private static void ResetMaterialId(EffectBinding materialBinding)
{
Debug.Assert(
materialBinding.MaterialBinding == null,
"The specified binding needs to be a material binding, not a material instance binding.");
materialBinding.Id = 0;
}
private static bool UpdateAndApplyParameter<T>(EffectBinding effectBinding, string name, T value, RenderContext context)
{
var parameterBinding = effectBinding.ParameterBindings[name] as ConstParameterBinding<T>;
if (parameterBinding != null)
{
parameterBinding.Value = value;
parameterBinding.Update(context);
parameterBinding.Apply(context);
return true;
}
return false;
}
private static uint GetMaterialId(EffectBinding materialInstanceBinding)
{
Debug.Assert(
materialInstanceBinding.MaterialBinding != null,
"The specified binding is not a material instance binding.");
var materialBinding = materialInstanceBinding.MaterialBinding;
if (materialBinding.Id == 0)
{
var effectEx = materialBinding.EffectEx;
effectEx.BindingCount++;
materialBinding.Id = effectEx.BindingCount;
}
return materialBinding.Id;
}
/// <summary>
/// Initializes a new instance of the <see cref="TerrainClearLayer"/> class.
/// </summary>
/// <param name="graphicService">The graphic service.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicService"/> is <see langword="null"/>.
/// </exception>
public TerrainClearLayer(IGraphicsService graphicService)
{
if (graphicService == null)
{
throw new ArgumentNullException("graphicService");
}
var effect = graphicService.Content.Load <Effect>("DigitalRune/Terrain/TerrainClearLayer");
var effectBinding = new EffectBinding(graphicService, effect, null, EffectParameterHint.Material);
Material = new Material
{
{ "Base", effectBinding },
{ "Detail", effectBinding }
};
MaterialInstance = new MaterialInstance(Material);
}
/// <summary>
/// Gets the material key for sorting draw jobs.
/// </summary>
/// <param name="materialInstanceBinding">The effect binding of a material instance.</param>
/// <returns>The material key.</returns>
private uint GetMaterialKey(EffectBinding materialInstanceBinding)
{
Debug.Assert(
materialInstanceBinding.MaterialBinding != null,
"The specified binding is not a material instance binding.");
// ----------------------------------------------------
// | effect ID | material ID | technique ID |
// | 12 bit | 12 bit | 8 bit |
// ----------------------------------------------------
uint effectId = GetEffectId(materialInstanceBinding.EffectEx);
uint materialId = GetMaterialId(materialInstanceBinding);
byte techniqueId = materialInstanceBinding.TechniqueBinding.Id;
Debug.Assert(effectId <= 0xfff, "Max number of effect per render call exceeded.");
Debug.Assert(materialId <= 0xfff, "Max number of materials per render call exceeded.");
Debug.Assert(techniqueId <= 0xff, "Max number of techniques per render call exceeded.");
return (effectId & 0xfff) << 20
| (materialId & 0xfff) << 8
| techniqueId;
}
private void ProcessJobs(RenderContext context, RenderOrder order)
{
Effect currentEffect = null;
EffectEx currentEffectEx = null;
EffectBinding currentMaterialBinding = null;
// Set render states for drawing decals.
var graphicsDevice = context.GraphicsService.GraphicsDevice;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
graphicsDevice.DepthStencilState = DepthStencilState.DepthRead;
graphicsDevice.RasterizerState = RasterizerState.CullCounterClockwise;
if (!ClipAtNearPlane)
{
// Cache some info for near plane intersection tests.
var cameraNode = context.CameraNode;
var cameraPose = cameraNode.PoseWorld;
var projection = cameraNode.Camera.Projection;
// Get min and max of near plane AABB in view space.
var min = new Vector3(projection.Left, projection.Bottom, -projection.Near);
var max = new Vector3(projection.Right, projection.Top, -projection.Near);
// Convert min and max to world space.
min = cameraPose.ToWorldPosition(min);
max = cameraPose.ToWorldPosition(max);
// Get world space aabb
_cameraNearPlaneAabbWorld = new Aabb(Vector3.Min(min, max), Vector3.Max(min, max));
}
// The BlendState is set below.
bool isGBufferPass = string.Equals(context.RenderPass, "GBuffer", StringComparison.OrdinalIgnoreCase); // InvariantCultureIgnoreCase would be better but is not available in WindowsStore.
