public override void Start()
{
switch (colorFormat)
{
case ColorFormat.Real:
{
videoMemory.SetBackgroundColor(ColorEncoder.Format332FromColor(BackgroundColor));
} break;
case ColorFormat.High:
{
videoMemory.SetBackgroundColor(ColorEncoder.Format565FromColor(BackgroundColor));
} break;
case ColorFormat.True:
{
videoMemory.SetBackgroundColor(ColorEncoder.Format888FromColor(BackgroundColor));
} break;
default:
break;
}
base.Start();
}
public override void writeTile(int x, int y, int w, int h, Color[] color, float[] alpha)
{
int[] tileData = ColorEncoder.encodeRGBE(color);
for (int j = 0, index = 0, pixel = x + y * width; j < h; j++, pixel += width - w)
{
for (int i = 0; i < w; i++, index++, pixel++)
{
data[pixel] = tileData[index];
}
}
}
protected override void OnUnload()
{
// Detach the scene nodes from the scene.
if (_skyGroupNode.Parent != null)
{
_skyGroupNode.Parent.Children.Remove(_skyGroupNode);
}
_lightGroupNode.Parent.Children.Remove(_lightGroupNode);
// Dispose allocated resources.
_skyGroupNode.Dispose(false);
_lightGroupNode.Dispose(false);
if (_enableClouds)
{
_cloudLayerNode0.CloudMap.Dispose();
_cloudLayerNode1.CloudMap.Dispose();
}
if (_cacheSky)
{
_sceneCaptureNode.RenderToTexture.Texture.Dispose();
_sceneCaptureNode.Dispose(false);
_cloudMapRenderer.Dispose();
_skyRenderer.Dispose();
_colorEncoder.Dispose();
_sceneCaptureRenderer.Dispose();
}
// Set references to null.
_cameraObject = null;
_skyGroupNode = null;
_lightGroupNode = null;
_milkyWayNode = null;
_starfieldNode = null;
_sunNode = null;
_moonNode = null;
_scatteringSkyNode = null;
_ambientLightNode = null;
_sunlightNode = null;
_moonlightNode = null;
_cloudLayerNode0 = null;
_cloudLayerNode1 = null;
_sceneCaptureNode = null;
SkyboxNode = null;
_cloudMapRenderer = null;
_skyRenderer = null;
_colorEncoder = null;
_sceneCaptureRenderer = null;
}
public override void writeTile(int x, int y, int w, int h, Color[] color, float[] alpha)
{
color = ColorEncoder.unlinearize(color); // gamma correction
byte[] tileData = ColorEncoder.quantizeRGBA8(color, alpha);
for (int j = 0, index = 0; j < h; j++)
{
int imageIndex = 4 * (x + (height - 1 - (y + j)) * width);
for (int i = 0; i < w; i++, index += 4, imageIndex += 4)
{
// swap bytes around so buffer is in native BGRA order
data[imageIndex + 0] = tileData[index + 2];
data[imageIndex + 1] = tileData[index + 1];
data[imageIndex + 2] = tileData[index + 0];
data[imageIndex + 3] = tileData[index + 3];
}
}
}
public override void writeTile(int x, int y, int w, int h, Color[] color, float[] alpha)
{
color = ColorEncoder.unlinearize(color); // gamma correction
byte[] tileData = ColorEncoder.quantizeRGBA8(color, alpha);
lock (data) {
for (int j = 0, index = 0; j < h; j++)
{
for (int i = 0; i < w; i++, index += 4)
{
data.SetPixel(x + i, y + j, System.Drawing.Color.FromArgb(tileData[index + 3],
tileData[index],
tileData[index + 1],
tileData[index + 2]));
}
}
}
}
private void UpdateCubeMap(TimeSpan deltaTime)
{
if (_cloudMapRenderer == null)
{
// This is the first call of UpdateCubeMap. Create the renderers which
// we need to render the cube map.
// The CloudMapRenderer creates and animates the LayeredCloudMaps.
_cloudMapRenderer = new CloudMapRenderer(_graphicsService);
// The SkyRenderer renders SkyNodes.
