static public IGrid <T> Circle <T>(int radius, Operation <T, float> operation)
{
int diameter = radius * 2;
VectorF2 center = new VectorF2(radius, radius);
return(Operation <T>(diameter, diameter,
(x, y) => operation(center.GetDistanceTo(new VectorF2(x, y)) / radius)
));
}
static public float CalculateTriangleShortestToLongestSideRatio(this VectorF2 point1, VectorF2 point2, VectorF2 point3)
{
float a;
float b;
float c;
point1.GetDistanceTo(point2).Order(
point2.GetDistanceTo(point3),
point3.GetDistanceTo(point1),
out c, out b, out a
);
return(c / a);
}
static public float CalculateTriangleArea(this VectorF2 point1, VectorF2 point2, VectorF2 point3)
{
float a;
float b;
float c;
point1.GetDistanceTo(point2).Order(
point2.GetDistanceTo(point3),
point3.GetDistanceTo(point1),
out c, out b, out a
);
float ab = a - b;
float t1 = a + (b + c);
float t2 = c - ab;
float t3 = c + ab;
float t4 = a + (b - c);
return(0.25f * Mathq.Sqrt(t1 * t2 * t3 * t4));
}
static public VectorF2 GetPointNearLine(this VectorF2 item, VectorF2 target, float distance, float offset)
{
return(item.GetPointNearLineByPercent(target, distance / item.GetDistanceTo(target), offset));
}
static public VectorF2 GetPointOnLineSegment(this VectorF2 item, VectorF2 target, float distance)
{
return(item.GetPointOnLineSegmentByPercent(target, distance / item.GetDistanceTo(target)));
}