/// <summary>
/// Reads skinning data
/// </summary>
/// <param name="description">Description</param>
/// <param name="modelContent">Model content</param>
/// <param name="meshName">Mesh name</param>
/// <param name="bindShapeMatrix">Resulting bind shape matrix</param>
/// <param name="weights">Resulting weights</param>
/// <param name="jointNames">Resulting joints</param>
/// <returns>Returns true if the model has skinnging data</returns>
private static bool ReadSkinningData(DrawingDataDescription description, ModelContent modelContent, string meshName, out Matrix bindShapeMatrix, out Weight[] weights, out string[] jointNames)
{
bindShapeMatrix = Matrix.Identity;
weights = null;
jointNames = null;
if (description.LoadAnimation && modelContent.Controllers != null && modelContent.SkinningInfo != null)
{
var cInfo = modelContent.Controllers.GetControllerForMesh(meshName);
if (cInfo != null)
{
//Apply shape matrix if controller exists but we are not loading animation info
bindShapeMatrix = cInfo.BindShapeMatrix;
weights = cInfo.Weights;
//Find skeleton for controller
var sInfo = modelContent.SkinningInfo[cInfo.Armature];
jointNames = sInfo.Skeleton.GetJointNames();
return(true);
}
}
return(false);
}
/// <summary>
/// Process the vertex data
/// </summary>
/// <param name="description">Decription</param>
/// <param name="geometry">Geometry</param>
/// <param name="vertexType">Vertext type</param>
/// <param name="vertices">Resulting vertices</param>
/// <param name="indices">Resulting indices</param>
private static void ProcessVertexData(DrawingDataDescription description, SubMeshContent geometry, VertexTypes vertexType, out VertexData[] vertices, out uint[] indices)
{
if (VertexData.IsTangent(vertexType))
{
geometry.ComputeTangents();
}
if (!description.Constraint.HasValue)
{
vertices = geometry.Vertices;
indices = geometry.Indices;
return;
}
if (geometry.Indices?.Length > 0)
{
ComputeConstraintIndices(
description.Constraint.Value,
geometry.Vertices, geometry.Indices,
out vertices, out indices);
}
else
{
ComputeConstraintVertices(
description.Constraint.Value,
geometry.Vertices,
out vertices);
indices = new uint[] { };
}
}
/// <summary>
/// Get vertex type from geometry
/// </summary>
/// <param name="description">Description</param>
/// <param name="materials">Material dictionary</param>
/// <param name="vertexType">Vertex type</param>
/// <param name="isSkinned">Sets wether the current geometry has skinning data or not</param>
/// <param name="material">Material name</param>
/// <returns>Returns the vertex type</returns>
private static VertexTypes GetVertexType(DrawingDataDescription description, MaterialDictionary materials, VertexTypes vertexType, bool isSkinned, string material)
{
var res = vertexType;
if (isSkinned)
{
//Get skinned equivalent
res = VertexData.GetSkinnedEquivalent(res);
}
if (!description.LoadNormalMaps)
{
return(res);
}
if (VertexData.IsTextured(res) && !VertexData.IsTangent(res))
{
var meshMaterial = materials[material];
if (meshMaterial?.NormalMap != null)
{
//Get tangent equivalent
res = VertexData.GetTangentEquivalent(res);
}
}
return(res);
}
/// <summary>
/// Model initialization
/// </summary>
/// <param name="game">Game</param>
/// <param name="bufferManager">Buffer manager</param>
/// <param name="modelContent">Model content</param>
/// <param name="description">Data description</param>
/// <returns>Returns the generated drawing data objects</returns>
public static DrawingData Build(Game game, BufferManager bufferManager, ModelContent modelContent, DrawingDataDescription description)
{
DrawingData res = new DrawingData(bufferManager);
//Animation
if (description.LoadAnimation)
{
InitializeSkinningData(ref res, modelContent);
}
//Images
InitializeTextures(ref res, game, modelContent, description.TextureCount);
//Materials
InitializeMaterials(ref res, modelContent);
