public OcclusionCullingScreen(IServiceLocator services)
: base(services)
{
_sceneNodes = new List<SceneNode>();
// Create new occlusion buffer with default settings.
OcclusionBuffer = new OcclusionBuffer(GraphicsService);
OcclusionBuffer.ProgressiveShadowCasterCulling = true;
EnableCulling = true;
// Create a second camera for rendering a top-down view of the scene.
var topDownPerspective = new PerspectiveProjection();
topDownPerspective.SetFieldOfView(MathHelper.ToRadians(90), 1, 1, 512);
_topDownCameraNode = new CameraNode(new Camera(topDownPerspective));
_topDownCameraNode.PoseWorld = new Pose(new Vector3F(-10, 120, -10));
_topDownCameraNode.LookAt(new Vector3F(-10, 0, -10), Vector3F.UnitZ);
_sceneQuery = new CustomSceneQuery();
_debugRenderer = new DebugRenderer(GraphicsService, null);
// The DigitalRune Profiler is used to measure execution times.
Profiler.SetFormat("Occlusion.Render", 1e3f, "[ms]");
Profiler.SetFormat("Occlusion.Query", 1e3f, "[ms]");
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="PlanarReflectionNode" /> class.
/// </summary>
/// <param name="renderToTexture">The render texture target.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="renderToTexture"/> is <see langword="null"/>.
/// </exception>
public PlanarReflectionNode(RenderToTexture renderToTexture)
: base(renderToTexture)
{
CameraNode = new CameraNode(new Camera(new PerspectiveProjection()));
FieldOfViewScale = 1;
_normalLocal = new Vector3F(0, 0, 1);
}
public MyGraphicsScreen(IGraphicsService graphicsService)
: base(graphicsService)
{
_meshRenderer = new MeshRenderer();
var contentManager = ServiceLocator.Current.GetInstance<ContentManager>();
var spriteFont = contentManager.Load<SpriteFont>("SpriteFont1");
_debugRenderer = new DebugRenderer(graphicsService, spriteFont);
Scene = new Scene();
// Add a camera with a perspective projection.
var projection = new PerspectiveProjection();
projection.SetFieldOfView(
ConstantsF.PiOver4,
graphicsService.GraphicsDevice.Viewport.AspectRatio,
0.1f,
100.0f);
CameraNode = new CameraNode(new Camera(projection))
{
Name = "CameraPerspective",
PoseWorld = Pose.FromMatrix(Matrix44F.CreateLookAt(new Vector3F(10, 5, 10), new Vector3F(0, 1, 0), new Vector3F(0, 1, 0)).Inverse),
};
Scene.Children.Add(CameraNode);
}
/// <overloads>
/// <summary>
/// Gets a scissor rectangle that encloses the specified object.
/// </summary>
/// </overloads>
///
/// <summary>
/// Gets a scissor rectangle that encloses the specified sphere.
/// </summary>
/// <param name="cameraNode">The camera node.</param>
/// <param name="viewport">The viewport.</param>
/// <param name="positionWorld">The sphere center in world space.</param>
/// <param name="radius">The sphere radius.</param>
/// <returns>The scissor rectangle.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="cameraNode"/> is <see langword="null"/>.
/// </exception>
public static Rectangle GetScissorRectangle(CameraNode cameraNode, Viewport viewport, Vector3F positionWorld, float radius)
{
var rectangle = GetViewportRectangle(cameraNode, viewport, positionWorld, radius);
rectangle.X += viewport.X;
rectangle.Y += viewport.Y;
return rectangle;
}
/// <summary>
/// Gets a scissor rectangle that encloses the specified geometric object.
/// </summary>
/// <param name="cameraNode">The camera node.</param>
/// <param name="viewport">The viewport.</param>
/// <param name="geometricObject">The geometric object.</param>
/// <returns>The scissor rectangle.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="cameraNode"/> or <paramref name="geometricObject"/> is
/// <see langword="null"/>.
/// </exception>
public static Rectangle GetScissorRectangle(CameraNode cameraNode, Viewport viewport, IGeometricObject geometricObject)
{
var rectangle = GetViewportRectangle(cameraNode, viewport, geometricObject);
rectangle.X += viewport.X;
rectangle.Y += viewport.Y;
return rectangle;
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="CubeMapShadowMapRenderer"/> class.
/// </summary>
/// <param name="renderCallback">
/// The method which renders the scene into the shadow map. Must not be <see langword="null"/>.
/// See <see cref="RenderCallback"/> for more information.
/// </param>
public CubeMapShadowMapRenderer(Func<RenderContext, bool> renderCallback)
{
if (renderCallback == null)
throw new ArgumentNullException("renderCallback");
RenderCallback = renderCallback;
_perspectiveCameraNode = new CameraNode(new Camera(new PerspectiveProjection()));
}
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="CascadedShadowMapRenderer"/> class.
/// </summary>
/// <param name="renderCallback">
/// The method which renders the scene into the shadow map. Must not be <see langword="null"/>.
/// See <see cref="RenderCallback"/> for more information.
/// </param>
public CascadedShadowMapRenderer(Func<RenderContext, bool> renderCallback)
{
if (renderCallback == null)
throw new ArgumentNullException("renderCallback");
RenderCallback = renderCallback;
_splitVolume = new PerspectiveViewVolume();
_orthographicCameraNode = new CameraNode(new Camera(new OrthographicProjection()));
}
public CharacterControllerSample(Microsoft.Xna.Framework.Game game)
: base(game)
{
SampleFramework.IsMouseVisible = false;
GraphicsScreen.ClearBackground = true;
GraphicsScreen.BackgroundColor = Color.CornflowerBlue;
// Create a camera.
var projection = new PerspectiveProjection();
projection.SetFieldOfView(
ConstantsF.PiOver4,
GraphicsService.GraphicsDevice.Viewport.AspectRatio,
0.1f,
1000.0f);
_cameraNode = new CameraNode(new Camera(projection));
GraphicsScreen.CameraNode = _cameraNode;
// We use one collision domain that computes collision info for all game objects.
