public override bool hit(zRay r, float t_min, float t_max, ref hit_record rec)
{
if (rec.lastHit == id)
{
return(false);
}
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;
//Debug.Log("try hit " + discriminant + " " + r.origin + " " + r.direction);
if (discriminant > 0)
{
rec.mat = material;
float temp = (-b - Mathf.Sqrt(b * b - a * c)) / a;
if (temp < t_max && temp > t_min)
{
rec.t = temp;
rec.p = r.point_at_parameter(rec.t);
rec.normal = (rec.p - center) / radius;
rec.lastHit = id;
Debug.Log("hit");
if (DebugDrawer.isDebug)
{
DebugDrawer.points.Add(rec.p);
DebugDrawer.normals.Add(rec.normal);
}
return(true);
}
temp = (-b + Mathf.Sqrt(b * b - a * c)) / a;
if (temp < t_max && temp > t_min)
{
rec.t = temp;
rec.p = r.point_at_parameter(rec.t);
rec.normal = (rec.p - center) / radius;
rec.lastHit = id;
Debug.Log("hit");
if (DebugDrawer.isDebug)
{
DebugDrawer.points.Add(rec.p);
DebugDrawer.normals.Add(rec.normal);
}
return(true);
}
}
return(false);
}
public override bool hit(zRay r, float t_min, float t_max, ref hit_record rec)
{
if (rec.lastHit == id)
{
return(false);
}
Vector3 oc = r.origin - center(r.time);
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)
{
rec.mat = material;
float temp = (-b - Mathf.Sqrt(discriminant)) / a;
if (temp < t_max && temp > t_min)
{
rec.t = temp;
rec.p = r.point_at_parameter(rec.t);
rec.normal = (rec.p - center(r.time)) / radius;
rec.mat = material;
rec.lastHit = id;
return(true);
}
temp = (-b + Mathf.Sqrt(discriminant)) / a;
if (temp < t_max && temp > t_min)
{
rec.t = temp;
rec.p = r.point_at_parameter(rec.t);
rec.normal = (rec.p - center(r.time)) / radius;
rec.mat = material;
rec.lastHit = id;
return(true);
}
}
return(false);
}
public override bool hit(zRay r, float t_min, float t_max, ref hit_record rec)
{
if (Vector3.Dot(r.direction, normal) > 0)
{
return(false);
}
r = new zRay(trans.worldToLocalMatrix.MultiplyPoint(r.origin), trans.worldToLocalMatrix.MultiplyVector(r.direction));
float t = (k - r.origin.z) / r.direction.z;
if (t < t_min || t > t_max)
{
return(false);
}
float x = r.origin.x + t * r.direction.x;
float y = r.origin.y + t * r.direction.y;
if (x < x0 || x > x1 || y < y0 || y > y1)
{
return(false);
}
rec.uv = new Vector2((x - x0) / (x1 - x0), (y - y0) / (y1 - y0));
rec.t = t * trans.lossyScale.x;
rec.mat = material;
rec.p = trans.localToWorldMatrix.MultiplyPoint(r.point_at_parameter(t));
rec.normal = normal;
rec.lastHit = id;
if (DebugDrawer.isDebug)
{
DebugDrawer.points.Add(rec.p);
DebugDrawer.normals.Add(rec.normal);
//Debug.Log(r.origin + " " + r.direction);
//Debug.Log("rec.p " + rec.p + " local " + r.point_at_parameter(t));
//Debug.Log("id " + id);
}
return(true);
}
public override bool hit(zRay r, float t_min, float t_max, ref hit_record rec)
{
if (Vector3.Dot(normal, r.direction) > 0)
{
return(false);
}
Vector3 e1 = b - a;
Vector3 e2 = c - a;
Vector3 p = Vector3.Cross(r.direction, e2);
float det = Vector3.Dot(e1, p);
Vector3 T;
if (det > 0)
{
T = r.origin - a;
}
else
{
T = a - r.origin;
det = -det;
}
if (det < 0.0001f)
{
return(false);
}
float u = Vector3.Dot(T, p);
if (u < 0f || u > det)
{
return(false);
}
Vector3 Q = Vector3.Cross(T, e1);
float v = Vector3.Dot(r.direction, Q);
if (v < 0 || u + v > det)
{
return(false);
}
float t = Vector3.Dot(e2, Q);
float invDet = 1 / det;
t *= invDet;
u *= invDet;
v *= invDet;
rec.mat = material;
rec.t = t;
rec.p = r.point_at_parameter(t);
rec.normal = normal;
rec.lastHit = id;
if (DebugDrawer.isDebug)
{
DebugDrawer.points.Add(rec.p);
DebugDrawer.normals.Add(rec.normal);
}
return(true);
}
