public void run()
{
/* At first, we let the user select the driver type,
* then start up the engine, set a caption, and get a
* pointer to the video driver.
*/
// ask user for driver
DriverType driverType;
// Ask user to select driver:
StringBuilder sb = new StringBuilder();
sb.Append("Please select the driver you want for this example:\n");
sb.Append("\n(a) Direct3D 9.0c\n(b) Direct3D 8.1\n(c) OpenGL 1.5");
sb.Append("\n(d) Software Renderer\n(e) Apfelbaum Software Renderer");
sb.Append("\n(f) Null Device\n(otherKey) exit\n\n");
// Get the user's input:
TextReader tIn = Console.In;
TextWriter tOut = Console.Out;
tOut.Write(sb.ToString());
string input = tIn.ReadLine();
// Select device based on user's input:
switch (input)
{
case "a":
driverType = DriverType.DIRECT3D9;
break;
case "b":
driverType = DriverType.DIRECT3D8;
break;
case "c":
driverType = DriverType.OPENGL;
break;
case "d":
driverType = DriverType.SOFTWARE;
break;
case "e":
driverType = DriverType.SOFTWARE2;
break;
case "f":
driverType = DriverType.NULL_DRIVER;
break;
default:
return;
}
// Create device and exit if creation fails:
device = new IrrlichtDevice(driverType, new Dimension2D(1024, 768), 32, false, true, true);
if (device == null)
{
tOut.Write("Device creation failed.");
return;
}
/*
* Get a pointer to the video driver and the SceneManager so that
* we do not always have to write device->getVideoDriver() and
* device->getSceneManager().
*/
ISceneManager smgr = device.SceneManager;
IVideoDriver driver = device.VideoDriver;
device.FileSystem.AddZipFileArchive(path + "map-20kdm2.pk3");
IAnimatedMesh q3levelmesh = smgr.GetMesh("20kdm2.bsp");
ISceneNode q3node = null;
if (q3levelmesh != null)
{
q3node = smgr.AddOctTreeSceneNode(q3levelmesh.GetMesh(0), null, 0);
}
/*So far so good, we've loaded the quake 3 level like in tutorial 2.
* Now, here comes something different: We create a triangle selector. A
* triangle selector is a class which can fetch the triangles from scene
* nodes for doing different things with them, for example collision
* detection. There are different triangle selectors, and all can be
* created with the ISceneManager. In this example, we create an
* OctTreeTriangleSelector, which optimizes the triangle output a little
* bit by reducing it like an octree. This is very useful for huge meshes
* like quake 3 levels.
* After we created the triangle selector, we attach it to the q3node.
* This is not necessary, but in this way, we do not need to care for the
* selector, for example dropping it after we do not need it anymore.*/
ITriangleSelector selector = null;
if (q3node != null)
{
q3node.Position = new Vector3D(-1370, -130, -1400);
selector = smgr.CreateOctTreeTriangleSelector(
q3levelmesh.GetMesh(0), q3node, 128);
// not implemented but not necessary
//q3node.TriangleSelector=selector;
}
/*We add a first person shooter camera to the scene for being able to move in
* the quake 3 level like in tutorial 2. But this, time, we add a special
* animator to the camera: A Collision Response animator. This thing modifies
* the scene node to which it is attached to in that way, that it may no
* more move through walls and is affected by gravity. The only thing we have
* to tell the animator is how the world looks like, how big the scene node is,
* how gravity and so on. After the collision response animator is attached to
* the camera, we do not have to do anything more for collision detection,
* anything is done automaticly, all other collision detection code below is
* for picking. And please note another cool feature: The collsion response
* animator can be attached also to all other scene nodes, not only to cameras.
* And it can be mixed with other scene node animators. In this way, collision
* detection and response in the Irrlicht engine is really, really easy.
* Now we'll take a closer look on the parameters of
* createCollisionResponseAnimator(). The first parameter is the TriangleSelector,
* which specifies how the world, against collision detection is done looks like.
* The second parameter is the scene node, which is the object, which is affected
* by collision detection, in our case it is the camera. The third defines how big
* the object is, it is the radius of an ellipsoid. Try it out and change the radius
* to smaller values, the camera will be able to move closer to walls after this.
* The next parameter is the direction and speed of gravity. You could set it to
* (0,0,0) to disable gravity. And the last value is just a translation: Without
* this, the ellipsoid with which collision detection is done would be around
* the camera, and the camera would be in the middle of the ellipsoid. But as
* human beings, we are used to have our eyes on top of the body, with which
* we collide with our world, not in the middle of it. So we place the scene
* node 50 units over the center of the ellipsoid with this parameter. And
* that's it, collision detection works now.