_domain = new CollisionDomain(new CollisionDetection());
// Create collision objects for a test level.
CharacterControllerLevel.Load(_domain);
// Add collision filter:
// The _domain contains a lot of collision objects for obstacles in the level.
// We do not need to compute contacts between these static obstacles. To avoid
// this, the CharacterControllerLevel puts all level collision objects into
// the collision group 1. We add a broad phase collision filter which filters out
// collision checks between objects of collision group 1.
_domain.BroadPhase.Filter = new DelegatePairFilter<CollisionObject>(
pair =>
{
if (pair.First.CollisionGroup == 1 && pair.Second.CollisionGroup == 1)
return false;
return true;
});
// Create character controller.
_character = new CharacterController(_domain);
_character.Position = new Vector3F(0, 0, 1);
// Create the trigger volume.
_triggerVolume = new CollisionObject(
new GeometricObject(new SphereShape(3), new Pose(new Vector3F(-5, 0, 5))))
{
// We do not want to compute detailed contact information (contact points, contact
// normal vectors, etc.). We are only interested if the object touches another object or not.
// Therefore, we set the collision object type to "trigger". Trigger objects are better for
// performance than normal collision objects. Additionally, the character controller should
// be able to walk through the trigger volume. The character controller treats objects as
// solids if it finds contact information (contact positions with contact normal vectors).
Type = CollisionObjectType.Trigger
};
_domain.CollisionObjects.Add(_triggerVolume);
}
public SampleGraphicsScreen(IServiceLocator services)
: base(services.GetInstance<IGraphicsService>())
{
_sampleFramework = services.GetInstance<SampleFramework>();
Name = "SampleScreen";
ClearBackground = false;
BackgroundColor = new Color(220, 220, 220);
DrawReticle = false;
UseFixedWidthFont = false;
// Use 2D texture for reticle.
var contentManager = services.GetInstance<ContentManager>();
_reticle = contentManager.Load<Texture2D>("Reticle");
// Get the sprite fonts used in the UI theme.
var uiContentManager = services.GetInstance<ContentManager>("UIContent");
_defaultFont = uiContentManager.Load<SpriteFont>("UI Themes/BlendBlue/Default");
_fixedWidthFont = uiContentManager.Load<SpriteFont>("UI Themes/BlendBlue/Console");
// Set up 2D camera such that (0, 0) is upper, left corner of screen and
// (screenWidth, screenHeight) is lower, right corner of screen.
var graphicsDevice = GraphicsService.GraphicsDevice;
int screenWidth = graphicsDevice.PresentationParameters.BackBufferWidth;
int screenHeight = graphicsDevice.PresentationParameters.BackBufferHeight;
var projection = new OrthographicProjection
{
Near = 0, Far = 2000,
Left = 0, Right = screenWidth,
Top = 0, Bottom = screenHeight,
};
var camera = new Camera(projection);
_cameraNode2D = new CameraNode(camera)
{
PoseWorld = new Pose(new Vector3F(0, 0, 1000)),
};
// Initialize renderers.
_spriteBatch = new SpriteBatch(graphicsDevice);
_meshRenderer = new MeshRenderer();
_billboardRenderer = new BillboardRenderer(GraphicsService, 2048);
DebugRenderer2D = new DebugRenderer(GraphicsService, _defaultFont)
{
SpriteFont = _defaultFont,
DefaultColor = new Color(0, 0, 0),
DefaultTextPosition = new Vector2F(10)
};
DebugRenderer = new DebugRenderer(GraphicsService, _defaultFont)
{
SpriteFont = _defaultFont,
DefaultColor = new Color(0, 0, 0),
DefaultTextPosition = new Vector2F(10)
};
Scene = new Scene();
}
public void GetScreenSizeWithOrthographic()
{
// Camera
var projection = new OrthographicProjection();
projection.SetOffCenter(0, 4, 0, 2);
var camera = new Camera(projection);
var cameraNode = new CameraNode(camera);
cameraNode.PoseWorld = new Pose(new Vector3F(123, 456, -789), Matrix33F.CreateRotation(new Vector3F(1, -2, 3), MathHelper.ToRadians(75)));
// 2:1 viewport
var viewport = new Viewport(10, 10, 200, 100);
// Test object
var shape = new SphereShape();
var geometricObject = new GeometricObject(shape);
// Empty sphere at camera position.
shape.Radius = 0;
geometricObject.Pose = cameraNode.PoseWorld;
Vector2F screenSize = GraphicsHelper.GetScreenSize(cameraNode, viewport, geometricObject);
Assert.AreEqual(0, screenSize.X);
Assert.AreEqual(0, screenSize.Y);
// Empty sphere centered at near plane.
shape.Radius = 0;
geometricObject.Pose = cameraNode.PoseWorld * new Pose(new Vector3F(0.123f, -0.543f, -1));
screenSize = GraphicsHelper.GetScreenSize(cameraNode, viewport, geometricObject);
Assert.AreEqual(0, screenSize.X);
Assert.AreEqual(0, screenSize.Y);
// Create sphere which as a bounding sphere of ~1 unit diameter:
// Since the bounding sphere is based on the AABB, we need to make the
// actual sphere a bit smaller.
shape.Radius = 1 / (2 * (float)Math.Sqrt(3)) + Numeric.EpsilonF;
// Sphere at camera position.
geometricObject.Pose = cameraNode.PoseWorld;
screenSize = GraphicsHelper.GetScreenSize(cameraNode, viewport, geometricObject);
Assert.IsTrue(Numeric.AreEqual(screenSize.X, 50.0f, 10f));
Assert.IsTrue(Numeric.AreEqual(screenSize.Y, 50.0f, 10f));
// Sphere at near plane.