var blendState = isGBufferPass ? GBufferBlendState : BlendState.AlphaBlend;
int index = 0;
var jobs = _jobs.Array;
int jobCount = _jobs.Count;
while (index < jobCount)
{
// Update BlendState. (Needs to be done for each batch because decals can
// change the blend mode in the material. For example, alpha-tested decals
// can disable alpha blending.)
graphicsDevice.BlendState = blendState;
uint materialKey = jobs[index].MaterialKey;
var materialInstanceBinding = jobs[index].MaterialInstanceBinding;
var materialBinding = materialInstanceBinding.MaterialBinding;
var effectEx = materialBinding.EffectEx;
Debug.Assert(effectEx != null, "EffectEx must not be null.");
context.MaterialBinding = materialBinding;
context.MaterialInstanceBinding = materialInstanceBinding;
if (currentEffectEx != effectEx)
{
// ----- Next effect.
currentEffectEx = effectEx;
currentEffect = effectEx.Resource;
// Reset ID. (Only used during state sorting.)
ResetEffectId(effectEx);
// Update and apply global bindings.
foreach (var binding in currentEffectEx.ParameterBindings)
{
if (binding.Description.Hint == EffectParameterHint.Global)
{
binding.Update(context);
binding.Apply(context);
}
}
}
if (currentMaterialBinding != materialBinding)
{
// ----- Next material.
currentMaterialBinding = materialBinding;
// Reset ID. (Only used during state sorting.)
ResetMaterialId(materialBinding);
// Update and apply material bindings.
foreach (var binding in currentMaterialBinding.ParameterBindings)
{
binding.Update(context);
binding.Apply(context);
// In "GBuffer" pass the specular power is written to the alpha channel.
// The specular power needs to be set as the BlendFactor. (See GBufferBlendState.)
if (isGBufferPass && binding.Description.Semantic == DefaultEffectParameterSemantics.SpecularPower)
{
var specularPowerBinding = binding as EffectParameterBinding<float>;
if (specularPowerBinding != null)
{
// Note: Specular power is currently encoded using log2 - see Deferred.fxh.
// (Blending encoded values is mathematically not correct, but there are no
// rules for blending specular powers anyway.)
float specularPower = specularPowerBinding.Value;
int encodedSpecularPower = (byte)((float)Math.Log(specularPower + 0.0001f, 2) / 17.6f * 255.0f);
graphicsDevice.BlendFactor = new Color(255, 255, 255, encodedSpecularPower);
}
}
}
}
// Note: EffectTechniqueBinding only returns the EffectTechnique, but does
// not set it as the current technique.
var techniqueBinding = materialInstanceBinding.TechniqueBinding;
var technique = techniqueBinding.GetTechnique(currentEffect, context);
// See if there is an associated technique that supports hardware instancing.
//var instancingTechnique = (EffectTechnique)null;
//var techniqueDescription = currentEffectEx.TechniqueDescriptions[technique];
//if (techniqueDescription != null)
// instancingTechnique = techniqueDescription.InstancingTechnique;
//if (EnableInstancing && instancingTechnique != null)
//{
// // ----- Instancing
// // Render all decals that share the same effect/material and batch instances
// // into a single draw call.
// int count = 1;
// while (index + count < jobCount && jobs[index + count].MaterialKey == materialKey)
// count++;
// if (count >= InstancingThreshold)
// {
// // Draw decals using instancing.
// currentEffect.CurrentTechnique = instancingTechnique;
// var passBinding = techniqueBinding.GetPassBinding(instancingTechnique, context);
// DrawInstanced(ref passBinding, context, index, count);
// index += count;
// }
// else
// {
// // Draw decals without instancing.
// currentEffect.CurrentTechnique = technique;
// var passBinding = techniqueBinding.GetPassBinding(technique, context);
// Draw(ref passBinding, context, index, count, order);
// index += count;
// }
//}
//else
{
// ----- No instancing
// Render all decals that share the same effect/material.
int count = 1;
while (index + count < jobCount && jobs[index + count].MaterialKey == materialKey)
count++;
currentEffect.CurrentTechnique = technique;
var passBinding = techniqueBinding.GetPassBinding(technique, context);
Draw(ref passBinding, context, index, count, order);
index += count;
}
}
context.MaterialBinding = null;
context.MaterialInstanceBinding = null;
savedRenderState.Restore();
}
/// <summary>
/// Creates a graphics mesh with the triangle mesh data of the given shape and the given
/// diffuse and specular material properties.