_skyRenderer = new SkyRenderer(_graphicsService);
// We use a ColorEncoder to encode a HDR image in a normal Color texture.
_colorEncoder = new ColorEncoder(_graphicsService)
{
SourceEncoding = ColorEncoding.Rgb,
TargetEncoding = SkyboxNode.Encoding,
};
// The SceneCaptureRenderer handles SceneCaptureNodes. We need to specify
// a render callback which is called in SceneCaptureNode.Render().
_sceneCaptureRenderer = new SceneCaptureRenderer(RenderSky);
// Normally, the render context is managed by the graphics service.
// When we call renderer outside of a GraphicsScreen, we have to use our
// own context instance.
_context = new RenderContext(_graphicsService);
}
// Update render context. For off-screen rendering we must at least update
// the time properties (e.g. for cloud animations).
_context.DeltaTime = deltaTime;
_context.Time += deltaTime;
_context.Frame++;
// Create cloud maps.
_cloudMapRenderer.Render(_skyGroupNode.Children, _context);
// Capture sky in cube map.
_sceneCaptureRenderer.Render(_sceneCaptureNode, _context);
}
/// <summary>
/// Renders the environment maps for the image-based lights.
/// </summary>
/// <remarks>
/// This method uses the current DeferredGraphicsScreen to render new environment maps at
/// runtime. The DeferredGraphicsScreen has a SceneCaptureRenderer which we can use to
/// capture environment maps of the current scene.
/// To capture new environment maps the flag _updateEnvironmentMaps must be set to true.
/// When this flag is set, SceneCaptureNodes are added to the scene. When the graphics
/// screen calls the SceneCaptureRenderer the next time, the new environment maps will be
/// captured.
/// The flag _updateEnvironmentMaps remains true until the new environment maps are available.
/// This method checks the SceneCaptureNode.LastFrame property to check if new environment maps
/// have been computed. Usually, the environment maps will be available in the next frame.
/// (However, the XNA Game class can skip graphics rendering if the game is running slowly.
/// Then we would have to wait more than 1 frame.)
/// When environment maps are being rendered, the image-based lights are disabled to capture
/// only the scene with ambient and directional lights. Dynamic objects are also disabled
/// to capture only the static scene.
/// </remarks>
private void UpdateEnvironmentMaps()
{
if (!_updateEnvironmentMaps)
{
return;
}
// One-time initializations:
if (_sceneCaptureNodes[0] == null)
{
// Create cube maps and scene capture nodes.
// (Note: A cube map size of 256 is enough for surfaces with a specular power
// in the range [0, 200000].)
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
{
var renderTargetCube = new RenderTargetCube(
GraphicsService.GraphicsDevice,
256,
true,
SurfaceFormat.Color,
DepthFormat.None);
var renderToTexture = new RenderToTexture {
Texture = renderTargetCube
};
var projection = new PerspectiveProjection();
projection.SetFieldOfView(ConstantsF.PiOver2, 1, 1, 100);
_sceneCaptureNodes[i] = new SceneCaptureNode(renderToTexture)
{
CameraNode = new CameraNode(new Camera(projection))
{
PoseWorld = _lightNodes[i].PoseWorld,
},
};
_imageBasedLights[i].Texture = renderTargetCube;
}
// We use a ColorEncoder to encode a HDR image in a normal Color texture.
_colorEncoder = new ColorEncoder(GraphicsService)
{
SourceEncoding = ColorEncoding.Rgb,
TargetEncoding = ColorEncoding.Rgbm,
};
// The SceneCaptureRenderer has a render callback which defines what is rendered
// into the scene capture render targets.
_graphicsScreen.SceneCaptureRenderer.RenderCallback = context =>
{
var graphicsDevice = GraphicsService.GraphicsDevice;
var renderTargetPool = GraphicsService.RenderTargetPool;
// Get scene nodes which are visible by the current camera.
