protected internal virtual void OnGetSizeAndIntensity(LensFlareNode node, RenderContext context, int visiblePixels, int totalPixels, out float size, out float intensity)
{
// Constant size.
size = Size;
intensity = node.Intensity * Intensity;
// Intensity depends on the number of visible (unoccluded) pixels.
if (context.GraphicsService.GraphicsDevice.GraphicsProfile == GraphicsProfile.HiDef)
{
intensity *= (float)visiblePixels / totalPixels;
}
// Fog decreases the intensity.
var scene = context.Scene;
var cameraNode = context.CameraNode;
if (scene != null && cameraNode != null)
{
var query = scene.Query <FogQuery>(cameraNode, context);
foreach (var fogNode in query.FogNodes)
{
var flarePosition = IsDirectional // For directional flares, choose a position "far" away ;-)
? cameraNode.PoseWorld.Position + node.PoseWorld.Orientation.GetColumn(2) * cameraNode.Camera.Projection.Far
: node.PoseWorld.Position;
intensity *= (1 - fogNode.Fog.GetIntensity(fogNode, cameraNode, flarePosition));
}
}
}
// OnLoad() is called when the GameObject is added to the IGameObjectService.
protected override void OnLoad()
{
var content = _services.GetInstance <ContentManager>();
_skyboxNode = new SkyboxNode(content.Load <TextureCube>("Sky2"))
{
Color = new Vector3F(SkyExposure),
};
// The ambient light.
var ambientLight = new AmbientLight
{
Color = new Vector3F(0.9f, 0.9f, 1f),
HdrScale = 0.1f,
Intensity = 0.5f,
HemisphericAttenuation = 0.8f,
};
_ambientLightNode = new LightNode(ambientLight)
{
Name = "Ambient",
};
// The main directional light.
var sunlight = new DirectionalLight
{
Color = new Vector3F(1, 0.9607844f, 0.9078432f),
HdrScale = 0.4f,
DiffuseIntensity = 1,
SpecularIntensity = 1,
};
_sunlightNode = new LightNode(sunlight)
{
Name = "Sunlight",
Priority = 10, // This is the most important light.
PoseWorld = new Pose(QuaternionF.CreateRotationY(-1.4f) * QuaternionF.CreateRotationX(-0.6f)),
// This light uses Cascaded Shadow Mapping.
Shadow = new CascadedShadow
{
#if XBOX
PreferredSize = 512,
#else
PreferredSize = 1024,
#endif
Prefer16Bit = true,
}
};
// Add a lens flare for the key light.
var lensFlare = new LensFlare(true)
{
QuerySize = 0.2f, Size = 0.2f, Name = "Sun Flare"
};
var lensFlareTexture = content.Load <Texture2D>("LensFlare/LensFlares");
var circleTexture = new PackedTexture("Circle", lensFlareTexture, new Vector2F(0, 0), new Vector2F(0.25f, 0.5f));
var glowTexture = new PackedTexture("Glow", lensFlareTexture, new Vector2F(0.25f, 0), new Vector2F(0.25f, 0.5f));
var ringTexture = new PackedTexture("Ring", lensFlareTexture, new Vector2F(0.5f, 0), new Vector2F(0.25f, 0.5f));
var haloTexture = new PackedTexture("Halo", lensFlareTexture, new Vector2F(0.75f, 0), new Vector2F(0.25f, 0.5f));
var sunTexture = new PackedTexture("Sun", lensFlareTexture, new Vector2F(0, 0.5f), new Vector2F(0.25f, 0.5f));
var streaksTexture = new PackedTexture("Streaks", lensFlareTexture, new Vector2F(0.25f, 0.5f), new Vector2F(0.25f, 0.5f));
var flareTexture = new PackedTexture("Flare", lensFlareTexture, new Vector2F(0.5f, 0.5f), new Vector2F(0.25f, 0.5f));
lensFlare.Elements.Add(new LensFlareElement(-0.2f, 0.55f, 0.0f, new Color(175, 175, 255, 20), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.0f, 0.9f, 0.0f, new Color(255, 255, 255, 255), new Vector2F(0.5f, 0.5f), sunTexture));