/// </summary>
/// <param name="contentManager">The contentManager manager.</param>
/// <param name="graphicsService">The graphics service.</param>
/// <param name="submesh">The submesh.</param>
/// <param name="diffuse">The diffuse material color.</param>
/// <param name="specular">The specular material color.</param>
/// <param name="specularPower">The specular power of the material.</param>
/// <returns>The graphics mesh.</returns>
/// <remarks>
/// This method does not set the bounding shape of the mesh. (The default is an infinite shape
/// which is not optimal for performance.)
/// </remarks>
public static Mesh CreateMesh(ContentManager contentManager, IGraphicsService graphicsService, Submesh submesh,
Vector3 diffuse, Vector3 specular, float specularPower)
{
Mesh mesh = new Mesh();
mesh.Submeshes.Add(submesh);
// Build material.
// We could load a predefined material (*.drmat file)
// with the content manager.
//var material = contentManager.Load<Material>("MyMaterialName");
// Alternatively, we can load some effects and build the material here:
Material material = new Material();
// We need an EffectBinding for each render pass.
// The "Default" pass uses a BasicEffectBinding (which is an EffectBinding
// for the XNA BasicEffect).
// Note: The "Default" pass is not used by the DeferredLightingScreen, so
// we could ignore this pass in this sample project.
BasicEffectBinding defaultEffectBinding = new BasicEffectBinding(graphicsService, null)
{
LightingEnabled = true,
TextureEnabled = true,
VertexColorEnabled = false
};
defaultEffectBinding.Set("Texture", graphicsService.GetDefaultTexture2DWhite());
defaultEffectBinding.Set("DiffuseColor", new Vector4((Vector3)diffuse, 1));
defaultEffectBinding.Set("SpecularColor", (Vector3)specular);
defaultEffectBinding.Set("SpecularPower", specularPower);
material.Add("Default", defaultEffectBinding);
// EffectBinding for the "ShadowMap" pass.
// Note: EffectBindings which are used in a Material must be marked with
// the EffectParameterHint Material.
EffectBinding shadowMapEffectBinding = new EffectBinding(
graphicsService,
contentManager.Load <Effect>("DigitalRune\\Materials\\ShadowMap"),
null,
EffectParameterHint.Material);
material.Add("ShadowMap", shadowMapEffectBinding);
// EffectBinding for the "GBuffer" pass.
EffectBinding gBufferEffectBinding = new EffectBinding(
graphicsService,
contentManager.Load <Effect>("DigitalRune\\Materials\\GBuffer"),
null,
EffectParameterHint.Material);
gBufferEffectBinding.Set("SpecularPower", specularPower);
material.Add("GBuffer", gBufferEffectBinding);
// EffectBinding for the "Material" pass.
EffectBinding materialEffectBinding = new EffectBinding(
graphicsService,
contentManager.Load <Effect>("DigitalRune\\Materials\\Material"),
null,
EffectParameterHint.Material);
materialEffectBinding.Set("DiffuseTexture", graphicsService.GetDefaultTexture2DWhite());
materialEffectBinding.Set("DiffuseColor", (Vector3)diffuse);
materialEffectBinding.Set("SpecularColor", (Vector3)specular);
material.Add("Material", materialEffectBinding);
// Assign this material to the submesh.
submesh.SetMaterial(material);
return(mesh);
}
bool IDictionary <string, EffectBinding> .TryGetValue(string key, out EffectBinding value)
{
return(_bindingsPerPass.TryGetValue(key, out value));
}
private void ProcessLayer(GraphicsDevice graphicsDevice, RenderContext context, TerrainClipmap clipmap, bool isBaseClipmap, IInternalTerrainLayer layer, Aabb tileAabb)
{
// The material needs to have a "Base" or "Detail" render pass.
if (!layer.Material.Contains(context.RenderPass))
{
return;
}
var layerAabb = layer.Aabb ?? tileAabb;
//if (!HaveContactXZ(ref layerAabb, ref clipmap.Aabb))
// continue;
bool isInInvalidRegion = false;
for (int level = clipmap.NumberOfLevels - 1; level >= 0; level--)
{
for (int i = 0; i < clipmap.InvalidRegions[level].Count; i++)
{
var aabb = clipmap.InvalidRegions[level][i];
if (HaveContactXZ(ref layerAabb, ref aabb))
{
isInInvalidRegion = true;
break;
}
}
if (isInInvalidRegion)
{
break;
}
}
if (!isInInvalidRegion)
{
return;
}
// Reset render state for each layer because layers are allowed to change render state
// without restoring it in a restore pass.
