//--------------------------------------------------------------
#region Methods
//--------------------------------------------------------------
protected override void OnLoad()
{
// Get common services and game objects.
_graphicsService = _services.GetInstance<IGraphicsService>();
var content = _services.GetInstance<ContentManager>();
var scene = _services.GetInstance<IScene>();
_simulation = _services.GetInstance<Simulation>();
var gameObjectService = _services.GetInstance<IGameObjectService>();
_cameraObject = gameObjectService.Objects.OfType<CameraObject>().First();
_previousCameraFar = _cameraObject.CameraNode.Camera.Projection.Far;
// Create a new terrain.
var terrain = new Terrain();
_terrainTile = new TerrainTile(_graphicsService)
{
CellSize = 2,
};
terrain.Tiles.Add(_terrainTile);
var shadowMapEffect = content.Load<Effect>("DigitalRune/Terrain/TerrainShadowMap");
var gBufferEffect = content.Load<Effect>("DigitalRune/Terrain/TerrainGBuffer");
var materialEffect = content.Load<Effect>("DigitalRune/Terrain/TerrainMaterial");
var material = new Material
{
{ "ShadowMap", new EffectBinding(_graphicsService, shadowMapEffect, null, EffectParameterHint.Material) },
{ "GBuffer", new EffectBinding(_graphicsService, gBufferEffect, null, EffectParameterHint.Material) },
{ "Material", new EffectBinding(_graphicsService, materialEffect, null, EffectParameterHint.Material) }
};
TerrainNode = new TerrainNode(terrain, material)
{
BaseClipmap =
{
CellsPerLevel = 128,
NumberOfLevels = 6,
},
DetailClipmap =
{
CellsPerLevel = 1364,
NumberOfLevels = 9,
},
};
scene.Children.Add(TerrainNode);
// Create a rigid body with a height field for collision detection.
var heightField = new HeightField
{
Depth = 1,
UseFastCollisionApproximation = false,
};
_rigidBody = new RigidBody(heightField, new MassFrame(), null)
{
MotionType = MotionType.Static,
UserData = _terrainTile,
};
_simulation.RigidBodies.Add(_rigidBody);
InitializeHeightsAndNormals();
InitializeClipmapCellSizes();
InitializeTerrainLayers(content);
// Enable mipmaps when using anisotropic filtering on AMD graphics cards:
//TerrainNode.DetailClipmap.EnableMipMap = true;
CreateGuiControls();
}
protected override void OnUnload()
{
_cameraObject = null;
// Remove terrain from scene.
TerrainNode.Parent.Children.Remove(TerrainNode);
TerrainNode.Dispose(false);
TerrainNode = null;
// We have to dispose the textures which were not loaded via the content manager.
_terrainTile.HeightTexture.SafeDispose();
_terrainTile.HeightTexture = null;
_terrainTile.NormalTexture.SafeDispose();
_terrainTile.NormalTexture = null;
_rigidBody.Simulation.RigidBodies.Remove(_rigidBody);
_terrainTile = null;
_rigidBody = null;
}
//--------------------------------------------------------------
#region Methods
//--------------------------------------------------------------
protected override void OnLoad()
{
// Get common services and game objects.
_graphicsService = _services.GetInstance<IGraphicsService>();
_graphicsScreen = _graphicsService.Screens.OfType<DeferredGraphicsScreen>().First();
var content = _services.GetInstance<ContentManager>();
var scene = _services.GetInstance<IScene>();
_simulation = _services.GetInstance<Simulation>();
var gameObjectService = _services.GetInstance<IGameObjectService>();
_cameraObject = gameObjectService.Objects.OfType<CameraObject>().First();
_previousCameraFar = _cameraObject.CameraNode.Camera.Projection.Far;
// Create a new terrain.
var terrain = new Terrain();
// The terrain is made up of terrain tiles which can be loaded independently.
// Each terrain tile consists of height and normal textures which define the terrain
// geometry and terrain layers which define the material (detail textures).
// In this sample we create 2x2 tiles.
_tiles = new Tile[2, 2];
for (int row = 0; row < 2; row++)
{
for (int column = 0; column < 2; column++)
{
// Create a tile and add it to the terrain.
// (The tile content is loaded later.)
var terrainTile = new TerrainTile(_graphicsService)
{
CellSize = 1, // The terrain has a resolution of 1 height sample per world space unit.
};
terrain.Tiles.Add(terrainTile);
// Create a rigid body with a height field for collision detection and add
// it to the simulation. (The height data is loaded later.)
var heightField = new HeightField
{
Depth = 1,
UseFastCollisionApproximation = false,
};
var rigidBody = new RigidBody(heightField, new MassFrame(), null)
{
MotionType = MotionType.Static,
UserData = terrainTile,
};
_simulation.RigidBodies.Add(rigidBody);
// Store the tile for use later in this sample.
