VertexPositionColorNormalTextureTangentBones.cs

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace XNALara
{
    public class VertexPositionColorNormalTextureTangentBones : VertexFormat
    {
        private struct VertexData
        {
            public Vector3 position;
            public Vector4 color;
            public Vector3 normal;
            public Vector2 texCoords;
            public Vector4 tangent;
            public Vector4 boneIndices;
            public Vector4 boneWeights;
        }

        private static VertexElement[] vertexElements = new VertexElement[] {
            new VertexElement(0, 0 * sizeof(float), VertexElementFormat.Vector3, VertexElementMethod.Default, VertexElementUsage.Position, 0),
            new VertexElement(0, 3 * sizeof(float), VertexElementFormat.Vector4, VertexElementMethod.Default, VertexElementUsage.Color, 0),
            new VertexElement(0, 7 * sizeof(float), VertexElementFormat.Vector3, VertexElementMethod.Default, VertexElementUsage.Normal, 0),
            new VertexElement(0, 10 * sizeof(float), VertexElementFormat.Vector2, VertexElementMethod.Default, VertexElementUsage.TextureCoordinate, 0),
            new VertexElement(0, 12 * sizeof(float), VertexElementFormat.Vector4, VertexElementMethod.Default, VertexElementUsage.Tangent, 0),
            new VertexElement(0, 16 * sizeof(float), VertexElementFormat.Vector4, VertexElementMethod.Default, VertexElementUsage.BlendIndices, 0),
            new VertexElement(0, 20 * sizeof(float), VertexElementFormat.Vector4, VertexElementMethod.Default, VertexElementUsage.BlendWeight, 0)
        };

        public override VertexElement[] VertexElements {
            get { return vertexElements; }
        }

        public override int SizeInBytes {
            get { return 24 * sizeof(float); }
        }

        public override VertexBuffer BuildVertexBuffer(GraphicsDevice graphicsDevice, MeshDesc meshDesc) {
            VertexBuffer vertexBuffer = new VertexBuffer(graphicsDevice, meshDesc.vertices.Length * SizeInBytes, BufferUsage.WriteOnly);
            VertexData[] vertexData = new VertexData[meshDesc.vertices.Length];
            for (int i = 0; i < vertexData.Length; i++) {
                vertexData[i].position = meshDesc.vertices[i].position;
                vertexData[i].color = meshDesc.vertices[i].color;
                vertexData[i].normal = meshDesc.vertices[i].normal;
                vertexData[i].texCoords = meshDesc.vertices[i].texCoords[0];
                if (meshDesc.vertices[i].tangents != null) {
                    vertexData[i].tangent = meshDesc.vertices[i].tangents[0];
                }
                short[] boneIndices = meshDesc.vertices[i].boneIndicesLocal;
                float[] boneWeights = meshDesc.vertices[i].boneWeights;
                if (boneIndices != null) {
                    vertexData[i].boneIndices = new Vector4(boneIndices[0], boneIndices[1], boneIndices[2], boneIndices[3]);
                }
                if (boneWeights != null) {
                    vertexData[i].boneWeights = new Vector4(boneWeights[0], boneWeights[1], boneWeights[2], boneWeights[3]);
                }
            }
            vertexBuffer.SetData(vertexData);
            return vertexBuffer;
        }
    }
}