CustomSceneQuery sceneQuery = context.Scene.Query <CustomSceneQuery>(context.CameraNode, context);
// The final image has to be rendered into this render target.
var ldrTarget = context.RenderTarget;
// Use an intermediate HDR render target with the same resolution as the final target.
var format = new RenderTargetFormat(ldrTarget)
{
SurfaceFormat = SurfaceFormat.HdrBlendable,
DepthStencilFormat = DepthFormat.Depth24Stencil8
};
var hdrTarget = renderTargetPool.Obtain2D(format);
graphicsDevice.SetRenderTarget(hdrTarget);
context.RenderTarget = hdrTarget;
// Render scene (without post-processing, without lens flares, no debug rendering, no reticle).
_graphicsScreen.RenderScene(sceneQuery, context, false, false, false, false);
// Convert the HDR image to RGBM image.
context.SourceTexture = hdrTarget;
context.RenderTarget = ldrTarget;
_colorEncoder.Process(context);
context.SourceTexture = null;
// Clean up.
renderTargetPool.Recycle(hdrTarget);
context.RenderTarget = ldrTarget;
};
}
if (_sceneCaptureNodes[0].Parent == null)
{
// Add the scene capture nodes to the scene.
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
{
_graphicsScreen.Scene.Children.Add(_sceneCaptureNodes[i]);
}
// Remember the old time stamp of the nodes.
_oldEnvironmentMapTimeStamp = _sceneCaptureNodes[0].LastFrame;
// Disable all lights except ambient and directional lights.
// We do not capture the image-based lights or any other lights (e.g. point lights)
// in the cube map.
foreach (var lightNode in _graphicsScreen.Scene.GetDescendants().OfType <LightNode>())
{
lightNode.IsEnabled = (lightNode.Light is AmbientLight) || (lightNode.Light is DirectionalLight);
}
// Disable dynamic objects.
foreach (var node in _graphicsScreen.Scene.GetDescendants())
{
if (node is MeshNode || node is LodGroupNode)
{
if (!node.IsStatic)
{
node.IsEnabled = false;
}
}
}
}
else
{
// The scene capture nodes are part of the scene. Check if they have been
// updated.
if (_sceneCaptureNodes[0].LastFrame != _oldEnvironmentMapTimeStamp)
{
// We have new environment maps. Restore the normal scene.
for (int i = 0; i < _sceneCaptureNodes.Length; i++)
{
_graphicsScreen.Scene.Children.Remove(_sceneCaptureNodes[i]);
}
_updateEnvironmentMaps = false;
foreach (var lightNode in _graphicsScreen.Scene.GetDescendants().OfType <LightNode>())
{
lightNode.IsEnabled = true;
}
foreach (var node in _graphicsScreen.Scene.GetDescendants())
{
if (node is MeshNode || node is LodGroupNode)
{
if (!node.IsStatic)
{
node.IsEnabled = true;
}
}
}
}
}
}
public LdrSkySample(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);
var spriteFont = UIContentManager.Load <SpriteFont>("UI Themes/BlendBlue/Default");
_debugRenderer = new DebugRenderer(GraphicsService, spriteFont);
_cieSkyFilter = new CieSkyFilter(GraphicsService);
_cieSkyFilter.Exposure = 5;
_cieSkyFilter.Strength = 0.9f;
_gradientSky = new GradientSkyNode();
//_gradientSky.GroundColor = new Vector4F(0, 0, 1, 1);
//_gradientSky.ZenithColor = new Vector4F(0, 0, 1, 1);
//_gradientSky.FrontColor = new Vector4F(0, 0, 1, 1);
//_gradientSky.BackColor = new Vector4F(0, 0, 1, 1);
//_gradientSky.FrontZenithShift = 0.3f;
//_gradientSky.FrontGroundShift = 0.1f;
//_gradientSky.BackGroundShift = 0.1f;