geometricObject.Pose = cameraNode.PoseWorld * new Pose(new Vector3F(0.123f, -0.543f, -1));
screenSize = GraphicsHelper.GetScreenSize(cameraNode, viewport, geometricObject);
Assert.IsTrue(Numeric.AreEqual(screenSize.X, 50.0f, 10f));
Assert.IsTrue(Numeric.AreEqual(screenSize.Y, 50.0f, 10f));
// Double distance --> same size
geometricObject.Pose = cameraNode.PoseWorld * new Pose(new Vector3F(0.123f, -0.543f, -2));
screenSize = GraphicsHelper.GetScreenSize(cameraNode, viewport, geometricObject);
Assert.IsTrue(Numeric.AreEqual(screenSize.X, 50.0f, 10f));
Assert.IsTrue(Numeric.AreEqual(screenSize.Y, 50.0f, 10f));
}
public SplitScreenSample(Microsoft.Xna.Framework.Game game)
: base(game)
{
SampleFramework.IsMouseVisible = false;
_graphicsScreen = new SplitScreen(Services);
_graphicsScreen.DrawReticle = true;
GraphicsService.Screens.Insert(0, _graphicsScreen);
Services.Register(typeof(DebugRenderer), null, _graphicsScreen.DebugRenderer);
Services.Register(typeof(IScene), null, _graphicsScreen.Scene);
// Add gravity and damping to the physics Simulation.
Simulation.ForceEffects.Add(new Gravity());
Simulation.ForceEffects.Add(new Damping());
// Add a custom game object which controls the camera of player A.
var cameraGameObject = new CameraObject(Services);
GameObjectService.Objects.Add(cameraGameObject);
_graphicsScreen.ActiveCameraNode = cameraGameObject.CameraNode;
var projection = (PerspectiveProjection)cameraGameObject.CameraNode.Camera.Projection;
projection.SetFieldOfView(
projection.FieldOfViewY,
GraphicsService.GraphicsDevice.Viewport.AspectRatio / 2,
projection.Near,
projection.Far);
cameraGameObject.CameraNode.Camera = new Camera(projection);
// A second camera for player B.
_cameraNodeB = new CameraNode(cameraGameObject.CameraNode.Camera);
_graphicsScreen.ActiveCameraNodeB = _cameraNodeB;
GameObjectService.Objects.Add(new GrabObject(Services));
GameObjectService.Objects.Add(new GroundObject(Services));
GameObjectService.Objects.Add(new DudeObject(Services));
GameObjectService.Objects.Add(new ObjectCreatorObject(Services));
GameObjectService.Objects.Add(new LavaBallsObject(Services));
GameObjectService.Objects.Add(new FogObject(Services));
GameObjectService.Objects.Add(new StaticObject(Services, "Barrier/Barrier", 0.9f, new Pose(new Vector3F(0, 0, -2))));
GameObjectService.Objects.Add(new StaticObject(Services, "Barrier/Cylinder", 0.9f, new Pose(new Vector3F(3, 0, 0), QuaternionF.CreateRotationY(MathHelper.ToRadians(-20)))));
GameObjectService.Objects.Add(new StaticSkyObject(Services));
// Add a few palm trees.
Random random = new Random(12345);
for (int i = 0; i < 10; i++)
{
Vector3F position = new Vector3F(random.NextFloat(-3, -8), 0, random.NextFloat(0, -5));
Matrix33F orientation = Matrix33F.CreateRotationY(random.NextFloat(0, ConstantsF.TwoPi));
float scale = random.NextFloat(0.5f, 1.2f);
GameObjectService.Objects.Add(new StaticObject(Services, "PalmTree/palm_tree", scale, new Pose(position, orientation)));
}
}
public CameraComponent(GameScreen sc)
{
PerspectiveProjection projection = new PerspectiveProjection();
projection.SetFieldOfView(MathHelper.PiOver4,
sc._graphicsService.GraphicsDevice.Viewport.AspectRatio,
0.1f, 1000.0f);
_cameraNode = new CameraNode(new Camera(projection));
_position = new Vector3F(50f, 120.0f, 50f);
_yaw = MathHelper.ToRadians(45.0f);
}
//--------------------------------------------------------------
#region Methods
//--------------------------------------------------------------
protected override void OnLoad()
{
var graphicsService = _services.GetInstance<IGraphicsService>();
// Define camera projection.
var projection = new PerspectiveProjection();
projection.SetFieldOfView(
ConstantsF.PiOver4,
graphicsService.GraphicsDevice.Viewport.AspectRatio,
0.1f,
1000.0f);
// Create a camera node.
CameraNode = new CameraNode(new Camera(projection));
}
// OnLoad() is called when the GameObject is added to the IGameObjectService.
protected override void OnLoad()
{
// Create a camera node.
CameraNode = new CameraNode(new Camera(new OrthographicProjection()))
{
Name = "PlayerCamera"
};
// Add to scene.
// (This is usually optional. Since cameras do not have a visual representation,
// it makes no difference if the camera is actually part of the scene graph or
// not. - Except when other scene nodes are attached to the camera. In this case
// the camera needs to be in the scene.)
var scene = _services.GetInstance<IScene>();
if (scene != null)
scene.Children.Add(CameraNode);
ResetPose();
ResetProjection();
}
// OnLoad() is called when the GameObject is added to the IGameObjectService.
protected override void OnLoad()
{
// Create a camera node.
CameraNode = new CameraNode(new Camera(new PerspectiveProjection()))
{
Name = "PlayerCamera"
};
// Add to scene.
// (This is usually optional. Since cameras do not have a visual representation,
// it makes no difference if the camera is actually part of the scene graph or
// not. - Except when other scene nodes are attached to the camera. In this case
// the camera needs to be in the scene.)
var scene = _services.GetInstance<IScene>();
if (scene != null)
scene.Children.Add(CameraNode);
ResetPose();
ResetProjection();
// Add GUI controls to the Options window.
var sampleFramework = _services.GetInstance<SampleFramework>();
var optionsPanel = sampleFramework.AddOptions("Game Objects");
var panel = SampleHelper.AddGroupBox(optionsPanel, "CameraObject");
SampleHelper.AddSlider(
panel,
"Camera far distance",
"F0",
1,
5000,
_farDistance,
value =>
{
_farDistance = value;
ResetProjection();
});
}
public CameraObject()
{
base.Name = "Camera";
_inputService = ServiceLocator.Current.GetInstance<IInputService>();
var graphicsService = ServiceLocator.Current.GetInstance<IGraphicsService>();
var gameObjectManager = ServiceLocator.Current.GetInstance<IGameObjectService>();
var screen = ((BasicScreen)graphicsService.Screens["Default"]);
//_debugRenderer = screen.DebugRenderer;
PerspectiveProjection projection = new PerspectiveProjection();
projection.SetFieldOfView(Microsoft.Xna.Framework.MathHelper.PiOver4,
graphicsService.GraphicsDevice.Viewport.AspectRatio,
0.1f, 1000.0f);
_cameraNode = new CameraNode(new Camera(projection));
screen.Scene.Children.Add(_cameraNode);
screen.ActiveCamera = _cameraNode;
ResetCamera();
View = _cameraNode.View.ToXna();
Projection = _cameraNode.Camera.Projection.ToXna();
}
/// <summary>
/// Gets the rectangle that encloses the specified geometric object in the viewport.
