public SceneBuilder SetAttenuation(Attenuation att)
{
if (_rayTracer == null)
{
_rayTracer = new RayTracer();
}
_rayTracer.Attenuation = att;
return(this);
}
public Scene BuildScene()
{
SceneBuilder sb = new SceneBuilder();
string line;
InitPrimitiveProperties();
_transStack = new Stack <Transformation>();
_currentTransformation = new Transformation();
using (FileStream fs = new FileStream(_path, FileMode.Open, FileAccess.Read, FileShare.Read))
using (StreamReader sr = new StreamReader(fs))
{
while (!sr.EndOfStream)
{
line = sr.ReadLine().TrimStart(" \t".ToCharArray()).ToLowerInvariant();
if (string.IsNullOrWhiteSpace(line) || line[0] == '#')
{
continue;
}
string[] split = line.Split(" \t".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
switch (split[0])
{
#region General/Camera
case "size":
int width = int.Parse(split[1]);
int height = int.Parse(split[2]);
sb.SetSize(width, height);
break;
case "maxdepth":
int maxDepth = int.Parse(split[1]);
sb.SetMaxDepth(maxDepth);
break;
case "output":
sb.SetOutputPath(split[1]);
break;
case "camera":
RTPoint lFrom = PointFromConfig(split);
RTPoint lAt = PointFromConfig(split, 4);
RTVector up = VectorFromConfig(split, 7);
float fovy = float.Parse(split[10]);
sb.SetCamera(lFrom, lAt, up, fovy);
break;
#endregion
#region Geometry
case "sphere":
RTPoint center = PointFromConfig(split);
float radius = float.Parse(split[4]);
Sphere s = new Sphere(center, radius, _currentTransformation);
sb.AddGeoPrimitive(s, _currentMaterial);
InitPrimitiveProperties();
break;
case "maxverts":
int maxverts = int.Parse(split[1]);
_currentVertex = new List <Vertex>(maxverts);
break;
case "maxvertsnorms":
int maxvertsnorms = int.Parse(split[1]);
_currentVertex = new List <Vertex>(maxvertsnorms);
break;
case "vertex":
RTPoint vertex = PointFromConfig(split);
_currentVertex.Add(new Vertex(vertex));
break;
case "vertexnormal":
RTPoint vertexnorm = PointFromConfig(split);
RTVector normal = VectorFromConfig(split, 3);
_currentVertex.Add(new Vertex(vertexnorm, normal));
break;
case "tri":
case "trinormal":
int v1 = int.Parse(split[1]);
int v2 = int.Parse(split[2]);
int v3 = int.Parse(split[3]);
List <Vertex> vList = new List <Vertex>();
vList.Add(_currentVertex[v1]);
vList.Add(_currentVertex[v2]);
vList.Add(_currentVertex[v3]);
Triangle tri = new Triangle(vList, _currentTransformation);
sb.AddGeoPrimitive(tri, _currentMaterial);
InitPrimitiveProperties();
break;
#endregion
#region Transforms
case "translate":
RTVector transvec = VectorFromConfig(split);
_currentTransformation.AddTransform(new Translation(transvec));
break;
case "rotate":
RTVector rotaxis = VectorFromConfig(split);
float degrees = float.Parse(split[4]);
_currentTransformation.AddTransform(new Rotation(rotaxis, degrees));
break;
case "scale":
_currentTransformation.AddTransform(new Scaling(float.Parse(split[1]), float.Parse(split[2]), float.Parse(split[3])));
break;
case "pushtransform":
_transStack.Push(new Transformation(_currentTransformation));
break;
case "poptransform":
_currentTransformation = _transStack.Pop();
break;
#endregion
#region Lights
case "directional":
RTVector dir = VectorFromConfig(split);
RTColor dirCol = ColorFromConfig(split, 4);
sb.AddLight(new DirLight(dir, dirCol));
break;
case "point":
RTPoint source = PointFromConfig(split);
RTColor pointCol = ColorFromConfig(split, 4);
sb.AddLight(new PointLight(source, pointCol));
break;
case "attenuation":
Attenuation att = new Attenuation
{
Constant = float.Parse(split[1]),
Linear = float.Parse(split[2]),
Quadratic = float.Parse(split[3])
};
sb.SetAttenuation(att);
break;
case "ambient":
RTColor ambient = ColorFromConfig(split);
_currentMaterial.Properties.Ambient = ambient;
break;
#endregion
#region Materials
case "diffuse":
RTColor diffuse = ColorFromConfig(split);
_currentMaterial.Properties.Diffuse = diffuse;
break;
case "specular":
RTColor spec = ColorFromConfig(split);
_currentMaterial.Properties.Specular = spec;
break;
case "shininess":
float shine = float.Parse(split[1]);
_currentMaterial.Properties.Shininess = shine;
break;
case "emission":
RTColor emission = ColorFromConfig(split);
_currentMaterial.Properties.Emission = emission;
break;
#endregion
}
}
}
return(sb.Build());
}
