public void DrawFace(WavefrontObject meshObj, WavefrontFace face, Shader shader)
{
//WavefontFace是一个triangle fan
//可能会有多个三角形;这些三角形共用第一个顶点做v0
if (face.Vertices.Count < 3)
{
Debug.Assert(false);
return;
}
Vertex vertex0 = Vertex.FromWavefrontVertex(meshObj, face.Vertices[0]);
VSOutput vClip0 = shader.VertShader(vertex0);
context.statics.vertexCount += 1;
for (int i = 1; i + 1 < face.Vertices.Count; i += 1)
{
Vertex vertex1 = Vertex.FromWavefrontVertex(meshObj, face.Vertices[i]);
Vertex vertex2 = Vertex.FromWavefrontVertex(meshObj, face.Vertices[i + 1]);
//顶点着色器
VSOutput vClip1 = shader.VertShader(vertex1);
VSOutput vClip2 = shader.VertShader(vertex2);
context.statics.vertexCount += 2;
DrawTriangle(vClip0, vClip1, vClip2);
}
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material newMaterial = new Material(_materialName, _fileName);
wavefrontObject.Materials.Add(_materialName, newMaterial);
wavefrontObject.CurrentMaterial = newMaterial;
}
/*
* public void DrawGameObject(GameObject gameobject, Shader shader)
* {
* context.statics.meshCount += 1;
*
* //设置Shader相关
* Transform transform = gameobject.transform;
* Matrix4x4 modelMatrix = transform.ModelToWorld;
* shader.SetModelMatrix(modelMatrix);
*
* Texture texture = gameobject.texture;
* shader.texture = texture;
* rasterizer.shader = shader;
*
* WavefrontObject meshObj = gameobject.meshObj;
*
* foreach( var faceGroup in meshObj.Groups)
* {
* context.statics.submeshCount += 1;
* //faceGroup相当于submesh
* foreach( var face in faceGroup.Faces )
* {
* //face为triangle fan;可能会有多个三角形
* Debug.Assert(face.Vertices.Count > 2);
* Vertex vertex0 = Vertex.FromWavefrontVertex(meshObj, face.Vertices[0]);
* context.statics.vertexCount += 1;
* VSOutput vClip0 = shader.VertShader(vertex0);
* //TODO 做Clipping
* VSOutput vNDC0 = Rasterizer.PerspectiveDivide(vClip0);
* if(vNDC0 == null)
* {
* continue;
* }
* VSOutput vScreen0 = rasterizer.ViewportTransform(vNDC0);
*
* for ( int i = 1; i+1 < face.Vertices.Count; i+=1)
* {
* context.statics.vertexCount += 2;
* Vertex vertex1 = Vertex.FromWavefrontVertex(meshObj, face.Vertices[i]);
* Vertex vertex2 = Vertex.FromWavefrontVertex(meshObj, face.Vertices[i+1]);
*
* VSOutput vClip1 = shader.VertShader(vertex1);
* VSOutput vClip2 = shader.VertShader(vertex2);
* if (!FrontEndCulling(vClip0, vClip1, vClip2))
* {
* continue;
* }
*
* VSOutput vNDC1 = Rasterizer.PerspectiveDivide(vClip1);
* VSOutput vNDC2 = Rasterizer.PerspectiveDivide(vClip2);
* if(vNDC1 == null || vNDC2 == null)
* {
* continue;
* }
* VSOutput vScreen1 = rasterizer.ViewportTransform(vNDC1);
* VSOutput vScreen2 = rasterizer.ViewportTransform(vNDC2);
*
* context.statics.triangleCount += 1;
* rasterizer.RasterizeTriangle(vScreen0, vScreen1, vScreen2);
* }
* }
*
* }
*
* rasterizer.shader = null;
*
*
*
* }
*/
public void DrawGameObject(GameObject gameobject, Shader shader)
{
WavefrontObject meshObj = gameobject.meshObj;
if (meshObj == null)
{
return;
}
context.statics.meshCount += 1;
//设置Shader相关
Transform transform = gameobject.transform;
Matrix4x4 modelMatrix = transform.ModelToWorld;
shader.SetModelMatrix(modelMatrix);
Texture texture = gameobject.texture;
shader.texture = texture;
rasterizer.shader = shader;
foreach (var faceGroup in meshObj.Groups)
{
context.statics.submeshCount += 1;
//faceGroup相当于submesh
foreach (var face in faceGroup.Faces)
{
DrawFace(meshObj, face, shader);
}
}
rasterizer.shader = null;
}
private static Mesh CreateMesh(WavefrontObject obj)
{
var builder = new MeshBuilder(obj);
foreach (var objGroup in obj.Groups)
{
foreach (var face in objGroup.Faces)
{
builder.SetMaterial(face.Material);
// TODO: add support for Concave faces (triangles done this way might overlap)
// RH
// 1st face => vertex 0, 1, 2
// 2nd face => vertex 0, 2, 3
// 3rd face => vertex 0, 4, 5
// 4th face => ...
