public Vertex(Vertex vertex)
{
this.position = vertex.position;
this.color = vertex.color;
this.texture = vertex.texture;
this.normal = vertex.normal;
}
public Triangle(Vertex[] vertices)
{
this.vertices = new Vertex[3];
for (int i = 0; i < vertices.Length; i++)
this.vertices[i] = vertices[i];
}
public HalfEdge(Vertex origin, Vertex dest)
{
this.origin = origin;
/*
twin = new HalfEdge();
twin.origin = dest;
twin.twin = this;*/
}
public Cylinder(float radius, float height, int faces, Vector4 color, ProgramObject program)
: base(1, program)
{
float step = 2 * (float)Math.PI / faces;
float theta = (float) Math.PI / 4;
Vertex[] base_vertices = new Vertex[faces];
for (int i = 0; i < faces; i++, theta += step)
{
float x = radius * (float)Math.Cos(theta);
float y = radius * (float)Math.Sin(theta);
base_vertices[i] = new Vertex(x, y, 0, 1f);
base_vertices[i].color = color;
// Bottom normal pointing down and its texture
base_vertices[i].normal = new Vector4(x, y, -100f, 0f);
base_vertices[i].texture = new Vector4(new Vector2((184 + 128 * (float)Math.Cos(theta)) / 500, (188 + 128 * (float)Math.Sin(theta)) / 375));
//Console.WriteLine(base_vertices[i].texture.ToString());
}
Vector2[][] textures = new Vector2[faces][];
float mapping_step = (float) 1 / faces;
Console.WriteLine("Start");
for (int i = 0; i < faces; i++)
{
textures[i] = new Vector2[4];
textures[i][0] = new Vector2(mapping_step * i, 0);
textures[i][1] = new Vector2(mapping_step * (i + 1), 0);
textures[i][2] = new Vector2(mapping_step * i, 1f);
textures[i][3] = new Vector2(mapping_step * (i + 1), 1f);
Console.WriteLine(textures[i].ToString());
}
Console.WriteLine("Finish");
createSweep(
base_vertices,
color,
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.CreateTranslation(new Vector3(0f, 0f, height));
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
),
textures
);
}
public Foot(float height, int num_steps, ProgramObject program)
: base(num_steps, program)
{
Vertex[] vertices = new Vertex[]{
new Vertex(new Vector4(1f, -1f, 0, 1f)),
new Vertex(new Vector4(1f, 1f, 0, 1f)),
new Vertex(new Vector4(-1f, 1f, 0, 1f)),
new Vertex(new Vector4(-1f, -1f, 0, 1f)),
};
Vector2[][] textures = new Vector2[vertices.Length][];
for (int i = 0; i < vertices.Length; i+=2)
{
textures[i] = new Vector2[4];
textures[i][0] = new Vector2((i % 2) / 2, 0);
textures[i][1] = new Vector2((i % 2) / 2 + 0.75f, 0);
textures[i][2] = new Vector2((i % 2) / 2, 1f);
textures[i][3] = new Vector2((i % 2) / 2 + 0.75f, 1f);
}
for (int i = 1; i < vertices.Length; i+= 2)
{
textures[i] = new Vector2[4];
textures[i][0] = new Vector2((i % 2) / 2 + 0.75f, 0);
textures[i][1] = new Vector2(1f, 0);
textures[i][2] = new Vector2((i % 2) / 2 + 0.75f, 1f);
textures[i][3] = new Vector2(1f, 1f);
}
float height_step = height / num_steps;
createSweep(vertices, new Vector4(0, 1f, 0, 1f),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.CreateTranslation(new Vector3(0, 0, (current + 1) * height_step));
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
current++;
float pend = 4 * 0.5f / (float)Math.Pow(steps * 0.1f, 2);
float scale_factor = (float)(pend * Math.Pow(current * 0.1f - steps * 0.1f / 2f, 2) + 0.5f);
return Matrix4.Scale(scale_factor, scale_factor, 1f);
}
)
, textures);
}
public void createSweep(Vertex[] face_vertices, Vector4 color, Func<int, int, Matrix4> translation_step,
Func<int, int, Matrix4> rotation_step, Func<int, int, Matrix4> scale_step,Vector2[][] textures)
{
this.translation_step = translation_step;
this.textures = textures;
polynet.addFace(face_vertices);
Vertex[] backwards = new Vertex[face_vertices.Length];
backwards[0] = face_vertices[0];
for (int i = 1; i < backwards.Length; i++)
{
backwards[i] = face_vertices[backwards.Length - i];
