public Hit Hit(Ray ray)
{
var oc = ray.origin - center;
float a = Vector3.Dot(ray.direction, ray.direction);
float b = Vector3.Dot(oc, ray.direction);
float c = Vector3.Dot(oc, oc) - radius * radius;
float dis = b * b - a * c;
if (dis > 0)
{
float e = (float)Math.Sqrt(dis);
float t = (-b - e) / a;
if (t > 0.007f)
{
var point = ray.Point(t);
return(new Hit(t, point, (point - center).Unit()));
}
t = (-b + e) / a;
if (t > 0.007f)
{
var point = ray.Point(t);
return(new Hit(t, point, (point - center).Unit()));
}
return(default);
public bool Hit(ref Ray ray, ref Hit hit)
{
var oc = ray.origin - center;
float a = Vector3.Dot(ray.direction, ray.direction);
float b = Vector3.Dot(oc, ray.direction);
float c = Vector3.Dot(oc, oc) - radius * radius;
float dis = b * b - a * c;
if (dis > 0)
{
float e = MathF.Sqrt(dis);
float t = (-b - e) / a;
if (t > 0.007f)
{
var point = ray.Point(t);
var unit = (point - center).Unit();
hit = new Hit(t, ref point, ref unit);
return(true);
}
t = (-b + e) / a;
if (t > 0.007f)
{
var point = ray.Point(t);
var unit = (point - center).Unit();
hit = new Hit(t, ref point, ref unit);
return(true);
}
}
return(false);
}
public Hit?Hit(Ray ray)
{
var oc = ray.origin.Sub(this.center);
float a = ray.direction.Dot(ray.direction);
float b = oc.Dot(ray.direction);
float c = oc.Dot(oc) - this.radius * this.radius;
float dis = b * b - a * c;
if (dis > 0)
{
float e = (float)Math.Sqrt(dis);
float t = (-b - e) / a;
if (t > 0.007f)
{
var hit = new Hit();
hit.dist = t;
hit.point = ray.Point(t);
hit.normal = hit.point.Sub(this.center).Unit();
return(hit);
}
t = (-b + e) / a;
if (t > 0.007f)
{
var hit = new Hit();
hit.dist = t;
hit.point = ray.Point(t);
hit.normal = hit.point.Sub(this.center).Unit();
return(hit);
}
return(null);
}
return(null);
}
public Hit Hit (Ray ray) {
var oc = ray.origin.Sub(this.center);
float a = ray.direction.Dot(ray.direction);
float b = oc.Dot(ray.direction);
float c = oc.Dot(oc) - this.radius * this.radius;
float dis = b * b - a * c;
if (dis > 0) {
float e = (float) Math.Sqrt(dis);
float t = (-b - e) / a;
if (t > 0.007f) {
var hit = new Hit();
hit.dist = t;
hit.point = ray.Point(t);
hit.normal = hit.point.Sub(this.center).Unit();
return hit;
}
t = (-b + e) / a;
if (t > 0.007f) {
var hit = new Hit();
hit.dist = t;
hit.point = ray.Point(t);
hit.normal = hit.point.Sub(this.center).Unit();
return hit;
}
return null;
}
return null;
}
