public static bool TryCollision(Particle p, Line line)
{
Vector L = p.Position - line.Point1;
Vector u = line.Point2 - line.Point1; u.Normalize();
double d = Math.Abs(L.OrthogonalDistance(u));
if (d > p.Radius)
{
return(false);
}
Vector v = p.Velocity;
Vector x = (v * u) * u;
Vector n = u.Orthogonal(); n.Normalize();
if (Vector.Direction(line.Point1, line.Point2, p.Position) < 0)
{
n = -n;
}
Vector y = (v * n) * n;
double e = Math.Min(p.Restitution, line.Restitution);
p.Velocity -= (2 * y) * e;
Vector G = p.Mass * new Vector(0, -World.Gravity);
//p.Force += G;
//Vector F = (G * u) * u;
Vector N = (G * n) * n;
//p.Force += N;
//? czy jest ok ?
if ((n ^ p.Velocity) > 0)
{
u = -u;
}
Vector T = 10000.9 * (N * u) * u;
//p.Force += T;
p.Position += (p.Radius - d) * -n;
return(true);
}
public static bool TryCollision(Particle p, Segment s)
{
Vector L = p.Position - s.Point1;
Vector u = s.Point2 - s.Point1; u.Normalize();
double d = Math.Abs(L.OrthogonalDistance(u));
if (d > p.Radius)
{
return(false);
}
Vector v = p.Velocity;
Vector x = (v * u) * u;
Vector n = u.Orthogonal(); n.Normalize();
if (Vector.Direction(s.Point1, s.Point2, p.Position) < 0)
{
n = -n;
}
Vector s1 = s.Point1 + n;
Vector s2 = s.Point2 + n;
Vector p1 = p.Position - s.Point1;
Vector p2 = p.Position - s.Point2;
Vector mid = s.Middle();
if ((mid - p.Position).Length > s.Length / 2) //nie ma zderzenia z odcinkiem
{
return(false);
}
//if ((s.Point1 - p.Position).Length > p.Radius && (s.Point2 - p.Position).Length > p.Radius)
// return false;
Vector y = (v * n) * n;
double e = Math.Min(p.Restitution, s.Restitution);
p.Velocity -= (2 * y) * e;
Vector G = p.Mass * new Vector(0, -World.Gravity);
//p.Force += G;
//Vector F = (G * u) * u;
Vector N = (G * n) * n;
//p.Force += N;
if ((n ^ p.Velocity) > 0)
{
u = -u;
}
Vector T = 10000.9 * (N * u) * u;
//p.Force += T;
p.Position += (p.Radius - d) * -n;
return(true);
}