}
firstFace = backwards;
Vertex[] currentFace = backwards;
Vertex[] nextFace = new Vertex[backwards.Length];
// For each division
for (int i = 0; i < steps; i++)
{
Matrix4 transform = translation_step(i, steps) * scale_step(i, steps);
// Generate next section
nextFace = new Vertex[backwards.Length];
for (int j = 0; j < backwards.Length; j++)
{
Vertex new_vertex = new Vertex(Vector4.Transform(backwards[j].position, transform), color, backwards[j].texture);
nextFace[j] = new_vertex;
}
// Generate Faces
for (int j = 0; j < backwards.Length; j++)
{
Vertex[] v = new Vertex[]{
currentFace[j],
currentFace[(j + 1) % backwards.Length],
nextFace[(j + 1) % backwards.Length],
nextFace[j],
};
polynet.addFace(v);
}
currentFace = nextFace;
}
tapa = currentFace;
polynet.addFace(tapa);
// Fill ArrayBuffer
triangulate();
base.fillArrayBuffer();
}
public Cover(float height, float width, float lenght,float radius, int num_steps, ProgramObject program)
: base(num_steps, program)
{
float x = width / 2;
float y = lenght / 2;
Vertex[] vertices = new Vertex[]{
new Vertex(-x, -y + radius, 0, 1.0f),
new Vertex(-x + radius, -y, 0, 1.0f),
new Vertex(x - radius, -y, 0, 1.0f),
new Vertex(x, -y + radius, 0, 1.0f),
new Vertex(x, y - radius, 0, 1.0f),
new Vertex(x - radius, y, 0, 1),
new Vertex(-x + radius, y, 0, 1.0f),
new Vertex(-x, y - radius, 0, 1.0f)
};
Vector2[][] textures = new Vector2[vertices.Length][];
for (int i = 0; i < vertices.Length; i++)
{
textures[i] = new Vector2[4];
textures[i][0] = new Vector2((i % 2) / 2, 0);
textures[i][1] = new Vector2((i % 2) / 2 + 0.5f, 0);
textures[i][2] = new Vector2((i % 2) / 2, 1f);
textures[i][3] = new Vector2((i % 2) / 2 + 0.5f, 1f);
}
float height_step = height / num_steps;
createSweep(vertices, new Vector4(0, 1f, 0, 1f),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.CreateTranslation(new Vector3(0, 0, height_step));
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
)
, textures);
}
public static Vector4[] singleVector4Array(Vertex[] array)
{
Vector4[] toRet = new Vector4[4 * array.Length];
int count = array.Length;
for (int i = 0; i < array.Length; i++)
{
toRet[i] = array[i].position;
toRet[i + count] = array[i].normal;
toRet[i + count * 2] = array[i].color;
toRet[i + count * 3] = array[i].texture;
}
return toRet;
}
public void addFace(Vertex[] vertices)
{
HalfEdge[] currentHalfEdges = new HalfEdge[vertices.Length];
//add halfedges
for (int curr = 0; curr < vertices.Length; curr++)
{
int next_he = (curr + 1) % vertices.Length;
// look if half-edge already exists
HalfEdge exist = existHalfEdge(vertices[curr], vertices[next_he]);
// if it does, add it to the array, otherwise create it
if (exist == null)
{
// create half edge from current to next vertex
currentHalfEdges[curr] = new HalfEdge(vertices[curr], vertices[next_he]);
HalfEdge twin = new HalfEdge(vertices[next_he],vertices[curr]);
currentHalfEdges[curr].twin = twin;
twin.twin = currentHalfEdges[curr];
// add halfedge to polynet halfedges dictionary
this.halfEdges.Add(vertices[curr], vertices[next_he], currentHalfEdges[curr]);
this.halfEdges.Add(vertices[next_he], vertices[curr], twin);
}
else
{
currentHalfEdges[curr] = exist;
}
}
// create face with some halfedge
Face face = new Face(currentHalfEdges[0]);
// calculate face's normal
face.normal = faceNormal(vertices);
// add face to faces list
faces.Add(face);
// link halfedges with next and prev
for(int i = 0; i < currentHalfEdges.Length; i++){
int next = (i + 1) % currentHalfEdges.Length;
int prev = (currentHalfEdges.Length + i - 1) % currentHalfEdges.Length;
currentHalfEdges[i].next = currentHalfEdges[next];
currentHalfEdges[i].prev = currentHalfEdges[prev];
// link face to halfedge
