Vector3[] GetMeshPositions(DrawableGeometry Mesh)
{
Vector3[] Positions = new Vector3[Mesh.VerticesCount];
for (int i = 0; i < Mesh.VerticesCount; i++)
{
int StartIndex = Mesh.VertexStride * i;
Positions[i] = new Vector3(BitConverter.ToSingle(Mesh.VertexData.VertexBytes, StartIndex), BitConverter.ToSingle(Mesh.VertexData.VertexBytes, StartIndex + 4), BitConverter.ToSingle(Mesh.VertexData.VertexBytes, StartIndex + 8));
}
return(Positions);
}
private void MeshFBX(DrawableGeometry Mesh, int MeshID, StringBuilder ob)
{
if (Mesh.VerticesCount > 0)//general failsafe
{
ob.AppendFormat("\n\tGeometry: 3{0}, \"Geometry::\", \"Mesh\" {{", MeshID);
ob.Append("\n\t\tProperties70: {");
ob.AppendFormat("\n\t\t\tP: \"Color\", \"ColorRGB\", \"Color\", \"\",1.0,1.0,1.0");
ob.Append("\n\t\t}");
#region Vertices
ob.AppendFormat("\n\t\tVertices: *{0} {{\n\t\t\ta: ", Mesh.VerticesCount * 3);
int lineSplit = ob.Length;
Vector3[] Positions = GetMeshPositions(Mesh);
for (int v = 0; v < Positions.Length; v++)
{
ob.AppendFormat("{0},{1},{2},", Positions[v].X, Positions[v].Y, Positions[v].Z);
if (ob.Length - lineSplit > 2000)
{
ob.Append("\n");
lineSplit = ob.Length;
}
}
ob.Length--;//remove last comma
ob.Append("\n\t\t}");
#endregion
#region Indices
//in order to test topology for triangles/quads we need to store submeshes and write each one as geometry, then link to Mesh Node
ob.AppendFormat("\n\t\tPolygonVertexIndex: *{0} {{\n\t\t\ta: ", Mesh.IndicesCount);
lineSplit = ob.Length;
for (int f = 0; f < Mesh.IndicesCount / 3; f++)
{
ob.AppendFormat("{0},{1},{2},", Mesh.IndexBuffer.Indices[f * 3], Mesh.IndexBuffer.Indices[f * 3 + 2], (-Mesh.IndexBuffer.Indices[f * 3 + 1] - 1));
if (ob.Length - lineSplit > 2000)
{
ob.Append("\n");
lineSplit = ob.Length;
}
}
ob.Length--;//remove last comma
ob.Append("\n\t\t}");
ob.Append("\n\t\tGeometryVersion: 124");
#endregion
#region Normals
Vector3[] Normals = GetMeshNormals(Mesh);
if (Normals != null)
{
ob.Append("\n\t\tLayerElementNormal: 0 {");
ob.Append("\n\t\t\tVersion: 101");
ob.Append("\n\t\t\tName: \"\"");
ob.Append("\n\t\t\tMappingInformationType: \"ByVertice\"");
ob.Append("\n\t\t\tReferenceInformationType: \"Direct\"");
ob.AppendFormat("\n\t\t\tNormals: *{0} {{\n\t\t\ta: ", (Mesh.VerticesCount * 3));
lineSplit = ob.Length;
for (int v = 0; v < Normals.Length; v++)
{
ob.AppendFormat("{0},{1},{2},", Normals[v].X, Normals[v].Y, Normals[v].Z);
if (ob.Length - lineSplit > 2000)
{
ob.Append("\n");
lineSplit = ob.Length;
}
}
ob.Length--;//remove last comma
ob.Append("\n\t\t\t}\n\t\t}");
}
#endregion
#region Tangents
Vector3[] Tangents = GetMeshTangents(Mesh);
if (Tangents != null)
{
ob.Append("\n\t\tLayerElementTangent: 0 {");
ob.Append("\n\t\t\tVersion: 101");
ob.Append("\n\t\t\tName: \"\"");
ob.Append("\n\t\t\tMappingInformationType: \"ByVertice\"");
ob.Append("\n\t\t\tReferenceInformationType: \"Direct\"");
ob.AppendFormat("\n\t\t\tTangents: *{0} {{\n\t\t\ta: ", Mesh.VerticesCount * 3);
lineSplit = ob.Length;
for (int v = 0; v < Tangents.Length; v++)
{
ob.AppendFormat("{0},{1},{2},", Tangents[v].X, Tangents[v].Y, Tangents[v].Z);
if (ob.Length - lineSplit > 2000)
{
ob.Append("\n");
lineSplit = ob.Length;
}
}
ob.Length--;//remove last comma
ob.Append("\n\t\t\t}\n\t\t}");
}
#endregion
#region UV1
//does FBX support UVW coordinates?
