Polytope GenerateDodeca()
{
Polytope icosa = GenerateIcosa();
Polytope dodeca = new Polytope();
foreach (var edge in icosa.polygons)
{
dodeca.Add(new Point
{
X = edge.Points(icosa).Sum(p => p.X) / 3, Y = edge.Points(icosa).Sum(p => p.Y) / 3,
Z = edge.Points(icosa).Sum(p => p.Z) / 3
});
}
dodeca.Add(new Polygon(new int[] { 16, 12, 8, 4, 0 }));
for (int i = 0, j = 3; i < dodeca.points.Count; i += 4, j += 4)
{
dodeca.Add(new Polygon(new int[] { (i + 4) % 20, (i + 5) % 20, i + 3, i + 1, i }));
dodeca.Add(new Polygon(new int[] { j, j - 1, (20 + j - 4) % 20 - 1, (20 + j - 4) % 20, i + 1 }));
}
dodeca.Add(new Polygon(new int[] { 2, 6, 10, 14, 18 }));
return(dodeca);
}
Polytope MakeGraph(Node node, double xStart, double xEnd, double xStep, double yStart, double yEnd, double yStep)
{
var result = new Polytope();
int xDelta = 0;
int yDelta = 0;
for (double i = xStart; i <= xEnd; i += xStep)
{
xDelta += 1;
yDelta = 0;
for (double j = yStart; j <= yEnd; j += yStep)
{
yDelta += 1;
result.Add(new Base3D.Point {
X = i, Y = j, Z = node.Get(i, j)
});
result.AddNormal(new Base3D.Point {
X = -node.Dx().Get(i, j), Y = -node.Dy().Get(i, j), Z = 1
}.Normal());
result.AddNormal(new Base3D.Point {
X = node.Dx().Get(i, j), Y = node.Dy().Get(i, j), Z = -1
}.Normal());
}
}
for (int i = 0; i < xDelta - 1; ++i)
{
for (int j = 0; j < yDelta - 1; ++j)
{
result.Add(new Polygon(new int[] {
j + i * yDelta,
j + (i + 1) * yDelta,
(j + 1) + (i + 1) * yDelta,
(j + 1) + i * yDelta
},
new int[] {
2 * (j + i * yDelta),
2 * (j + (i + 1) * yDelta),
2 * ((j + 1) + (i + 1) * yDelta),
2 * ((j + 1) + i * yDelta)
}
));
result.Add(new Polygon(new int[] {
j + i * yDelta,
(j + 1) + i * yDelta,
(j + 1) + (i + 1) * yDelta,
j + (i + 1) * yDelta
},
new int[] {
2 * (j + i * yDelta) + 1,
2 * ((j + 1) + i * yDelta) + 1,
2 * ((j + 1) + (i + 1) * yDelta) + 1,
2 * (j + (i + 1) * yDelta) + 1
}
));
}
}
return(result);
}
public static Entity Parse(string file)
{
Directory.SetCurrentDirectory(Path.GetDirectoryName(file));
Polytope current = new Polytope();
Dictionary <string, BaseMaterial> mtl = new Dictionary <string, BaseMaterial>();
foreach (var s in File.ReadAllLines(file))
{
if (String.IsNullOrEmpty(s))
{
continue;
}
var lines = Regex.Split(s, @"\s").Where(l => !String.IsNullOrEmpty(l)).ToList();
string flag = lines[0];
if (flag == "v")
{
current.Add(new Base3D.Point
{
X = double.Parse(lines[1]),
Y = -double.Parse(lines[3]),
Z = double.Parse(lines[2])
});
}
else
if (flag == "vn")
{
current.AddNormal(new Base3D.Point
{
X = double.Parse(lines[1]),
Y = -double.Parse(lines[3]),
Z = double.Parse(lines[2])
});
}
else
if (flag == "vt")
{
current.Addtexture((
double.Parse(lines[1]),
double.Parse(lines[2])
));
}
else
if (flag == "f")
{
var first = lines[1].Split('/');
var vertexes = lines.Skip(1).Select(l => Int32.Parse(l.Split('/')[0]) - 1).ToArray();
var textures = (first.Length > 1 && !String.IsNullOrEmpty(first[1])) ?
lines.Skip(1).Select(l => Int32.Parse(l.Split('/')[1]) - 1).ToArray() : null;
var normals = (first.Length > 2 && !String.IsNullOrEmpty(first[2])) ?
lines.Skip(1).Select(l => Int32.Parse(l.Split('/')[2]) - 1).ToArray() : null;
current.Add(new Polygon(vertexes, textures, normals));
}
else
if (flag == "mtllib")
{
try
{
var new_mtl = LoadMtl(Regex.Replace(s, @"\s*mtllib\s*(.*\S)\s*$", "$1"));
mtl = new_mtl;
}
catch (Exception e)
{
MessageBox.Show($"Не вышло загрузить текстуры: {e.Message}", "Окошко-всплывашка", MessageBoxButtons.OK,
MessageBoxIcon.Information);
}
}
else
if (flag == "usemtl")
{
string matName = Regex.Replace(s, @"\s*usemtl\s*(.*\S)\s*$", "$1");
if (mtl.ContainsKey(matName))
{
current.Matreial = mtl[matName];
}
}
}
return(current);
}
