public bool HitSphere(jRay r, float tMin, float tMax, jCommonMaterial mat, out jRay or, out float t)
{
or = new jRay()
{
bAlive = 0,
color = r.color * JobGlobal.envColor
};
t = tMax;
Vector3 oc = r.origin - center;
float a = Vector3.Dot(r.direction, r.direction);
float b = Vector3.Dot(oc, r.direction);
float c = Vector3.Dot(oc, oc) - radius * radius;
float discriminant = b * b - a * c;
if (discriminant <= 0)
{
return(false);
}
float temp = (-b - Mathf.Sqrt(b * b - a * c)) / a;
if (temp < tMax && temp > tMin)
{
Vector3 p = r.origin + temp * r.direction;
Vector3 n = (p - center) / radius;
Vector3 refl = JobGlobal.emit(r.direction, n, mat.distance);
or.bAlive = 1;
or.origin = p;
or.direction = refl;
or.color = r.color * mat.albedo;
t = temp;
return(true);
}
temp = (-b + Mathf.Sqrt(b * b - a * c)) / a;
if (temp < tMax && temp > tMin)
{
Vector3 p = r.origin + temp * r.direction;
Vector3 n = (p - center) / radius;
Vector3 refl = JobGlobal.emit(r.direction, n, mat.distance);
or.bAlive = 1;
or.origin = p;
or.direction = refl;
or.color = r.color * mat.albedo;
t = temp;
return(true);
}
return(false);
}
public jSphere toJobSphere()
{
jCommonMaterial mat = new jCommonMaterial()
{
albedo = material.albedo,
distance = 0f
};
return(new jSphere()
{
center = transform.position,
radius = transform.lossyScale.x / 2f,
mat = mat
});
}
public void Execute(int index)
{
if (sourceRays[index].bAlive == 0)
{
destRays[index] = new jRay()
{
bAlive = 0,
color = sourceRays[index].color
};
return;
}
float closestSoFar = t_max;
bool hitAnything = false;
for (int i = 0; i < objs.Length; i++)
{
jRay r = sourceRays[index];
jCommonMaterial material = objs[i].mat;
float t = t_max;
jRay or = new jRay();
if (objs[i].HitSphere(r, t_min, closestSoFar, material, out or, out t))
{
hitAnything = true;
closestSoFar = t;
destRays[index] = or;
}
}
if (!hitAnything)
{
destRays[index] = new jRay()
{
bAlive = 0,
color = sourceRays[index].color * JobGlobal.envColor
};
}
}
