public float intersect(Ray ray)
{
P3 E = ray.origin;
P3 O = this.center;
P3 EO = O.sub(E);
P3 V = ray.direction;
float r = this.radius;
float v = EO.dotProduct(V);
float dot = EO.dotProduct(EO);
float disc = (r * r) - (dot - (v * v));
if (disc < 0)
{
return -1;
}
else
{
float d = (float)Math.Sqrt(disc);
float time = (v - d);
if (time < 0)
{
return -1;
}
return time;
}
}
public RColor Coloring(P3 p, Ray r, SceneObject so)
{
P2 textureLoc = so.shape.toP2(p);
RColor textureColor = so.texture.texture(textureLoc);
RColor sumOfLights = new RColor(0, 0, 0);
RColor lightColor;
foreach (Light lightSource in Form1.lights)
{
lightColor = lightSource.illumination(p,so);
sumOfLights = sumOfLights.add(lightColor);
}
return RColor.multiplyColor(textureColor, sumOfLights);
}
public float intersect(Ray r)
{
P3 o = r.origin;
P3 v = r.direction;
r = new Ray(o, v);
if (n.dotProduct(v) < 0)
{
return -1;
}
float t = -(d + n.dotProduct(o)) / (n.dotProduct(v));
if (t < 0)
{
return -1;
}
return t;
}
public float distance(Ray r)
{
return shape.intersect(r);
}
public RColor colorAt(P3 p, Ray r)
{
return skin.Coloring(p, r, this);
}
//public static SceneObject shootRay(Ray r, out double d)
//{
// float dist;
// SceneObject obj = closest(r);
// if (obj == null)
// {
// return null;
// }
// dist = obj.distance(r);
// if (dist == infinity)
// {
// return null;
// }
// else
// {
// return obj;
// }
//}
//public static SceneObject closest(Ray ray)
//{
// SceneObject sceneObj = null;
// float dist, smallestDist = infinity;
// foreach (SceneObject obj in objects)
// {
// if ((dist = obj.distance(ray)) <= smallestDist)
// {
// smallestDist = dist;
// sceneObj = obj;
// }
// }
// return sceneObj;
//}
public void noName()
{
for (int i = 0; i < size; i++)
{
for (int j = 0; j < size; j++)
{
float size1 = size;
P3 p = new P3(i / size1 * 2.0f - 1, 0, j / size1 * 2.0f - 1);
Ray r = new Ray(camera, p.sub(camera).normalize());
float distance = sphere.intersect(r);
if (distance != -1)
{
P3 sp = r.travel(distance);
P3 n = sphere.normal(sp);
float intensity = n.dotProduct(direction);
if (intensity < 0)
{
intensity = 0;
}
pixels[i, j] = directional.scalarMultiply(intensity);
}
else
{
pixels[i, j] = new RColor(0, 0, 0);
}
}
}
panel.Refresh();
}