public void BoundingOrdinatesToWorldCoordinates_ForVariousArguments_ReturnPolygonInWorldCoordinates(int width, int height)
{
// Setup
var worldFile = new WorldFile(1.1, 2.2, 3.3, 4.4, 5.5, 6.6);
// Call
IPolygon polygon = worldFile.BoundingOrdinatesToWorldCoordinates(width, height);
// Assert
Coordinate p1 = worldFile.ToWorldCoordinates(0, 0);
Coordinate p2 = worldFile.ToWorldCoordinates(0, height);
Coordinate p3 = worldFile.ToWorldCoordinates(width, 0);
Coordinate p4 = worldFile.ToWorldCoordinates(width, height);
CollectionAssert.IsEmpty(polygon.Holes);
CollectionAssert.AreEqual(new[]
{
p1,
p2,
p3,
p4,
p1
}, polygon.Shell.Coordinates);
}
public void ToWorldCoordinates_InitializedForSimpleTransformation_ReturnExpectedLocation(double scaleFactorX, double scaleFactorY, double translationX, double translationY)
{
// Setup
var worldFile = new WorldFile(scaleFactorX, 0.0, 0.0, scaleFactorY, translationX, translationY);
const int x = 1;
const int y = 2;
// Call
Coordinate worldPoint = worldFile.ToWorldCoordinates(x, y);
// Assert
double expectedX = scaleFactorX * x + translationX;
double expectedY = scaleFactorY * y + translationY;
Assert.AreEqual(expectedX, worldPoint.X);
Assert.AreEqual(expectedY, worldPoint.Y);
}
public void GivenScreenSpaceCoordinate_WhenDoingRoundtripTransformation_ThenScreenSpaceCoordinateRemainsUnchanged()
{
// Given
const double a11 = 1.1;
const double a21 = 2.2;
const double a12 = 3.3;
const double a22 = 4.4;
const double transformationX = 5.5;
const double transformationY = 6.6;
var worldFile = new WorldFile(a11, a21, a12, a22, transformationX, transformationY);
const int x = 20;
const int y = 17;
// When
Coordinate worldCoordinate = worldFile.ToWorldCoordinates(x, y);
Point screenCoordinate = worldFile.ToScreenCoordinates(worldCoordinate);
// Assert
Assert.AreEqual(x, screenCoordinate.X);
Assert.AreEqual(y, screenCoordinate.Y);
}
public void ToWorldCoordinates_InitializedForSimpleRotation_ReturnExpectedLocation(double radian)
{
// Setup
const int x = 1;
const int y = 2;
// 2D Rotation matrix:
double a11 = Math.Cos(radian);
double a21 = Math.Sin(radian);
double a12 = -Math.Sin(radian);
double a22 = Math.Cos(radian);
var worldFile = new WorldFile(a11, a21, a12, a22, 0.0, 0.0);
// Call
Coordinate worldPoint = worldFile.ToWorldCoordinates(x, y);
// Assert
double expectedX = a11 * x + a21 * y;
double expectedY = a12 * x + a22 * y;
Assert.AreEqual(expectedX, worldPoint.X);
Assert.AreEqual(expectedY, worldPoint.Y);
}
