Save 3D Meshes in Custom Binary Format

Aspose.3D for .NET API kullanarak, geliştiriciler desteklenen herhangi bir 3D dosyasını açabilir ve ardından ikili dosyadaki kafesleri yazabilirler.

3D dosyasını yükleyin ve özel ikili format programlama örneğinde kafesler yazın

Accept method exposed by the RootNode member in the Scene class allows to visit each sub node. The code snippet below allows to convert meshes only.

// load a 3D file
Scene scene = Scene.FromFile("test.fbx");

/*
* 3D format demonstration is simple
* 
* struct File {
*   MeshBlock blocks[];
* };
*
* struct Vertex {
*   float x;
*   float y;
*   float z;
* };
* 
* struct Triangle {
*   int a;
*   int b;
*   int c;
* };
* 
* struct MeshBlock {
*   int numControlPoints;
*   int numTriangles;
*   Vertex vertices[numControlPoints];
*   Triangle faces[numTriangles];
* };
*/

// open file for writing in binary mode
using (var writer = new BinaryWriter(new FileStream("Save3DMeshesInCustomBinaryFormat_out", FileMode.Create, FileAccess.Write)))
{
    // visit each descent nodes
    scene.RootNode.Accept(delegate(Node node)
    {
        foreach (Entity entity in node.Entities)
        {
            // only convert meshes, lights/camera and other stuff will be ignored
            if (!(entity is IMeshConvertible))
                continue;
            Mesh m = ((IMeshConvertible)entity).ToMesh();
            var controlPoints = m.ControlPoints;
            // triangulate the mesh, so triFaces will only store triangle indices
            int[][] triFaces = PolygonModifier.Triangulate(controlPoints, m.Polygons);
            // gets the global transform matrix
            Matrix4 transform = node.GlobalTransform.TransformMatrix;

            // write number of control points and triangle indices
            writer.Write(controlPoints.Count);
            writer.Write(triFaces.Length);
            // write control points
            for (int i = 0; i < controlPoints.Count; i++)
            {
                // calculate the control points in world space and save them to file
                var cp = transform * controlPoints[i];
                writer.Write((float)cp.x);
                writer.Write((float)cp.y);
                writer.Write((float)cp.z);
            }
            // write triangle indices
            for (int i = 0; i < triFaces.Length; i++)
            {
                writer.Write(triFaces[i][0]);
                writer.Write(triFaces[i][1]);
                writer.Write(triFaces[i][2]);
            }
        }
        return true;
    });
}