_gradientSky.CieSkyStrength = 0;
_gradientTextureSky = new GradientTextureSkyNode();
_gradientTextureSky.TimeOfDay = _time.TimeOfDay;
_gradientTextureSky.Color = new Vector4F(1);
_gradientTextureSky.FrontTexture = ContentManager.Load <Texture2D>("Sky/GradientSkyFront");
_gradientTextureSky.BackTexture = ContentManager.Load <Texture2D>("Sky/GradientSkyBack");
_gradientTextureSky.CieSkyStrength = 1;
_scatteringSky = new ScatteringSkyNode();
_scatteringSky.SunIntensity *= 2;
_scatteringSky.BetaMie *= 2;
_scatteringSky.GMie = 0.75f;
_scatteringSky.ScaleHeight = _scatteringSky.AtmosphereHeight * 0.25f;
InitializeStarfield();
_cloudMapRenderer = new CloudMapRenderer(GraphicsService);
_skyRenderer = new SkyRenderer(GraphicsService);
_milkyWay = ContentManager.Load <TextureCube>("Sky/MilkyWay");
_milkyWaySkybox = new SkyboxNode(_milkyWay)
{
Color = new Vector3F(0.05f)
};
_sun = new SkyObjectNode
{
GlowColor0 = new Vector3F(1, 1, 1) * 5,
GlowExponent0 = 4000,
//GlowColor1 = new Vector3F(0.4f) * 0.1f,
//GlowExponent1 = 100
};
_moon = new SkyObjectNode
{
Texture = new PackedTexture(ContentManager.Load <Texture2D>("Sky/Moon")),
SunLight = new Vector3F(1, 1, 1) * 1,
AmbientLight = new Vector3F(0.001f) * 1,
LightWrap = 0.1f,
LightSmoothness = 1,
AngularDiameter = new Vector2F(MathHelper.ToRadians(5)),
GlowColor0 = new Vector3F(0.005f * 0),
GlowCutoffThreshold = 0.001f,
GlowExponent0 = 100
};
var cloudMap = new LayeredCloudMap
{
Density = 10,
Coverage = 0.5f,
Size = 1024,
};
var scale = CreateScale(0.2f);
cloudMap.Layers[0] = new CloudMapLayer(null, scale * CreateScale(1), -0.5f, 1, 0.011f * 0);
cloudMap.Layers[1] = new CloudMapLayer(null, scale * CreateScale(1.7f), -0.5f, 1f / 2f, 0.017f * 0);
cloudMap.Layers[2] = new CloudMapLayer(null, scale * CreateScale(3.97f), -0.5f, 1f / 4f, 0.033f * 0);
cloudMap.Layers[3] = new CloudMapLayer(null, scale * CreateScale(8.1f), -0.5f, 1f / 8f, 0.043f * 0);
cloudMap.Layers[4] = new CloudMapLayer(null, scale * CreateScale(16, 17), -0.5f, 1f / 16f, 0.051f * 0);
cloudMap.Layers[5] = new CloudMapLayer(null, scale * CreateScale(32, 31), -0.5f, 1f / 32f, 0.059f * 0);
cloudMap.Layers[6] = new CloudMapLayer(null, scale * CreateScale(64, 67), -0.5f, 1f / 64f, 0.067f * 0);
cloudMap.Layers[7] = new CloudMapLayer(null, scale * CreateScale(128, 127), -0.5f, 1f / 128f, 0.081f * 0);
_cloudLayerNode = new CloudLayerNode(cloudMap)
{
ForwardScatterScale = 2.5f,
ForwardScatterOffset = 0.3f,
TextureMatrix = CreateScale(0.5f),
SkyCurvature = 0.9f,
NumberOfSamples = 16,
};
_ephemeris = new Ephemeris();
// Approx. location of Ternberg: Latitude = 48, Longitude = 15, Altitude = 300
_ephemeris.Latitude = 0;
_ephemeris.Longitude = 15;
_ephemeris.Altitude = 300;
#if XBOX
//_time = new DateTime(2013, 5, 1, 17, 17, 0, 0);
_time = DateTime.Now;
#else
_time = new DateTimeOffset(2013, 5, 1, 12, 0, 0, 0, TimeSpan.Zero);
//_time = DateTimeOffset.UtcNow;
#endif
UpdateEphemeris();
_milkyWaySkybox.DrawOrder = 0;
_starfield.DrawOrder = 1;
_sun.DrawOrder = 2;
_moon.DrawOrder = 3;
_scatteringSky.DrawOrder = 4;
_gradientSky.DrawOrder = 4;
_gradientTextureSky.DrawOrder = 4;
_cloudLayerNode.DrawOrder = 5;
_skyNodes = new SceneNode[]
{
_milkyWaySkybox,
_starfield,
_sun,
_moon,
