public void TestComplexAreaAlgorithmWithComplexPolygonNoBufferOverrun()
{
// the complex area algorithm is very low resolution compared to simple area, so the error magnitude is higher
const int side = 1000;
const int expected = side * side / 2;
PointF[] data = new PointF[5];
data[0] = new PointF(0, 0);
data[1] = new PointF(side, 0);
data[2] = new PointF(0, side);
data[3] = new PointF(side, side);
data[4] = new PointF(side / 2f, side / 2f);
PolygonF.TestVertexNormalization(data);
RectangleF bounding = RectangleUtilities.ComputeBoundingRectangle(data);
// test for a possible buffer overrun in the computation
foreach (PointF garbagePoint in SimulatedBufferOverrunPoints)
{
data[data.Length - 1] = garbagePoint;
unsafe
{
fixed(PointF *points = data)
{
// inside PolygonF, the vertexCount is always exactly the expected array length
// which is 4 (the 5th point simulates garbage data beyond the array)
double result = PolygonF.TestComplexAreaComputation(bounding, points, data.Length - 1);
Trace.WriteLine(string.Format("Complex Area: Expected {0:f5} Got {1:f5}", expected, result), "UNIT_TESTS");
Assert.IsTrue(Math.Abs(expected - result) < expected / 100f);
}
}
}
}
public void TestComplexAreaAlgorithmWithComplexPolygon()
{
// the complex area algorithm is very low resolution compared to simple area, so the error magnitude is higher
const int side = 1000;
const int expected = side * side / 2;
PointF[] data = new PointF[4];
data[0] = new PointF(0, 0);
data[1] = new PointF(side, 0);
data[2] = new PointF(0, side);
data[3] = new PointF(side, side);
PolygonF.TestVertexNormalization(data);
RectangleF bounding = RectangleUtilities.ComputeBoundingRectangle(data);
unsafe
{
fixed(PointF *points = data)
{
// inside PolygonF, the vertexCount is always exactly the expected array length
double result = PolygonF.TestComplexAreaComputation(bounding, points, data.Length);
Trace.WriteLine(string.Format("Complex Area: Expected {0:f5} Got {1:f5}", expected, result), "UNIT_TESTS");
Assert.IsTrue(Math.Abs(expected - result) < expected / 100f);
}
}
}