public double3 RefractRay(Scene scene, Traceable traceable,
IntersectData data, Ray ray, TraceData traceData,
double3 n, double nDotRay,
RefractionIndex refractionIndex, out bool traceDataExceed)
{
traceDataExceed = false;
double criticalAngleCos = nDotRay <= 0 ? refractionIndex.CriticalInAngleCos : refractionIndex.CriticalOutAngleCos;
if (Math.Abs(nDotRay) >= criticalAngleCos)
{
if (traceData.Refractions > 0)
{
double k = nDotRay <= 0 ? refractionIndex.CoefficientIn : refractionIndex.CoefficientOut;
double3 f = ray.l.RefractI(n, nDotRay, k);
double3 p = traceable.Advance(data.P, f);
Ray refractedRay = new Ray(p, f);
traceData = traceData.GetRefracted();
double3 color = scene.Trace(refractedRay, traceData);
return(RefractionAttenuation * color);
}
else
{
TraceData.RefractionLimitExceedCount++;
traceDataExceed = true;
return(TraceData.RefractionLimitExceedColor);
}
}
else
{
if (traceData.Reflections > 0)
{
double3 r = ray.l.ReflectI(n, nDotRay);
double3 p = traceable.Advance(data.P, r);
Ray reflectedRay = new Ray(p, r);
traceData = traceData.GetReflected();
double3 color = scene.Trace(reflectedRay, traceData);
return(RefractionAttenuation * color);
}
else
{
TraceData.ReflectionLimitExceedCount++;
traceDataExceed = true;
return(TraceData.ReflectionLimitExceedColor);
}
}
}
public override double3 CalculateColor(Scene scene, Traceable traceable,
IntersectData data, Ray ray, TraceData traceData)
{
double3 n = traceable.GetNormal(data);
double nDotRay = n & ray.l;
double criticalAngleCos = nDotRay <= 0 ? RefractionIndex.CriticalInAngleCos : RefractionIndex.CriticalOutAngleCos;
if (Math.Abs(nDotRay) >= criticalAngleCos)
{
if (traceData.Refractions > 0)
{
double k = nDotRay <= 0 ? RefractionIndex.CoefficientIn : RefractionIndex.CoefficientOut;
double3 f = ray.l.RefractI(n, nDotRay, k);
double3 p = traceable.Advance(data.P, f);
Ray refractedRay = new Ray(p, f);
traceData = traceData.GetRefracted();
double3 color = scene.Trace(refractedRay, traceData);
return(RefractionAttenuation * color);
}
else
{
TraceData.RefractionLimitExceedCount++;
return(TraceData.RefractionLimitExceedCount);
}
}
else
{
if (traceData.Reflections > 0)
{
double3 r = ray.l.ReflectI(n, nDotRay);
double3 p = traceable.Advance(data.P, r);
Ray reflectedRay = new Ray(p, r);
traceData = traceData.GetReflected();
double3 color = scene.Trace(reflectedRay, traceData);
return(RefractionAttenuation * color);
}
else
{
TraceData.ReflectionLimitExceedCount++;
return(TraceData.ReflectionLimitExceedColor);
}
}
}
