public void Triangulating_polygons()
{
var content =
@"v -1 1 0
v -1 0 0
v 1 0 0
v 1 1 0
v 0 2 0
f 1 2 3 4 5";
var result = ObjFileParser.Parse(content);
result.DefaultGroup.Shapes.Count.Should().Be(3);
var triangle1 = (Triangle)result.DefaultGroup.Shapes[0];
triangle1.P1.Should().Be(result.Vertices[1]);
triangle1.P2.Should().Be(result.Vertices[2]);
triangle1.P3.Should().Be(result.Vertices[3]);
var triangle2 = (Triangle)result.DefaultGroup.Shapes[1];
triangle2.P1.Should().Be(result.Vertices[1]);
triangle2.P2.Should().Be(result.Vertices[3]);
triangle2.P3.Should().Be(result.Vertices[4]);
var triangle3 = (Triangle)result.DefaultGroup.Shapes[2];
triangle3.P1.Should().Be(result.Vertices[1]);
triangle3.P2.Should().Be(result.Vertices[4]);
triangle3.P3.Should().Be(result.Vertices[5]);
}
public void FacesWithNormals()
{
var content =
@"v 0 1 0
v -1 0 0
v 1 0 0
vn -1 0 0
vn 1 0 0
vn 0 1 0
f 1//3 2//1 3//2
f 1/0/3 2/102/1 3/14/2";
var parser = ObjFileParser.Parse(content);
var g = parser.DefaultGroup;
var t1 = (SmoothTriangle)g.Shapes[0];
var t2 = (SmoothTriangle)g.Shapes[1];
t1.P1.Should().Be(parser.Vertices[1]);
t1.P2.Should().Be(parser.Vertices[2]);
t1.P3.Should().Be(parser.Vertices[3]);
t1.N1.Should().Be(parser.Normals[3]);
t1.N2.Should().Be(parser.Normals[1]);
t1.N3.Should().Be(parser.Normals[2]);
t2.P1.Should().Be(parser.Vertices[1]);
t2.P2.Should().Be(parser.Vertices[2]);
t2.P3.Should().Be(parser.Vertices[3]);
t2.N1.Should().Be(parser.Normals[3]);
t2.N2.Should().Be(parser.Normals[1]);
t2.N3.Should().Be(parser.Normals[2]);
}
public void Ignoring_unrecognized_lines()
{
var gibberish =
@"There was a young lady named Bright
who traveled much faster than light.
She set out one day
in a relative way,
and came back the previous night.";
var result = ObjFileParser.Parse(gibberish);
result.NumberIgnoredLines.Should().Be(5);
}
public void Vertex_normal_records()
{
var content =
@"vn 0 0 1
vn 0.707 0 -0.707
vn 1 2 3";
var parser = ObjFileParser.Parse(content);
parser.Normals[1].Should().Be(Tuple.Vector(0, 0, 1));
parser.Normals[2].Should().Be(Tuple.Vector(0.707, 0, -0.707));
parser.Normals[3].Should().Be(Tuple.Vector(1, 2, 3));
}
public void Vertex_records()
{
var content =
@"v -1 1 0
v -1.0000 0.5000 0.0000
v 1 0 0
v 1 1 0";
var result = ObjFileParser.Parse(content);
result.Vertices.Count.Should().Be(5); // One dummy a index 0
result.Vertices[1].Should().Be(Tuple.Point(-1, 1, 0));
result.Vertices[2].Should().Be(Tuple.Point(-1, 0.5, 0));
result.Vertices[3].Should().Be(Tuple.Point(1, 0, 0));
result.Vertices[4].Should().Be(Tuple.Point(1, 1, 0));
}
public void Parsing_triangle_faces()
{
var content =
@"v -1 1 0
v -1 0 0
v 1 0 0
v 1 1 0
f 1 2 3
f 1 3 4";
var result = ObjFileParser.Parse(content);
var triangle1 = (Triangle)result.DefaultGroup.Shapes[0];
triangle1.P1.Should().Be(result.Vertices[1]);
triangle1.P2.Should().Be(result.Vertices[2]);
triangle1.P3.Should().Be(result.Vertices[3]);
var triangle2 = (Triangle)result.DefaultGroup.Shapes[1];
triangle2.P1.Should().Be(result.Vertices[1]);
triangle2.P2.Should().Be(result.Vertices[3]);
triangle2.P3.Should().Be(result.Vertices[4]);
}
