public MyObject(Lib3dsMesh _node, Lib3dsFile _model)
{
this.node = _node;
this.model = _model;
if (_node.faces == null || _node.faces.Count == 0)
{
this.Flag = false;
}
else
{
this.Flag = true;
this.Normalizes = new Lib3dsVertex[_node.faces.Count];
for (int i = 0; i < _node.faces.Count; i++)
{
Lib3dsFace face = _node.faces[i];
Lib3dsVertex Point1 = _node.vertices[face.index[0]];
Lib3dsVertex Point2 = _node.vertices[face.index[1]];
Lib3dsVertex Point3 = _node.vertices[face.index[2]];
this.Normalizes[i] = CreateNormalize(Point1, Point2, Point3);
}
}
}
/// <summary>
/// Caltulate the normalize line of a face.
/// </summary>
/// <param name="p1">Vertex 1</param>
/// <param name="p2">Vertex 2</param>
/// <param name="p3">Vertex 3</param>
/// <returns>Normalized Vertex</returns>
private Lib3dsVertex CreateNormalize(Lib3dsVertex p1, Lib3dsVertex p2, Lib3dsVertex p3)
{
Lib3dsVertex v1 = new Lib3dsVertex();
Lib3dsVertex v2 = new Lib3dsVertex();
Lib3dsVertex rnt = new Lib3dsVertex();
v1.x = (p1.x - p3.x);
v1.y = (p1.y - p3.y);
v1.z = (p1.z - p3.z);
v2.x = (p3.x - p2.x);
v2.y = (p3.y - p2.y);
v2.z = (p3.z - p2.z);
rnt.x = v1.y * v2.z - v1.z * v2.y;
rnt.y = v1.z * v2.x - v1.x * v2.z;
rnt.z = v1.x * v2.y - v1.y * v2.x;
return(rnt);
}
//写3DS文件
protected virtual bool writeToFile()
{
if (mDbVertices == null || mDbTextureCoors == null || uFacesIndex == null)
{
return(false);
}
//新建LIB3DS文件对象
Lib3dsFile file = LIB3DS.lib3ds_file_new();
file.frames = 360;
//新建网格节点
Lib3dsMesh mesh = LIB3DS.lib3ds_mesh_new("mesh");
Lib3dsMeshInstanceNode inst;
LIB3DS.lib3ds_file_insert_mesh(file, mesh, -1);
//一、将顶点写入网格
int nVertices = mDbVertices.GetLength(0);
LIB3DS.lib3ds_mesh_resize_vertices(mesh, (ushort)nVertices, true, false);
for (int i = 0; i < nVertices; i++)
{
Lib3dsVertex vertexTmp = new Lib3dsVertex(mDbVertices[i, 0], mDbVertices[i, 1], mDbVertices[i, 2]);
LIB3DS.lib3ds_vector_copy(mesh.vertices[i], vertexTmp);
//将纹理坐标写入网格
mesh.texcos[i] = new Lib3dsTexturecoordinate(mDbTextureCoors[i, 0], mDbTextureCoors[i, 1]);
}
//二、将纹理信息写入文件
Lib3dsMaterial mat = LIB3DS.lib3ds_material_new("material1");
LIB3DS.lib3ds_file_insert_material(file, mat, -1);
//如果没有指定纹理，则默认为灰色材质
if (String.IsNullOrEmpty(mSzTextureFilename))
{
mat.diffuse[0] = 0.5f;
mat.diffuse[1] = 0.5f;
mat.diffuse[2] = 0.5f;
}
else
{
mat.texture1_map.name = mSzTextureFilename;
mat.texture1_map.percent = 1.0f;
}
//三、将三角化后的面的顶点索引号写入网格
int nFaces = uFacesIndex.GetLength(0);
LIB3DS.lib3ds_mesh_resize_faces(mesh, (ushort)nFaces);
for (int i = 0; i < nFaces; i++)
{
for (int j = 0; j < 3; j++)
{
mesh.faces[i].index[j] = uFacesIndex[i, j];
}
//指定每个三角化后的面的材质
mesh.faces[i].material = 0;
}
inst = LIB3DS.lib3ds_node_new_mesh_instance(mesh, "01", null, null, null);
LIB3DS.lib3ds_file_append_node(file, inst, null);
if (!LIB3DS.lib3ds_file_save(file, mSzOutputFilename))
{
LIB3DS.lib3ds_file_free(file);
return(false);
}
LIB3DS.lib3ds_file_free(file);
return(true);
}