/// </summary>
/// <param name="cameraNode">The camera node.</param>
/// <param name="viewport">The viewport.</param>
/// <param name="geometricObject">The geometric object.</param>
/// <returns>The rectangle that encloses <paramref name="geometricObject"/>.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="cameraNode"/> or <paramref name="geometricObject"/> is
/// <see langword="null"/>.
/// </exception>
internal static Rectangle GetViewportRectangle(CameraNode cameraNode, Viewport viewport, IGeometricObject geometricObject)
{
if (cameraNode == null)
throw new ArgumentNullException("cameraNode");
if (geometricObject == null)
throw new ArgumentNullException("geometricObject");
// For a uniformly scaled sphere we can use the specialized GetScissorRectangle method.
var sphereShape = geometricObject.Shape as SphereShape;
if (sphereShape != null)
{
Vector3F scale = geometricObject.Scale;
if (scale.X == scale.Y && scale.Y == scale.Z)
{
return GetViewportRectangle(cameraNode, viewport, geometricObject.Pose.Position,
scale.X * sphereShape.Radius);
}
}
// Relative bounds: (left, top, right, bottom).
Vector4F bounds = GetBounds(cameraNode, geometricObject);
// Rectangle in viewport.
int left = (int)(bounds.X * viewport.Width); // implicit floor()
int top = (int)(bounds.Y * viewport.Height); // implicit floor()
int right = (int)Math.Ceiling(bounds.Z * viewport.Width);
int bottom = (int)Math.Ceiling(bounds.W * viewport.Height);
return new Rectangle(left, top, right - left, bottom - top);
}
public void GetScreenSizeException2()
{
var cameraNode = new CameraNode(new Camera(new PerspectiveProjection()));
var viewport = new Viewport(10, 10, 200, 100);
GraphicsHelper.GetScreenSize(cameraNode, viewport, null);
}
/// <overloads>
/// <summary>
/// Gets a rectangle that encloses the specified object in the viewport.
/// </summary>
/// </overloads>
///
/// <summary>
/// Gets the rectangle that encloses the specified sphere in the viewport.
/// </summary>
/// <param name="cameraNode">The camera node.</param>
/// <param name="viewport">The viewport.</param>
/// <param name="positionWorld">The sphere center in world space.</param>
/// <param name="radius">The sphere radius.</param>
/// <returns>The rectangle that encloses the sphere.</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="cameraNode"/> is <see langword="null"/>.
/// </exception>
internal static Rectangle GetViewportRectangle(CameraNode cameraNode, Viewport viewport, Vector3F positionWorld, float radius)
{
if (cameraNode == null)
throw new ArgumentNullException("cameraNode");
// Relative bounds: (left, top, right, bottom).
Vector4F bounds = GetBounds(cameraNode, positionWorld, radius);
// Rectangle in viewport.
int left = (int)(bounds.X * viewport.Width); // implicit floor()
int top = (int)(bounds.Y * viewport.Height); // implicit floor()
int right = (int)Math.Ceiling(bounds.Z * viewport.Width);
int bottom = (int)Math.Ceiling(bounds.W * viewport.Height);
return new Rectangle(left, top, right - left, bottom - top);
}
/// <overloads>
/// <summary>
/// Gets a the bounds of the specified object relative to the viewport.
/// </summary>
/// </overloads>
///
/// <summary>
/// Gets a the bounds of the specified geometric object relative to the viewport.
/// </summary>
/// <param name="cameraNode">The camera node.</param>
/// <param name="geometricObject">The geometric object.</param>
/// <returns>
/// The bounds (left, top, right, bottom) where each entry is in the range [0, 1].
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="cameraNode"/> or <paramref name="geometricObject"/> is
/// <see langword="null"/>.
/// </exception>
internal static Vector4F GetBounds(CameraNode cameraNode, IGeometricObject geometricObject)
{
// Notes:
// Do not call this GetBounds() method for spheres. Use the other overload for spheres.
//
// At first this problem seems trivial, we only have to get the support
// points of the geometric object's shape in the directions of the frustum
// plane normal vectors. The we project these points to the near plane...
// But this does not work because which can be seen if you draw simple
// drop down sketch. Actually each eye ray has its own direction therefore
// it has its normal and its own support direction!
if (cameraNode == null)
throw new ArgumentNullException("cameraNode");
if (geometricObject == null)
throw new ArgumentNullException("geometricObject");
Debug.Assert(!(geometricObject.Shape is SphereShape), "Call a different GetBounds() overload for spheres!");
// Projection properties.
var camera = cameraNode.Camera;
var projection = camera.Projection;
float near = projection.Near;
float left = projection.Left;
float right = projection.Right;
float width = projection.Width;
float top = projection.Top;
float bottom = projection.Bottom;
float height = projection.Height;
// Get AABB in view space.
Pose localToViewPose = cameraNode.PoseWorld.Inverse * geometricObject.Pose;
Aabb aabb = geometricObject.Shape.GetAabb(geometricObject.Scale, localToViewPose);
// Is the AABB in front of the near plane (= totally clipped)?
if (aabb.Minimum.Z >= -near)
return new Vector4F(0);
// Does the AABB contain the origin?
if (GeometryHelper.HaveContact(aabb, Vector3F.Zero))
return new Vector4F(0, 0, 1, 1);
// Project the AABB far face to the near plane.