lensFlare.Elements.Add(new LensFlareElement(0.0f, 1.8f, 0.0f, new Color(255, 255, 255, 128), new Vector2F(0.5f, 0.5f), streaksTexture));
lensFlare.Elements.Add(new LensFlareElement(0.0f, 2.6f, 0.0f, new Color(255, 255, 200, 64), new Vector2F(0.5f, 0.5f), glowTexture));
lensFlare.Elements.Add(new LensFlareElement(0.5f, 0.12f, 0.0f, new Color(60, 60, 180, 35), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.55f, 0.46f, 0.0f, new Color(100, 100, 200, 60), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.6f, 0.17f, 0.0f, new Color(120, 120, 220, 40), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.85f, 0.2f, 0.0f, new Color(60, 60, 255, 100), new Vector2F(0.5f, 0.5f), ringTexture));
lensFlare.Elements.Add(new LensFlareElement(1.5f, 0.2f, 0.0f, new Color(255, 60, 60, 130), new Vector2F(0.5f, 0.5f), flareTexture));
lensFlare.Elements.Add(new LensFlareElement(0.15f, 0.15f, 0.0f, new Color(255, 60, 60, 90), new Vector2F(0.5f, 0.5f), flareTexture));
lensFlare.Elements.Add(new LensFlareElement(1.3f, 0.6f, 0.0f, new Color(60, 60, 255, 180), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(1.4f, 0.2f, 0.0f, new Color(220, 80, 80, 98), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(1.5f, 0.1f, 0.0f, new Color(220, 80, 80, 85), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(1.6f, 0.5f, 0.0f, new Color(60, 60, 255, 80), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(1.8f, 0.3f, 0.0f, new Color(90, 60, 255, 110), new Vector2F(0.5f, 0.5f), ringTexture));
lensFlare.Elements.Add(new LensFlareElement(1.95f, 0.5f, 0.0f, new Color(60, 60, 255, 120), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(2.0f, 0.15f, 0.0f, new Color(60, 60, 255, 85), new Vector2F(0.5f, 0.5f), circleTexture));
// Add lens flare as a child of the sunlight.
var lensFlareNode = new LensFlareNode(lensFlare);
_sunlightNode.Children = new SceneNodeCollection();
_sunlightNode.Children.Add(lensFlareNode);
// Add scene nodes to scene graph.
var scene = _services.GetInstance <IScene>();
scene.Children.Add(_skyboxNode);
scene.Children.Add(_ambientLightNode);
scene.Children.Add(_sunlightNode);
}
private readonly LensFlareRenderer _lensFlareRenderer; // Handles LensFlareNodes.
public LensFlareSample(Microsoft.Xna.Framework.Game game)
: base(game)
{
SampleFramework.IsMouseVisible = false;
var delegateGraphicsScreen = new DelegateGraphicsScreen(GraphicsService)
{
RenderCallback = Render,
};
GraphicsService.Screens.Insert(0, delegateGraphicsScreen);
// Add a custom game object which controls the camera.
_cameraObject = new CameraObject(Services);
GameObjectService.Objects.Add(_cameraObject);
// Create a new empty scene.
_scene = new Scene();
// Add the camera node to the scene.
_scene.Children.Add(_cameraObject.CameraNode);
// Add a few models to the scene.
var ground = ContentManager.Load <ModelNode>("Ground/Ground").Clone();
_scene.Children.Add(ground);
var box = ContentManager.Load <ModelNode>("MetalGrateBox/MetalGrateBox").Clone();
box.PoseLocal = new Pose(new Vector3(0.5f, 0.5f, 0.5f), Matrix.CreateRotationY(0.1f));
_scene.Children.Add(box);
// Add some lights to the scene which have the same properties as the lights
// of BasicEffect.EnableDefaultLighting().
