public void ShouldReturnZeroIfOneVectorHasAllComponentsEqualsZero()
{
PVector vectorA = new PVector(0, 0, 0);
PVector vectorB = new PVector(1, 1, 1);
float expectedTheta = 0f;
float actualTheta = vectorA.AngleBetween(vectorB);
Assert.Equal(expectedTheta, actualTheta);
actualTheta = vectorB.AngleBetween(vectorA);
Assert.Equal(expectedTheta, actualTheta);
}
public void ShouldReturnAngleBetweenVectorsOnXYPlane()
{
PVector vectorA = new PVector(1, 0);
PVector vectorB = new PVector(0, 1);
float expectedTheta = (float)Math.PI / 2;
float actualTheta = vectorA.AngleBetween(vectorB);
Assert.Equal(expectedTheta, actualTheta);
vectorA = new PVector(2, 7);
vectorB = new PVector(1, -4);
float expectedThetaInDegrees = 150.01836f;
float actualThetaInDegrees = Helpers.ConvertionHelper.RadiansToDegrees(vectorA.AngleBetween(vectorB));
Assert.Equal(expectedThetaInDegrees, actualThetaInDegrees);
}