// The base clipmap uses no blending. The detail clipmap uses alpha-blending (but only in
// RGB, A is not changed, A is used e.g. for hole info).
graphicsDevice.BlendState = isBaseClipmap ? BlendState.Opaque : BlendStateAlphaBlendRgb;
graphicsDevice.RasterizerState = RasterizerStateCullNoneWithScissorTest;
graphicsDevice.DepthStencilState = DepthStencilState.None;
// Get the EffectBindings and the Effect for the current render pass.
EffectBinding materialInstanceBinding = layer.MaterialInstance[context.RenderPass];
EffectBinding materialBinding = layer.Material[context.RenderPass];
EffectEx effectEx = materialBinding.EffectEx;
Effect effect = materialBinding.Effect;
context.MaterialInstanceBinding = materialInstanceBinding;
context.MaterialBinding = materialBinding;
if (effectEx.Id == 0)
{
effectEx.Id = 1;
// Update and apply global effect parameter bindings - these bindings set the
// effect parameter values for "global" parameters. For example, if an effect uses
// a "ViewProjection" parameter, then a binding will compute this matrix from the
// current CameraInstance in the render context and update the effect parameter.
foreach (var binding in effect.GetParameterBindings())
{
if (binding.Description.Hint == EffectParameterHint.Global)
{
binding.Update(context);
binding.Apply(context);
}
}
}
// Update and apply material bindings.
// If this material is the same as in the last ProcessLayer() call, then we can skip this.
if (_previousMaterialBinding != materialBinding)
{
_previousMaterialBinding = materialBinding;
if (materialBinding.Id == 0)
{
materialBinding.Id = 1;
foreach (var binding in materialBinding.ParameterBindings)
{
binding.Update(context);
binding.Apply(context);
}
}
else
{
// The material has already been updated in this frame.
foreach (var binding in materialBinding.ParameterBindings)
{
binding.Apply(context);
}
}
}
// Update and apply local, per-instance, and per-pass bindings - these are bindings
// for parameters, like the "World" matrix or lighting parameters.
foreach (var binding in materialInstanceBinding.ParameterBindings)
{
if (binding.Description.Hint != EffectParameterHint.PerPass)
{
binding.Update(context);
binding.Apply(context);
}
}
// Select and apply technique.
var techniqueBinding = materialInstanceBinding.TechniqueBinding;
techniqueBinding.Update(context);
var technique = techniqueBinding.GetTechnique(effect, context);
effect.CurrentTechnique = technique;
int border = isBaseClipmap ? 0 : Border;
// Region covered by the layer.
Vector2F layerStart = new Vector2F(layerAabb.Minimum.X, layerAabb.Minimum.Z);
Vector2F layerEnd = new Vector2F(layerAabb.Maximum.X, layerAabb.Maximum.Z);
// Clamp to tile AABB
layerStart.X = Math.Max(layerStart.X, tileAabb.Minimum.X);
layerStart.Y = Math.Max(layerStart.Y, tileAabb.Minimum.Z);
layerEnd.X = Math.Min(layerEnd.X, tileAabb.Maximum.X);
layerEnd.Y = Math.Min(layerEnd.Y, tileAabb.Maximum.Z);
// Loop over clipmap levels.
for (int level = 0; level < clipmap.NumberOfLevels; level++)
{
// If there are no invalid regions, the combined AABB is NaN.
if (Numeric.IsNaN(clipmap.CombinedInvalidRegionsAabbs[level].Minimum.X))
{
continue;
}
if (layer.FadeInStart > level || layer.FadeOutEnd <= level)
{
continue;
}
if (!HaveContactXZ(ref layerAabb, ref clipmap.CombinedInvalidRegionsAabbs[level]))
{
continue;
}
Vector2F levelOrigin = clipmap.Origins[level];
Vector2F levelSize = new Vector2F(clipmap.LevelSizes[level]); // without border!
Vector2F levelEnd = levelOrigin + levelSize;
float cellsPerLevelWithoutBorder = clipmap.CellsPerLevel - 2 * border;
float cellSize = clipmap.ActualCellSizes[level];
float texelsPerUnit = 1 / cellSize;
// Following effect parameters change per clipmap level:
UpdateAndApplyParameter(materialBinding, "TerrainClipmapLevel", (float)level, context);
UpdateAndApplyParameter(materialBinding, "TerrainClipmapCellSize", cellSize, context);
// The rectangle of the whole clipmap level (including border).
var levelRect = GetScreenSpaceRectangle(clipmap, level);
// The pixel position of the offset.
int offsetX = levelRect.X + border + (int)(cellsPerLevelWithoutBorder * clipmap.Offsets[level].X + 0.5f);
int offsetY = levelRect.Y + border + (int)(cellsPerLevelWithoutBorder * clipmap.Offsets[level].Y + 0.5f);
// Handle the 4 rectangles of the toroidally wrapped clipmap.
