public static Scene FromString(string fileContent)
{
Scene scene = new Scene();
fileContent = fileContent.ToLower().Replace("\r", string.Empty).Replace("\t", string.Empty).Replace(".", ",");
var splitted = fileContent.Split('}');
foreach (var split in splitted)
{
var innerSplit = split.Split('{');
var name = innerSplit[0].Trim();
switch (name)
{
case "camera":
Camera camera = Camera.FromString(innerSplit[1]);
scene.camera = camera;
break;
case "light":
Light light = Light.FromString(innerSplit[1]);
scene.lights.Add(light);
break;
case "material":
Material material = Material.FromString(innerSplit[1]);
scene.materials.Add(material);
break;
case "solid":
Solid solid = Solid.FromString(innerSplit[1]);
scene.solids.Add(solid);
break;
case "image":
Enox.Framework.Image image = Enox.Framework.Image.FromString(innerSplit[1]);
scene.image = image;
break;
}
}
return scene;
}
public static Color Trace(Scene scene, Ray r, int max)
{
IntersectionResult tr = NearestIntersection(scene, r);
if (tr.triangle != null)
{
//v1:
//return scene.Materials[tr.MaterialIndex].Color;
// v2:
Color c = new Color(0, 0, 0, 1);
// contribuição luz ambiente:
foreach (var light in scene.Lights)
{
c += light.Color * scene.Materials[tr.triangle.MaterialIndex].Color *
scene.Materials[tr.triangle.MaterialIndex].Ambient;
}
// contribuição luz difusa
foreach (var light in scene.Lights)
{
Vector3 l = light.Position - tr.point;
float dist = Vector3.Length(l);
l = Vector3.Normalize(l);
float cost = tr.triangle.Normal.Dot(l);
Ray s = new Ray()
{
origin = tr.point,
direction = l
};
if (IsExposedToLight(scene, s, dist) && cost > 0)
c = c + light.Color * scene.Materials[tr.triangle.MaterialIndex].Color
* scene.Materials[tr.triangle.MaterialIndex].Diffuse * cost;
}
// reflection, material reflective?
if (scene.Materials[tr.triangle.MaterialIndex].Reflection > 0.0f)
{
float c1 = -tr.triangle.Normal.Dot(r.direction);
Vector3 rl = Vector3.Normalize(r.direction + (tr.triangle.Normal * 2.0f * c1));
Ray refl = new Ray()
{
origin = tr.point,
direction = rl
};
c += (max > 0 ? Ray.Trace(scene, refl, --max) : new Color(0, 0, 0)) *
scene.Materials[tr.triangle.MaterialIndex].Reflection *
scene.Materials[tr.triangle.MaterialIndex].Color;
}
else if (scene.Materials[tr.triangle.MaterialIndex].RefractionCoef > 0.0f)
{
Vector3 n1 = new Vector3();
double m1, m2;
if (RayEnters(r.direction, tr.triangle.Normal))
{
n1 = tr.triangle.Normal;
m1 = 1.0f; // air
m2 = scene.Materials[tr.triangle.MaterialIndex].RefractionIndex;
}
else
{
n1 = tr.triangle.Normal * -1;
m1 = scene.Materials[tr.triangle.MaterialIndex].RefractionIndex;
m2 = 1.0f;
}
double c1 = -(n1).Dot(r.direction);
double m = m1 / m2;
double c2 = Math.Sqrt(1 - m * m * (1 - c1 * c1));
Vector3 rr = Vector3.Normalize((r.direction * (float)m) + n1 * (float)(m * c1 - c2));
Ray refr = new Ray()
{
origin = tr.point,
direction = rr
};
c += (max > 0 ? Ray.Trace(scene, refr, --max) : new Color(0, 0, 0)) *
scene.Materials[tr.triangle.MaterialIndex].RefractionCoef *
scene.Materials[tr.triangle.MaterialIndex].Color;
}
return c;
}
return scene.Image.Color;
}
private static IntersectionResult NearestIntersection(Scene scene, Ray r)
{
Vector3 intersectionPoint = new Vector3(0, 0, 0);
double tmin = double.MaxValue;
Triangle nearestTriangle = null;
foreach (Solid s in scene.Solids)
{
foreach (Triangle tr in s.Triangles)
{
float t = (float)Intersection(r, tr);
if (t > 0 && t < tmin)
{
tmin = t;
nearestTriangle = tr;
intersectionPoint = r.origin + (r.direction * t); // p(t)
}
}
}
return new IntersectionResult() {
triangle = nearestTriangle,
point = intersectionPoint
};
}
private static bool IsExposedToLight(Scene scene, Ray r, float dist)
{
// if (intersection => light : triangles) return true; // basta encontrar 1 (mas dentro da largura entre a luz e o ponto)
foreach (Solid s in scene.Solids)
{
foreach (Triangle tr in s.Triangles)
{
float t = (float)Intersection(r, tr);
if (t > 0 && t < dist) return false;
}
}
return true;
}
private void loadToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "Text Files (*.txt)|*.txt|SceneX Files (.scx)|*.scx";
ofd.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory + "\\Content\\";
if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK && ofd.FileName != string.Empty)
{
try
{
if (ofd.FileName.ToLower().EndsWith(".scx"))
{
myScene = (Scene)Serializer.DeserializeObject(ofd.FileName);
}
else
{
myScene = Scene.FromFile(ofd.FileName);
}
SetScene();
SetViewport();
SetDisplayList();
sceneViewGLControl.Invalidate();
propertyGrid1.SelectedObject = myScene;
//MessageBox.Show("Scene loaded with success!", "Sucess!");
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error!");
}
}
}
