good idea to attach a billboard to the light, so you can see where the light actually is placed in space...

wuallen · Post by **wuallen** » Mon Jul 28, 2008 2:54 pm

hello acki, thank your test. I get a small step forward. I change the addLightSceneNode's argument, and use a md2 model, then I can see the lighting effect. But I still can't see the lighting effect on PIN model. I think the specific point is that it is a MeshSceneNode.

Can you get lighting effect from MeshSceneNode?

Code: Select all

int main()
{
	IrrlichtDevice *device = createDevice(video::EDT_DIRECT3D9, core::dimension2d<s32>(640, 480));

	if (device == 0)
		return 1; // could not create selected driver.

	video::IVideoDriver* driver = device->getVideoDriver();
	scene::ISceneManager* smgr = device->getSceneManager();

	device->getFileSystem()->addZipFileArchive("../../media/map-20kdm2.pk3");

	scene::IAnimatedMesh* mesh = smgr->getMesh("20kdm2.bsp");
	scene::ISceneNode* node = 0;
	
	if (mesh)
		node = smgr->addOctTreeSceneNode(mesh->getMesh(0), 0, -1, 128);

	if (node)
		node->setPosition(core::vector3df(-1350,-130,-1400));

	
	// add pins
	
	scene::IAnimatedMesh* aPinMesh = smgr->getMesh("../../media/pin.x");

	core::vector3df aGroupPos(20,-30,0);
	for (int i = 0; i < 2; i++)
	{
		for (int j = 0; j < i; j++)
		{
			scene::ISceneNode* aPinSceneNode = smgr->addMeshSceneNode(aPinMesh->getMesh(0));
			aPinSceneNode->setScale(core::vector3df(30, 30, 30));
			aPinSceneNode->setRotation(core::vector3df(0, 0, 0));
			aPinSceneNode->setPosition(aGroupPos + core::vector3df(-j*12.0f, -0, 0.0f + i*12.0f));
			aPinSceneNode->setMaterialType(video::EMT_SOLID);
			aPinSceneNode->setMaterialFlag(video::EMF_LIGHTING, true);
		} 
	}
	

	video::SMaterial material;
	material.setTexture(0, driver->getTexture("../../media/faerie2.bmp"));
	material.Lighting = true;

	scene::IAnimatedMeshSceneNode* fnode = 0;
	scene::IAnimatedMesh* faerie = smgr->getMesh("../../media/faerie.md2");

	if (faerie)
	{
		fnode = smgr->addAnimatedMeshSceneNode(faerie);
		fnode->setPosition(core::vector3df(-20,-30,12));
		fnode->setMD2Animation(scene::EMAT_RUN);
		fnode->getMaterial(0) = material;
	}

	scene::ICameraSceneNode* iCameraSceneNode = smgr->addCameraSceneNodeFPS();
	iCameraSceneNode->setRotation(core::vector3df(20.833364f, -14.875068f, 0.000000f));
	iCameraSceneNode->setPosition(core::vector3df(53.800972f, 23.301916f, -174.089157f));

	// add light
	scene::ILightSceneNode* light = smgr->addLightSceneNode(0, 
															core::vector3df(0, 30, 0), 
															video::SColorf(1.0f, 1.0f, 1.0f), 
															600);

	scene::IBillboardSceneNode * bill = smgr->addBillboardSceneNode(light);
	bill->setMaterialType(video::EMT_TRANSPARENT_ADD_COLOR );
	bill->setMaterialTexture(0, driver->getTexture("../../media/particle.bmp"));
	bill->setMaterialFlag(video::EMF_LIGHTING, false);
	bill->setMaterialFlag(video::EMF_ZBUFFER, false);
	bill->setSize(core::dimension2d<f32>(20.0f, 20.0f));
	device->getCursorControl()->setVisible(false);

	int lastFPS = -1;

	while(device->run())
	if (device->isWindowActive())
	{
		driver->beginScene(true, true, video::SColor(0,200,200,200));
		smgr->drawAll();
		driver->endScene();

		int fps = driver->getFPS();

		if (lastFPS != fps)
		{
			core::stringw str = L"Irrlicht Engine - Quake 3 Map example [";
			str += driver->getName();
			str += "] FPS:";
			str += fps;

			device->setWindowCaption(str.c_str());
			lastFPS = fps;
		}
	}

	device->drop();
	return 0;
}

I also post the pin.x file.

----------------------------------------
xof 0303txt 0032

// DirectX - from MilkShape3D

Frame pinFrame
{
FrameTransformMatrix
{
1.000000,0.000000,0.000000,0.000000,
0.000000,1.000000,0.000000,0.000000,
0.000000,0.000000,1.000000,0.000000,
0.000000,0.000000,0.000000,1.000000;;
}

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0.228114;1.309533;0.000000;,
0.162447;1.309533;-0.158534;,
0.272009;1.692469;0.000000;,
0.190938;1.692469;-0.195722;,
0.110788;1.872034;-0.115572;,
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-----------------------------------------

hybrid · Post by **hybrid** » Mon Jul 28, 2008 2:57 pm

Maybe the normals are broken? This leads to no visual artifacts, except when lighting is applied. Please check this in the model viewer (in the menu you can enable normals visibility)

wuallen · Post by **wuallen** » Mon Jul 28, 2008 3:46 pm

I use milkshape reload this model, and export to a b3d model. But the model still can't show the effect of light.

I tested animatedSceneNode, and it is ok. but MeshSceneNode failed. why?

hybrid · Post by **hybrid** » Mon Jul 28, 2008 4:59 pm

You have to enable EMF_NORMALIZE_NORMALS, because you scale the meshes. This also scales the normals, which leads to broken normals. You could also scale the static mesh once, using the mesh manipulator, and use that scaled mesh with the mesh scene node.

wuallen · Post by **wuallen** » Tue Jul 29, 2008 2:16 am

thank acki and hybrid:

you both pointed out my fault in code, now it works well.
I searched old posts, and already are there some body get same problem. It is very nice to see irrlicht grown up a big segment.

not need recalculateBoundingBox. if you run recalculateBoundingBox(), there a segment fault.

Code: Select all

	scene::IAnimatedMesh* aPinMesh = smgr->getMesh("../../media/pin.b3d");
	scene::IMeshManipulator *man = smgr->getMeshManipulator();
	scene::IMesh* pm = aPinMesh->getMesh(0);
	man->scaleMesh(pm, core::vector3df(15, 15, 15));
	//((scene::SAnimatedMesh*)pm)->recalculateBoundingBox(); 
	//man->recalculateNormals(pm);

	core::vector3df aGroupPos(20,-30,0);
	for (int i = 0; i < 2; i++)
	{
		for (int j = 0; j < i; j++)
		{
			scene::ISceneNode* aPinSceneNode = smgr->addMeshSceneNode(pm);
			aPinSceneNode->setRotation(core::vector3df(0, 0, 0));
			aPinSceneNode->setPosition(aGroupPos + core::vector3df(-j*12.0f, -0, 0.0f + i*12.0f));
			aPinSceneNode->setMaterialType(video::EMT_SOLID);
			aPinSceneNode->setMaterialFlag(video::EMF_LIGHTING, true);
			//aPinSceneNode->setMaterialFlag(video::EMF_NORMALIZE_NORMALS, true);
			//aPinSceneNode->setScale(core::vector3df(15, 15, 15));
		} 
	}

hybrid · Post by **hybrid** » Tue Jul 29, 2008 10:56 am

With latest SVN you shouldn't need to recalculate the bbox, that's fixed now. However, if you still need to, you should cast to an SMesh instead of an SAnimatedMesh, because that's what you have here!