bool applyPass = true;
for (int i = 0; i < 4; i++)
{
Rectangle quadrantRect;
Vector2F offsetPosition;
switch (i)
{
case 0:
// Top left rectangle.
quadrantRect = new Rectangle(levelRect.X, levelRect.Y, offsetX - levelRect.X, offsetY - levelRect.Y);
offsetPosition = levelEnd;
break;
case 1:
// Top right rectangle.
quadrantRect = new Rectangle(offsetX, levelRect.Y, levelRect.Right - offsetX, offsetY - levelRect.Y);
offsetPosition.X = levelOrigin.X;
offsetPosition.Y = levelEnd.Y;
break;
case 2:
// Bottom left rectangle.
quadrantRect = new Rectangle(levelRect.X, offsetY, offsetX - levelRect.X, levelRect.Bottom - offsetY);
offsetPosition.X = levelEnd.X;
offsetPosition.Y = levelOrigin.Y;
break;
default:
// Bottom right rectangle.
quadrantRect = new Rectangle(offsetX, offsetY, levelRect.Right - offsetX, levelRect.Bottom - offsetY);
offsetPosition = levelOrigin;
break;
}
if (quadrantRect.Width == 0 || quadrantRect.Height == 0)
{
continue;
}
applyPass |= UpdateAndApplyParameter(materialBinding, "TerrainClipmapOffsetWorld", (Vector2)offsetPosition, context);
applyPass |= UpdateAndApplyParameter(materialBinding, "TerrainClipmapOffsetScreen", new Vector2(offsetX, offsetY), context);
var passBinding = techniqueBinding.GetPassBinding(technique, context);
foreach (var pass in passBinding)
{
// Update and apply per-pass bindings.
foreach (var binding in materialInstanceBinding.ParameterBindings)
{
if (binding.Description.Hint == EffectParameterHint.PerPass)
{
binding.Update(context);
binding.Apply(context);
applyPass = true;
}
}
if (applyPass)
{
pass.Apply();
applyPass = false;
}
foreach (var aabb in clipmap.InvalidRegions[level])
{
// Intersect layer AABB with invalid region AABB.
Vector2F clippedLayerStart, clippedLayerEnd;
clippedLayerStart.X = Math.Max(layerStart.X, aabb.Minimum.X);
clippedLayerStart.Y = Math.Max(layerStart.Y, aabb.Minimum.Z);
clippedLayerEnd.X = Math.Min(layerEnd.X, aabb.Maximum.X);
clippedLayerEnd.Y = Math.Min(layerEnd.Y, aabb.Maximum.Z);
// Nothing to do if layer AABB does not intersect invalid region.
if (clippedLayerStart.X >= clippedLayerEnd.X || clippedLayerStart.Y >= clippedLayerEnd.Y)
{
continue;
}
// Compute screen space rectangle of intersection (relative to toroidal offset).
var invalidRect = GetScissorRectangle(
clippedLayerStart - offsetPosition,
clippedLayerEnd - clippedLayerStart,
texelsPerUnit);
// Add toroidal offset screen position.
invalidRect.X += offsetX;
invalidRect.Y += offsetY;
// Set a scissor rectangle to avoid drawing outside the current toroidal wrap
// part and outside the invalid region.
var scissorRect = Rectangle.Intersect(quadrantRect, invalidRect);
if (scissorRect.Width <= 0 || scissorRect.Height <= 0)
{
continue;
}
graphicsDevice.ScissorRectangle = scissorRect;
// Compute world space position of scissor rectangle corners.
Vector2F start, end;
start.X = offsetPosition.X + (scissorRect.X - offsetX) * cellSize;
start.Y = offsetPosition.Y + (scissorRect.Y - offsetY) * cellSize;
end.X = offsetPosition.X + (scissorRect.Right - offsetX) * cellSize;
end.Y = offsetPosition.Y + (scissorRect.Bottom - offsetY) * cellSize;
Debug.Assert(Numeric.IsLessOrEqual(start.X, end.X));
Debug.Assert(Numeric.IsLessOrEqual(start.Y, end.Y));
layer.OnDraw(graphicsDevice, scissorRect, start, end);
}
}
}
}
}
private void ProcessClipmap(TerrainNode node, TerrainClipmap clipmap, RenderContext context)
{
var graphicsDevice = context.GraphicsService.GraphicsDevice;
var lodCameraNode = context.LodCameraNode ?? context.CameraNode;
bool isBaseClipmap = (node.BaseClipmap == clipmap);
// Update the clipmap render targets if necessary.
