public void WhenParticleLifeIsPointFive_SetsColourBetweenInitialAndFinal()
{
var particle = new Particle
{
Age = new []{ 0.5f },
R = new float[1],
G = new float[1],
B = new float[1]
};
var subject = new ColourInterpolator2
{
InitialColour = new Colour(1f, 0f, 0f),
FinalColour = new Colour(0f, 0f, 1f)
};
unsafe
{
subject.Update(0.01666f, ref particle, 1);
particle.R[0].Should().BeApproximately(0.5f, 0.000001f);
particle.G[0].Should().BeApproximately(0f, 0.000001f);
particle.B[0].Should().BeApproximately(0.5f, 0.000001f);
}
}
public void IteratesOverEachParticle()
{
var buffer = new Particle
{
Age = new float[100],
R = new float[100],
G = new float[100],
B = new float[100]
};
for (var i = 0; i < buffer.Age.Length; i++)
buffer.Age[i] = 1.0f;
var subject = new ColourInterpolator2
{
InitialColour = new Colour(1f, 0f, 0f),
FinalColour = new Colour(0f, 0f, 1f)
};
subject.Update(0.1666666f, ref buffer, buffer.Age.Length);
for (int i = 0; i < buffer.Age.Length; i++)
{
buffer.B[0].Should().BeApproximately(1f, 0.000001f);
}
}
public void WhenParticleLifeIsOne_SetsFinalColour()
{
var particle = new Particle
{
Age = new []{1f},
R = new float[1],
G = new float[1],
B = new float[1]
};
var subject = new ColourInterpolator2
{
InitialColour = new Colour(1f, 0f, 0f),
FinalColour = new Colour(0f, 0f, 1f)
};
subject.Update(0.01666f, ref particle, 1);
particle.R[0].Should().BeApproximately(0f, 0.000001f);
particle.G[0].Should().BeApproximately(0f, 0.000001f);
particle.B[0].Should().BeApproximately(1f, 0.000001f);
}