/// <summary>
/// Initializes a new instance of the <see cref="RenderMesh" /> class.
/// </summary>
/// <param name="renderModel">The render model.</param>
/// <param name="mesh">The mesh data.</param>
/// <exception cref="System.ArgumentNullException">mesh</exception>
public RenderMesh(RenderModel renderModel, Mesh mesh)
{
if (renderModel == null) throw new ArgumentNullException("renderModel");
if (mesh == null) throw new ArgumentNullException("mesh");
RenderModel = renderModel;
Mesh = mesh;
Enabled = true;
parameterCollections = new FastListStruct<ParameterCollection>(8);
previousParameterCollections = new FastListStruct<ParameterCollection>(8);
UpdateMaterial();
// A RenderMesh is inheriting values from Mesh.Parameters
// We are considering that Mesh.Parameters is not updated frequently (should be almost immutable)
parameters = new ParameterCollection();
if (mesh.Parameters != null)
{
parameters.AddSources(mesh.Parameters);
}
}
private bool PrepareRenderModelForRendering(RenderContext context, RenderModel model)
{
var shaderKeyIdBuilder = new ObjectIdSimpleBuilder();
var parametersKeyIdBuilder = new ObjectIdSimpleBuilder();
//var idBuilder = new ObjectIdBuilder();
var modelComponent = model.ModelComponent;
var group = modelComponent.Entity.Group;
var modelBoundingBox = modelComponent.BoundingBox;
directLightsPerModel.Clear();
directLightShaderGroupEntryKeys.Clear();
directLightShaderGroupEntryKeysNoShadows.Clear();
environmentLightsPerModel.Clear();
environmentLightShaderGroupEntryKeys.Clear();
// This loop is looking for visible lights per render model and calculate a ShaderId and ParametersId
// TODO: Part of this loop could be processed outisde of the PrepareRenderModelForRendering
// For example: Environment lights or directional lights are always active, so we could pregenerate part of the
// id and groups outside this loop. Also considering that each light renderer has a maximum of lights
// we could pre
foreach (var activeRenderer in activeRenderers)
{
var lightRenderer = activeRenderer.LightRenderer;
var lightCollection = activeRenderer.LightGroup.FindLightCollectionByGroup(group);
var lightCount = lightCollection == null ? 0 : lightCollection.Count;
int lightMaxCount = Math.Min(lightCount, lightRenderer.LightMaxCount);
var lightRendererId = lightRenderer.LightRendererId;
var allocCountForNewLightType = lightRenderer.AllocateLightMaxCount ? (byte)lightRenderer.LightMaxCount : (byte)1;
var currentShaderKey = new LightForwardShaderEntryKey();
// Path for environment lights
if (lightRenderer.IsEnvironmentLight)
{
// The loop is simpler for environment lights (single group per light, no shadow maps, no bounding box...etc)
for(int i = 0; i < lightMaxCount; i++)
{
var light = lightCollection[i];
currentShaderKey = new LightForwardShaderEntryKey(lightRendererId, 0, allocCountForNewLightType);
unsafe
{
shaderKeyIdBuilder.Write(*(uint*)¤tShaderKey);
}
parametersKeyIdBuilder.Write(light.Id);
environmentLightsPerModel.Add(new LightEntry(environmentLightShaderGroupEntryKeys.Count, 0, light, null));
environmentLightShaderGroupEntryKeys.Add(new LightForwardShaderFullEntryKey(currentShaderKey, lightRenderer, null));
}
}
else
{
ILightShadowMapRenderer currentShadowRenderer = null;
for (int i = 0; i < lightMaxCount; i++)
{
var light = lightCollection[i];
var directLight = (IDirectLight)light.Type;
// If the light does not intersects the model, we can skip it
if (directLight.HasBoundingBox && !light.BoundingBox.Intersects(ref modelBoundingBox))
{
continue;
}
LightShadowMapTexture shadowTexture = null;
LightShadowType shadowType = 0;
ILightShadowMapRenderer newShadowRenderer = null;
if (shadowMapRenderer != null && shadowMapRenderer.LightComponentsWithShadows.TryGetValue(light, out shadowTexture))
{
shadowType = shadowTexture.ShadowType;
newShadowRenderer = shadowTexture.Renderer;
}
if (i == 0)
{
currentShaderKey = new LightForwardShaderEntryKey(lightRendererId, shadowType, allocCountForNewLightType);
currentShadowRenderer = newShadowRenderer;
}
else
{
if (currentShaderKey.LightRendererId == lightRendererId && currentShaderKey.ShadowType == shadowType)
{
if (!lightRenderer.AllocateLightMaxCount)
{
currentShaderKey.LightCount++;
}
}
else
{
unsafe
{
shaderKeyIdBuilder.Write(*(uint*)¤tShaderKey);
}
