public static void Export(List <Group> groups, Lib3dsFile destination)
{
for (int i = 0; i < groups.Count; i++)
{
var group = groups[i];
var material = new Lib3dsMaterial();
material.name = group[ModelField.GroupName].ToString();
destination.materials.Add(material);
group = group.TextureGroup[0];
material.ambient = (float[])group[ModelField.MaterialAmbient];
material.diffuse = (float[])group[ModelField.MaterialAmbient];
material.transparency = 1.0f - material.ambient[3];
var textureId = (int)group[ModelField.Texture];
if (textureId != -1)
{
material.texture1_map.name = $"..\\Texture\\{textureId}.png";
material.texture1_map.percent = 1.0f;
material.texture1_map.scale[0] = (float)group[ModelField.TextureDivisionU];
material.texture1_map.scale[1] = (float)group[ModelField.TexturePositionV];
material.texture1_map.offset[0] = (float)group[ModelField.TexturePositionU];
material.texture1_map.offset[1] = (float)group[ModelField.TexturePositionV];
material.texture1_map.flags = Lib3dsTextureMapFlags.LIB3DS_TEXTURE_SUMMED_AREA;
}
}
}
private P3DMaterial MaterialFrom3DS(Lib3dsMaterial material, bool hasSmoothing)
{
if (!hasSmoothing)
{
return(P3DMaterial.MAT_FLAT);
}
if ((Math.Abs(material.self_illum) > 0.0001) ||
(material.ambient[0] == 1.0 && material.ambient[1] == 1.0 && material.ambient[2] == 1.0))
{
return(P3DMaterial.MAT_SHINING);
}
if (material.reflection_map.name != String.Empty)
{
return(P3DMaterial.MAT_GORAUD_METAL_ENV);
}
return(P3DMaterial.MAT_GORAUD);
}
private int GetMaterialForNameAndType(string name, P3DMaterial type, Lib3dsFile file)
{
Lib3dsMaterial mat = LIB3DS.lib3ds_material_new(name);
mat.texture1_map = new Lib3dsTextureMap();
mat.texture1_map.name = name;
mat.diffuse[0] = 0.9f;
mat.diffuse[1] = 0.9f;
mat.diffuse[2] = 0.9f;
// if (type == P3DMaterial.MAT_FLAT)
// {
// mat.diffuse[0] = 0.9f;
// mat.diffuse[1] = 0.9f;
// mat.diffuse[2] = 0.9f;
// }
// else if (type == P3DMaterial.MAT_GORAUD)
// {
// mat.diffuse[0] = 0.9f;
// mat.diffuse[1] = 0f;
// mat.diffuse[2] = 0f;
// }
// else if (type == P3DMaterial.MAT_GORAUD_METAL_ENV)
// {
// mat.diffuse[0] = 0f;
// mat.diffuse[1] = 0f;
// mat.diffuse[2] = 0.9f;
// }
// else
// {
// mat.diffuse[0] = 0f;
// mat.diffuse[1] = 0.9f;
// mat.diffuse[2] = 0f;
// }
LIB3DS.lib3ds_file_insert_material(file, mat, -1);
return(counter);
}
//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);
}
