public void Start()
{
Setup();
var sw = Stopwatch.StartNew();
model = ModelFactory.CreateTestObject();
//model = ModelFactory.CreateFromFile("bunny.ply", 1000);
model.FillColor = Color.Gray.ToArgb();
model.LineColor = Color.Red.ToArgb();
model.CalculateColors();
//model = ModelFactory.CreateFromFile(@"C:\Users\Ruud\Desktop\Armadillo2.ply", 5);
//model = ModelFactory.CreateFromFile(@"g:\Data\Projects\3D\3dconverter\models\horseasc.ply", 1000);
//model = ModelFactory.CreateFromFile(@"g:\Data\Projects\3D\3dconverter\models\ateneav.ply", 0.1);
//model = ModelFactory.CreateFromFile(@"g:\Data\Projects\3D\3dconverter\models\pots.ply", 1);
//model = ModelFactory.CreateFromFile(@"g:\Data\Projects\3D\3dconverter\models\balls.ply", 1);
Logger.Value("model load", sw.ElapsedMilliseconds);
timerUpdate.Enabled = true;
}
public static Model CreateTestObject()
{
var model = new Model();
model.Rotation = new Vector3(0, 0, 0);
model.AddVertex(-100, 100, -100, 1); // 0
model.AddVertex(100, 100, -100, 0.9); // 1
model.AddVertex(-100, -100, -100, 0.8); // 2
model.AddVertex(-100, 100, 100, 0.7); // 3
model.AddVertex(100, 100, 100, 0.6); // 4
model.AddVertex(-100, -100, 100, 0.5); // 5
model.AddVertex(100, -100, -100, 0.4); // 6
model.AddVertex(100, -100, 100, 0.3); // 7
model.AddVertex(0, 150, 0, 0.2); // 8
model.AddVertex(0, -50, 0, 0.1); // 9
model.AddTriangle(0, 1, 2);
model.AddTriangle(1, 6, 2);
model.AddTriangle(1, 4, 6);
model.AddTriangle(4, 7, 6);
model.AddTriangle(4, 3, 7);
model.AddTriangle(3, 5, 7);
model.AddTriangle(3, 0, 5);
model.AddTriangle(0, 2, 5);
model.AddTriangle(0, 8, 1);
model.AddTriangle(1, 8, 4);
model.AddTriangle(4, 8, 3);
model.AddTriangle(3, 8, 0);
model.AddTriangle(6, 9, 2);
model.AddTriangle(2, 9, 5);
model.AddTriangle(5, 9, 7);
model.AddTriangle(7, 9, 6);
model.CenterModel();
return model;
}
public static Model CreateCube()
{
var model = new Model();
model.Rotation = new Vector3(0, 0, 0); //new Vector3(81, 358, 351);
model.AddVertex(-100, 100, -100); // 0
model.AddVertex(100, 100, -100); // 1
model.AddVertex(-100, -100, -100); // 2
model.AddVertex(-100, 100, 100); // 3
model.AddVertex(100, 100, 100); // 4
model.AddVertex(-100, -100, 100); // 5
model.AddVertex(100, -100, -100); // 6
model.AddVertex(100, -100, 100); // 7
//int? fillColor1 = Color.FromArgb(140, 140, 140).ToArgb();
//int? fillColor2 = Color.FromArgb(120, 120, 120).ToArgb();
//int? fillColor3 = Color.FromArgb(100, 100, 100).ToArgb();
//int borderColor = Color.Red.ToArgb();
//model.Triangles.Add(new Triangle(
// model.Vertices[0],
// model.Vertices[1],
// model.Vertices[2],
// borderColor, fillColor1));
//model.Triangles.Add(new Triangle(
// model.Vertices[1],
// model.Vertices[6],
// model.Vertices[2],
// borderColor, fillColor1));
//model.Triangles.Add(new Triangle(
// model.Vertices[1],
// model.Vertices[4],
// model.Vertices[6],
// borderColor, fillColor2));
//model.Triangles.Add(new Triangle(
// model.Vertices[4],
// model.Vertices[7],
// model.Vertices[6],
// borderColor, fillColor2));
//model.Triangles.Add(new Triangle(
// model.Vertices[4],
// model.Vertices[3],
// model.Vertices[7],
// borderColor, fillColor1));
//model.Triangles.Add(new Triangle(
// model.Vertices[3],
// model.Vertices[5],
// model.Vertices[7],
// borderColor, fillColor1));
//model.Triangles.Add(new Triangle(
// model.Vertices[3],
// model.Vertices[0],
// model.Vertices[5],
// borderColor, fillColor2));
//model.Triangles.Add(new Triangle(
// model.Vertices[0],
// model.Vertices[2],
// model.Vertices[5],
// borderColor, fillColor2));
//model.Triangles.Add(new Triangle(
// model.Vertices[3],
// model.Vertices[4],
// model.Vertices[0],
// borderColor, fillColor3));