_scatteringSky,
//_gradientSky,
//_gradientTextureSky,
_cloudLayerNode,
};
var graphicsDevice = GraphicsService.GraphicsDevice;
_skybox = new SkyboxNode(
new RenderTargetCube(graphicsDevice, 512, false, SurfaceFormat.Color, DepthFormat.None))
{
Encoding = ColorEncoding.Rgbm,
};
_hdrFilter = new HdrFilter(GraphicsService)
{
MinExposure = 0.5f,
MaxExposure = 2,
BloomIntensity = 1,
BloomThreshold = 0.6f,
AdaptionSpeed = 100,
};
_colorEncoder = new ColorEncoder(GraphicsService)
{
SourceEncoding = ColorEncoding.Rgb,
TargetEncoding = _skybox.Encoding,
};
}
private void UpdateCubeMap(TimeSpan deltaTime)
{
if (_cloudMapRenderer == null)
{
// This is the first call of UpdateCubeMap. Create the renderers which
// we need to render the cube map.
// The CloudMapRenderer creates and animates the LayeredCloudMaps.
_cloudMapRenderer = new CloudMapRenderer(_graphicsService);
// The SkyRenderer renders SkyNodes.
_skyRenderer = new SkyRenderer(_graphicsService);
// We use a ColorEncoder to encode a HDR image in a normal Color texture.
_colorEncoder = new ColorEncoder(_graphicsService)
{
SourceEncoding = ColorEncoding.Rgb,
TargetEncoding = SkyboxNode.Encoding,
};
// The SceneCaptureRenderer handles SceneCaptureNodes. We need to specify
// a delegate which is called in SceneCaptureNode.Render().
_sceneCaptureRenderer = new SceneCaptureRenderer(context =>
{
var graphicsDevice = _graphicsService.GraphicsDevice;
var renderTargetPool = _graphicsService.RenderTargetPool;
// We have to render into this render target.
var ldrTarget = context.RenderTarget;
// Reset render states.
graphicsDevice.BlendState = BlendState.Opaque;
graphicsDevice.DepthStencilState = DepthStencilState.Default;
graphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
// Use an intermediate HDR render target with the same resolution as the final target.
var format = new RenderTargetFormat(ldrTarget)
{
SurfaceFormat = SurfaceFormat.HdrBlendable,
DepthStencilFormat = DepthFormat.Depth24Stencil8
};
var hdrTarget = renderTargetPool.Obtain2D(format);
graphicsDevice.SetRenderTarget(hdrTarget);
context.RenderTarget = hdrTarget;
graphicsDevice.Clear(Color.Black);
// Render the sky.
_skyRenderer.Render(_skyGroupNode.Children, context);
// Convert the HDR image to RGBM image.
context.SourceTexture = hdrTarget;
context.RenderTarget = ldrTarget;
_colorEncoder.Process(context);
context.SourceTexture = null;
// Clean up.
renderTargetPool.Recycle(hdrTarget);
context.RenderTarget = ldrTarget;
});
// Normally, the render context is managed by the graphics service.
// When we call renderer outside of a GraphicsScreen, we have to use our
// own context instance.
_context = new RenderContext(_graphicsService);
}
// Update render context.
// Frame needs to be updated to tell the renderers that this is a new "frame".
// (Otherwise, they might abort early to avoid duplicate work in the same frame.)
_context.Frame++;
// DeltaTime is relevant for renderers such as the CloudMapRenderer because it
// might have to animate the clouds.
_context.DeltaTime = deltaTime;
// Create cloud maps.
_cloudMapRenderer.Render(_skyGroupNode.Children, _context);
// Capture sky in cube map.
_sceneCaptureRenderer.Render(_sceneCaptureNode, _context);
}