var vertices = face.Vertices;
// more than 3 vertices per face, we need to triangulate the face to be able to use it in the engine.
for (var i = 2; i < vertices.Length; ++i)
{
builder.AddVertex(vertices[0]);
//Flip the order to convert from RH to LH (d3d)
builder.AddVertex(vertices[i]);
builder.AddVertex(vertices[i - 1]);
}
}
}
return(builder.Build());
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material newMaterial = new Material(_materialName, _fileName);
wavefrontObject.Materials.Add(_materialName, newMaterial);
wavefrontObject.CurrentMaterial = newMaterial;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Group group = wavefrontObject.CurrentGroup;
if (group == null)
{
group = new Group();
wavefrontObject.Groups.Add(group);
wavefrontObject.CurrentGroup = group;
}
if (vertices.Length == 3)
{
// Add list of vertex/normal/texcoord to current group
// Each object keeps a list of its own data, apart from the global list
group.Vertices.Add(this.vertices[0]);
group.Vertices.Add(this.vertices[1]);
group.Vertices.Add(this.vertices[2]);
group.Normals.Add(this.normals[0]);
group.Normals.Add(this.normals[1]);
group.Normals.Add(this.normals[2]);
group.TextureCoordinates.Add(this.textures[0]);
group.TextureCoordinates.Add(this.textures[1]);
group.TextureCoordinates.Add(this.textures[2]);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++); // create index list for current object
}
else
{
// Add list of vertex/normal/texcoord to current group
// Each object keeps a list of its own data, apart from the global list
group.Vertices.Add(this.vertices[0]);
group.Vertices.Add(this.vertices[1]);
group.Vertices.Add(this.vertices[2]);
group.Vertices.Add(this.vertices[3]);
group.Normals.Add(this.normals[0]);
group.Normals.Add(this.normals[1]);
group.Normals.Add(this.normals[2]);
group.Normals.Add(this.normals[3]);
group.TextureCoordinates.Add(this.textures[0]);
group.TextureCoordinates.Add(this.textures[1]);
group.TextureCoordinates.Add(this.textures[2]);
group.TextureCoordinates.Add(this.textures[3]);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++); // create index list for current object
}
face.VertexIndices = vindices;
face.NormalIndices = nindices;
face.TextureIndices = tindices;
face.Normals = normals;
face.Vertices = vertices;
face.TextureCoordinates = textures;
wavefrontObject.CurrentGroup.AddFace(face);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Group group = wavefrontObject.CurrentGroup;
if (group == null)
{
group = new Group();
wavefrontObject.Groups.Add(group);
wavefrontObject.CurrentGroup = group;
}
if (_vertices.Length == 3)
{
// Add list of vertex/normal/texcoord to current group.
// Each object keeps a list of its own data, apart from the global list.
group.Vertices.Add(_vertices[0]);
group.Vertices.Add(_vertices[1]);
group.Vertices.Add(_vertices[2]);
group.Normals.Add(_normals[0]);
group.Normals.Add(_normals[1]);
group.Normals.Add(_normals[2]);
group.TextureCoordinates.Add(_textures[0]);
group.TextureCoordinates.Add(_textures[1]);
group.TextureCoordinates.Add(_textures[2]);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++); // create index list for current object
}
else
{
// Add list of vertex/normal/texcoord to current group.