SceneSample.InitializeDefaultXnaLights(_scene);
// Add a lens flare for the sun light.
var lensFlare = new LensFlare(true); // The sun is a directional light source.
lensFlare.Name = "Sun Flare";
// The Size determines the screen size of the lens flare elements. The value
// is relative to the viewport height.
lensFlare.Size = 0.28f; // 0.28 * viewport height
// The QuerySize of a directional light is the estimated size relative to the
// viewport. This value is used in the hardware occlusion query, which determines
// whether the lens flare is visible.
lensFlare.QuerySize = 0.18f; // 0.18 * viewport height
// All lens flare elements are packed into one texture ("texture atlas").
// The PackedTexture identifies an element within the texture atlas.
// See file Media/LensFlare/LensFlares.png.
// (Credits: The sun lens flare was copied from the XNA racing game - http://exdream.com/XnaRacingGame/.)
var lensFlareTexture = ContentManager.Load <Texture2D>("LensFlare/LensFlares");
var circleTexture = new PackedTexture("Circle", lensFlareTexture, new Vector2F(0, 0), new Vector2F(0.25f, 0.5f));
var glowTexture = new PackedTexture("Glow", lensFlareTexture, new Vector2F(0.25f, 0), new Vector2F(0.25f, 0.5f));
var ringTexture = new PackedTexture("Ring", lensFlareTexture, new Vector2F(0.5f, 0), new Vector2F(0.25f, 0.5f));
var haloTexture = new PackedTexture("Halo", lensFlareTexture, new Vector2F(0.75f, 0), new Vector2F(0.25f, 0.5f));
var sunTexture = new PackedTexture("Sun", lensFlareTexture, new Vector2F(0, 0.5f), new Vector2F(0.25f, 0.5f));
var streaksTexture = new PackedTexture("Streaks", lensFlareTexture, new Vector2F(0.25f, 0.5f), new Vector2F(0.25f, 0.5f));
var flareTexture = new PackedTexture("Flare", lensFlareTexture, new Vector2F(0.5f, 0.5f), new Vector2F(0.25f, 0.5f));
// Add a few elements (circles, glow, rings, halos, streaks, ...) to the lens flare.
lensFlare.Elements.Add(new LensFlareElement(-0.2f, 0.55f, 0.0f, new Color(175, 175, 255, 20), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.0f, 0.9f, 0.0f, new Color(255, 255, 255, 255), new Vector2F(0.5f, 0.5f), sunTexture));
lensFlare.Elements.Add(new LensFlareElement(0.0f, 1.8f, 0.0f, new Color(255, 255, 255, 128), new Vector2F(0.5f, 0.5f), streaksTexture));
lensFlare.Elements.Add(new LensFlareElement(0.0f, 2.6f, 0.0f, new Color(255, 255, 200, 64), new Vector2F(0.5f, 0.5f), glowTexture));
lensFlare.Elements.Add(new LensFlareElement(0.5f, 0.12f, 0.0f, new Color(60, 60, 180, 35), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.55f, 0.46f, 0.0f, new Color(100, 100, 200, 60), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.6f, 0.17f, 0.0f, new Color(120, 120, 220, 40), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(0.85f, 0.2f, 0.0f, new Color(60, 60, 255, 100), new Vector2F(0.5f, 0.5f), ringTexture));
lensFlare.Elements.Add(new LensFlareElement(1.5f, 0.2f, 0.0f, new Color(255, 60, 60, 130), new Vector2F(0.5f, 0.5f), flareTexture));
lensFlare.Elements.Add(new LensFlareElement(0.15f, 0.15f, 0.0f, new Color(255, 60, 60, 90), new Vector2F(0.5f, 0.5f), flareTexture));
lensFlare.Elements.Add(new LensFlareElement(1.3f, 0.6f, 0.0f, new Color(60, 60, 255, 180), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(1.4f, 0.2f, 0.0f, new Color(220, 80, 80, 98), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(1.5f, 0.1f, 0.0f, new Color(220, 80, 80, 85), new Vector2F(0.5f, 0.5f), circleTexture));
lensFlare.Elements.Add(new LensFlareElement(1.6f, 0.5f, 0.0f, new Color(60, 60, 255, 80), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(1.8f, 0.3f, 0.0f, new Color(90, 60, 255, 110), new Vector2F(0.5f, 0.5f), ringTexture));
lensFlare.Elements.Add(new LensFlareElement(1.95f, 0.5f, 0.0f, new Color(60, 60, 255, 120), new Vector2F(0.5f, 0.5f), haloTexture));
lensFlare.Elements.Add(new LensFlareElement(2.0f, 0.15f, 0.0f, new Color(60, 60, 255, 85), new Vector2F(0.5f, 0.5f), circleTexture));
// The scene node "KeyLight" (defined in SceneSample.InitializeDefaultXnaLights())
// is the main directional light source.
