private static void AddMaterials(string fullFileName, ISceneEngine sceneEngine, string line, ref string mtlName, ActionResult <SceneElement> actionResult)
{
var currentDirectory = Environment.CurrentDirectory;
try
{
var fileInfo = new FileInfo(fullFileName);
if (line.StartsWith("mtllib") && fullFileName != null && fileInfo.Exists && fileInfo.Directory != null)
{
// Set current directory in case a relative path to material file is used.
// ReSharper disable once AssignNullToNotNullAttribute
Environment.CurrentDirectory = fileInfo.Directory.FullName;
// Load materials file.
var mtlPath = ReadMaterialValue(line);
if (!File.Exists(mtlPath))
{
actionResult.AddWarning(Resources.Message_AddMaterials_File_with_material_N_not_found, mtlPath);
return;
}
LoadMaterials(mtlPath, sceneEngine);
}
if (line.StartsWith("usemtl"))
{
mtlName = ReadMaterialValue(line);
}
}
finally
{
Environment.CurrentDirectory = currentDirectory;
}
}
private static void AddFace(ISceneEngine sceneEngine, Polygon polygon, string mtlName, string line, char[] split)
{
var face = new Face();
if (!string.IsNullOrWhiteSpace(mtlName))
{
face.Material = sceneEngine.GetAssets <Material>().FirstOrDefault(t => t.Name == mtlName);
}
// Get the face indices
string[] indices = line.Substring(2).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Add each index.
AddIndexesToFace(indices, face);
// Add the face.
polygon.Faces.Add(face);
}
private static void LoadGeometryFromFile(string fullFileName, ISceneEngine sceneEngine, Polygon polygon, ActionResult <SceneElement> actionResult)
{
var split = new[] { ' ' };
string mtlName = null;
using (var reader = new StreamReader(fullFileName))
{
string line;
while ((line = reader.ReadLine()) != null)
{
// Skip any comments (lines that start with '#').
if (line.StartsWith("#"))
{
continue;
}
if (line.StartsWith("vt")) //texture coordinate
{
AddTextureCoordinate(polygon, line, split);
continue;
}
if (line.StartsWith("vn")) //normal coordinate
{
AddNormal(polygon, line, split);
continue;
}
if (line.StartsWith("v")) //vertex
{
AddVertices(polygon, line, split);
continue;
}
if (line.StartsWith("f")) //Face
{
AddFace(sceneEngine, polygon, mtlName, line, split);
continue;
}
AddMaterials(fullFileName, sceneEngine, line, ref mtlName, actionResult);
}
}
}
/// <summary>
/// Load of 3D geometry from the file
/// </summary>
/// <param name="fullFileName">The path to the file with 3D geometry</param>
/// <param name="sceneEngine">The engine of the scene</param>
/// <returns></returns>
public ActionResult <SceneElement> LoadGeometry(string fullFileName, ISceneEngine sceneEngine)
{
var polygon = new Polygon();
var actionResult = new ActionResult <SceneElement>("Import Wavefront format geometry")
{
Value = polygon
};
if (!File.Exists(fullFileName))
{
actionResult.AddError(Resources.Message_LoadGeometry_File_N_not_found, fullFileName);
return(actionResult);
}
try
{
LoadGeometryFromFile(fullFileName, sceneEngine, polygon, actionResult);
}
catch (Exception e)
{
actionResult.AddError(e);
}
return(actionResult);
}
private static void LoadMaterials(string path, ISceneEngine sceneEngine)
{
// Create a stream reader.
using (var reader = new StreamReader(path))
{
Material mtl = null;
float alpha = 1;
// Read line by line.
string line;
while ((line = reader.ReadLine()) != null)
{
line = line.Trim();
// Skip any comments (lines that start with '#').
if (line.StartsWith("#"))
continue;
// newmatl indicates start of material definition.
if (line.StartsWith("newmtl"))
{
// Add new material to scene's assets.
mtl = new Material();
sceneEngine.AddAsset(mtl);
// Name of material is on same line, immediately follows newmatl.
mtl.Name = ReadMaterialValue(line);
// Reset assumed alpha.
alpha = 1;
}
// Read properties of material.
if (mtl != null)
{
if (line.StartsWith("Ka"))
mtl.Ambient = ReadMaterialColor(line, alpha);
else if (line.StartsWith("Kd"))
mtl.Diffuse = ReadMaterialColor(line, alpha);
else if (line.StartsWith("Ks"))
mtl.Specular = ReadMaterialColor(line, alpha);
else if (line.StartsWith("Ns"))
mtl.Shininess = Convert.ToSingle(ReadMaterialValue(line));
else if (line.StartsWith("map_Ka") ||
line.StartsWith("map_Kd") ||
line.StartsWith("map_Ks"))
{
// Get texture map.
string textureFile = ReadMaterialValue(line);
// Set texture for material.
mtl.Texture = sceneEngine.LoadOrCreateTexture(path, textureFile);
}
else if (line.StartsWith("d") || line.StartsWith("Tr"))
{
alpha = Convert.ToSingle(ReadMaterialValue(line));
SetAlphaForMaterial(mtl, alpha);
}
// TODO: Handle illumination mode (illum)
}
}
}
}
private static void AddFace(ISceneEngine sceneEngine, Polygon polygon, string mtlName, string line, char[] split)
{
var face = new Face();
if (!string.IsNullOrWhiteSpace(mtlName))
face.Material = sceneEngine.GetAssets<Material>().FirstOrDefault(t => t.Name == mtlName);
// Get the face indices
string[] indices = line.Substring(2).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Add each index.