// Each object keeps a list of its own data, apart from the global list.
group.Vertices.Add(_vertices[0]);
group.Vertices.Add(_vertices[1]);
group.Vertices.Add(_vertices[2]);
group.Vertices.Add(_vertices[3]);
group.Normals.Add(_normals[0]);
group.Normals.Add(_normals[1]);
group.Normals.Add(_normals[2]);
group.Normals.Add(_normals[3]);
group.TextureCoordinates.Add(_textures[0]);
group.TextureCoordinates.Add(_textures[1]);
group.TextureCoordinates.Add(_textures[2]);
group.TextureCoordinates.Add(_textures[3]);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++);
group.Indices.Add(group.IndexCount++); // create index list for current object
}
_face.VertexIndices = _vindices;
_face.NormalIndices = _nindices;
_face.TextureIndices = _tindices;
_face.Normals = _normals;
_face.Vertices = _vertices;
_face.TextureCoordinates = _textures;
wavefrontObject.CurrentGroup.AddFace(_face);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
if (wavefrontObject.CurrentGroup != null)
wavefrontObject.CurrentGroup.Pack();
wavefrontObject.Groups.Add(_newGroup);
wavefrontObject.CurrentGroup = _newGroup;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
if (wavefrontObject.CurrentGroup != null)
{
wavefrontObject.CurrentGroup.Pack();
}
wavefrontObject.Groups.Add(_newGroup);
wavefrontObject.CurrentGroup = _newGroup;
}
public MtlLineParserFactory(WavefrontObject @object)
: base(@object)
{
Parsers.Add("newmtl", new MaterialParser());
Parsers.Add("Ka", new KaParser());
Parsers.Add("Kd", new KdParser());
Parsers.Add("Ks", new KsParser());
Parsers.Add("Ns", new NsParser());
Parsers.Add("map_Kd", new KdMapParser(@object));
Parsers.Add("#", new CommentParser());
}
public MtlLineParserFactory(WavefrontObject @object)
: base(@object)
{
Parsers.Add("newmtl", new MaterialParser());
Parsers.Add("Ka", new AmbientColorParser());
Parsers.Add("Kd", new DiffuseColorParser());
Parsers.Add("Ks", new SpecularColorParser());
Parsers.Add("Ns", new SpecularExponentParser());
Parsers.Add("map_Kd", new TextureNameParser(@object));
Parsers.Add("#", new CommentParser());
}
public void CanParseStyle7()
{
WavefrontObject wavefrontObject = new WavefrontObject();
wavefrontObject.Vertices.Add(new Vector3());
wavefrontObject.Normals.Add(new Vector3());
const string line = "f 1 1 1";
FaceParser parser = (FaceParser) new ObjLineParserFactory(wavefrontObject).GetLineParser(line);
parser.Parse();
}
public MtlLineParserFactory(WavefrontObject @object)
: base(@object)
{
Parsers.Add("newmtl", new MaterialParser());
Parsers.Add("Ka", new KaParser());
Parsers.Add("Kd", new KdParser());
Parsers.Add("Ks", new KsParser());
Parsers.Add("Ns", new NsParser());
Parsers.Add("map_Kd", new KdMapParser(@object));
Parsers.Add("#", new CommentParser());
}
public ObjLineParserFactory(WavefrontObject @object)
: base(@object)
{
Parsers.Add("v", new VertexParser());
Parsers.Add("vn", new NormalParser());
Parsers.Add("vp", new FreeFormParser());
Parsers.Add("vt", new TextureCoordinateParser());
Parsers.Add("f", new FaceParser(@object));
Parsers.Add("#", new CommentParser());
Parsers.Add("mtllib", new MaterialFileParser(@object));
Parsers.Add("usemtl", new MaterialParser());
Parsers.Add("g", new GroupParser());
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
if (!wavefrontObject.Materials.ContainsKey(_materialName))
return;
Material newMaterial = wavefrontObject.Materials[_materialName];
// CurrentGroup could be null at this point - this is allowed by the OBJ spec.
if (wavefrontObject.CurrentGroup == null)
wavefrontObject.CurrentGroup = new Group();
wavefrontObject.CurrentGroup.Material = newMaterial;
}
public void CanParseStyle6()
{
// Arrange.
