how to add lights?

[radomiro]

hi,
in the first tutorial http://irrlicht.sourceforge.net/docu/example001.html
theres no lights right? (why not?, well ok)

here http://www.irrlicht3d.org/wiki/index.ph ... dMaterials
there is but im still getting this (see picture):


the relevant code is this:

Code: Select all

             IVideoDriver* driver = device->getVideoDriver();
        ISceneManager* smgr = device->getSceneManager();
        IGUIEnvironment* guienv = device->getGUIEnvironment();

	  	IAnimatedMesh* mesh = smgr->getMesh("../../media/rata.obj");

        if (!mesh) return 1;

        IAnimatedMeshSceneNode* node = smgr->addAnimatedMeshSceneNode( mesh );

		ILightSceneNode* light = smgr->addLightSceneNode( 0, core::vector3df(0,400,-200), video::SColorf(0.3f,0.3f,0.3f), 1.0f, 1 );

        node->setMaterialFlag(EMF_LIGHTING, true);

		smgr->addCameraSceneNode(0, vector3df(100,10,0), vector3df(0,0,0));

?¿?¿?¿ some help please.

[twilight17]

Are you loading a texture along with the model?

Is the light too far away?

Theres a lot of information (console output), etc that we would like

[Pumpkinpino]

Like stated above, I don't see any code applying a texture to your model unless you are just trying to see a gray untextured model to make sure the the lighting is working. A little more information on what you want the final product to look like would help.

-Greg

[radomiro]

there is no texture but I expected a flat shading at least (since I added a light) , and that is not flat shading. (I tried changing EMF_LIGHTING for EMF_LIGHTING_GOURAUD too without getting other than the shown above).
You can see the coords. for the light (I tried other positions too).

What I expected is something like this (3dsmax renders, in the gouraud case):

Or this in the flat shading case:

[Virion]

you have to apply texture.

[radomiro]

you have to apply texture.

ok, I'll try

[hybrid]

No, vertex colors would also do with most mesh formats. However, the normals have to be correct for proper lighting. And LIGHTING is very different from GOURAUD as long as we talk about the SMaterial properties. please read the API docs on those first.

[radomiro]

thanks, but if I was able to do the renders correctly in 3dsmax I guess the normals are right.
Ok, just tell me (please) if this is right or wrong:
(the sphere model is a 3ds generated with 3dsmax (standar sphere).

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createDevice( video::EDT_DIRECT3D9, dimension2d<s32>(800, 600), 16,
                        false, false, false, 0);

        if (!device)    return 1;

        device->setWindowCaption(L"Proyecto Zombie2.5D rata en Irrlicht test 1");

        IVideoDriver* driver = device->getVideoDriver();
        ISceneManager* smgr = device->getSceneManager();
        IGUIEnvironment* guienv = device->getGUIEnvironment();

	  	IAnimatedMesh* mesh = smgr->getMesh("../../media/sphere.3ds");

	
        if (!mesh) return 1;

        IAnimatedMeshSceneNode* node = smgr->addAnimatedMeshSceneNode( mesh );

    	node->setMaterialTexture( 0, driver->getTexture("../../media/text.bmp") );

		ILightSceneNode* light = smgr->addLightSceneNode( 0, core::vector3df(0,1500,0), video::SColorf(1.0f,1.0f,1.0f), 10.0f, 100 );

//smgr->setAmbientLight(video::SColorf(.5,.5,.5));

		light->setLightType(ELT_POINT);
		

       node->setMaterialFlag(EMF_LIGHTING, true);

		smgr->addCameraSceneNode(0, vector3df(-150,10,0), vector3df(0,0,0));

 while(device->run())
        {
				driver->beginScene(true, true, SColor(255,100,101,140));

                smgr->drawAll();

				guienv->drawAll();

                driver->endScene();
        }

and Im getting this:

[vitek]

Code: Select all

smgr->addAnimatedMeshSceneNode( mesh );

Assuming the sphere mesh you're using is the Irrlicht provided sphere mesh, you are creating a sphere model that it is going to be located at the world coordinate system origin.

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smgr->addLightSceneNode( 0, core::vector3df(0,1500,0), video::SColorf(1.0f,1.0f,1.0f), 10.0f, 100 ); 

Then you create a white point light that is 1500 units away from the origin, and has a radius of 10 units. Things that are more than 10 units away from the light will not be affected by this light.

Have you tried creating a light that is closer to the model, or at least has a radius that will allow it to affect meshes that are in the scene?

Travis

[radomiro]

Code: Select all

smgr->addAnimatedMeshSceneNode( mesh );

Assuming the sphere mesh you're using is the Irrlicht provided sphere mesh, you are creating a sphere model that it is going to be located at the world coordinate system origin.

Code: Select all

smgr->addLightSceneNode( 0, core::vector3df(0,1500,0), video::SColorf(1.0f,1.0f,1.0f), 10.0f, 100 ); 

Then you create a white point light that is 1500 units away from the origin, and has a radius of 10 units. Things that are more than 10 units away from the light will not be affected by this light.

Have you tried creating a light that is closer to the model, or at least has a radius that will allow it to affect meshes that are in the scene?

Travis

thanks, at last some light! (though flat, I'll check smoothing groups), good point about radious!





EDIT: That was, thanks.
Maybe the radious thing could be enphatized in the tutorial.