_tiles[row, column] = new Tile
{
TerrainTile = terrainTile,
RigidBody = rigidBody,
};
}
}
// Create a terrain node which represents the terrain in the scene graph.
// The terrain node is rendered by the TerrainRenderer (see DeferredGraphicsScreen).
// The material used to render the terrain is customizable. The material must specify
// the effects for the different render passes which we use in the DeferredGraphicsScreen
// ("ShadowMap", "GBuffer", "Material").
// The prebuilt DigitalRune content contains standard terrain effects. However, you could
// change the effects to change how the material is rendered.
// We can create the material by loading a .drmat file. Or we can create the material in
// code like this:
var shadowMapEffect = content.Load<Effect>("DigitalRune/Terrain/TerrainShadowMap");
var gBufferEffect = content.Load<Effect>("DigitalRune/Terrain/TerrainGBuffer");
var materialEffect = content.Load<Effect>("DigitalRune/Terrain/TerrainMaterial");
var material = new Material
{
{ "ShadowMap", new EffectBinding(_graphicsService, shadowMapEffect, null, EffectParameterHint.Material) },
{ "GBuffer", new EffectBinding(_graphicsService, gBufferEffect, null, EffectParameterHint.Material) },
{ "Material", new EffectBinding(_graphicsService, materialEffect, null, EffectParameterHint.Material) }
};
TerrainNode = new TerrainNode(terrain, material)
{
// The terrain rendering uses clipmaps.
// The clipmaps are updated by the TerrainClipmapRenderer (see DeferredGraphicsScreen)
// when the camera moves.
// The base clipmap contains the basic geometry info (height, normals, hole info).
// It also determines the terrain mesh resolution.
BaseClipmap =
{
CellsPerLevel = 128,
NumberOfLevels = 6
},
// The detail clipmap contains the splatted detail textures (e.g. grass, rock, ...).
// (The max texture size in XNA is 4096x4096. That means we can fit 9 clipmap levels
// into a single texture.)
DetailClipmap =
{
CellsPerLevel = 1365,
NumberOfLevels = 9,
},
};
scene.Children.Add(TerrainNode);
// Load the height and normal maps which define the terrain geometry.
InitializeHeightsAndNormals();
// Set the clipmap cell sizes.
InitializeClipmapCellSizes();
// Create the terrain layers which define the detail textures (e.g. grass, rock, ...)
InitializeTerrainLayers(content);
// Special note for AMD GPUs:
// If we want anisotropic filtering for the terrain, then we need to enable mipmaps for
// AMD GPUs. NVIDIA and Intel can do anisotropic filtering without mipmaps.
//TerrainNode.DetailClipmap.EnableMipMap = true;
CreateGuiControls();
}
/// <summary>
/// Invalidates the specified terrain layer in the data cached by the renderer.
/// </summary>
/// <param name="tile">The terrain tile owning the terrain layer.</param>
/// <param name="layer">The terrain layer which should be invalidated.</param>
/// <inheritdoc cref="Invalidate()"/>
/// <exception cref="ArgumentNullException">
/// <paramref name="tile"/> or <paramref name="layer"/> is <see langword="null"/>.
/// </exception>
public void Invalidate(TerrainTile tile, TerrainLayer layer)
{
if (tile == null)
throw new ArgumentNullException("tile");
if (layer == null)
throw new ArgumentNullException("layer");
UpdateAabb();
Aabb aabb = layer.Aabb ?? tile.Aabb;
if (layer.Material.Contains(TerrainClipmapRenderer.RenderPassBase)
&& !RegionsContain(InvalidBaseRegions, aabb))
{
InvalidBaseRegions.Add(aabb);
// If there are 2 or more AABBs, then they need clipping.
AreInvalidBaseRegionsClipped = (InvalidBaseRegions.Count == 1);
}
if (layer.Material.Contains(TerrainClipmapRenderer.RenderPassDetail)
&& !RegionsContain(InvalidDetailRegions, aabb))
{
InvalidDetailRegions.Add(aabb);
// If there are 2 or more AABBs, then they need clipping.
AreInvalidDetailRegionsClipped = (InvalidDetailRegions.Count == 1);
}
}
/// <summary>
/// Invalidates the specified terrain tile in the data cached by the renderer.
/// </summary>
/// <param name="tile">The terrain tile which should be invalidated.</param>
/// <inheritdoc cref="Invalidate()"/>
/// <exception cref="ArgumentNullException">
/// <paramref name="tile"/> is <see langword="null"/>.