currentHalfEdges[i].face = face;
}
}
// gets vertex normal as an average of faces normals
public Vector4 normal(Vertex vertex)
{
Vector3 n = new Vector3(0, 0, 0);
Dictionary<Vertex, HalfEdge> d = halfEdges[vertex];
foreach (KeyValuePair<Vertex, HalfEdge> kv in d) {
Face f = kv.Value.face;
n += f.normal;
}
return Vector4.Normalize(new Vector4(n));
}
public Foot(float height, int num_steps, ProgramObject program)
: base(num_steps, program)
{
Vertex[] vertices = new Vertex[]{
new Vertex(new Vector4(1f, -1f, 0, 1f)),
new Vertex(new Vector4(-1f, -1f, 0, 1f)),
new Vertex(new Vector4(-1f, 1f, 0, 1f)),
new Vertex(new Vector4(1f, 1f, 0, 1f)),
};
Vector2[][] textures = new Vector2[vertices.Length][];
for (int i = 0; i < vertices.Length; i++)
{
textures[i] = new Vector2[4];
textures[i][0] = new Vector2((i % 2) / 2, 0);
textures[i][1] = new Vector2((i % 2) / 2 + 1f, 0);
textures[i][2] = new Vector2((i % 2) / 2, 1f);
textures[i][3] = new Vector2((i % 2) / 2 + 1f, 1f);
}
float height_step = height / num_steps;
createSweep(vertices, new Vector4(0, 1f, 0, 1f),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.CreateTranslation(new Vector3(0, 0, (current + 1) * height_step));
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
current++;
float pend = 4 * 0.5f / (float)Math.Pow(steps * 0.1f, 2);
float scale_factor = (float)(pend * Math.Pow(current * 0.1f - steps * 0.1f / 2f, 2) + 0.5f);
return Matrix4.Scale(scale_factor, scale_factor, 1f);
}
)
, textures);
/*
Vertex[][] toDraw = new Vertex[firstFace.Length + 2][];
//indices = new int[firstFace.Length + 2];
//count = new int[firstFace.Length + 2];
// agregar caras extrudadas
for (int i = 0; i < firstFace.Length; i++)
{
int messi = 0;
toDraw[i] = new Vertex[(2 + 2 * steps)*4];
HalfEdge current = polynet.halfEdges[firstFace[i]][firstFace[(i + 1) % firstFace.Length]];
// first
toDraw[i][messi++] = current.origin.position;
for (int j = 0; j < steps; j++)
{
// right (all parameters)
toDraw[i][messi++] = current.next.origin.position;
// left
toDraw[i][messi++] = current.prev.origin.position;
current = polynet.halfEdges[current.prev.origin][current.next.next.origin];
}
// latest
toDraw[i][messi++] = current.next.next.origin.position;
}*/
}
/*
* 2 ---- 3
* | |
* 0 ---- 1
*/
private Vector4[] faceExtents(Vertex vertex, Vertex vertex_2)
{
Matrix4 tr = translation_step(steps, steps);
return new Vector4[]
{
vertex.position,
vertex_2.position,
Vector4.Transform(vertex.position, tr),
Vector4.Transform(vertex_2.position, tr)
};
}
public Cover(float height, int num_steps, ProgramObject program)
: base(num_steps, program)
{
float x = 2.0f;
float y = 2.0f;
float z = 2f;
float aux = 0.15f;
Vertex[] vertices = new Vertex[]{
new Vertex(-x, -y + aux, z, 1.0f),
new Vertex(-x + aux, -y, z, 1.0f),
new Vertex(x - aux, -y, z, 1.0f),
new Vertex(x, -y + aux, z, 1.0f),
new Vertex(x, y - aux, z, 1.0f),
new Vertex(x - aux, y, z, 1.0f),
new Vertex(-x + aux, y, z, 1.0f),
new Vertex(-x, y - aux, z, 1.0f)
};
float step = 2 * (float)Math.PI / vertices.Length;
float theta = (float)Math.PI / 4;
float radius = 2f;
for (int i = 0; i < vertices.Length; i++, theta += step)
{
// Bottom normal pointing down and its texture
vertices[i].texture = new Vector4(new Vector2((184 + 128 * (float)Math.Cos(theta)) / 500, (188 + 128 * (float)Math.Sin(theta)) / 375));
//Console.WriteLine(base_vertices[i].texture.ToString());
}
Vector2[][] textures = new Vector2[vertices.Length][];
for (int i = 0; i < vertices.Length; i++)
{
textures[i] = new Vector2[4];
textures[i][0] = new Vector2((i % 2) / 2, 0);
textures[i][1] = new Vector2((i % 2) / 2 + 0.5f, 0);
textures[i][2] = new Vector2((i % 2) / 2, 1f);
textures[i][3] = new Vector2((i % 2) / 2 + 0.5f, 1f);
}