var keyLightNode = _scene.GetDescendants().First(n => n.Name == "KeyLight");
// Let's attach the lens flare to the "KeyLight" node.
// (Note: It is not necessary to attach a lens flare to a light node. Lens flares
// can be added anywhere within the scene. But attaching the lens flare to the
// light node ensures that the lens flare always has the same position and direction
// as the light source.)
var lensFlareNode = new LensFlareNode(lensFlare);
keyLightNode.Children = new SceneNodeCollection();
keyLightNode.Children.Add(lensFlareNode);
// Add a second lens flare.
// The previous lens flare was a caused by a directional light source (distance = infinite).
// This time we add a local lens flare.
lensFlare = new LensFlare(false);
lensFlare.Name = "Anamorphic Flare";
lensFlare.Size = 0.3f; // 0.3 * viewport height
// The QuerySize of a local lens flare is estimated size of the light source
// in world space.
lensFlare.QuerySize = 0.2f; // 0.2 meters
// Add some elements (glow, horizontal streaks, ...) to the lens flare effect.
var anamorphicFlareTexture = ContentManager.Load <Texture2D>("LensFlare/AnamorphicFlare");
flareTexture = new PackedTexture("AnamorphicFlare", anamorphicFlareTexture, new Vector2F(0, 0), new Vector2F(1.0f, 87f / 256f));
var flare1Texture = new PackedTexture("Flare0", anamorphicFlareTexture, new Vector2F(227f / 512f, 88f / 256f), new Vector2F(285f / 512f, 15f / 256f));
var flare2Texture = new PackedTexture("Flare1", anamorphicFlareTexture, new Vector2F(0, 87f / 256f), new Vector2F(226f / 512f, 168f / 256f));
lensFlare.Elements.Add(new LensFlareElement(0.0f, 0.8f, 0.0f, new Color(255, 255, 255, 255), new Vector2F(0.5f, 0.5f), flareTexture));
lensFlare.Elements.Add(new LensFlareElement(1.0f, new Vector2F(0.6f, 0.5f), 0.0f, new Color(172, 172, 255, 32), new Vector2F(0.5f, 0.5f), flare1Texture));
lensFlare.Elements.Add(new LensFlareElement(1.5f, 1.2f, float.NaN, new Color(200, 200, 255, 24), new Vector2F(0.5f, 0.2f), flare2Texture));
lensFlare.Elements.Add(new LensFlareElement(2.0f, 2.0f, float.NaN, new Color(172, 172, 255, 48), new Vector2F(0.5f, 0.2f), flare2Texture));
// Position the lens flare near the origin.
lensFlareNode = new LensFlareNode(lensFlare);
lensFlareNode.PoseWorld = new Pose(new Vector3(-0.5f, 1, 0));
_scene.Children.Add(lensFlareNode);
// In this example we need two renderers:
// The MeshRenderer handles MeshNodes.
_meshRenderer = new MeshRenderer();
// The LensFlareRenderer handles LensFlareNodes.
_lensFlareRenderer = new LensFlareRenderer(GraphicsService);
}
