private RealColor?GetColorForRay(Ray viewRay, int iteration = 1)
{
var materialColor = new RealColor();
var intersection = Scene.Objects
.Select(o => new { Obj = o, Dist = o.Intersect(viewRay) })
.Where(o => o.Dist != null)
.OrderBy(f => f.Dist)
.FirstOrDefault();
if (intersection != null)
{
var start = viewRay.Start + (intersection.Dist.Value * viewRay.Direction);
var normal = start - intersection.Obj.Position;
normal.Normalize();
foreach (var light in Scene.Lights)
{
var lightRay = Ray.FromStartAndEndPoints(start, light.Position);
if (Scene.Objects.Any(o => o.Intersect(lightRay) != null))
{
continue;
}
if (Vector3D.DotProduct(normal, lightRay.Direction) < 0)
{
continue;
}
var lambert = Vector3D.DotProduct(lightRay.Direction, normal);
materialColor += lambert * light.Color * intersection.Obj.Material.Diffuse;
}
if (iteration > 10 || intersection.Obj.Material.ReflectionCoefficient <= 0)
{
return(materialColor);
}
var reflectionAngle = 2.0f * (Vector3D.DotProduct(viewRay.Direction, normal));
var reflectionRay = new Ray(start, viewRay.Direction - reflectionAngle * normal);
var reflectedColor = GetColorForRay(reflectionRay, iteration + 1);
if (reflectedColor == null)
{
return(materialColor);
}
return(materialColor +
reflectedColor * intersection.Obj.Material.ReflectionCoefficient);
}
//return null;
return(new RealColor(Background));
}
private RealColor? GetColorForRay(Ray viewRay, int iteration = 1)
{
var materialColor = new RealColor();
var intersection = Scene.Objects
.Select(o => new {Obj = o, Dist = o.Intersect(viewRay)})
.Where(o => o.Dist != null)
.OrderBy(f => f.Dist)
.FirstOrDefault();
if (intersection != null)
{
var start = viewRay.Start + (intersection.Dist.Value*viewRay.Direction);
var normal = start - intersection.Obj.Position;
normal.Normalize();
foreach (var light in Scene.Lights)
{
var lightRay = Ray.FromStartAndEndPoints(start, light.Position);
if (Scene.Objects.Any(o => o.Intersect(lightRay) != null))
continue;
if (Vector3D.DotProduct(normal, lightRay.Direction) < 0)
continue;
var lambert = Vector3D.DotProduct(lightRay.Direction, normal);
materialColor += lambert * light.Color * intersection.Obj.Material.Diffuse;
}
if (iteration > 10 || intersection.Obj.Material.ReflectionCoefficient <= 0)
return materialColor;
var reflectionAngle = 2.0f * (Vector3D.DotProduct(viewRay.Direction, normal));
var reflectionRay = new Ray(start, viewRay.Direction - reflectionAngle * normal);
var reflectedColor = GetColorForRay(reflectionRay, iteration + 1);
if (reflectedColor == null)
return materialColor;
return materialColor +
reflectedColor*intersection.Obj.Material.ReflectionCoefficient;
}
//return null;
return new RealColor(Background);
}
public PointLight(RealColor color, float x, float y, float z)
{
Color = color;
Position = new Vector3D(x, y, z);
}
public PointLight(RealColor color, float x, float y, float z)
{
Color = color;
Position = new Vector3D(x, y, z);
}