InitializeClipmapTextures(graphicsDevice, clipmap);
// Update other clipmap data (origins, offsets, ...). No rendering.
// (Data is stored in TerrainClipmap class.)
UpdateClipmapData(node, clipmap, lodCameraNode, isBaseClipmap);
// Compute which rectangular regions need to be updated.
// (Data is stored in TerrainClipmap class.)
ComputeInvalidRegions(node, clipmap, isBaseClipmap);
// Abort if there are no invalid regions.
int numberOfInvalidRegions = 0;
for (int level = 0; level < clipmap.NumberOfLevels; level++)
{
numberOfInvalidRegions += clipmap.InvalidRegions[level].Count;
}
Debug.Assert(numberOfInvalidRegions > 0 || clipmap.UseIncrementalUpdate,
"If the clipmap update is not incremental, there must be at least one invalid region.");
if (numberOfInvalidRegions == 0)
{
return;
}
// Set render target binding to render into all clipmap textures at once.
int numberOfTextures = clipmap.Textures.Length;
if (_renderTargetBindings[numberOfTextures] == null)
{
_renderTargetBindings[numberOfTextures] = new RenderTargetBinding[numberOfTextures];
}
for (int i = 0; i < numberOfTextures; i++)
{
_renderTargetBindings[numberOfTextures][i] = new RenderTargetBinding((RenderTarget2D)clipmap.Textures[i]);
}
switch (numberOfTextures)
{
case 1: context.Technique = "RenderTargets1"; break;
case 2: context.Technique = "RenderTargets2"; break;
case 3: context.Technique = "RenderTargets3"; break;
case 4: context.Technique = "RenderTargets4"; break;
default: context.Technique = null; break;
}
graphicsDevice.SetRenderTargets(_renderTargetBindings[numberOfTextures]);
// The viewport covers the whole texture atlas.
var viewport = graphicsDevice.Viewport;
context.Viewport = viewport;
Debug.Assert(_previousMaterialBinding == null);
// Loop over all layers. Render each layer into all levels (if there is an invalid region).
Aabb tileAabb = new Aabb(new Vector3(-Terrain.TerrainLimit), new Vector3(Terrain.TerrainLimit));
ProcessLayer(graphicsDevice, context, clipmap, isBaseClipmap, _clearLayer, tileAabb);
foreach (var tile in node.Terrain.Tiles)
{
tileAabb = tile.Aabb;
context.Object = tile;
ProcessLayer(graphicsDevice, context, clipmap, isBaseClipmap, tile, tileAabb);
foreach (var layer in tile.Layers)
{
ProcessLayer(graphicsDevice, context, clipmap, isBaseClipmap, layer, tileAabb);
}
context.Object = null;
}
_previousMaterialBinding = null;
ClearFlags(_clearLayer, context);
foreach (var tile in node.Terrain.Tiles)
{
ClearFlags(tile, context);
foreach (var layer in tile.Layers)
{
ClearFlags(layer, context);
}
}
// All invalid regions handled.
for (int i = 0; i < clipmap.NumberOfLevels; i++)
{
clipmap.InvalidRegions[i].Clear();
}
// The next time we can update incrementally.
clipmap.UseIncrementalUpdate = true;
}
/// <summary>
/// Initializes a new instance of the <see cref="EffectPostProcessor"/> class.
/// </summary>
/// <param name="graphicsService">The graphics service.</param>
/// <param name="effect">The effect.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="graphicsService"/> or <paramref name="effect"/> is <see langword="null"/>.
/// </exception>
public EffectPostProcessor(IGraphicsService graphicsService, Effect effect)
: base(graphicsService)
{
EffectBinding = new EffectBinding(graphicsService, effect);
}
public override void Render(IList <SceneNode> nodes, RenderContext context, RenderOrder order)
{
ThrowIfDisposed();
if (nodes == null)
{
throw new ArgumentNullException("nodes");
}
if (context == null)
{
throw new ArgumentNullException("context");
}
int numberOfNodes = nodes.Count;
if (numberOfNodes == 0)
{
return;
}
context.ThrowIfCameraMissing();
context.ThrowIfRenderPassMissing();
var graphicsService = context.GraphicsService;
var graphicsDevice = graphicsService.GraphicsDevice;
var cameraNode = context.CameraNode;
// Update SceneNode.LastFrame for all visible nodes.