Vector2F min;
min.X = aabb.Minimum.X / -aabb.Minimum.Z * near;
min.Y = aabb.Minimum.Y / -aabb.Minimum.Z * near;
Vector2F max;
max.X = aabb.Maximum.X / -aabb.Minimum.Z * near;
max.Y = aabb.Maximum.Y / -aabb.Minimum.Z * near;
// If the AABB z extent overlaps the origin, some results are invalid.
if (aabb.Maximum.Z > -Numeric.EpsilonF)
{
if (aabb.Minimum.X < 0)
min.X = left;
if (aabb.Maximum.X > 0)
max.X = right;
if (aabb.Minimum.Y < 0)
min.Y = bottom;
if (aabb.Maximum.Y > 0)
max.Y = top;
}
else
{
// The AABB near face is also in front. Project AABB near face to near plane
// and take the most extreme.
min.X = Math.Min(min.X, aabb.Minimum.X / -aabb.Maximum.Z * near);
min.Y = Math.Min(min.Y, aabb.Minimum.Y / -aabb.Maximum.Z * near);
max.X = Math.Max(max.X, aabb.Maximum.X / -aabb.Maximum.Z * near);
max.Y = Math.Max(max.Y, aabb.Maximum.Y / -aabb.Maximum.Z * near);
}
Vector4F bounds;
bounds.X = (min.X - left) / width;
bounds.Y = (top - max.Y) / height;
bounds.Z = (max.X - left) / width;
bounds.W = (top - min.Y) / height;
bounds.X = MathHelper.Clamp(bounds.X, 0, 1);
bounds.Y = MathHelper.Clamp(bounds.Y, 0, 1);
bounds.Z = MathHelper.Clamp(bounds.Z, bounds.X, 1);
bounds.W = MathHelper.Clamp(bounds.W, bounds.Y, 1);
return bounds;
}
/// <summary>
/// Estimates the size of an object in pixels.
/// </summary>
/// <param name="cameraNode">The camera node with perspective projection.</param>
/// <param name="viewport">The viewport.</param>
/// <param name="geometricObject">The geometric object.</param>
/// <returns>
/// The estimated width and height of <paramref name="geometricObject"/> in pixels.
/// </returns>
/// <remarks>
/// The method assumes that the object is fully visible by the camera, i.e. it does not perform
/// frustum culling. It estimates the size of <paramref name="geometricObject"/> based on its
/// bounding shape.
/// </remarks>
/// <exception cref="ArgumentNullException">
/// <paramref name="cameraNode"/> or <paramref name="geometricObject"/> is
/// <see langword="null"/>.
/// </exception>
internal static Vector2F GetScreenSize(CameraNode cameraNode, Viewport viewport, IGeometricObject geometricObject)
{
// This implementation is just for reference. (It is preferable to optimize
// and inline the code when needed.)
if (cameraNode == null)
throw new ArgumentNullException("cameraNode");
if (geometricObject == null)
throw new ArgumentNullException("geometricObject");
// Use bounding sphere of AABB in world space.
var aabb = geometricObject.Aabb;
float diameter = aabb.Extent.Length;
float width = diameter;
float height = diameter;
Matrix44F proj = cameraNode.Camera.Projection;
bool isOrthographic = (proj.M33 != 0);
// ----- xScale, yScale:
// Orthographic Projection:
// proj.M00 = 2 / (right - left)
// proj.M11 = 2 / (top - bottom)
//
// Perspective Projection:
// proj.M00 = 2 * zNear / (right - left) = 1 / tan(fovX/2)
// proj.M11 = 2 * zNear / (top - bottom) = 1 / tan(fovY/2)
float xScale = Math.Abs(proj.M00);
float yScale = Math.Abs(proj.M11);
// Screen size [px].
Vector2F screenSize;
if (isOrthographic)
{
// ----- Orthographic Projection
// sizeX = viewportWidth * width / (right - left)
// = viewportWidth * width * xScale / 2
screenSize.X = viewport.Width * width * xScale / 2;
// sizeY = viewportHeight* height / (top - bottom)
// = viewportHeight* height * xScale / 2
screenSize.Y = viewport.Height * height * yScale / 2;
}
else
{
// ----- Perspective Projection
// Camera properties.
Pose cameraPose = cameraNode.PoseWorld;
Vector3F cameraPosition = cameraPose.Position;
Matrix33F cameraOrientation = cameraPose.Orientation;
Vector3F cameraForward = -cameraOrientation.GetColumn(2);
// Get planar distance from camera to object by projecting the distance
// vector onto the look direction.
Vector3F cameraToObject = aabb.Center - cameraPosition;
float distance = Vector3F.Dot(cameraToObject, cameraForward);
// Assume that object is in front of camera (no frustum culling).
distance = Math.Abs(distance);
// Avoid division by zero.
if (distance < Numeric.EpsilonF)
distance = Numeric.EpsilonF;
// sizeX = viewportWidth * width / (objectDistance * 2 * tan(fovX/2))
// = viewportWidth * width * zNear / (objectDistance * (right - left))
// = viewportWidth * width * xScale / (2 * objectDistance)
screenSize.X = viewport.Width * width * xScale / (2 * distance);
// sizeY = viewportHeight * height / (objectDistance * 2 * tan(fovY/2))
// = viewportHeight * height * zNear / (objectDistance * (top - bottom))
// = viewportHeight * height * yScale / (2 * objectDistance)
screenSize.Y = viewport.Height * height * yScale / (2 * distance);
}
return screenSize;
}
/// <summary>
/// Gets the bounds of the specified sphere relative to the viewport.
/// </summary>
/// <param name="cameraNode">The camera node.</param>
/// <param name="positionWorld">The sphere center in world space.</param>
/// <param name="radius">The sphere radius.</param>
/// <returns>
/// The bounds (left, top, right, bottom) where each entry is in the range [0, 1].
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="cameraNode"/> is <see langword="null"/>.