//Skins & Meshes
InitializeGeometry(ref res, modelContent, description);
//Update meshes into device
InitializeMeshes(ref res, bufferManager, description.Instanced ? description.Instances : 0);
//Lights
InitializeLights(ref res, modelContent);
return(res);
}
/// <summary>
/// Initilize geometry
/// </summary>
/// <param name="drw">Drawing data</param>
/// <param name="modelContent">Model content</param>
/// <param name="description">Description</param>
private static void InitializeGeometry(ref DrawingData drw, ModelContent modelContent, DrawingDataDescription description)
{
List <Triangle> volumeMesh = new List <Triangle>();
foreach (string meshName in modelContent.Geometry.Keys)
{
//Get skinning data
var isSkinned = ReadSkinningData(
description, modelContent, meshName,
out var bindShapeMatrix, out var weights, out var jointNames);
//Process the mesh geometry material by material
var dictGeometry = modelContent.Geometry[meshName];
foreach (string material in dictGeometry.Keys)
{
var geometry = dictGeometry[material];
if (geometry.IsVolume)
{
//If volume, store position only
volumeMesh.AddRange(geometry.GetTriangles());
}
else
{
//Get vertex type
var vertexType = GetVertexType(description, drw.Materials, geometry.VertexType, isSkinned, material);
//Process the vertex data
ProcessVertexData(
description, geometry, vertexType,
out var vertices, out var indices);
for (int i = 0; i < vertices.Length; i++)
{
vertices[i] = vertices[i].Transform(bindShapeMatrix);
}
//Convert the vertex data to final mesh data
var vertexList = VertexData.Convert(
vertexType,
vertices,
weights,
jointNames);
if (vertexList.Any())
{
//Create and store the mesh into the drawing data
Mesh nMesh = new Mesh(
meshName,
geometry.Topology,
vertexList.ToArray(),
indices);
drw.Meshes.Add(meshName, geometry.Material, nMesh);
}
}
}
}
drw.VolumeMesh = volumeMesh.ToArray();
}
/// <summary>
/// Base model
/// </summary>
/// <param name="scene">Scene</param>
/// <param name="description">Object description</param>
protected BaseModel(Scene scene, BaseModelDescription description)
: base(scene, description)
{
var desc = new DrawingDataDescription()
{
Instanced = description.Instanced,
Instances = description.Instances,
LoadAnimation = description.LoadAnimation,
LoadNormalMaps = description.LoadNormalMaps,
TextureCount = this.TextureCount,
DynamicBuffers = description.Dynamic,
};
IEnumerable <ModelContent> geo;
if (!string.IsNullOrEmpty(description.Content.ModelContentFilename))
{
string contentFile = Path.Combine(description.Content.ContentFolder, description.Content.ModelContentFilename);
var contentDesc = Helper.DeserializeFromFile <ModelContentDescription>(contentFile);
var loader = contentDesc.GetLoader();
geo = loader.Load(description.Content.ContentFolder, contentDesc);
}
else if (description.Content.ModelContentDescription != null)
{
var loader = description.Content.ModelContentDescription.GetLoader();
geo = loader.Load(description.Content.ContentFolder, description.Content.ModelContentDescription);
}
else if (description.Content.ModelContent != null)
{
geo = new[] { description.Content.ModelContent };
}
else
{
throw new EngineException("No geometry found in description.");
}
if (geo.Count() == 1)
{
var iGeo = geo.First();
if (description.Optimize)
{
iGeo.Optimize();
}
var drawable = DrawingData.Build(this.Game, this.BufferManager, iGeo, desc);
this.meshesByLOD.Add(LevelOfDetail.High, drawable);
}
else
{
var content = new LevelOfDetailModelContent(geo, description.Optimize);
foreach (var lod in content.Keys)
{
if (this.defaultLevelOfDetail == LevelOfDetail.None)
{
this.defaultLevelOfDetail = lod;
}
var drawable = DrawingData.Build(this.Game, this.BufferManager, content[lod], desc);
this.meshesByLOD.Add(lod, drawable);
}
}
this.UseAnisotropicFiltering = description.UseAnisotropicFiltering;
}