int frame = context.Frame;
cameraNode.LastFrame = frame;
var savedRenderState = new RenderStateSnapshot(graphicsDevice);
for (int i = 0; i < numberOfNodes; i++)
{
var node = nodes[i] as TerrainNode;
if (node == null)
{
continue;
}
// Node is visible in current frame.
node.LastFrame = frame;
if (!node.MaterialInstance.Contains(context.RenderPass))
{
continue;
}
TerrainRendererMesh mesh;
var meshKey = new Pair <int, int>(node.BaseClipmap.NumberOfLevels, node.BaseClipmap.CellsPerLevel);
bool meshExists = _meshes.TryGetValue(meshKey, out mesh);
if (!meshExists || mesh.IsDisposed)
{
// Warning: This may take a few seconds!
mesh = new TerrainRendererMesh(graphicsDevice, node.BaseClipmap.NumberOfLevels, node.BaseClipmap.CellsPerLevel);
_meshes[meshKey] = mesh;
}
// Get the EffectBindings and the Effect for the current render pass.
EffectBinding materialInstanceBinding = node.MaterialInstance[context.RenderPass];
EffectBinding materialBinding = node.Material[context.RenderPass];
Effect effect = materialBinding.Effect;
// Add this info to the render context. This info will be needed by parameter bindings.
context.SceneNode = node;
context.MaterialInstanceBinding = materialInstanceBinding;
context.MaterialBinding = materialBinding;
// Update and apply global effect parameter bindings - these bindings set the
// effect parameter values for "global" parameters. For example, if an effect uses
// a "ViewProjection" parameter, then a binding will compute this matrix from the
// current CameraInstance in the render context and update the effect parameter.
foreach (var binding in effect.GetParameterBindings())
{
if (binding.Description.Hint == EffectParameterHint.Global)
{
binding.Update(context);
binding.Apply(context);
}
}
// Update and apply material bindings - these are usually constant parameter values,
// like textures or colors, that are defined in the fbx file or material description
// (XML files).
//SetHoleParameter(materialBinding, context);
foreach (var binding in materialBinding.ParameterBindings)
{
binding.Update(context);
binding.Apply(context);
}
// Update and apply local, per-instance, and per-pass bindings - these are bindings
// for parameters, like the "World" matrix or lighting parameters.
foreach (var binding in materialInstanceBinding.ParameterBindings)
{
if (binding.Description.Hint != EffectParameterHint.PerPass)
{
binding.Update(context);
binding.Apply(context);
}
}
// Select and apply technique.
var techniqueBinding = materialInstanceBinding.TechniqueBinding;
techniqueBinding.Update(context);
var technique = techniqueBinding.GetTechnique(effect, context);
effect.CurrentTechnique = technique;
var passBinding = techniqueBinding.GetPassBinding(technique, context);
foreach (var pass in passBinding)
{
// Update and apply per-pass bindings.
foreach (var binding in materialInstanceBinding.ParameterBindings)
{
if (binding.Description.Hint == EffectParameterHint.PerPass)
{
binding.Update(context);
binding.Apply(context);
}
}
pass.Apply();
// The WireFrame pass is only rendered if DrawWireFrame is set.
if ((!string.Equals(pass.Name, "WireFrame", StringComparison.OrdinalIgnoreCase) || DrawWireFrame) &&
!string.Equals(pass.Name, "Restore", StringComparison.OrdinalIgnoreCase))
{
mesh.Submesh.Draw();
}
}
// Reset texture effect parameter:
// This seems to be necessary because the vertex textures are not automatically
// removed from the texture stage which causes exceptions later.
ResetParameter(effect, "TerrainBaseClipmap0");
ResetParameter(effect, "TerrainBaseClipmap1");
ResetParameter(effect, "TerrainBaseClipmap2");
ResetParameter(effect, "TerrainBaseClipmap3");
foreach (var pass in passBinding)
{
pass.Apply();
break;
}
}
context.SceneNode = null;
context.MaterialBinding = null;
context.MaterialInstanceBinding = null;
savedRenderState.Restore();
}
void IDictionary <string, EffectBinding> .Add(string key, EffectBinding value)
{
throw new NotSupportedException("The MaterialInstance is a read-only collection.");
}
// OnLoad() is called when the GameObject is added to the IGameObjectService.
protected override void OnLoad()
{
var graphicsService = _services.GetInstance <IGraphicsService>();
var gameObjectService = _services.GetInstance <IGameObjectService>();
// Check if the game object manager has another ProceduralObject instance.