/// </exception>
public void Invalidate(TerrainTile tile)
{
if (tile == null)
throw new ArgumentNullException("tile");
UpdateAabb();
Invalidate(tile.Aabb);
}
public TerrainTextureSample(Microsoft.Xna.Framework.Game game)
: base(game)
{
SampleFramework.IsMouseVisible = false;
_graphicsScreen = new DeferredGraphicsScreen(Services);
_graphicsScreen.DrawReticle = true;
GraphicsService.Screens.Insert(0, _graphicsScreen);
GameObjectService.Objects.Add(new DeferredGraphicsOptionsObject(Services));
Services.Register(typeof(DebugRenderer), null, _graphicsScreen.DebugRenderer);
var scene = _graphicsScreen.Scene;
Services.Register(typeof(IScene), null, 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, 60);
cameraGameObject.ResetPose(new Vector3F(0, 1.8f, 0), 0, 0);
GameObjectService.Objects.Add(cameraGameObject);
_graphicsScreen.ActiveCameraNode = cameraGameObject.CameraNode;
for (int i = 0; i < 10; i++)
GameObjectService.Objects.Add(new DynamicObject(Services, 1));
GameObjectService.Objects.Add(new DynamicSkyObject(Services, true, false, true));
// Create a simple flat terrain.
var terrain = new Terrain();
_terrainTile = new TerrainTile(GraphicsService)
{
OriginX = -100,
OriginZ = -100,
CellSize = 1,
};
terrain.Tiles.Add(_terrainTile);
// Create a flat dummy height texture.
float[] heights = new float[200 * 200];
Texture2D heightTexture = null;
TerrainHelper.CreateHeightTexture(
GraphicsService.GraphicsDevice,
heights,
200,
200,
false,
ref heightTexture);
_terrainTile.HeightTexture = heightTexture;
var shadowMapEffect = ContentManager.Load<Effect>("DigitalRune/Terrain/TerrainShadowMap");
var gBufferEffect = ContentManager.Load<Effect>("DigitalRune/Terrain/TerrainGBuffer");
var materialEffect = ContentManager.Load<Effect>("DigitalRune/Terrain/TerrainMaterial");
var material = new Material
{
{ "ShadowMap", new EffectBinding(GraphicsService, shadowMapEffect, null, EffectParameterHint.Material) },
{ "GBuffer", new EffectBinding(GraphicsService, gBufferEffect, null, EffectParameterHint.Material) },
{ "Material", new EffectBinding(GraphicsService, materialEffect, null, EffectParameterHint.Material) }
};
var terrainNode = new TerrainNode(terrain, material)
{
DetailClipmap =
{
CellsPerLevel = 1364,
NumberOfLevels = 9,
EnableMipMap = true,
},
};
scene.Children.Add(terrainNode);
// Add 3 detail textures layers: gravel, rock, snow.
float detailCellSize = terrainNode.DetailClipmap.CellSizes[0];
var materialGravel = new TerrainMaterialLayer(GraphicsService)
{
DiffuseTexture = ContentManager.Load<Texture2D>("Terrain/Gravel-Diffuse"),
NormalTexture = ContentManager.Load<Texture2D>("Terrain/Gravel-Normal"),
SpecularTexture = ContentManager.Load<Texture2D>("Terrain/Gravel-Specular"),
TileSize = detailCellSize * 512,
BlendRange = 0.1f,
};
_terrainTile.Layers.Add(materialGravel);
var noiseTexture = NoiseHelper.GetNoiseTexture(GraphicsService, 128, 60);
var materialRock = new TerrainMaterialLayer(GraphicsService)
{
DiffuseTexture = ContentManager.Load<Texture2D>("Terrain/Rock-02-Diffuse"),
NormalTexture = ContentManager.Load<Texture2D>("Terrain/Rock-02-Normal"),
SpecularTexture = ContentManager.Load<Texture2D>("Terrain/Rock-02-Specular"),
HeightTexture = ContentManager.Load<Texture2D>("Terrain/Rock-02-Height"),
TileSize = detailCellSize * 1024,
DiffuseColor = new Vector3F(1 / 0.702f),
BlendTexture = noiseTexture,
BlendTextureChannel = 0,
BlendRange = 0.1f,
TerrainHeightBlendRange = 0.1f,
};
_terrainTile.Layers.Add(materialRock);
var materialSnow = new TerrainMaterialLayer(GraphicsService)
{
DiffuseTexture = ContentManager.Load<Texture2D>("Terrain/Snow-Diffuse"),
NormalTexture = ContentManager.Load<Texture2D>("Terrain/Snow-Normal"),
SpecularTexture = ContentManager.Load<Texture2D>("Terrain/Snow-Specular"),
TileSize = detailCellSize * 512,
BlendTexture = noiseTexture,
BlendTextureChannel = 1,
BlendRange = 0.1f,
};
_terrainTile.Layers.Add(materialSnow);
// Create a flat plane for collision detection.
var rigidBody = new RigidBody(new PlaneShape(), new MassFrame(), null)
{
MotionType = MotionType.Static,
};
Simulation.RigidBodies.Add(rigidBody);
CreateGuiControls();
}