WavefrontObject wavefrontObject = new WavefrontObject();
wavefrontObject.Vertices.Add(new Vertex());
wavefrontObject.Normals.Add(new Vertex());
const string line = "f 1/1 1/1 1/1 1/1";
FaceParser parser = (FaceParser) new ObjLineParserFactory(wavefrontObject).GetLineParser(line);
// Act.
parser.Parse();
}
public ObjLineParserFactory(WavefrontObject @object)
: base(@object)
{
Parsers.Add("v", new VertexParser());
Parsers.Add("vn", new NormalParser());
Parsers.Add("vp", new FreeFormParser());
Parsers.Add("vt", new TextureCoordinateParser());
Parsers.Add("f", new FaceParser(@object));
Parsers.Add("#", new CommentParser());
Parsers.Add("mtllib", new MaterialFileParser(@object));
Parsers.Add("usemtl", new MaterialParser());
Parsers.Add("g", new GroupParser());
}
//材质
//public static Material mat = new Material(new Color(0, 0, 0.1f), 0.1f, new Color(0.3f, 0.3f, 0.3f), new Color(1, 1, 1), 99);
public static WavefrontObject ToWavefrontObject()
{
WavefrontObject obj = new WavefrontObject();
for (int i = 0; i < CubeTestData.pointList.Length; ++i)
{
Vector3 point = CubeTestData.pointList[i];
obj.Positions.Add(point);
}
for (int i = 0; i < CubeTestData.normals.Length; ++i)
{
Vector3 normal = CubeTestData.normals[i];
obj.Normals.Add(normal);
}
for (int i = 0; i < CubeTestData.uvs.Length; ++i)
{
Vector2 uv = CubeTestData.uvs[i];
obj.Texcoords.Add(uv);
}
for (int i = 0; i < CubeTestData.vertColors.Length; ++i)
{
Vector4 color = new Vector4(CubeTestData.vertColors[i], 1);
obj.Colors.Add(color);
}
//处理三角形
WavefrontFaceGroup faceGroup = new WavefrontFaceGroup();
obj.Groups.Add(faceGroup);
for (int i = 0; i + 2 < CubeTestData.indexs.Length; i += 3)
{
WavefrontFace face = new WavefrontFace();
faceGroup.Faces.Add(face);
int index0 = i;
int index1 = i + 1;
int index2 = i + 2;
int p0 = CubeTestData.indexs[i];
int p1 = CubeTestData.indexs[i + 1];
int p2 = CubeTestData.indexs[i + 2];
WavefrontVertex v0 = new WavefrontVertex(p0 + 1, index0 + 1, index0 + 1);
WavefrontVertex v1 = new WavefrontVertex(p1 + 1, index1 + 1, index1 + 1);
WavefrontVertex v2 = new WavefrontVertex(p2 + 1, index2 + 1, index2 + 1);
v0.Color = index0 + 1;
v1.Color = index1 + 1;
v2.Color = index2 + 1;
face.Vertices.Add(v0);
face.Vertices.Add(v1);
face.Vertices.Add(v2);
}
return(obj);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
if (!wavefrontObject.Materials.ContainsKey(_materialName))
{
return;
}
Material newMaterial = wavefrontObject.Materials[_materialName];
// CurrentGroup could be null at this point - this is allowed by the OBJ spec.
if (wavefrontObject.CurrentGroup == null)
{
wavefrontObject.CurrentGroup = new Group();
}
wavefrontObject.CurrentGroup.Material = newMaterial;
}
public static Vertex FromWavefrontVertex(WavefrontObject obj, WavefrontVertex v)
{
Vertex vertex = new Vertex();
vertex.position = new Vector4(obj.Positions[v.Position - 1], 1f);
if (v.Normal > 0)
{
vertex.normal = new Vector4(obj.Normals[v.Normal - 1], 0f);
}
vertex.texcoord = obj.Texcoords[v.Texcoord - 1];
if (v.Color >= 0 && v.Color < obj.Colors.Count)
{
vertex.color = obj.Colors[v.Color - 1];
}
else
{
vertex.color = Vector4.One;
}
return(vertex);
}
public MaterialFileParser(WavefrontObject @object)
{
_object = @object;
_parserFactory = new MtlLineParserFactory(@object);
}
protected LineParserFactory(WavefrontObject @object)
{
Object = @object;
}
public KdMapParser(WavefrontObject @object)
{
_object = @object;
}
public FaceParser(WavefrontObject @object)
{
_object = @object;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.Shininess = _ns;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.Ka = _ka;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
wavefrontObject.Textures.Add(_coordinate);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
wavefrontObject.Textures.Add(_coordinate);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
MaterialBase currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.AmbientColor = _ambientColor;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
}
public MaterialFileParser(WavefrontObject @object)
{
_object = @object;
parserFactory = new MtlLineParserFactory(@object);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
MaterialBase currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.SpecularExponent = _specularExponent;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
// Material are directly added by the parser, no need to do anything here...
