/// <summary>
/// Constructs an instance of the <see cref="Triangle"/> class. The points
/// must be defined in counter-clockwise order
/// </summary>
/// <param name="p0">First vertex</param>
/// <param name="p1">Second vertex</param>
/// <param name="p2">Third vertex</param>
/// <param name="mat">The material for the triangle</param>
public Triangle(Vertex p0, Vertex p1, Vertex p2, Material mat)
{
_p0 = p0;
_p1 = p1;
_p2 = p2;
_normal = Vector3.Cross((_p2.Position - _p1.Position), (_p0.Position - _p1.Position));
_area = _normal.Magnitude;
_normal = _normal.Normalized;
Material = mat;
}
/// <summary>
/// Does the conversion
/// </summary>
/// <param name="data">The obj data to convert</param>
/// <returns>The constructed Scene</returns>
public static Scene Convert(ObjData data)
{
Scene s = new Scene();
Dictionary<string, Material> materials = new Dictionary<string, Material>();
Dictionary<string, Bitmap> bitmaps = new Dictionary<string, Bitmap>();
foreach (var mat in data.materials)
{
LoadBitmap(mat.AlphaTextureMap, bitmaps);
LoadBitmap(mat.AmbientTextureMap, bitmaps);
LoadBitmap(mat.BumpMap, bitmaps);
LoadBitmap(mat.DiffuseTextureMap, bitmaps);
LoadBitmap(mat.DisplacementMap, bitmaps);
LoadBitmap(mat.SpecularCoefficientMap, bitmaps);
LoadBitmap(mat.SpecularTextureMap, bitmaps);
Material m = new Material();
m.AlphaMap = bitmaps[mat.AlphaTextureMap];
m.AmbientMap = bitmaps[mat.AmbientTextureMap];
m.BumpMap = bitmaps[mat.AmbientTextureMap];
m.DiffuseMap = bitmaps[mat.AmbientTextureMap];
m.DisplacementMap = bitmaps[mat.AmbientTextureMap];
m.SpecularCoefficientMap = bitmaps[mat.AmbientTextureMap];
m.SpecularMap = bitmaps[mat.AmbientTextureMap];
m.Texture = bitmaps[mat.DiffuseTextureMap];
m.AmbientColor = mat.Ambient;
m.DiffuseColor = mat.Diffuse;
m.SpecularCoefficient = mat.SpecularCoefficient;
m.SpecularColor = mat.Specular;
m.Transparency = mat.Transparency;
m.Name = mat.Name;
materials[m.Name] = m;
}
foreach (var f in data.faces)
{
Vertex v1 = new Vertex();
Vertex v2 = new Vertex();
Vertex v3 = new Vertex();
v1.Position = data.vertices[f.Vert1.vertex - 1];
v2.Position = data.vertices[f.Vert2.vertex - 1];
v3.Position = data.vertices[f.Vert3.vertex - 1];
v1.Normal = data.normals[f.Vert1.normal - 1];
v2.Normal = data.normals[f.Vert2.normal - 1];
v3.Normal = data.normals[f.Vert3.normal - 1];
// Only set the texture coordinates if they were set
if (f.Vert1.texCoord > 0 && f.Vert2.texCoord > 0 && f.Vert3.texCoord > 0)
{
v1.TexCoord = data.texCoords[f.Vert1.texCoord - 1];
v2.TexCoord = data.texCoords[f.Vert2.texCoord - 1];
v3.TexCoord = data.texCoords[f.Vert3.texCoord - 1];
}
Triangle t = new Triangle(v1, v2, v3);
if (!string.IsNullOrEmpty(f.Material))
{
t.Material = materials[f.Material];
}
s.Triangles.Add(t);
}
return s;
}
