public Triangle3Df interpolateFrom2D(Vector2Di input)
{
//We can assume two things:
//That the hand will be considered in front of the object
//And that the hand will always be orbiting around the object
//So we calculate based off of sin and cos and relative positions
SceneCollisionManager collisionManager = device.SceneManager.SceneCollisionManager;
Line3Df ray = device.SceneManager.SceneCollisionManager.GetRayFromScreenCoordinates(input);
//calcLine.End = calcLine.End.Normalize();
//calcLine.End *= new Vector3Df(20);
// Tracks the current intersection point with the level or a mesh
Vector3Df intersection;
// Used to show with triangle has been hit
Triangle3Df hitTriangle;
SceneNode selectedSceneNode =
device.SceneManager.SceneCollisionManager.GetSceneNodeAndCollisionPointFromRay(
ray,
out intersection, // This will be the position of the collision
out hitTriangle); // This ensures that only nodes that we have set up to be pickable are considered
SceneNode highlightedSceneNode = null;
// If the ray hit anything, move the billboard to the collision position
// and draw the triangle that was hit.
if (selectedSceneNode != null)
{
//bill.Position = new Vector3Df(intersection);
// We need to reset the transform before doing our own rendering.
device.VideoDriver.SetTransform(TransformationState.World, new Matrix());
//device.VideoDriver.SetMaterial(material);
device.VideoDriver.Draw3DTriangle(hitTriangle, new Color(255, 255, 0, 0));
// We can check the flags for the scene node that was hit to see if it should be
// highlighted. The animated nodes can be highlighted, but not the Quake level mesh
highlightedSceneNode = selectedSceneNode;
// Highlighting in this case means turning lighting OFF for this node,
// which means that it will be drawn with full brightness.
//highlightedSceneNode.SetMaterialFlag(MaterialFlag.Lighting, false);
}
return(hitTriangle);
}
static void Main()
{
DriverType?driverType = AskForDriver();
if (!driverType.HasValue)
{
return;
}
IrrlichtDevice device = IrrlichtDevice.CreateDevice(driverType.Value, new Dimension2Di(640, 480));
if (device == null)
{
return;
}
VideoDriver driver = device.VideoDriver;
SceneManager smgr = device.SceneManager;
device.FileSystem.AddFileArchive("../../media/map-20kdm2.pk3");
AnimatedMesh q3levelmesh = smgr.GetMesh("20kdm2.bsp");
MeshSceneNode q3node = null;
// The Quake mesh is pickable, but doesn't get highlighted.
if (q3levelmesh != null)
{
q3node = smgr.AddOctreeSceneNode(q3levelmesh.GetMesh(0), null, IDFlag_IsPickable);
}
TriangleSelector selector = null;
if (q3node != null)
{
q3node.Position = new Vector3Df(-1350, -130, -1400);
selector = smgr.CreateOctreeTriangleSelector(q3node.Mesh, q3node, 128);
q3node.TriangleSelector = selector;
// We're not done with this selector yet, so don't drop it.
}
// Set a jump speed of 3 units per second, which gives a fairly realistic jump
// when used with the gravity of (0, -1000, 0) in the collision response animator.
CameraSceneNode camera = smgr.AddCameraSceneNodeFPS(null, 100.0f, 0.3f, ID_IsNotPickable, null, true, 3.0f);
camera.Position = new Vector3Df(50, 50, -60);
camera.Target = new Vector3Df(-70, 30, -60);
if (selector != null)
{
SceneNodeAnimator anim = smgr.CreateCollisionResponseAnimator(
selector,
camera,
new Vector3Df(30, 50, 30),
new Vector3Df(0, -1000, 0),
new Vector3Df(0, 30, 0));
selector.Drop(); // As soon as we're done with the selector, drop it.
camera.AddAnimator(anim);
anim.Drop(); // And likewise, drop the animator when we're done referring to it.
}
// Now I create three animated characters which we can pick, a dynamic light for
// lighting them, and a billboard for drawing where we found an intersection.
// First, let's get rid of the mouse cursor. We'll use a billboard to show what we're looking at.
device.CursorControl.Visible = false;
// Add the billboard.
BillboardSceneNode bill = smgr.AddBillboardSceneNode();
bill.SetMaterialType(MaterialType.TransparentAddColor);
bill.SetMaterialTexture(0, driver.GetTexture("../../media/particle.bmp"));
bill.SetMaterialFlag(MaterialFlag.Lighting, false);
bill.SetMaterialFlag(MaterialFlag.ZBuffer, false);
bill.SetSize(20, 20, 20);
bill.ID = ID_IsNotPickable; // This ensures that we don't accidentally ray-pick it
AnimatedMeshSceneNode node = null;
// Add an MD2 node, which uses vertex-based animation.
node = smgr.AddAnimatedMeshSceneNode(smgr.GetMesh("../../media/faerie.md2"), null, IDFlag_IsPickable | IDFlag_IsHighlightable);
node.Position = new Vector3Df(-90, -15, -140); // Put its feet on the floor.
node.Scale = new Vector3Df(1.6f); // Make it appear realistically scaled
node.SetMD2Animation(AnimationTypeMD2.Point);
node.AnimationSpeed = 20.0f;
node.GetMaterial(0).SetTexture(0, driver.GetTexture("../../media/faerie2.bmp"));
node.GetMaterial(0).Lighting = true;
node.GetMaterial(0).NormalizeNormals = true;
// Now create a triangle selector for it. The selector will know that it
// is associated with an animated node, and will update itself as necessary.
selector = smgr.CreateTriangleSelector(node);
node.TriangleSelector = selector;
selector.Drop(); // We're done with this selector, so drop it now.
