protected virtual PreciseColor ProcessRay(ColoredRay3D ray, REScene scene, int level)
{
NearestIntersection intersections = GetIntersections(ray, scene);
var color = new PreciseColor();
Vector3D dir = (ray.End - ray.Start).Normalize();
Intersection intersection = intersections.Get();
if (intersection != null) {
if (intersection.Length > 0.05) {
Material material = intersection.Shape3D.Material;
color += material.DiffuseColor * material.AmbientIntensity;
RayTracingOptions options = GetRayTracingOptions(intersection.Shape3D);
if ((options & RayTracingOptions.Diffuse) > 0) {
color += GetDiffuseIllumination(intersection, scene);
}
if ((options & RayTracingOptions.Speculate) > 0) {
if (level < 5 && material.Shininess > 0.001) {
var reflected = ray;
Vector3D reflectedStart = ray.Start + dir * intersection.Length;
Vector3D reflectedEnd = reflectedStart + Math3D.GetReflectedVector(dir, intersection.Normal);
reflected.Start = reflectedStart;
reflected.End = reflectedEnd;
color += ProcessRay(reflected, scene, level + 1) * material.Shininess;
}
}
}
}
return color;
}
public override PreciseColor GetDiffuseIllumination(Intersection intersection)
{
Material material = intersection.Shape3D.Material;
Vector3D dir = position - intersection.Point;
float distance = dir.Length;
var ray = new ColoredRay3D { Start = intersection.Point, End = position };
NearestIntersection intersections = GetIntersections(ray);
bool shadowed = false;
Intersection obstacle = intersections.Get();
if (obstacle != null && obstacle.Length > 0.05 && obstacle.Length < distance) {
shadowed = true;
}
if (!shadowed) {
var diffuseColor = new PreciseColor(omni.Color.Red * material.DiffuseColor.Red,
omni.Color.Green * material.DiffuseColor.Green,
omni.Color.Blue * material.DiffuseColor.Blue);
float diffuseIntensity = omni.Power * (1 - material.Shininess) * System.Math.Abs(Vector3D.Scalar(dir.Normalize(), intersection.Normal));
diffuseIntensity /= dir.Length * dir.Length;
Vector3D reflected = Math3D.GetReflectedVector((intersection.Point - position).Normalize(), intersection.Normal);
float cosTeta = Vector3D.Scalar(reflected, (intersection.Ray.Start - intersection.Ray.End).Normalize());
float specularIntensity = cosTeta < 0 ? 0 : omni.Power * material.Shininess * (float)System.Math.Pow(cosTeta, 200);
if (intersection.Shape3D is RESphere) {
specularIntensity /= material.Shininess;
}
specularIntensity *= 0.05f;
return diffuseColor * diffuseIntensity + material.SpecularColor * specularIntensity;
}
return new PreciseColor();
}
public void Clear() {
_points = new PreciseColor[_height, _width];
for (int y = 0; y < _height; y++) {
for (int x = 0; x < _width; x++) {
_points[y, x] = new PreciseColor();
}
}
}
public static Canvas FromImage(Bitmap img) {
var res = new Canvas(img.Width, img.Height);
for (var y = 0; y < res.Height; y++) {
for (var x = 0; x < res.Width; x++) {
var clr = img.GetPixel(x, y);
res[x, y] = new PreciseColor(clr);
}
}
return res;
}
public bool Equals(PreciseColor other)
{
return (_red == other._red) && (_green == other._green) && (_blue == other._blue);
}
private void Form1_Load(object sender, EventArgs e)
{
_scene = new Scene3D();
_scene = new VrmlToG3DConverter().Convert(@"D:\dev\graph3d\Graph3D.Vrml.Test\Ant.wrl");
_scene.Shapes.First().CoordinateSystem.Translate(new Vector3D(-0.2f, 0.3f, 0.2f)).Scale(2, 2, 2).RotateV(0.2f).RotateU(0.1f).Translate(new Vector3D(0, 0, -0.2f));
PreciseColor color = new PreciseColor(0.6f, 0.3f, 0.3f) * 0.8f;
const float shininess = 0;
var b = new Box3D {
Material = { DiffuseColor = color, Shininess = shininess },
Width = 40,
Height = 40,
Depth = 120
};
_scene.Shapes.Add(b);
_scene.Shapes.Add(new Sphere3D {
CoordinateSystem = { Position = new Vector3D(0, 14, -2) },
Radius = 6.0f,
Material = {
DiffuseColor = new PreciseColor(0.0f, 0.1f, 0.0f) * 2.99f,
AmbientIntensity = 0.9f,
Shininess = 0.1f
}
});
_scene.Shapes.Add(new Sphere3D {
CoordinateSystem = { Position = new Vector3D(9, 14, -2) },
Radius = 6.0f,
Material = {
DiffuseColor = new PreciseColor(0.0f, 0.0f, 1.0f) * 0.19f,
AmbientIntensity = 0.95f,
Shininess = 0.05f
}
});
//_scene.Shapes.Add(new Box3D {
// CoordinateSystem = { Position = new Vector3D(3, 14, -6) },
// Width = 4,
// Height = 4,
// Depth = 4,
// Material = {
// DiffuseColor = new PreciseColor(0.0f, 0.0f, 1.0f) * 0.50f,
// AmbientIntensity = 0.2f,
// Shininess = 0.1f
// }
//});
const int omniCount = 5;
for (int i = 0; i < omniCount; i++) {
float angle = 2 * (float)System.Math.PI * i / omniCount;
const float radius = 16;
float x = 0 + radius * (float)System.Math.Cos(angle);
float y = -19.5f;
float z = -7 + radius * (float)System.Math.Sin(angle);
_scene.Lights.Add(new OmniLight3D {
Position = new Vector3D(x, y, z),
Color = new PreciseColor(1.0f, 1.0f, 1.0f),
Power = 1500.0f / omniCount
});
}
}
public void AddTest() {
var a = new PreciseColor(1, 2, 3);
var b = new PreciseColor(-2, -4, -6);
var c = a + b;
Assert.AreEqual(new PreciseColor(-1, -2, -3), c);
}
