D:/guillaume/guillara/3D/DXGfx/Backup/DXGfxLib/MeshRessource.cs

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using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.DirectX;
using Microsoft.DirectX.Direct3D;
using Microsoft.Samples.DirectX.UtilityToolkit;

namespace DXGfxLib
{
    public class MeshRessource
    {
        string name;

        string fileName;

        protected Mesh originalMesh = null;

        protected Mesh localMemMesh = null;

        protected ExtendedMaterial[] extendedMaterials;

        protected EffectInstance[] effectIntances;

        protected GraphicsStream adjacency = null;

        public Material[] meshMaterials;

        public Texture[] meshTextures;

        public Effect[] effects;

        public float bSphereRadius = 1.0f;

        public Vector3 barycenter = new Vector3();

        public BBox localBoundingBox = new BBox();

        public Vector3 extents = new Vector3();

        public MeshRessource(string fileName)
        {
            if (DXGfxManager.GetGlobalInstance().d3dDevice == null)
            {
                throw new Exception("Manager does not have any reference to any valid d3ddevice, this constructor can not be executed");
            }
            LoadFromFile(DXGfxManager.GetGlobalInstance().d3dDevice, fileName);
        }

        public MeshRessource(Device d3ddevice, string fileName)
        {
            LoadFromFile(d3ddevice, fileName);
        }

        public void LoadFromFile(Device d3ddevice, string fileName)
        {
            this.fileName = fileName;
            this.name = StringUtil.GetName(fileName);

            originalMesh = Mesh.FromFile(fileName, MeshFlags.SystemMemory, d3ddevice, out adjacency, out extendedMaterials, out effectIntances);

            originalMesh.OptimizeInPlace(MeshFlags.OptimizeVertexCache | MeshFlags.OptimizeCompact |
                    MeshFlags.OptimizeAttributeSort, adjacency);

            originalMesh.ComputeNormals();

            localMemMesh = originalMesh.Clone((originalMesh.Options.Value & ~MeshFlags.SystemMemory),
                originalMesh.VertexFormat, d3ddevice);

            // We need to extract the material properties and texture names 
            meshTextures = new Texture[extendedMaterials.Length];
            meshMaterials = new Material[extendedMaterials.Length];
            for (int i = 0; i < extendedMaterials.Length; i++)
            {
                meshMaterials[i] = extendedMaterials[i].Material3D;
                // Set the ambient color for the material (D3DX does not do this)
                meshMaterials[i].Ambient = meshMaterials[i].Diffuse;

                // Create the texture
                meshTextures[i] = ResourceCache.GetGlobalInstance().CreateTextureFromFile(d3ddevice,
                                                                                  extendedMaterials[i].TextureFilename);
            }

            localBoundingBox = CalculateLocalBBox(originalMesh);
            extents = localBoundingBox.Size();

            // Find the mesh's center, then generate a centering matrix
            using (VertexBuffer vb = originalMesh.VertexBuffer)
            {
                using (GraphicsStream stm = vb.Lock(0, 0, LockFlags.NoSystemLock))
                {
                    try
                    {
                        this.bSphereRadius = Geometry.ComputeBoundingSphere(stm,
                            originalMesh.NumberVertices, originalMesh.VertexFormat, out this.barycenter);
                    }
                    finally
                    {
                        vb.Unlock();
                    }
                }
            }
        }

        public virtual void Draw(Device d3ddevice, int subsetId, bool setMeshMaterial)
        {
            if (setMeshMaterial)
            {
                d3ddevice.Material = meshMaterials[subsetId];
                d3ddevice.SetTexture(0, meshTextures[subsetId]);
            }
            localMemMesh.DrawSubset(subsetId);
        }

        public virtual void Draw(Device d3ddevice, int subsetId)
        {
            Draw(d3ddevice, subsetId, true);
        }

        public virtual void Draw(Device d3ddevice)
        {
            for (int i = 0; i < meshMaterials.Length; i++)
            {
                Draw(d3ddevice, i);
            }
        }

        public BBox CalculateLocalBBox(Mesh meshToUse)
        {
            return AABBox.CalculateLocalBBox(meshToUse);
        }

        public Mesh GetDXMesh()
        {
            return originalMesh;
        }
    }
}

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