public ObjModelRenderer(ObjModel model, Drawer drawer)
{
this.drawer = drawer;
light = new Vector3(0, 0, -1).Normalize();
var eye = new Vector3(0f, 0f, 8f);
var center = Vector3.Zero;
var aspect = (float)drawer.Width / drawer.Height;
projection = ProjectionMatrix(FovYFromFovX(90f, aspect), aspect, ZNear, ZFar);
viewport = ViewportMatrix(drawer.Width, drawer.Height, ViewDepth, drawer.Width, drawer.Height);
view = LookAtMatrix(eye, center, Vector3.Up);
rot = Matrix.Identity(4, 4);
SetModel(model);
}
public void SetModel(ObjModel model)
{
this.model = model;
vertices = model.Vertices;
faces = model.Faces;
}
public static ObjModel FromFile(string filename)
{
var timer = Stopwatch.StartNew();
var mdl = new ObjModel();
var lines = File.ReadLines(filename);
var vertices = new List <Vector3>();
var maxX = 0f;
var minX = 0f;
var maxY = 0f;
var minY = 0f;
var maxZ = 0f;
var minZ = 0f;
foreach (var line in lines)
{
if (line.StartsWith("#"))
{
continue;
}
var args = line.Split(' ');
switch (args[0])
{
default:
continue;
case "v":
var x = float.Parse(args[1], CultureInfo.InvariantCulture);
var y = float.Parse(args[2], CultureInfo.InvariantCulture);
var z = float.Parse(args[3], CultureInfo.InvariantCulture);
maxX = Math.Max(x, maxX);
minX = Math.Min(x, minX);
maxY = Math.Max(y, maxY);
minY = Math.Min(y, minY);
maxZ = Math.Max(z, maxZ);
minZ = Math.Min(z, minZ);
vertices.Add(new Vector3(x, y, z));
break;
case "f":
var i1Args = args[1].Split('/');
var i1 = int.Parse(i1Args[0], CultureInfo.InvariantCulture);
var i2Args = args[2].Split('/');
var i2 = int.Parse(i2Args[0], CultureInfo.InvariantCulture);
var i3Args = args[3].Split('/');
var i3 = int.Parse(i3Args[0], CultureInfo.InvariantCulture);
mdl.faces.Add(Tuple.Create(i1 - 1, i2 - 1, i3 - 1));
break;
}
}
mdl.dimOrigin = new Vector3(minX, minY, minZ);
mdl.dimSize = new Vector3(maxX - minX, maxY - minY, maxZ - minZ);
mdl.dimCenter = new Vector3(mdl.dimOrigin.X + (mdl.dimSize.X / 2f), mdl.dimOrigin.Y + (mdl.dimSize.Y / 2f), mdl.dimOrigin.Z + (mdl.dimSize.Z / 2f));
foreach (var vert in vertices)
{
mdl.vertices.Add(new Vector3(
vert.X,
vert.Y,
vert.Z));
}
timer.Stop();
Console.WriteLine($"{Path.GetFileName(filename)} loaded in {timer.Elapsed.TotalMilliseconds} ms with {mdl.vertices.Count} vertices and {mdl.faces.Count} faces, dimensions {mdl.dimOrigin} : {mdl.dimSize} : {mdl.dimCenter}");
return(mdl);
}
