Added a texture animator to volume light in special effects example to show...

Added a texture animator to volume light in special effects example to show off how cool it can look, and better integrated it into the tutorial.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@1316 dfc29bdd-3216-0410-991c-e03cc46cb475

examples/08.SpecialFX/main.cpp

@@ -24,6 +24,7 @@ int main()
 	printf("Please press 'y' if you want to use realtime shadows.\n");
 
 	std::cin >> i;
+
 	bool shadows = (i == 'y');
 
 	// ask user for driver
@@ -191,6 +192,46 @@ int main()
 	ps->setMaterialTexture(0, driver->getTexture("../../media/fire.bmp"));
 	ps->setMaterialType(video::EMT_TRANSPARENT_VERTEX_ALPHA);
 
+	/* 
+	Next we add a volumetric light node, which adds a glowing fake area light to 
+	the scene. Like with the billboards and particle systems we also assign a 
+	texture for the desired effect, though this time we'll use a texture animator 
+	to create the illusion of a magical glowing area effect.
+	*/
+	scene::IVolumeLightSceneNode * n = smgr->addVolumeLightSceneNode(0, -1,
+							32, // Subdivisions on U axis
+							32, // Subdivisions on V axis
+							video::SColor(0, 255, 255, 255),  // foot color
+							video::SColor(0, 0, 0, 0)         // tail color
+							);
+	   
+	if (n) 
+	{
+		n->setScale(core::vector3df(56.0f, 56.0f, 56.0f));
+		n->setPosition(core::vector3df(-120,50,40));
+		
+		// load textures for animation
+		core::array<video::ITexture*> textures;
+		for (s32 g=7; g > 0; --g)
+		{
+			core::stringc tmp;
+			tmp = "../../media/portal";
+			tmp += g;
+			tmp += ".bmp";
+			video::ITexture* t = driver->getTexture( tmp.c_str () );
+			textures.push_back(t);
+		}
+
+		// create texture animator
+		scene::ISceneNodeAnimator *glow = smgr->createTextureAnimator(textures, 150);
+
+		// add the animator
+		n->addAnimator(glow);
+
+		// drop the animator because it was created with a create() function
+		glow->drop();
+	}
+
 	/*
 	As our last special effect, we want a dynamic shadow be casted from an animated
 	character. For this we load a DirectX .x model and place it into our world.
@@ -214,21 +255,6 @@ int main()
 	anode->setPosition(core::vector3df(-50,20,-60));
 	anode->setAnimationSpeed(15);
 
-	//volumetric lighting
-	scene::IVolumeLightSceneNode * n = smgr->addVolumeLightSceneNode(NULL, -1,
-							32, //Sub Divid U
-							32, //Sub Divid V
-							video::SColor(0, 180, 180, 180),  //foot colour
-							video::SColor(0, 0, 0, 0)         //tail colour
-							);
-	   
-	if (n) {
-		n->setScale(core::vector3df(56.0f, 56.0f, 56.0f));
-		n->setPosition(core::vector3df(-120,60,40));
-		video::SMaterial& mat = n->getMaterial(0);
-		mat.setTexture(0, smgr->getVideoDriver()->getTexture("../../media/lightFalloff.png"));
-	}
-
 	// add shadow
 	anode->addShadowVolumeSceneNode();
 	smgr->setShadowColor(video::SColor(150,0,0,0));