private void storePhoton(Photon photon, EnlightenmentType enlightenmentType) { switch (enlightenmentType) { //case EnlightenmentType.Direct: // //Do nothing - Classic RayTracing // ; //break; case EnlightenmentType.Indirect: this.storedIndirect++; this.indirectEnlightenment.Store(photon); break; case EnlightenmentType.Caustics: this.storedCaustic++; this.CausticsEnlightenment.Store(photon); break; } }
private void storePhoton(Photon photon, EnlightenmentType enlightenmentType) { switch (enlightenmentType) { //case EnlightenmentType.Direct: // //Do nothing - Classic RayTracing // ; //break; case EnlightenmentType.Indirect: this.storedIndirect++; this.indirectEnlightenment.Store(photon); break; case EnlightenmentType.Caustics: this.storedCaustic++; this.CausticsEnlightenment.Store(photon); break; } }
public void ShootPhoton(Photon photon, int depth, EnlightenmentType enlightenmentType) { Intersection intersection; if (this.scene.FindIntersection(photon, out intersection) && (depth < this.MaxRecursions)) { Material material = intersection.HitPrimitive.Material; //this.scene.Shader = material.CreateShader(this.scene); //RGBColor color = this.scene.Shader.Shade(photon, intersection); //float avgPower = photon.Power.Average; //float probDiff = avgPower * material.KDiff; //float probSpec = avgPower * material.KSpec; //float avgPower = photon.Power.Average; RGBColor mixColor = (photon.Power * material.DiffuseColor); float maxColor = Max(mixColor.R, mixColor.G, mixColor.B) / Max(photon.Power.R, photon.Power.G, photon.Power.B); float probDiff = maxColor * material.KDiff; float probTrans = maxColor * material.KTrans; float probSpec = maxColor * material.KSpec; Photon rPhoton = new Photon(); Random rdn = new Random(); double randomValue = rdn.NextDouble(); if (randomValue <= probDiff) { photon.Position = intersection.HitPoint; //photon.Power = mixColor / probDiff; this.storePhoton(photon, enlightenmentType); rPhoton.Position = intersection.HitPoint; rPhoton.Power = mixColor / probDiff; rPhoton.Direction = Vector3D.ReflectedDiffuse(intersection.Normal); this.ShootPhoton(rPhoton, depth + 1, EnlightenmentType.Indirect); } else if (randomValue <= probSpec + probDiff) { rPhoton.Direction = Vector3D.Reflected(intersection.Normal, photon.Direction); //rPhoton.Direction.Normalize(); rPhoton.Position = intersection.HitPoint; rPhoton.Power = mixColor / probSpec; this.ShootPhoton(rPhoton, depth + 1, EnlightenmentType.Caustics); } else if (randomValue <= probSpec + probDiff + probTrans) { Vector3D T; //float eta = intersection.HitFromInSide // ? material.RefractIndex * 1 / this.scene.RefractIndex // : this.scene.RefractIndex * 1 / material.RefractIndex; //float eta = this.scene.RefractIndex * 1 / material.RefractIndex; float eta = (photon.PrevRefractIndex.IsEqual(material.RefractIndex)) ? material.RefractIndex * 1 / this.scene.RefractIndex : this.scene.RefractIndex * 1 / material.RefractIndex; if (Vector3D.Refracted(intersection.Normal, photon.Direction, out T, eta)) { rPhoton.Position = intersection.HitPoint; rPhoton.Direction = T; rPhoton.Power = mixColor / probTrans; rPhoton.PrevRefractIndex = material.RefractIndex; this.ShootPhoton(rPhoton, depth + 1, EnlightenmentType.Caustics); } } else { photon.Position = intersection.HitPoint; //Absorb this.storePhoton(photon, enlightenmentType); } } }
public void ShootPhoton(Photon photon, int depth, EnlightenmentType enlightenmentType) { Intersection intersection; if (this.scene.FindIntersection(photon, out intersection) && (depth < this.MaxRecursions)) { Material material = intersection.HitPrimitive.Material; //this.scene.Shader = material.CreateShader(this.scene); //RGBColor color = this.scene.Shader.Shade(photon, intersection); //float avgPower = photon.Power.Average; //float probDiff = avgPower * material.KDiff; //float probSpec = avgPower * material.KSpec; //float avgPower = photon.Power.Average; RGBColor mixColor = (photon.Power * material.DiffuseColor); float maxColor = Max(mixColor.R, mixColor.G, mixColor.B) / Max(photon.Power.R, photon.Power.G, photon.Power.B); float probDiff = maxColor * material.KDiff; float probTrans = maxColor * material.KTrans; float probSpec = maxColor * material.KSpec; Photon rPhoton = new Photon(); Random rdn = new Random(); double randomValue = rdn.NextDouble(); if (randomValue <= probDiff) { photon.Position = intersection.HitPoint; //photon.Power = mixColor / probDiff; this.storePhoton(photon, enlightenmentType); rPhoton.Position = intersection.HitPoint; rPhoton.Power = mixColor / probDiff; rPhoton.Direction = Vector3D.ReflectedDiffuse(intersection.Normal); this.ShootPhoton(rPhoton, depth + 1, EnlightenmentType.Indirect); } else if (randomValue <= probSpec + probDiff) { rPhoton.Direction = Vector3D.Reflected(intersection.Normal, photon.Direction); //rPhoton.Direction.Normalize(); rPhoton.Position = intersection.HitPoint; rPhoton.Power = mixColor / probSpec; this.ShootPhoton(rPhoton, depth + 1, EnlightenmentType.Caustics); } else if (randomValue <= probSpec + probDiff + probTrans) { Vector3D T; //float eta = intersection.HitFromInSide // ? material.RefractIndex * 1 / this.scene.RefractIndex // : this.scene.RefractIndex * 1 / material.RefractIndex; //float eta = this.scene.RefractIndex * 1 / material.RefractIndex; float eta = (photon.PrevRefractIndex.IsEqual(material.RefractIndex)) ? material.RefractIndex * 1 / this.scene.RefractIndex : this.scene.RefractIndex * 1 / material.RefractIndex; if (Vector3D.Refracted(intersection.Normal, photon.Direction, out T, eta)) { rPhoton.Position = intersection.HitPoint; rPhoton.Direction = T; rPhoton.Power = mixColor / probTrans; rPhoton.PrevRefractIndex = material.RefractIndex; this.ShootPhoton(rPhoton, depth + 1, EnlightenmentType.Caustics); } } else { photon.Position = intersection.HitPoint; //Absorb this.storePhoton(photon, enlightenmentType); } } }