*/
ICameraSceneNode camera = smgr.AddCameraSceneNodeFPS(null, 100, 300, 0);
camera.Position = new Vector3D(-100, 50, -150);
ISceneNodeAnimator anim = smgr.CreateCollisionResponseAnimator(
selector, camera, new Vector3D(30, 50, 30),
new Vector3D(0, -3, 0), new Vector3D(0, 50, 0), 0);
camera.AddAnimator(anim);
/*Because collision detection is no big deal in irrlicht, I'll describe how
* to do two different types of picking in the next section. But before this,
* I'll prepare the scene a little. I need three animated characters which we
* could pick later, a dynamic light for lighting them, a billboard for drawing
* where we found an intersection, and, yes, I need to get rid of this mouse
* cursor. :)*/
//disable mouse cursor
device.CursorControl.Visible = false;
// add billboard
IBillboardSceneNode bill = smgr.AddBillboardSceneNode(
null, new Dimension2Df(20, 20), new Vector3D(), 0);
bill.SetMaterialType(MaterialType.TRANSPARENT_ADD_COLOR);
bill.SetMaterialTexture(0, driver.GetTexture(
path + "particle.bmp"));
bill.SetMaterialFlag(MaterialFlag.LIGHTING, false);
bill.SetMaterialFlag(MaterialFlag.ZBUFFER, false);
Material material = new Material();
material.Texture1 = driver.GetTexture(
path + "faerie2.bmp");
material.Lighting = true;
IAnimatedMeshSceneNode node = null;
IAnimatedMesh faerie = smgr.GetMesh(
path + "faerie.md2");
if (faerie != null)
{
node = smgr.AddAnimatedMeshSceneNode(faerie, null, 0);
node.Position = new Vector3D(-70, 0, -90);
node.SetMD2Animation(MD2AnimationType.RUN);
node.SetMaterial(0, material);
node = smgr.AddAnimatedMeshSceneNode(faerie, null, 0);
node.Position = new Vector3D(-70, 0, -30);
node.SetMD2Animation(MD2AnimationType.SALUTE);
node.SetMaterial(0, material);
node = smgr.AddAnimatedMeshSceneNode(faerie, null, 0);
node.Position = new Vector3D(-70, 0, -60);
node.SetMD2Animation(MD2AnimationType.JUMP);
node.SetMaterial(0, material);
}
material.Texture1 = null;
material.Lighting = false;
//Add a light
smgr.AddLightSceneNode(null, new Vector3D(-60, 100, 400),
new Colorf(1.0f, 1.0f, 1.0f, 1.0f), 600, 0);
/*For not making it too complicated, I'm doing picking inside the drawing
* loop. We take two pointers for storing the current and the last selected
* scene node and start the loop.*/
ISceneNode selectedSceneNode = null;
ISceneNode lastSelectedSceneNode = null;
int lastFPS = -1;
while (device.Run())
{
if (device.WindowActive)
{
device.VideoDriver.BeginScene(true, true, new Color(0, 200, 200, 200));
device.SceneManager.DrawAll();
/*After we've drawn the whole scene whit smgr->drawAll(), we'll do the
* first picking: We want to know which triangle of the world we are
* looking at. In addition, we want the exact point of the quake 3
* level we are looking at. For this, we create a 3d line starting at
* the position of the camera and going through the lookAt-target of it.
* Then we ask the collision manager if this line collides with a
* triangle of the world stored in the triangle selector. If yes, we draw
* the 3d triangle and set the position of the billboard to the intersection
* point.*/
Line3D line = new Line3D();
line.start = camera.Position;
line.end = line.start +
(camera.Target - line.start).Normalize() * 1000;
Vector3D intersection;
Triangle3D tri;
if (smgr.SceneCollisionManager.GetCollisionPoint(
line, selector, out intersection, out tri))
{
bill.Position = intersection;
driver.SetTransform(TransformationState.WORLD, new Matrix4());
driver.SetMaterial(material);
driver.Draw3DTriangle(tri, new Color(0, 255, 0, 0));
}
/*Another type of picking supported by the Irrlicht Engine is scene node
* picking based on bouding boxes. Every scene node has got a bounding box,
* and because of that, it's very fast for example to get the scene node
* which the camera looks at. Again, we ask the collision manager for this,
* and if we've got a scene node, we highlight it by disabling Lighting in
* its material, if it is not the billboard or the quake 3 level.*/
selectedSceneNode = smgr.SceneCollisionManager.
GetSceneNodeFromCameraBB(camera, 0);
if (lastSelectedSceneNode != null)
{
lastSelectedSceneNode.SetMaterialFlag(
MaterialFlag.LIGHTING, true);
}
if (selectedSceneNode == q3node ||
selectedSceneNode == bill)
{
selectedSceneNode = null;
}
if (selectedSceneNode != null)
{
selectedSceneNode.SetMaterialFlag(
MaterialFlag.LIGHTING, false);
}
lastSelectedSceneNode = selectedSceneNode;
/*That's it, we just have to finish drawing.*/
driver.EndScene();
int fps = device.VideoDriver.FPS;
if (lastFPS != fps)
{
device.WindowCaption = "Irrlicht Engine - Quake 3 Map example [" +
device.VideoDriver.Name + "] FPS:" + fps.ToString();
lastFPS = fps;
}
}
}
/*
* In the end, delete the Irrlicht device.
*/
// Instead of device->drop, we'll use:
GC.Collect();
}