directLightShaderGroupEntryKeys.Add(new LightForwardShaderFullEntryKey(currentShaderKey, lightRenderer, currentShadowRenderer));
currentShaderKey = new LightForwardShaderEntryKey(lightRendererId, shadowType, allocCountForNewLightType);
currentShadowRenderer = newShadowRenderer;
}
}
parametersKeyIdBuilder.Write(light.Id);
directLightsPerModel.Add(new LightEntry(directLightShaderGroupEntryKeys.Count, directLightShaderGroupEntryKeysNoShadows.Count, light, shadowTexture));
}
if (directLightsPerModel.Count > 0)
{
directLightShaderGroupEntryKeysNoShadows.Add(new LightForwardShaderFullEntryKey(new LightForwardShaderEntryKey(lightRendererId, 0, (byte)directLightsPerModel.Count), lightRenderer, null));
unsafe
{
shaderKeyIdBuilder.Write(*(uint*)¤tShaderKey);
}
directLightShaderGroupEntryKeys.Add(new LightForwardShaderFullEntryKey(currentShaderKey, lightRenderer, currentShadowRenderer));
}
}
}
// Find or create an existing shaders/parameters permutation
// Build the keys for Shaders and Parameters permutations
ObjectId shaderKeyId;
ObjectId parametersKeyId;
shaderKeyIdBuilder.ComputeHash(out shaderKeyId);
parametersKeyIdBuilder.ComputeHash(out parametersKeyId);
// Calculate the shader parameters just once
// If we don't have already this permutation, use it
LightShaderPermutationEntry newLightShaderPermutationEntry;
if (!shaderEntries.TryGetValue(shaderKeyId, out newLightShaderPermutationEntry))
{
newLightShaderPermutationEntry = CreateShaderPermutationEntry();
shaderEntries.Add(shaderKeyId, newLightShaderPermutationEntry);
}
LightParametersPermutationEntry newShaderEntryParameters;
// Calculate the shader parameters just once per light combination and for this rendering pass
if (!lightParameterEntries.TryGetValue(parametersKeyId, out newShaderEntryParameters))
{
newShaderEntryParameters = CreateParametersPermutationEntry(newLightShaderPermutationEntry);
lightParameterEntries.Add(parametersKeyId, newShaderEntryParameters);
}
modelToLights.Add(model, new RenderModelLights(newLightShaderPermutationEntry, newShaderEntryParameters));
return true;
}
private void PrepareRenderMeshes(RenderModel renderModel, List<Mesh> meshes, ref FastListStruct<RenderMesh> renderMeshes, RenderItemCollection opaqueList, RenderItemCollection transparentList)
{
// Add new render meshes
for (int i = renderMeshes.Count; i < meshes.Count; i++)
{
var renderMesh = new RenderMesh(renderModel, meshes[i]);
renderMeshes.Add(renderMesh);
}
// Create the bounding frustum locally on the stack, so that frustum.Contains is performed with boundingBox that is also on the stack
var frustum = new BoundingFrustum(ref ViewProjectionMatrix);
var sceneCameraRenderer = Context.Tags.Get(SceneCameraRenderer.Current);
var cullingMode = CullingModeOverride ?? (sceneCameraRenderer?.CullingMode ?? CameraCullingMode.None);
for (int i = 0; i < renderMeshes.Count; i++)
{
var renderMesh = renderMeshes[i];
// Update the model hierarchy
var modelViewHierarchy = renderModel.ModelComponent.Skeleton;
modelViewHierarchy.UpdateRenderMesh(renderMesh);
if (!renderMesh.Enabled || !renderMesh.UpdateMaterial())
{
continue;
}
// Upload skinning blend matrices
BoundingBoxExt boundingBox;
skinningUpdater.Update(modelViewHierarchy, renderMesh, out boundingBox);
// Fast AABB transform: http://zeuxcg.org/2010/10/17/aabb-from-obb-with-component-wise-abs/
// Compute transformed AABB (by world)
// TODO: CameraCullingMode should be pluggable
// TODO: This should not be necessary. Add proper bounding boxes to gizmos etc.
if (cullingMode == CameraCullingMode.Frustum && boundingBox.Extent != Vector3.Zero && !frustum.Contains(ref boundingBox))
{
continue;
}
// Project the position
// TODO: This could be done in a SIMD batch, but we need to figure-out how to plugin in with RenderMesh object
var worldPosition = new Vector4(renderMesh.WorldMatrix.TranslationVector, 1.0f);
Vector4 projectedPosition;
Vector4.Transform(ref worldPosition, ref ViewProjectionMatrix, out projectedPosition);
var projectedZ = projectedPosition.Z / projectedPosition.W;
renderMesh.RasterizerState = renderMesh.IsGeometryInverted ? RasterizerStateForInvertedGeometry : RasterizerState;
renderMesh.ForceRasterizer = ForceRasterizer;
var list = renderMesh.HasTransparency ? transparentList : opaqueList;
list.Add(new RenderItem(this, renderMesh, projectedZ));
}
}