float height_step = height / num_steps;
createSweep(vertices, new Vector4(0, 1f, 0, 1f),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.CreateTranslation(new Vector3(0, 0, height_step));
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
),
new Func<int, int, Matrix4>(
delegate(int current, int steps)
{
return Matrix4.Identity;
}
)
, textures);
}
// gets all vertex normals
public List<Vector4> normals(Vertex vertex)
{
Dictionary<Vertex, HalfEdge> d = halfEdges[vertex];
List<Vector4> normals = new List<Vector4>();
foreach (KeyValuePair<Vertex, HalfEdge> kv in d)
{
Face f = kv.Value.face;
normals.Add(new Vector4(f.normal));
}
return normals;
}
public SharpObjLoader(string path, Material material)
{
string errors = "";
List<Vector4> positions = new List<Vector4>();
List<Vector4> textures = new List<Vector4>();
List<Vector4> normals = new List<Vector4>();
Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
char[] split = new char[] { ' ' };
string mtlName = null;
if (material != null)
{
Materials.Singleton.AddMaterial(material);
mtlName = material.Name;
}
// Create a stream reader.
using (StreamReader reader = new StreamReader(path))
{
// Read line by line.
string line = null;
while ((line = reader.ReadLine()) != null)
{
//line = line.Replace('.', ',');
// Skip any comments (lines that start with '#').
if (line.StartsWith("#"))
continue;
// Do we have a texture coordinate?
if (line.StartsWith("vt"))
{
// Get the texture coord strings.
string[] values = line.Substring(3).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Parse texture coordinates.
float u = float.Parse(values[0]);
float v = float.Parse(values[1]);
// Add the texture coordinate.
//polygon.UVs.Add(new UV(u, v));
textures.Add(new Vector4(u, 1-v, 0f, 1f));
continue;
}
// Do we have a normal coordinate?
if (line.StartsWith("vn"))
{
// Get the normal coord strings.
string[] values = line.Substring(3).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Parse normal coordinates.
float x = float.Parse(values[0]);
float y = float.Parse(values[1]);
float z = float.Parse(values[2]);
// Add the normal.
//polygon.Normals.Add(new Vertex(x, y, z));
normals.Add(new Vector4(x, y, z, 1f));
continue;
}
// Do we have a vertex?
if (line.StartsWith("v"))
{
// Get the vertex coord strings.
string[] values = line.Substring(2).Split(split, StringSplitOptions.RemoveEmptyEntries);
// Parse vertex coordinates.
float x = float.Parse(values[0]);
float y = float.Parse(values[1]);
float z = float.Parse(values[2]);
// Add the vertices.
//polygon.Vertices.Add(new Vertex(x, y, z));
positions.Add(new Vector4(x, y, z, 1f));
continue;
}
// Do we have a face?
if (line.StartsWith("f"))
{
//Face face = new Face();
//if (!String.IsNullOrWhiteSpace(mtlName))
// face.Material = scene.Assets.Where(t => t.Name == mtlName).FirstOrDefault() as Material;
// Get the face indices
string[] indices = line.Substring(2).Split(split,
StringSplitOptions.RemoveEmptyEntries);
if (indices.Length == 4)
Console.Write("");
// Add each index.
for (int i = 0; i < indices.Length - 1; i+=2)
{
for (int j = 0; j < 3; j++)
{
// Split the parts.
string[] parts = indices[(j + i) % indices.Length].Split(new char[] { '/' }, StringSplitOptions.None);
// Add each part.
int position_index = (parts.Length > 0 && parts[0].Length > 0) ? int.Parse(parts[0]) - 1 : -1;
int texture_index = (parts.Length > 1 && parts[1].Length > 0) ? int.Parse(parts[1]) - 1 : -1;
int normal_index = (parts.Length > 2 && parts[2].Length > 0) ? int.Parse(parts[2]) - 1 : -1;
Vertex v = new Vertex(positions[position_index]);
if (texture_index != -1)
v.texture = textures[texture_index];
if (normal_index != -1)
v.normal = normals[normal_index];
vertices.Add(v);
}
}
// Add the face.