}
protected LineParserFactory(WavefrontObject @object)
{
Object = @object;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.Shininess = _ns;
}
public override Scene ImportFile(FileStream fileStream, string fileName)
{
WavefrontObject wavefrontObject = WavefrontObject.Load(fileName);
Material defaultMaterial = new Material
{
Name = "Default",
DiffuseColor = ColorsRgbF.Gray,
SpecularColor = ColorsRgbF.White,
Shininess = 64
};
Scene scene = new Scene();
foreach (Group g in wavefrontObject.Groups)
{
Mesh mesh = new Mesh();
scene.Meshes.Add(mesh);
Objects.Material gm = g.Material;
Material material;
if (gm != null)
{
material = new Material
{
Name = gm.Name,
FileName = gm.FileName
};
// material.Ambient
if (!string.IsNullOrEmpty(gm.TextureName))
{
material.DiffuseTextureName = gm.TextureName;
}
else
{
material.DiffuseColor = (gm.Kd != null)
? new ColorRgbF(gm.Kd.X, gm.Kd.Y, gm.Kd.Z)
: ColorsRgbF.Gray;
}
material.SpecularColor = (gm.Ks != null)
? new ColorRgbF(gm.Ks.X, gm.Ks.Y, gm.Ks.Z)
: ColorsRgbF.Black;
material.Shininess = (int)gm.Shininess; // TODO: Check
}
else
{
material = defaultMaterial;
}
mesh.Material = material;
if (!scene.Materials.Contains(material))
{
scene.Materials.Add(material);
}
// Currently this is not utilising indices.
int counter = 0;
foreach (Face f in g.Faces)
{
// Copy normals.
foreach (int normalIndex in f.NormalIndices)
{
Vertex n = wavefrontObject.Normals[normalIndex];
mesh.Normals.Add(new Vector3D(n.X, n.Y, n.Z));
}
// Copy normals.
foreach (int textureIndex in f.TextureIndices)
{
TextureCoordinate tc = wavefrontObject.Textures[textureIndex];
mesh.TextureCoordinates.Add(new Point3D(tc.U, tc.V, tc.W));
}
switch (f.Type)
{
case FaceType.Triangles:
// Copy positions.
foreach (int vertexIndex in f.VertexIndices)
{
Vertex v = wavefrontObject.Vertices[vertexIndex];
mesh.Positions.Add(new Point3D(v.X, v.Y, v.Z));
}
mesh.Indices.Add(counter++);
mesh.Indices.Add(counter++);
mesh.Indices.Add(counter++);
//mesh.Indices.AddRange(f.VertexIndices);
break;
default:
throw new NotSupportedException();
}
}
/*foreach (Vertex v in wavefrontObject.Vertices)
* mesh.Positions.Add(new Point3D(v.X, v.Y, v.Z));
*
* foreach (Vertex v in wavefrontObject.Normals)
* mesh.Normals.Add(new Vector3D(v.X, v.Y, v.Z));
*
* foreach (TextureCoordinate tc in wavefrontObject.Textures)
* mesh.TextureCoordinates.Add(new Point3D(tc.U, tc.V, 0));*/
}
return(scene);
}
public abstract void IncorporateResults(WavefrontObject wavefrontObject);
public TexturedVertexMapper(WavefrontObject model)
{
_model = model;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
wavefrontObject.Normals.Add(_normal);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.Kd = _kd;
}
public KdMapParser(WavefrontObject @object)
{
_object = @object;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
wavefrontObject.Vertices.Add(_vertex);
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.TextureName = _fullTextureFileName;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
Material currentMaterial = wavefrontObject.CurrentMaterial;
currentMaterial.TextureName = _fullTextureFileName;
}
public override void IncorporateResults(WavefrontObject wavefrontObject)
{
// Material are directly added by the parser, no need to do anything here...
}
public MeshBuilder(WavefrontObject obj)
{
_obj = obj;
}
public abstract void IncorporateResults(WavefrontObject wavefrontObject);