Risparmia 3D mesh in formato binario personalizzato

Utilizzando Aspose.3D for .NET API, gli sviluppatori possono aprire qualsiasi file 3D supportato e quindi scrivere mesh nel file binario.

Carica 3D file e scrivi mesh in formato binario personalizzato campione di programmazione

Il metodo Accept esposto dal membro RootNode nella classe Scene consente di visitare ogni sub nodo. Lo snippet di codice di seguito consente di convertire solo le mesh.

// 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;
    });
}