Vector2[] UVs = GetMeshUVs(Mesh);
if (UVs != null)
{
ob.Append("\n\t\tLayerElementUV: 0 {");
ob.Append("\n\t\t\tVersion: 101");
ob.Append("\n\t\t\tName: \"UVChannel_1\"");
ob.Append("\n\t\t\tMappingInformationType: \"ByVertice\"");
ob.Append("\n\t\t\tReferenceInformationType: \"Direct\"");
ob.AppendFormat("\n\t\t\tUV: *{0} {{\n\t\t\ta: ", Mesh.VerticesCount * 2);
lineSplit = ob.Length;
for (int v = 0; v < UVs.Length; v++)
{
ob.AppendFormat("{0},{1},", UVs[v].X, 1 - UVs[v].Y);
if (ob.Length - lineSplit > 2000)
{
ob.Append("\n");
lineSplit = ob.Length;
}
}
ob.Length--;//remove last comma
ob.Append("\n\t\t\t}\n\t\t}");
}
#endregion
#region Material
ob.Append("\n\t\tLayerElementMaterial: 0 {");
ob.Append("\n\t\t\tVersion: 101");
ob.Append("\n\t\t\tName: \"\"");
ob.Append("\n\t\t\tMappingInformationType: \"");
ob.Append("AllSame\"");
ob.Append("\n\t\t\tReferenceInformationType: \"IndexToDirect\"");
// ob.AppendFormat("\n\t\t\tMaterials: *{0} {{", Mesh.TrianglesCount);
ob.AppendFormat("\n\t\t\tMaterials: *{0} {{", 1);
ob.Append("\n\t\t\t\t");
// ob.Append("0");
ob.Append("a: 0");
ob.Append("\n\t\t\t}\n\t\t}");
#endregion
#region Layers
ob.Append("\n\t\tLayer: 0 {");
ob.Append("\n\t\t\tVersion: 100");
if (Normals != null)
{
ob.Append("\n\t\t\tLayerElement: {");
ob.Append("\n\t\t\t\tType: \"LayerElementNormal\"");
ob.Append("\n\t\t\t\tTypedIndex: 0");
ob.Append("\n\t\t\t}");
}
if (Tangents != null)
{
ob.Append("\n\t\t\tLayerElement: {");
ob.Append("\n\t\t\t\tType: \"LayerElementTangent\"");
ob.Append("\n\t\t\t\tTypedIndex: 0");
ob.Append("\n\t\t\t}");
}
ob.Append("\n\t\t\tLayerElement: {");
ob.Append("\n\t\t\t\tType: \"LayerElementMaterial\"");
ob.Append("\n\t\t\t\tTypedIndex: 0");
ob.Append("\n\t\t\t}");
//
/*ob.Append("\n\t\t\tLayerElement: {");
* ob.Append("\n\t\t\t\tType: \"LayerElementTexture\"");
* ob.Append("\n\t\t\t\tTypedIndex: 0");
* ob.Append("\n\t\t\t}");
* ob.Append("\n\t\t\tLayerElement: {");
* ob.Append("\n\t\t\t\tType: \"LayerElementBumpTextures\"");
* ob.Append("\n\t\t\t\tTypedIndex: 0");
* ob.Append("\n\t\t\t}");*/
if (UVs != null)
{
ob.Append("\n\t\t\tLayerElement: {");
ob.Append("\n\t\t\t\tType: \"LayerElementUV\"");
ob.Append("\n\t\t\t\tTypedIndex: 0");
ob.Append("\n\t\t\t}");
}
ob.Append("\n\t\t}"); //Layer 0 end
#endregion
ob.Append("\n\t}"); //Geometry end
}
}