AddIndexesToFace(indices, face);
// Add the face.
polygon.Faces.Add(face);
}
private static void AddMaterials(string fullFileName, ISceneEngine sceneEngine, string line, ref string mtlName, ActionResult<SceneElement> actionResult)
{
var currentDirectory = Environment.CurrentDirectory;
try
{
var fileInfo = new FileInfo(fullFileName);
if (line.StartsWith("mtllib") && fullFileName != null && fileInfo.Exists && fileInfo.Directory != null)
{
// Set current directory in case a relative path to material file is used.
// ReSharper disable once AssignNullToNotNullAttribute
Environment.CurrentDirectory = fileInfo.Directory.FullName;
// Load materials file.
var mtlPath = ReadMaterialValue(line);
if (!File.Exists(mtlPath))
{
actionResult.AddWarning(Resources.Message_AddMaterials_File_with_material_N_not_found, mtlPath);
return;
}
LoadMaterials(mtlPath, sceneEngine);
}
if (line.StartsWith("usemtl"))
mtlName = ReadMaterialValue(line);
}
finally
{
Environment.CurrentDirectory = currentDirectory;
}
}
private static void LoadGeometryFromFile(string fullFileName, ISceneEngine sceneEngine, Polygon polygon, ActionResult<SceneElement> actionResult)
{
var split = new[] {' '};
string mtlName = null;
using (var reader = new StreamReader(fullFileName))
{
string line;
while ((line = reader.ReadLine()) != null)
{
// Skip any comments (lines that start with '#').
if (line.StartsWith("#"))
continue;
if (line.StartsWith("vt")) //texture coordinate
{
AddTextureCoordinate(polygon, line, split);
continue;
}
if (line.StartsWith("vn")) //normal coordinate
{
AddNormal(polygon, line, split);
continue;
}
if (line.StartsWith("v")) //vertex
{
AddVertices(polygon, line, split);
continue;
}
if (line.StartsWith("f")) //Face
{
AddFace(sceneEngine, polygon, mtlName, line, split);
continue;
}
AddMaterials(fullFileName, sceneEngine, line, ref mtlName, actionResult);
}
}
}
/// <summary>
/// Load of 3D geometry from the file
/// </summary>
/// <param name="fullFileName">The path to the file with 3D geometry</param>
/// <param name="sceneEngine">The engine of the scene</param>
/// <returns></returns>
public ActionResult<SceneElement> LoadGeometry(string fullFileName, ISceneEngine sceneEngine)
{
var polygon = new Polygon();
var actionResult = new ActionResult<SceneElement>("Import Wavefront format geometry") {Value = polygon};
if (!File.Exists(fullFileName))
{
actionResult.AddError(Resources.Message_LoadGeometry_File_N_not_found, fullFileName);
return actionResult;
}
try
{
LoadGeometryFromFile(fullFileName, sceneEngine, polygon, actionResult);
}
catch (Exception e)
{
actionResult.AddError(e);
}
return actionResult;
}
public void Init()
{
_sceneEngine = new SceneEngine();
}
public void Init()
{
_sceneEngine = new SceneEngine();
}
private static void LoadMaterials(string path, ISceneEngine sceneEngine)
{
// Create a stream reader.
using (var reader = new StreamReader(path))
{
Material mtl = null;
float alpha = 1;
// Read line by line.
string line;
while ((line = reader.ReadLine()) != null)
{
line = line.Trim();
// Skip any comments (lines that start with '#').
if (line.StartsWith("#"))
{
continue;
}
// newmatl indicates start of material definition.
if (line.StartsWith("newmtl"))
{
// Add new material to scene's assets.
mtl = new Material();
sceneEngine.AddAsset(mtl);
// Name of material is on same line, immediately follows newmatl.
mtl.Name = ReadMaterialValue(line);
// Reset assumed alpha.
alpha = 1;
}
// Read properties of material.
if (mtl != null)
{
if (line.StartsWith("Ka"))
{
mtl.Ambient = ReadMaterialColor(line, alpha);
}
else if (line.StartsWith("Kd"))
{
mtl.Diffuse = ReadMaterialColor(line, alpha);
}
else if (line.StartsWith("Ks"))
{
mtl.Specular = ReadMaterialColor(line, alpha);
}
else if (line.StartsWith("Ns"))
{
mtl.Shininess = Convert.ToSingle(ReadMaterialValue(line));
}
else if (line.StartsWith("map_Ka") ||
line.StartsWith("map_Kd") ||
line.StartsWith("map_Ks"))
{
// Get texture map.
string textureFile = ReadMaterialValue(line);
// Set texture for material.
mtl.Texture = sceneEngine.LoadOrCreateTexture(path, textureFile);
}
else if (line.StartsWith("d") || line.StartsWith("Tr"))
{
alpha = Convert.ToSingle(ReadMaterialValue(line));
SetAlphaForMaterial(mtl, alpha);
}
// TODO: Handle illumination mode (illum)
}
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="SceneContent" />
/// </summary>
/// <param name="sceneEngine">The <see cref="ISceneEngine" /> performing operations with the scene.</param>
public SceneContent(ISceneEngine sceneEngine)
{
SceneEngine = sceneEngine;
Navigator = ServiceLocator.Get <SceneNavigationFactory>().Create();
Navigator.Move += (s, e) => SceneEngine.Move(e.X, e.Y, e.Z);
}
