IEnumerable <Polygon> ExtractPolygon(XElement xelement)
{
List <Polygon> ret = new List <Polygon>();
string pointsString = xelement.Attribute("points")?.Value;
string styleString = xelement.Attribute("style")?.Value;
string transformationString = xelement.Attribute("transform")?.Value;
string color = ColorFromStyle(styleString);
string stroke = StrokeFromStyle(styleString);
var transformation = new TransformationParser(transformationString).GetTransformation();
if (!string.IsNullOrEmpty(pointsString))
{
var points = pointsString
.Split(' ')
.Select(position => position.Split(','))
.SelectMany(positionParts => AddPoint(positionParts, transformation))
.ToList();
ret.Add(new Polygon(points, color, stroke));
}
return(ret);
}
public void MatrixAndTranslate()
{
TransformationParser tp = new TransformationParser("matrix(2,0,0,2,0,0) translate(3,-4.0)");
double[] tr = tp.GetTransformation();
var p = new Point(1, 2, tr);
Assert.AreEqual(5, p.X);
Assert.AreEqual(0, p.Y);
}
public void Rotate()
{
TransformationParser tp = new TransformationParser("rotate(90)");
double[] tr = tp.GetTransformation();
var p = new Point(1, 0, tr);
Assert.AreEqual(0, Math.Round(p.X, 8));
Assert.AreEqual(1, Math.Round(p.Y, 8));
}
public void Translate()
{
TransformationParser tp = new TransformationParser("translate(15, -34.8)");
double[] tr = tp.GetTransformation();
var p = new Point(1, 2, tr);
Assert.AreEqual(16, p.X);
Assert.AreEqual(-32.8, p.Y);
}
public void Matrix()
{
TransformationParser tp = new TransformationParser("matrix(1,0,0,2,-3, 3)");
double[] tr = tp.GetTransformation();
var p = new Point(1, 2, tr);
Assert.AreEqual(-2, p.X);
Assert.AreEqual(7, p.Y);
}
public void SkewY()
{
TransformationParser tp = new TransformationParser("skewY(-30)");
double[] tr = tp.GetTransformation();
var p = new Point(1, 1, tr);
Assert.AreEqual(1, Math.Round(p.X, 8));
Assert.AreEqual(Math.Round(1 - 1 / Math.Sqrt(3.0), 8), Math.Round(p.Y, 8));
}
public void Scale2()
{
TransformationParser tp = new TransformationParser("scale(0.2)");
double[] tr = tp.GetTransformation();
var p = new Point(-5, 10, tr);
Assert.AreEqual(-1, Math.Round(p.X, 8));
Assert.AreEqual(2, Math.Round(p.Y, 8));
}
public void Scale1()
{
TransformationParser tp = new TransformationParser("scale(3)");
double[] tr = tp.GetTransformation();
var p = new Point(1, -2, tr);
Assert.AreEqual(3, Math.Round(p.X, 8));
Assert.AreEqual(-6, Math.Round(p.Y, 8));
}
public void NullIsParsedAsNoTransformation()
{
TransformationParser tp = new TransformationParser(null);
double[] tr = tp.GetTransformation();
Assert.AreEqual(1, tr[0]);
Assert.AreEqual(1, tr[3]);
Assert.AreEqual(0, tr[1]);
Assert.AreEqual(0, tr[2]);
Assert.AreEqual(0, tr[4]);
Assert.AreEqual(0, tr[5]);
}
public void EmptyStringIsParsedAsNoTransformation()
{
TransformationParser tp = new TransformationParser(string.Empty);
double[] tr = tp.GetTransformation();
Assert.AreEqual(1, tr[0]);
Assert.AreEqual(1, tr[3]);
Assert.AreEqual(0, tr[1]);
Assert.AreEqual(0, tr[2]);
Assert.AreEqual(0, tr[4]);
Assert.AreEqual(0, tr[5]);
}
