public static ViewClipShape FromPoints(Vector2 point1, Vector2 point2, Vector2 point3, Vector2 point4, Vector2 point5, Vector2 point6)
{
var shape = new ViewClipShape(point1, point2, point3, point4, point5, point6);
shape.BuildAxis();
return(shape);
}
internal static bool Intersects(ref Rectangle shape1, ref ViewClipShape shape2)
{
int min, max;
//Check against rectangle axis
Project(shape1.Axis1, ref shape2, out min, out max);
if (shape1.A1Min > max || shape1.A1Max < min)
{
return(false);
}
Project(shape1.Axis2, ref shape2, out min, out max);
if (shape1.A2Min > max || shape1.A2Max < min)
{
return(false);
}
//Check against the viewclipshape axis - thre are at least 3
for (var i = 0; i < shape2.Count; i++)
{
Project(shape2.GetAxis(i), ref shape1, out min, out max);
if (shape2.GetMinScalar(i) > max || shape2.GetMaxScalar(i) < min)
{
return(false);
}
}
return(true);
}
internal static void Project(Vector2 axis, ref ViewClipShape shape, out int min, out int max)
{
min = GenerateScalar(shape.Point1, ref axis);
max = min;
var current = GenerateScalar(shape.Point2, ref axis);
if (current <= min)
{
min = current;
}
else
if (current > max)
{
max = current;
}
current = GenerateScalar(shape.Point3, ref axis);
if (current <= min)
{
min = current;
}
else
if (current > max)
{
max = current;
}
if (shape.Count < 4)
{
return;
}
current = GenerateScalar(shape.Point4, ref axis);
if (current <= min)
{
min = current;
}
else if (current > max)
{
max = current;
}
if (shape.Count < 5)
{
return;
}
current = GenerateScalar(shape.Point5, ref axis);
if (current <= min)
{
min = current;
}
else if (current > max)
{
max = current;
}
if (shape.Count < 6)
{
return;
}
current = GenerateScalar(shape.Point6, ref axis);
if (current <= min)
{
min = current;
}
else if (current > max)
{
max = current;
}
}
public bool Intersects(ViewClipShape shape)
{
return(Intersection.Intersects(ref this, ref shape));
}
