anx.framework/ANX.Framework/Graphics/Model.cs

#region Using Statements
using System;

#endregion // Using Statements

#region License

//
// This file is part of the ANX.Framework created by the "ANX.Framework developer group".
//
// This file is released under the Ms-PL license.
//
//
//
// Microsoft Public License (Ms-PL)
//
// This license governs use of the accompanying software. If you use the software, you accept this license. 
// If you do not accept the license, do not use the software.
//
// 1.Definitions
//   The terms "reproduce," "reproduction," "derivative works," and "distribution" have the same meaning 
//   here as under U.S. copyright law.
//   A "contribution" is the original software, or any additions or changes to the software.
//   A "contributor" is any person that distributes its contribution under this license.
//   "Licensed patents" are a contributor's patent claims that read directly on its contribution.
//
// 2.Grant of Rights
//   (A) Copyright Grant- Subject to the terms of this license, including the license conditions and limitations 
//       in section 3, each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to 
//       reproduce its contribution, prepare derivative works of its contribution, and distribute its contribution
//       or any derivative works that you create.
//   (B) Patent Grant- Subject to the terms of this license, including the license conditions and limitations in 
//       section 3, each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed
//       patents to make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution 
//       in the software or derivative works of the contribution in the software.
//
// 3.Conditions and Limitations
//   (A) No Trademark License- This license does not grant you rights to use any contributors' name, logo, or trademarks.
//   (B) If you bring a patent claim against any contributor over patents that you claim are infringed by the software, your 
//       patent license from such contributor to the software ends automatically.
//   (C) If you distribute any portion of the software, you must retain all copyright, patent, trademark, and attribution 
//       notices that are present in the software.
//   (D) If you distribute any portion of the software in source code form, you may do so only under this license by including
//       a complete copy of this license with your distribution. If you distribute any portion of the software in compiled or 
//       object code form, you may only do so under a license that complies with this license.
//   (E) The software is licensed "as-is." You bear the risk of using it. The contributors give no express warranties, guarantees,
//       or conditions. You may have additional consumer rights under your local laws which this license cannot change. To the
//       extent permitted under your local laws, the contributors exclude the implied warranties of merchantability, fitness for a 
//       particular purpose and non-infringement.

#endregion // License

namespace ANX.Framework.Graphics
{
    public sealed class Model
    {
        private ModelBoneCollection bones;

        public ModelBoneCollection Bones
        {
            get { return bones; }
        }

        private ModelMeshCollection meshes;

        public ModelMeshCollection Meshes
        {
            get { return meshes; }
        }

        private ModelBone root;

        public ModelBone Root
        {
            get { return root; }
        }

        private Object tag;

        public Object Tag
        {
            get { return tag; }
            set { tag = value; }
        }

        private static Matrix[] cachedBonesArray;

        public Model(ModelBoneCollection bones, ModelMeshCollection meshes, ModelBone rootBone, Object tag)
        {
            this.bones = bones;
            this.meshes = meshes;
            this.root = rootBone;
            this.tag = tag;
        }

        public void CopyAbsoluteBoneTransformsTo(Matrix[] destinationBoneTransforms)
        {
            if (destinationBoneTransforms == null)
            {
                throw new ArgumentNullException("destinationBoneTransforms");
            }

            if (destinationBoneTransforms.Length < bones.Count)
            {
                throw new ArgumentOutOfRangeException("destinationBoneTransforms");
            }

            for (int i = 0; i < bones.Count; i++)
            {
                var bone = bones[i];
                if (bone.Parent == null)
                {
                    destinationBoneTransforms[i] = bone.Transform;
                }
                else
                {
                    int parentIndex = bone.Parent.Index;
                    destinationBoneTransforms[i] = bone.Transform * destinationBoneTransforms[parentIndex];
                }
            }
        }

        public void CopyBoneTransformsFrom(Matrix[] sourceBoneTransforms)
        {
            if (sourceBoneTransforms == null)
            {
                throw new ArgumentNullException("sourceBoneTransforms");
            }

            if (sourceBoneTransforms.Length < bones.Count)
            {
                throw new ArgumentOutOfRangeException("sourceBoneTransforms");
            }

            for (int i = 0; i < bones.Count; i++)
            {
                bones[i].Transform = sourceBoneTransforms[i];
            }
        }

        public void CopyBoneTransformsTo(Matrix[] destinationBoneTransforms)
        {
            if (destinationBoneTransforms == null)
            {
                throw new ArgumentNullException("destinationBoneTransforms");
            }

            if (destinationBoneTransforms.Length < bones.Count)
            {
                throw new ArgumentOutOfRangeException("destinationBoneTransforms");
            }

            for (int i = 0; i < bones.Count; i++)
            {
                destinationBoneTransforms[i] = bones[i].Transform;
            }
        }

        public void Draw (Matrix world, Matrix view, Matrix projection)
        {
            Matrix[] absTransforms = Model.cachedBonesArray;
            if (absTransforms == null || absTransforms.Length < this.bones.Count)
            {
                Array.Resize<Matrix>(ref absTransforms, this.bones.Count);
                Model.cachedBonesArray = absTransforms;
            }
            this.CopyAbsoluteBoneTransformsTo(absTransforms);

            foreach (var mesh in meshes)
            {
                foreach (var effect in mesh.Effects)
                {
                    IEffectMatrices matEffect = effect as IEffectMatrices;
                    if (matEffect != null)
                    {
                        matEffect.World = absTransforms[mesh.ParentBone.Index] * world;
                        matEffect.View = view;
                        matEffect.Projection = projection;
                    }
                }

                mesh.Draw();
            }
        }
    }
}