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Aspose.3D for .NET是功能丰富的游戏软件和计算机辅助设计（CAD）API，用于处理3D文档格式，无需任何3D建模和渲染软件依赖。同时支持Discreet3DS、WavefrontOBJ、FBX（ASCII，二进制）、STL（ASCII，二进制）、Universal3D、Collada、glTF、GLB、PLY、DirectX、Google Draco文件格式等。开发人员可以轻松地创建，阅读，转换，修改和控制3D文档格式的内容。

近日，Aspose.3D迎来了2020年4月更新，新增Linux渲染支持 ，添加轨道运动控制，添加A3DW格式的线路支持，具体更新如下： >>点击下载Aspose.3D v20.4

具体更新内容

公共API的更改

▲将成员添加到Aspose.ThreeD.Utilities.Vertex类

用法示例：

Scene s = new Scene(@"test.stl");
var mesh = (Mesh)s.RootNode.ChildNodes[0].Entity;
 
//create a VertexDeclaration so we can get the TriMesh with memory layout exactly we want.
var vd = new VertexDeclaration();
 
var pos = vd.AddField(VertexFieldDataType.FVector3, VertexFieldSemantic.Position);
var normal = vd.AddField(VertexFieldDataType.FVector3, VertexFieldSemantic.Normal);
var uv = vd.AddField(VertexFieldDataType.FVector2, VertexFieldSemantic.UV);
 
//construct the TriMesh using specified vertex layout
var m = TriMesh.FromMesh(vd, mesh);
//print each vertex's position, normal and uv
foreach(var vtx in m)
{
    var v_pos = vtx.ReadVector3(pos);
    var v_normal = vtx.ReadVector3(normal);
    var v_uv = vtx.ReadVector2(uv);
        Console.WriteLine($"({v_pos}), ({v_uv}), ({v_normal})");
}

▲向Aspose.ThreeD.Entities.TriMesh类添加成员

如果您的TriMesh实例带有不确定的内存布局，则可以使用此方法来构造具有确切所需的内存布局的新实例。

用法示例：

Scene s = new Scene(@"test.STL");
var mesh = (Mesh)s.RootNode.ChildNodes[0].Entity;
var originalTriMesh = TriMesh.FromMesh(mesh);
 
//If the original TriMesh's memory layout is not what you wanted, you can use CopyFrom to get a new instance
//with specified memory layout
 
var vd = new VertexDeclaration();
var pos = vd.AddField(VertexFieldDataType.FVector3, VertexFieldSemantic.Position);
var normal = vd.AddField(VertexFieldDataType.FVector3, VertexFieldSemantic.Normal);
var uv = vd.AddField(VertexFieldDataType.FVector2, VertexFieldSemantic.UV);
var m = TriMesh.CopyFrom(originalTriMesh, vd);
foreach(var vtx in m)
{
    //Field's offset in vertex can be retrieved by VertexField.Offset 
    var v_pos = vtx.ReadVector3(pos);
    var v_normal = vtx.ReadVector3(normal);
    var v_uv = vtx.ReadVector2(uv);
        Console.WriteLine($"({v_pos}), ({v_uv}), ({v_normal})");
}

▲向Aspose.ThreeD.Entities.TriMesh类添加成员

使用此方法，您可以像反序列化一样轻松地从字节数组重建TriMesh实例。

用法示例：

Scene s = new Scene(@"test.STL");
var mesh = (Mesh)s.RootNode.ChildNodes[0].Entity;
var vd = new VertexDeclaration();
var pos = vd.AddField(VertexFieldDataType.FVector3, VertexFieldSemantic.Position);
var normal = vd.AddField(VertexFieldDataType.FVector3, VertexFieldSemantic.Normal);
var uv = vd.AddField(VertexFieldDataType.FVector2, VertexFieldSemantic.UV);
 
var originalTriMesh = TriMesh.FromMesh(vd, mesh);
 
//If the original TriMesh's memory layout is not what you wanted, you can use CopyFrom to get a new instance
//with specified memory layout
byte[] verticesInBytes = originalTriMesh.VerticesToArray();
int[] indices;
originalTriMesh.IndicesToArray(out indices);
var m = TriMesh.FromRawData(vd, verticesInBytes, indices, true);
 
foreach(var vtx in m)
{
    //Field's offset in vertex can be retrieved by VertexField.Offset 
    var v_pos = vtx.ReadVector3(pos);
    var v_normal = vtx.ReadVector3(normal);
    var v_uv = vtx.ReadVector2(uv);
    Console.WriteLine($"({v_pos}), ({v_uv}), ({v_normal})");
}