public void CanScaleEyes()
{
var transformation = Transformation.Construct(leftEye: new Eye {
X = 0, Y = 0
}, rightEye: new Eye {
X = 0, Y = 4
}, width: 8);
Expect.FloatEquals(2, transformation.Scale);
}
public void CanAlignEyesToNegativeAngle()
{
var transformation = Transformation.Construct(leftEye: new Eye {
X = 0, Y = 0
}, rightEye: new Eye {
X = 3, Y = -3
});
Expect.FloatEquals(-Math.PI / 4.0, transformation.Angle);
}
public void CanAlignEyes()
{
var transformation = Transformation.Construct(leftEye: new Eye {
X = 0, Y = 0
}, rightEye: new Eye {
X = 5, Y = 5
});
Expect.FloatEquals(Math.PI / 4.0, transformation.Angle);
}
public void CanDoBothRotateAndScale()
{
var leftEye = new Eye {
X = 2, Y = 2
};
var rightEye = new Eye {
X = (float)(2 + 4 * Math.Cos(Math.PI / 6)), Y = (float)(2 + 4 * Math.Sin(Math.PI / 6))
};
var transformation = Transformation.Construct(leftEye: leftEye, rightEye: rightEye, width: 10);
Expect.FloatEquals(Math.PI / 6, transformation.Angle);
Expect.FloatEquals(2.5, transformation.Scale);
Assert.AreEqual(new PointF(2, 2), transformation.Center);
}
public void CanTranslate()
{
var leftEye = new Eye {
X = 0, Y = 0
};
var rightEye = new Eye {
X = 0, Y = 4
};
var standardEyes = new List <Eye>
{
new Eye {
X = 3, Y = 5
},
new Eye {
X = 3, Y = 7
}
};
var transformation = Transformation.Construct(leftEye: leftEye, rightEye: rightEye, standardEyes: standardEyes);
Expect.FloatEquals(0.5, transformation.Scale);
Assert.AreEqual(new PointF(3, 5), transformation.Translation);
}
public void BeInvariantOfEyeOrder()
{
var leftEye = new Eye {
X = 0, Y = 0
};
var rightEye = new Eye {
X = 3, Y = 4
};
var standardEyes = new List <Eye>
{
new Eye {
X = 3, Y = 5
},
new Eye {
X = 3, Y = 7
}
};
var transformation = Transformation.Construct(leftEye: leftEye, rightEye: rightEye, standardEyes: standardEyes);
var sameTransformation = Transformation.Construct(leftEye: rightEye, rightEye: leftEye, standardEyes: standardEyes);
Expect.FloatEquals(transformation.Scale, sameTransformation.Scale);
Assert.AreEqual(transformation.Translation, sameTransformation.Translation);
}