//polygon.Faces.Add(face);
continue;
}
if (line.StartsWith("mtllib"))
{
// Set current directory in case a relative path to material file is used.
//Environment.CurrentDirectory = Path.GetDirectoryName(path);
// Load materials file.
string mtlPath = ReadMaterialValue(line);
LoadMaterials(Path.GetDirectoryName(path) + "\\" + mtlPath);
continue;
}
if (line.StartsWith("usemtl"))
{
mtlName = ReadMaterialValue(line);
ebos[ebos.Count -1 ].material = Materials.Singleton[mtlName];
continue;
}
if (line.StartsWith("g"))
{
// Group name is evth after the space after 'g'
string group_name = line.Substring(line.IndexOf(' ') + 1);
if (ebos.Count != 0)
ebos[ebos.Count - 1].lastIndex = vertices.Count - 1;
EBO ebo = new EBO();
ebo.Name = group_name;
if (mtlName != null)
ebo.material = Materials.Singleton[mtlName];
else
ebo.material = new Material();
ebo.firstIndex = vertices.Count;
ebos.Add(ebo);
continue;
}
errors += "Unsupported keyword " + line + "\n";
}
if (ebos.Count > 0)
ebos[ebos.Count - 1].lastIndex = vertices.Count - 1;
}
// Print Errors in different thread
Thread t = new Thread(new ThreadStart(delegate()
{
Console.WriteLine(errors);
}));
t.Start();
//scene.SceneContainer.AddChild(polygon);
//return scene;
}
private HalfEdge existHalfEdge(Vertex origin, Vertex dest)
{
// check if halfedge exists in
if(halfEdges.ContainsKey(origin) && halfEdges[origin].ContainsKey(dest))
return halfEdges[origin][dest];
return null;
}
public ObjLoader(string path)
{
FileStream fs = File.Open(path, FileMode.Open);
StreamReader reader = new StreamReader(fs);
string line = reader.ReadLine();
line = line.Trim(' ').Replace('.', ',').Replace(" ", " ");
string[] values = line.Split(' ');
List<Vector4> positions = new List<Vector4>();
List<Vector4> textures = new List<Vector4>();
List<Vector4> normals = new List<Vector4>();
// Read vertices
while (values[0] == "v")
{
positions.Add( new Vector4(float.Parse(values[1]), float.Parse(values[2]), float.Parse(values[3]), 1f));
line = reader.ReadLine().Trim(' ').Replace('.', ',').Replace(" ", " ");
values = line.Split(' ');
}
// Read texture
while (values[0] == "vt")
{
textures.Add( new Vector4(float.Parse(values[1]), float.Parse(values[2]), 0f, 1f));
line = reader.ReadLine().Trim(' ').Replace('.', ',').Replace(" ", " ");
values = line.Split(' ');
}
// Read normals
while (values[0] == "vn")
{
normals.Add( new Vector4(float.Parse(values[1]), float.Parse(values[2]), float.Parse(values[3]), 1f));
line = reader.ReadLine().Trim(' ').Replace('.', ',').Replace(" ", " ");
values = line.Split(' ');
}
// Read faces
while (values[0] == "f")
{
for (int i = 0; i < 3; i++)
{
string[] v_3 = values[i + 1].Split('/');
Vertex v = new Vertex(positions[int.Parse(v_3[0]) - 1]);
v.texture = textures[int.Parse(v_3[1]) - 1];
v.normal = normals[int.Parse(v_3[2]) - 1];
vertices.Add(v);
}
line = reader.ReadLine();
if (line == null)
return;
line = line.Trim(' ').Replace('.', ',').Replace(" ", " ");
values = line.Split(' ');
}
}
private Vector3 faceNormal(Vertex[] vertices)
{
Vector3 edge1, edge2;
edge1 = new Vector3(vertices[1].position - vertices[0].position);
edge2 = new Vector3(vertices[2].position - vertices[1].position);
// get face's normal vector with cross product
Vector3 ret = Vector3.Cross(edge1, edge2);
return ret;
}