//model.Triangles.Add(new Triangle(
// model.Vertices[4],
// model.Vertices[1],
// model.Vertices[0],
// borderColor, fillColor3));
//model.Triangles.Add(new Triangle(
// model.Vertices[2],
// model.Vertices[6],
// model.Vertices[5],
// borderColor, fillColor3));
//model.Triangles.Add(new Triangle(
// model.Vertices[6],
// model.Vertices[7],
// model.Vertices[5],
// borderColor, fillColor3));
//model.CenterModel();
return model;
}
/// <summary>
/// Create model from PLY ascii file
/// </summary>
/// <param name="filepath"></param>
/// <param name="scalar"></param>
/// <returns></returns>
public static Model CreateFromFile(string filename, double scalar = 1)
{
var model = new Model();
string filepath = Path.Combine(Application.StartupPath, "Resources", filename);
var lines = File.ReadLines(filepath);
int readmode = 0; // 0=header, 1=vertices, 2=triangles, 3=done
int vertexcount = 0;
int trianglecount = 0;
int readvertices = 0;
int readtriangles = 0;
int bcolor = Color.Red.ToArgb();
int? fcolor = Color.Gray.ToArgb();
foreach (string line in lines)
{
if (readmode == 0)
{
if (line.StartsWith("element vertex"))
{
string rev = ReverseString(line.Trim());
string value = ReverseString(rev.Substring(0, rev.IndexOf(" ")));
vertexcount = Convert.ToInt32(value);
}
if (line.StartsWith("element face"))
{
string rev = ReverseString(line.Trim());
string value = ReverseString(rev.Substring(0, rev.IndexOf(" ")));
trianglecount = Convert.ToInt32(value);
}
if (line.StartsWith("end_header"))
{
readmode = 1;
continue;
}
}
if (readmode == 1)
{
double[] values = line.Trim().Split(' ').Select(x => Math.Round(Convert.ToDouble(x) * scalar)).ToArray();
model.AddVertex(values[0], values[1], values[2], (values.Length >= 5) ? (values[4] / scalar) * 2 : 1);
if (++readvertices >= vertexcount)
{
readmode = 2;
continue;
}
}
if (readmode == 2)
{
int[] values = line.Trim().Split(' ').Select(x => Convert.ToInt32(x)).ToArray();
model.AddTriangle(values[1], values[2], values[3]);
if (++readtriangles >= trianglecount)
{
readmode = 3;
continue;
}
}
}
model.CenterModel();
return model;
}
/// <summary>
/// Draw a (filled) triangle to the framebuffer
/// </summary>
/// <remarks>http://www-users.mat.uni.torun.pl/~wrona/3d_tutor/tri_fillers.html</remarks>
/// <param name="vertices"></param>
/// <param name="color"></param>
/// <param name="fill"></param>
public void DrawTriangle(Model model, Triangle triangle)
{
Vertex[] sortedv = new Vertex[3];
triangle.Vertices.CopyTo(sortedv, 0);
Array.Sort(sortedv, delegate(Vertex v1, Vertex v2)
{
return v1.Projected.Y.CompareTo(v2.Projected.Y);
});
Vector3 a = sortedv[0].Projected;
Vector3 b = sortedv[1].Projected;
Vector3 c = sortedv[2].Projected;
double dx1 = (b.Y - a.Y > 0) ? (double)(b.X - a.X) / (double)(b.Y - a.Y) : 0;
double dx2 = (c.Y - a.Y > 0) ? (double)(c.X - a.X) / (double)(c.Y - a.Y) : 0;
double dx3 = (c.Y - b.Y > 0) ? (double)(c.X - b.X) / (double)(c.Y - b.Y) : 0;
double ex = (double)a.X;
double sx = (double)a.X;
double sy = (double)a.Y;
for (; sy <= b.Y; sy++, sx += dx1, ex += dx2)
{
DrawTriangleScanline(sx, ex, sy, model.LineColor, triangle.ShadedFillColor);
}
sx = b.X;
for (; sy <= c.Y; sy++, sx += dx3, ex += dx2)
{
DrawTriangleScanline(sx, ex, sy, model.LineColor, triangle.ShadedFillColor);
}
}
/// <summary>
/// Draw a mesh model after it has been processed (transformed and projected)
/// </summary>
/// <param name="model"></param>
public void DrawModel(Model model)
{
//foreach (Vertex v in model.Vertices)
//{
// DrawPixel(v.Projected, Color.Red.ToArgb());
//}
int c = 0;
foreach (Triangle t in model.Triangles.Where(x => !x.IsBackFaced))
{
DrawTriangle(model, t);
c++;
}
Logger.Value("triangles drawn", c);
}