/// </exception>
internal static Vector4F GetBounds(CameraNode cameraNode, Vector3F positionWorld, float radius)
{
var camera = cameraNode.Camera;
var projection = camera.Projection;
float near = projection.Near;
float left = projection.Left;
float width = projection.Width;
float top = projection.Top;
float height = projection.Height;
Vector3F l = cameraNode.PoseWorld.ToLocalPosition(positionWorld);
float r = radius;
// Default bounds (left, top, right, bottom)
var bounds = new Vector4F(0, 0, 1, 1);
// ----- Solve for N = (x, 0, z).
// Discriminant already divided by 4:
float d = (r * r * l.X * l.X - (l.X * l.X + l.Z * l.Z) * (r * r - l.Z * l.Z));
if (d > 0)
{
// Camera is outside the sphere.
float rootD = (float)Math.Sqrt(d);
// Now check two possible solutions (+/- rootD):
float nx1 = (r * l.X + rootD) / (l.X * l.X + l.Z * l.Z);
float nx2 = (r * l.X - rootD) / (l.X * l.X + l.Z * l.Z);
float nz1 = (r - nx1 * l.X) / l.Z;
float nz2 = (r - nx2 * l.X) / l.Z;
// Compute tangent position (px, 0, pz) on the sphere.
float pz1 = (l.X * l.X + l.Z * l.Z - r * r) / (l.Z - (nz1 / nx1) * l.X);
float pz2 = (l.X * l.X + l.Z * l.Z - r * r) / (l.Z - (nz2 / nx2) * l.X);
if (pz1 < 0)
{
// Plane (nx1, 0, nz1) is within camera frustum.
float px = -pz1 * nz1 / nx1;
float x = nz1 * near / nx1; // x coordinate on the near plane.
float boundsX = (x - left) / width; // Value relative to viewport. (0 = left, 1 = right)
// Shrink the scissor rectangle on the left or on the right side.
if (px < l.X)
bounds.X = Math.Max(bounds.X, boundsX);
else
bounds.Z = Math.Min(bounds.Z, boundsX);
}
if (pz2 < 0)
{
float px = -pz2 * nz2 / nx2;
float x = nz2 * near / nx2;
float scissorX = (x - left) / width;
if (px < l.X)
bounds.X = Math.Max(bounds.X, scissorX);
else
bounds.Z = Math.Min(bounds.Z, scissorX);
}
}
// ----- Solve for N = (0, y, z) first.
d = (r * r * l.Y * l.Y - (l.Y * l.Y + l.Z * l.Z) * (r * r - l.Z * l.Z));
if (d > 0)
{
// Camera is outside the sphere.
float rootD = (float)Math.Sqrt(d);
float ny1 = (r * l.Y + rootD) / (l.Y * l.Y + l.Z * l.Z);
float ny2 = (r * l.Y - rootD) / (l.Y * l.Y + l.Z * l.Z);
float nz1 = (r - ny1 * l.Y) / l.Z;
float nz2 = (r - ny2 * l.Y) / l.Z;
float pz1 = (l.Y * l.Y + l.Z * l.Z - r * r) / (l.Z - (nz1 / ny1) * l.Y);
float pz2 = (l.Y * l.Y + l.Z * l.Z - r * r) / (l.Z - (nz2 / ny2) * l.Y);
if (pz1 < 0)
{
float py = -pz1 * nz1 / ny1;
float y = nz1 * near / ny1;
float scissorY = -(y - top) / height;
if (py > l.Y)
bounds.Y = Math.Max(bounds.Y, scissorY);
else
bounds.W = Math.Min(bounds.W, scissorY);
}
if (pz2 < 0)
{
float py = -pz2 * nz2 / ny2;
float y = nz2 * near / ny2;
float scissorY = -(y - top) / height;
if (py > l.Y)
bounds.Y = Math.Max(bounds.Y, scissorY);
else
bounds.W = Math.Min(bounds.W, scissorY);
}
}
bounds.X = MathHelper.Clamp(bounds.X, 0, 1);
bounds.Y = MathHelper.Clamp(bounds.Y, 0, 1);
bounds.Z = MathHelper.Clamp(bounds.Z, bounds.X, 1);
bounds.W = MathHelper.Clamp(bounds.W, bounds.Y, 1);
return bounds;
}
protected override void OnUnload()
{
CameraNode.Dispose(false);
CameraNode = null;
}
protected override void OnUnload()
{
var graphicsService = ServiceLocator.Current.GetInstance<IGraphicsService>();
var screen = ((BasicScreen)graphicsService.Screens["Default"]);
if (screen.ActiveCamera == _cameraNode)
{
screen.ActiveCamera = null;
}
_cameraNode.Parent.Children.Remove(_cameraNode);
_cameraNode.Dispose();
_cameraNode = null;
}
public static float GetViewNormalizedDistance(SceneNode sceneNode, CameraNode cameraNode)
{
Debug.Assert(
sceneNode.ScaleWorld.X > 0 && sceneNode.ScaleWorld.Y > 0 && sceneNode.ScaleWorld.Z > 0,
"Assuming that all scale factors are positive.");
Pose cameraPose = cameraNode.PoseWorld;
Vector3F cameraToObject = sceneNode.PoseWorld.Position - cameraPose.Position;
// Get planar distance by projecting the distance vector onto the look direction.
// This is stable for sideways movement but unstable for camera rotations.
//Vector3F cameraForward = -cameraPose.Orientation.GetColumn(2);
//float distance = Math.Abs(Vector3F.Dot(cameraToObject, cameraForward));
// Get normal (radial) distance (stable for camera rotations, unstable for sideways movement).
float distance = cameraToObject.Length;
// Make distance independent of current FOV and scale.
distance = GetViewNormalizedDistance(distance, cameraNode.Camera.Projection);
distance /= sceneNode.ScaleWorld.LargestComponent;
return distance;
}
private void InitializeAudio()
{
// The camera defines the position of the audio listener.
_listener = new AudioListener();
_cameraNode = GraphicsScreen.CameraNode;
// Set a distance scale that is suitable for our demo.
SoundEffect.DistanceScale = 10;
// ----- Load sounds, create instances and emitters.