// And this B3D file uses skinned skeletal animation.
node = smgr.AddAnimatedMeshSceneNode(smgr.GetMesh("../../media/ninja.b3d"), null, IDFlag_IsPickable | IDFlag_IsHighlightable);
node.Scale = new Vector3Df(10);
node.Position = new Vector3Df(-75, -66, -80);
node.Rotation = new Vector3Df(0, 90, 0);
node.AnimationSpeed = 8.0f;
node.GetMaterial(0).NormalizeNormals = true;
// Just do the same as we did above.
selector = smgr.CreateTriangleSelector(node);
node.TriangleSelector = selector;
selector.Drop();
// This X files uses skeletal animation, but without skinning.
node = smgr.AddAnimatedMeshSceneNode(smgr.GetMesh("../../media/dwarf.x"), null, IDFlag_IsPickable | IDFlag_IsHighlightable);
node.Position = new Vector3Df(-70, -66, -30); // Put its feet on the floor.
node.Rotation = new Vector3Df(0, -90, 0); // And turn it towards the camera.
node.AnimationSpeed = 20.0f;
selector = smgr.CreateTriangleSelector(node);
node.TriangleSelector = selector;
selector.Drop();
// And this mdl file uses skinned skeletal animation.
node = smgr.AddAnimatedMeshSceneNode(smgr.GetMesh("../../media/yodan.mdl"), null, IDFlag_IsPickable | IDFlag_IsHighlightable);
node.Position = new Vector3Df(-90, -25, 20);
node.Scale = new Vector3Df(0.8f);
node.GetMaterial(0).Lighting = true;
node.AnimationSpeed = 20.0f;
// Just do the same as we did above.
selector = smgr.CreateTriangleSelector(node);
node.TriangleSelector = selector;
selector.Drop();
// Add a light, so that the unselected nodes aren't completely dark.
LightSceneNode light = smgr.AddLightSceneNode(null, new Vector3Df(-60, 100, 400), new Colorf(1.0f, 1.0f, 1.0f), 600.0f);
light.ID = ID_IsNotPickable; // Make it an invalid target for selection.
// Remember which scene node is highlighted
SceneNode highlightedSceneNode = null;
SceneCollisionManager collMan = smgr.SceneCollisionManager;
int lastFPS = -1;
// draw the selection triangle only as wireframe
Material material = new Material();
material.Lighting = false;
material.Wireframe = true;
while (device.Run())
{
if (device.WindowActive)
{
driver.BeginScene(ClearBufferFlag.All, new Color(0));
smgr.DrawAll();
// Unlight any currently highlighted scene node
if (highlightedSceneNode != null)
{
highlightedSceneNode.SetMaterialFlag(MaterialFlag.Lighting, true);
highlightedSceneNode = null;
}
// All intersections in this example are done with a ray cast out from the camera to
// a distance of 1000. You can easily modify this to check (e.g.) a bullet
// trajectory or a sword's position, or create a ray from a mouse click position using
// collMan.GetRayFromScreenCoordinates()
Line3Df ray = new Line3Df();
ray.Start = camera.Position;
ray.End = ray.Start + (camera.Target - ray.Start).Normalize() * 1000.0f;
// This call is all you need to perform ray/triangle collision on every scene node
// that has a triangle selector, including the Quake level mesh. It finds the nearest
// collision point/triangle, and returns the scene node containing that point.
// Irrlicht provides other types of selection, including ray/triangle selector,
// ray/box and ellipse/triangle selector, plus associated helpers.
// See the methods of ISceneCollisionManager
SceneNode selectedSceneNode =
collMan.GetSceneNodeAndCollisionPointFromRay(
ray,
out Vector3Df intersection, // This will be the position of the collision
out Triangle3Df hitTriangle, // This will be the triangle hit in the collision
IDFlag_IsPickable); // This ensures that only nodes that we have set up to be pickable are considered
// If the ray hit anything, move the billboard to the collision position
// and draw the triangle that was hit.
if (selectedSceneNode != null)
{
bill.Position = intersection;
// We need to reset the transform before doing our own rendering.
driver.SetTransform(TransformationState.World, Matrix.Identity);
driver.SetMaterial(material);
driver.Draw3DTriangle(hitTriangle, new Color(255, 0, 0));
// We can check the flags for the scene node that was hit to see if it should be
// highlighted. The animated nodes can be highlighted, but not the Quake level mesh
if ((selectedSceneNode.ID & IDFlag_IsHighlightable) == IDFlag_IsHighlightable)
{
highlightedSceneNode = selectedSceneNode;
// Highlighting in this case means turning lighting OFF for this node,
// which means that it will be drawn with full brightness.
highlightedSceneNode.SetMaterialFlag(MaterialFlag.Lighting, false);
}
}
// We're all done drawing, so end the scene.
driver.EndScene();
int fps = driver.FPS;
if (lastFPS != fps)
{
device.SetWindowCaption(String.Format(
"Collision detection example - Irrlicht Engine [{0}] fps: {1}",
driver.Name, fps));
lastFPS = fps;
}
}
}
device.Drop();
}
