public bool checkOOBB(OOBB box)
{
// super maths here
bool[] pointInside = new bool[4];
for(int i = 0; i < 4; i++) // Loop through two perpendicular sides of the box
{
// Get normalised direction vector for box side
Vector2 ABdir = box.corners[(i + 1) % 4] - box.corners[i];
ABdir.Normalize();
// Get perpendicular direction vector
Vector2 PerpAB = new Vector2(ABdir.Y, ABdir.X * -1);
// get the two points on the circle that intersect the perpendicular direction vector
Vector2 circlePoint = centre + (radius * PerpAB);
Vector2 otherCirclePoint = centre + (radius * (-1 * PerpAB));
// See if either of those points is inisde the box
pointInside[i] = box.pointInBox(circlePoint) || box.pointInBox(otherCirclePoint);
}
// If any of the circle points are inside the box
if (pointInside[0] || pointInside[1] || pointInside[2] || pointInside[3])
{
return true;
}
else
{
foreach(Vector2 corner in box.corners)
{
if(checkPoint(corner))
{
return true;
}
}
}
return false;
}
/// <summary>
/// Does this box intesect another box?
/// </summary>
/// <param name="object2"></param>
/// <returns></returns>
public bool intersects(OOBB object2)
{
bool[] leftOfFace = new bool[4];
for (int p = 0; p < 4; p++) // for each corner of object 2
{
if(pointInBox(object2.corners[p]))
{
return true;
}
}
for (int p = 0; p < 4; p++) // for each corner in object 1
{
if(object2.pointInBox(corners[p]))
{
return true;
}
}
return false;
}
public Vector3 wallCollide(OOBB box)
{
bool[] pointInside = new bool[2];
for (int i = 0; i < 2; i++) // Loop through two perpendicular sides of the box
{
// Get normalised direction vector for box side
Vector2 ABdir = box.corners[(i + 1) % 4] - box.corners[i];
ABdir.Normalize();
// Get perpendicular direction vector
Vector2 PerpAB = new Vector2(ABdir.Y, ABdir.X * -1);
// get the two points on the circle that intersect the perpendicular direction vector
Vector2 circlePoint = centre + (radius * PerpAB);
Vector2 otherCirclePoint = centre + (radius * (-1 * PerpAB));
// See if either of those points is inisde the box
pointInside[i] = box.pointInBox(circlePoint) || box.pointInBox(otherCirclePoint);
}
// If any of the circle points are inside the box
if (pointInside[0] || pointInside[1])
{
return box.wallNormal;
}
else
{
for (int i = 0; i < 4; i++) // foreach Vector2 corner in other.corners
{
if (checkPoint(box.corners[i]))
{
// corner is inside circle
return box.wallNormal;
}
}
}
return Vector3.Zero;
}