_hitSound = ContentManager.Load<SoundEffect>("Audio/Hit");
for (int i = 0; i < _hitSoundInstances.Length; i++)
{
_hitSoundInstances[i] = _hitSound.CreateInstance();
// Change pitch. Our instance sounds better this way.
_hitSoundInstances[i].Pitch = -1;
_hitEmitters[i] = new AudioEmitter();
}
_scratchSound = ContentManager.Load<SoundEffect>("Audio/Scratch");
_scratchSoundInstance = _scratchSound.CreateInstance();
_scratchEmitter = new AudioEmitter();
_rollSound = ContentManager.Load<SoundEffect>("Audio/Roll");
_rollSoundInstance = _rollSound.CreateInstance();
_rollEmitter = new AudioEmitter();
// The hit sounds are instant sounds. The scratch and rolling sounds are looped.
_scratchSoundInstance.IsLooped = true;
_rollSoundInstance.IsLooped = true;
}
//--------------------------------------------------------------
#region Creation & Cleanup
//--------------------------------------------------------------
/// <summary>
/// Initializes a new instance of the <see cref="VarianceShadowMapRenderer"/> class.
/// </summary>
/// <param name="render">
/// The method which renders the scene into the shadow map. Must not be <see langword="null"/>.
/// See <see cref="RenderCallback"/> for more information.
/// </param>
public VarianceShadowMapRenderer(Func<RenderContext, bool> render)
{
if (render == null)
throw new ArgumentNullException("render");
RenderCallback = render;
_cameraVolume = new PerspectiveViewVolume();
_orthographicCameraNode = new CameraNode(new Camera(new OrthographicProjection()));
}
private static bool IsCameraUnderwater(CustomSceneQuery query, CameraNode cameraNode)
{
var cameraPosition = cameraNode.PoseWorld.Position;
foreach (var node in query.RenderableNodes)
{
var waterNode = node as WaterNode;
if (waterNode != null && waterNode.IsUnderwater(cameraPosition))
return true;
}
return false;
}
/// <summary>
/// Initializes a new instance of the <see cref="OcclusionBuffer"/> class with the specified
/// buffer size.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <param name="width">The width of the occlusion buffer.</param>
/// <param name="height">The height of the occlusion buffer.</param>
/// <param name="bufferSize">
/// The size of the internal triangle buffer (= max number of occluder triangles that can be
/// rendered in a single draw call). Needs to be large enough to store the most complex
/// occluder.
/// </param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> is <see langword="null"/>.
/// </exception>
public OcclusionBuffer(IGraphicsService graphicsService, int width, int height, int bufferSize)
{
if (graphicsService == null)
throw new ArgumentNullException("graphicsService");
// For simplicity only accept power-of-two formats.
if (!MathHelper.IsPowerOf2(width) && !MathHelper.IsPowerOf2(height))
throw new ArgumentException("Width and height of occlusion buffer expected to be a power of two.");
// The current texture atlas layout assumes that width ≥ height.
if (width < height)
throw new ArgumentException("Width expected to be greater than or equal to the height of the occlusion buffer.");
var graphicsDevice = graphicsService.GraphicsDevice;
if (bufferSize < 1)
throw new ArgumentOutOfRangeException("bufferSize", "The buffer size needs to be creater than 1.");
if (bufferSize >= graphicsDevice.GetMaxPrimitivesPerCall())
throw new ArgumentOutOfRangeException("bufferSize", "The buffer size exceeds the max number of primitives supported by the current graphics device.");
// ----- RenderBatch handles occluders.
// bufferSize is the max number of triangles per draw call.
// Vertex buffer size:
// - In the worst case n triangles need n * 3 vertices.
// - The max size is limited to 65536 because 16-bit indices are used.
var vertices = new Vector3F[Math.Min(bufferSize * 3, ushort.MaxValue + 1)];
// Index buffer size: number of triangles * 3
var indices = new ushort[bufferSize * 3];
_renderBatch = new RenderBatch<Vector3F, ushort>(
graphicsDevice,
VertexPosition.VertexDeclaration,
vertices, true,
indices, true);
_effect = graphicsService.Content.Load<Effect>("DigitalRune/OcclusionCulling");
_parameterClampAabbMinimum = _effect.Parameters["ClampAabbMinimum"];
_parameterClampAabbMaximum = _effect.Parameters["ClampAabbMaximum"];
_parameterCameraViewProj = _effect.Parameters["CameraViewProj"];
_parameterCameraNear = _effect.Parameters["CameraNear"];
_parameterCameraFar = _effect.Parameters["CameraFar"];
_parameterCameraPosition = _effect.Parameters["CameraPosition"];
_parameterNormalizationFactor = _effect.Parameters["NormalizationFactor"];
_parameterLightViewProj = _effect.Parameters["LightViewProj"];
_parameterLightToCamera = _effect.Parameters["LightToCamera"];
_parameterHzbSize = _effect.Parameters["HzbSize"];
_parameterTargetSize = _effect.Parameters["TargetSize"];
_parameterAtlasSize = _effect.Parameters["AtlasSize"];
_parameterTexelOffset = _effect.Parameters["TexelOffset"];
_parameterHalfTexelOffset = _effect.Parameters["HalfTexelOffset"];
_parameterMaxLevel = _effect.Parameters["MaxLevel"];
_parameterHzbTexture = _effect.Parameters["HzbTexture"];
_parameterLightHzbTexture = _effect.Parameters["LightHzb"];
_parameterDebugLevel = _effect.Parameters["DebugLevel"];
_parameterDebugMinimum = _effect.Parameters["DebugMinimum"];
_parameterDebugMaximum = _effect.Parameters["DebugMaximum"];
_techniqueOccluder = _effect.Techniques["Occluder"];
_techniqueDownsample = _effect.Techniques["Downsample"];
_techniqueCopy = _effect.Techniques["Copy"];
_techniqueQuery = _effect.Techniques["Query"];
_techniqueVisualize = _effect.Techniques["Visualize"];
_occlusionProxies = new List<IOcclusionProxy>();
_sceneNodes = new List<SceneNode>();
// Store delegate methods to avoid garbage.