var otherProceduralObject = gameObjectService.Objects
.OfType <ProceduralObject>()
.FirstOrDefault(o => o != this);
Mesh mesh;
if (otherProceduralObject != null)
{
// This ProceduralObject is not the first. We re-use rigid body data and
// the mesh from the existing instance.
var otherBody = otherProceduralObject._rigidBody;
_rigidBody = new RigidBody(otherBody.Shape, otherBody.MassFrame, otherBody.Material);
mesh = otherProceduralObject._meshNode.Mesh;
}
else
{
// This is the first ProceduralObject instance. We create a new rigid body
// and a new mesh.
var shape = new MinkowskiSumShape(new GeometricObject(new SphereShape(0.05f)), new GeometricObject(new BoxShape(0.5f, 0.5f, 0.5f)));
_rigidBody = new RigidBody(shape);
// Create a DigitalRune.Geometry.Meshes.TriangleMesh from the RigidBody's
// shape and convert this to a DigitalRune.Graphics.Mesh.
var triangleMesh = _rigidBody.Shape.GetMesh(0.01f, 4);
mesh = new Mesh {
Name = "ProceduralObject"
};
var submesh = CreateSubmeshWithTexCoords(graphicsService.GraphicsDevice, triangleMesh, MathHelper.ToRadians(70));
mesh.Submeshes.Add(submesh);
// Next, we need a material. We can load a predefined material (*.drmat file)
// with the content manager.
//var material = content.Load<Material>("Default");
// Alternatively, we can load some effects and build the material here:
Material material = new Material();
// We need an EffectBinding for each render pass.
// The "Default" pass uses a BasicEffectBinding (which is an EffectBinding
// for the XNA BasicEffect).
// Note: The "Default" pass is not used by the DeferredLightingScreen, so
// we could ignore this pass in this sample project.
BasicEffectBinding defaultEffectBinding = new BasicEffectBinding(graphicsService, null)
{
LightingEnabled = true,
TextureEnabled = true,
VertexColorEnabled = false
};
defaultEffectBinding.Set("Texture", graphicsService.GetDefaultTexture2DWhite());
defaultEffectBinding.Set("DiffuseColor", new Vector3(1, 1, 1));
defaultEffectBinding.Set("SpecularColor", new Vector3(1, 1, 1));
defaultEffectBinding.Set("SpecularPower", 100f);
material.Add("Default", defaultEffectBinding);
// EffectBinding for the "ShadowMap" pass.
// Note: EffectBindings which are used in a Material must be marked with
// the EffectParameterHint Material.
var content = _services.GetInstance <ContentManager>();
EffectBinding shadowMapEffectBinding = new EffectBinding(
graphicsService,
content.Load <Effect>("DigitalRune\\Materials\\ShadowMap"),
null,
EffectParameterHint.Material);
material.Add("ShadowMap", shadowMapEffectBinding);
// EffectBinding for the "GBuffer" pass.
EffectBinding gBufferEffectBinding = new EffectBinding(
graphicsService,
content.Load <Effect>("DigitalRune\\Materials\\GBuffer"),
null,
EffectParameterHint.Material);
gBufferEffectBinding.Set("SpecularPower", 100f);
material.Add("GBuffer", gBufferEffectBinding);
// EffectBinding for the "Material" pass.
EffectBinding materialEffectBinding = new EffectBinding(
graphicsService,
content.Load <Effect>("DigitalRune\\Materials\\Material"),
null,
EffectParameterHint.Material);
materialEffectBinding.Set("DiffuseTexture", graphicsService.GetDefaultTexture2DWhite());
materialEffectBinding.Set("DiffuseColor", new Vector3(1, 1, 1));
materialEffectBinding.Set("SpecularColor", new Vector3(1, 1, 1));
material.Add("Material", materialEffectBinding);
// Assign this material to the submesh.
submesh.SetMaterial(material);
}
// Create a scene graph node for the mesh.
_meshNode = new MeshNode(mesh);
// Set a random pose.
var randomPosition = new Vector3F(
RandomHelper.Random.NextFloat(-10, 10),
RandomHelper.Random.NextFloat(2, 5),
RandomHelper.Random.NextFloat(-20, 0));
_rigidBody.Pose = new Pose(randomPosition, RandomHelper.Random.NextQuaternionF());
_meshNode.PoseWorld = _rigidBody.Pose;
// Add mesh node to scene graph.
var scene = _services.GetInstance <IScene>();
scene.Children.Add(_meshNode);
// Add rigid body to the physics simulation.
var simulation = _services.GetInstance <Simulation>();
simulation.RigidBodies.Add(_rigidBody);
}
