public static bool PointOBBcolliding(MthLib.Vector3 point, MthLib.Matrix3 obb)
{
//Find nessesary values
MthLib.Vector3 diff = point - new MthLib.Vector3(obb.m3, obb.m6, 0);
MthLib.Vector3 xExtent = new MthLib.Vector3(obb.m1, obb.m4, 0);
MthLib.Vector3 yExtent = new MthLib.Vector3(obb.m2, obb.m5, 0);
//Check if the point is within the extents
bool insideX = Math.Abs(diff.Dot(xExtent)) > xExtent.Magnitude();
bool insideY = Math.Abs(diff.Dot(yExtent)) > yExtent.Magnitude();
//If it is within both, it is inside the OBB
return(insideX && insideY);
}
private static bool IsOverlapping(MthLib.Vector3 normal, Rect rect1, Rect rect2)
{
//Project the rect's corners onto the normal
float dot1 = normal.Dot(rect1.FL);
float dot2 = normal.Dot(rect1.FR);
float dot3 = normal.Dot(rect1.BL);
float dot4 = normal.Dot(rect1.BR);
//Find the furthest points
float min1 = Math.Min(dot1, Math.Min(dot2, Math.Min(dot3, dot4)));
float max1 = Math.Max(dot1, Math.Max(dot2, Math.Max(dot3, dot4)));
//Repeat for the second rect
dot1 = normal.Dot(rect2.FL);
dot2 = normal.Dot(rect2.FR);
dot3 = normal.Dot(rect2.BL);
dot4 = normal.Dot(rect2.BR);
float min2 = Math.Min(dot1, Math.Min(dot2, Math.Min(dot3, dot4)));
float max2 = Math.Max(dot1, Math.Max(dot2, Math.Max(dot3, dot4)));
//Are the projections overlapping?
return(min1 <= max2 && min2 <= max1);
}