_updateOcclusionProxies = UpdateOcclusionProxies;
_updateOcclusionProxy = UpdateOcclusionProxy;
_splitVolume = new PerspectiveViewVolume();
_orthographicCameraNode = new CameraNode(new Camera(new OrthographicProjection()));
_shadowCasters = new List<SceneNode>();
/*
// By default, enable multithreading on multi-core systems.
#if WP7 || UNITY
// Cannot access Environment.ProcessorCount in phone app. (Security issue.)
EnableMultithreading = false;
#else
// Enable multithreading by default if the current system has multiple processors.
EnableMultithreading = Environment.ProcessorCount > 1;
// Multithreading works but Parallel.For of Xamarin.Android/iOS is very inefficient.
if (GlobalSettings.PlatformID == PlatformID.Android || GlobalSettings.PlatformID == PlatformID.iOS)
EnableMultithreading = false;
#endif
*/
// Disable multithreading by default. Multithreading causes massive lags in the
// XNA version, but the MonoGame version is not affected!?
EnableMultithreading = false;
// For best performance: Enable progressive shadow caster culling.
ProgressiveShadowCasterCulling = true;
Statistics = new OcclusionCullingStatistics();
InitializeBuffers(graphicsDevice, width, height);
}
public SceneCaptureCubeSample(Microsoft.Xna.Framework.Game game)
: base(game)
{
SampleFramework.IsMouseVisible = false;
// Create a graphics screen. This screen has to call the SceneCaptureRenderer
// to handle the SceneCaptureNodes!
_graphicsScreen = new DeferredGraphicsScreen(Services) { DrawReticle = true };
GraphicsService.Screens.Insert(0, _graphicsScreen);
GameObjectService.Objects.Add(new DeferredGraphicsOptionsObject(Services));
Services.Register(typeof(DebugRenderer), null, _graphicsScreen.DebugRenderer);
Services.Register(typeof(IScene), null, _graphicsScreen.Scene);
// Add gravity and damping to the physics Simulation.
Simulation.ForceEffects.Add(new Gravity());
Simulation.ForceEffects.Add(new Damping());
// Add a custom game object which controls the camera.
var cameraGameObject = new CameraObject(Services);
GameObjectService.Objects.Add(cameraGameObject);
_graphicsScreen.ActiveCameraNode = cameraGameObject.CameraNode;
// More standard objects.
GameObjectService.Objects.Add(new GrabObject(Services));
GameObjectService.Objects.Add(new ObjectCreatorObject(Services));
//GameObjectService.Objects.Add(new StaticSkyObject(Services));
GameObjectService.Objects.Add(new DynamicSkyObject(Services, true, false, true));
GameObjectService.Objects.Add(new GroundObject(Services));
GameObjectService.Objects.Add(new DudeObject(Services));
GameObjectService.Objects.Add(new DynamicObject(Services, 1));
GameObjectService.Objects.Add(new DynamicObject(Services, 2));
GameObjectService.Objects.Add(new DynamicObject(Services, 5));
GameObjectService.Objects.Add(new DynamicObject(Services, 6));
GameObjectService.Objects.Add(new DynamicObject(Services, 7));
GameObjectService.Objects.Add(new FogObject(Services) { AttachToCamera = true });
GameObjectService.Objects.Add(new LavaBallsObject(Services));
// Add a few palm trees.
Random random = new Random(12345);
for (int i = 0; i < 10; i++)
{
Vector3F position = new Vector3F(random.NextFloat(-3, -8), 0, random.NextFloat(0, -5));
Matrix33F orientation = Matrix33F.CreateRotationY(random.NextFloat(0, ConstantsF.TwoPi));
float scale = random.NextFloat(0.5f, 1.2f);
GameObjectService.Objects.Add(new StaticObject(Services, "PalmTree/palm_tree", scale, new Pose(position, orientation)));
}
// Load the "Bubble" mesh and place it at a fixed position in the scene.
var modelNode = ContentManager.Load<ModelNode>("Bubble/Bubble");
var meshNode = modelNode.GetDescendants().OfType<MeshNode>().First().Clone();
meshNode.PoseWorld = new Pose(new Vector3F(0, 1, 0));
_graphicsScreen.Scene.Children.Add(meshNode);
// Surface of the mesh should reflect the scene in real-time. Reflections are
// created using environment mapping: The scene is rendered into a cube map,
// which is then applied to the mesh.
// To render the scene into a cube map, we need to define a CameraNode and a
// SceneCaptureNode: The CameraNode defines the point from where the scene is
// captured. The SceneCaptureNode defines where and in which format the captured
// image is needed.
// Attach a camera to the center of the mesh.
var projection = new PerspectiveProjection();
projection.SetFieldOfView(ConstantsF.PiOver2, 1, 0.1f, 20);
var captureCameraNode = new CameraNode(new Camera(projection));
meshNode.Children = new SceneNodeCollection { captureCameraNode };
// Attach a SceneCaptureNode with a cube map render target to the mesh.
var renderToTexture = new RenderToTexture
{
Texture = new RenderTargetCube(
GraphicsService.GraphicsDevice,
256,
true,
SurfaceFormat.Color,
DepthFormat.None),
};
var sceneCaptureNode = new SceneCaptureNode(renderToTexture)
{
Shape = meshNode.Shape,
CameraNode = captureCameraNode,
};
meshNode.Children.Add(sceneCaptureNode);
// The bubble model uses a special effect and is rendered in the "AlphaBlend"
// render pass. Let's modify the effect parameters to use the created cube map
// as the reflection map of the bubble.
var effectBinding = meshNode.Mesh.Materials[0]["AlphaBlend"];
effectBinding.Set("ReflectionStrength", 0.5f);
effectBinding.Set("RefractionStrength", 0.0f);
effectBinding.Set("FresnelBias", 1.0f);
effectBinding.Set("BlendMode", 1.0f);
effectBinding.Set("Alpha", 1.0f);
effectBinding.Set("CustomEnvironmentMap", (TextureCube)renderToTexture.Texture);
}