/// <summary>
/// Construct new light info instance
/// </summary>
/// <param name="intensity">Base intensity</param>
/// <param name="color">Base color</param>
/// <param name="attenuation">Attenuation information</param>
public Light(float intensity, Color color, LightAttenuation attenuation) : this()
{
this.intensity = intensity;
this.attenuation = attenuation;
SetColor(color);
}
/// <summary>
/// Clone this instance
/// </summary>
/// <returns>Deep copy of this instance</returns>
public object Clone()
{
var other = new LightAttenuation()
{
radius = this.radius,
useRadius = this.useRadius,
attenFactors = new float[3]
};
attenFactors.CopyTo(other.attenFactors, 0);
return(other);
}
/// <summary>
/// Create new light attenuation instance from given explicit factors.
/// </summary>
/// <param name="factors">An array of exactly 3 float values, describing the three factors a, b and c of the
/// attenuation polynomial</param>
/// <returns>Light attenuation instance based on given factors</returns>
/// <exception cref="ArgumentException">If the length of given factor array is not exactly 3</exception>
public static LightAttenuation FromFactors(params float[] factors)
{
if (factors.Length != 3)
{
throw new ArgumentException(String.Format("Expected 3 factors, got {0}", factors.Length));
}
var att = new LightAttenuation()
{
useRadius = 0,
attenFactors = new float[3]
};
factors.CopyTo(att.attenFactors, 0);
return(att);
}