/// <summary>
/// Determines if the bounds of a sub grid intersects a given triangle
/// </summary>
public static bool SubGridIntersectsTriangle(BoundingWorldExtent3D extents, XYZ h1, XYZ h2, XYZ v)
{
// If any of the triangle vertices are in the cell extents then 'yes'
if (extents.Includes(h1.X, h1.Y) || extents.Includes(h2.X, h2.Y) || extents.Includes(v.X, v.Y))
{
return(true);
}
// If any of the sub grid corners sit in the triangle then 'yes'
{
if (XYZ.PointInTriangle(h1, h2, v, extents.MinX, extents.MinY) ||
XYZ.PointInTriangle(h1, h2, v, extents.MinX, extents.MaxY) ||
XYZ.PointInTriangle(h1, h2, v, extents.MaxX, extents.MaxY) ||
XYZ.PointInTriangle(h1, h2, v, extents.MaxX, extents.MinY))
{
return(true);
}
}
// If any of the extent and triangle lines intersect then also 'yes'
if (LineIntersection.LinesIntersect(extents.MinX, extents.MinY, extents.MaxX, extents.MinY, h1.X, h1.Y, h2.X, h2.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MaxX, extents.MinY, extents.MaxX, extents.MaxY, h1.X, h1.Y, h2.X, h2.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MaxY, extents.MaxX, extents.MaxY, h1.X, h1.Y, h2.X, h2.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MinY, extents.MinX, extents.MaxY, h1.X, h1.Y, h2.X, h2.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MinY, extents.MaxX, extents.MinY, h1.X, h1.Y, v.X, v.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MaxX, extents.MinY, extents.MaxX, extents.MaxY, h1.X, h1.Y, v.X, v.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MaxY, extents.MaxX, extents.MaxY, h1.X, h1.Y, v.X, v.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MinY, extents.MinX, extents.MaxY, h1.X, h1.Y, v.X, v.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MinY, extents.MaxX, extents.MinY, v.X, v.Y, h2.X, h2.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MaxX, extents.MinY, extents.MaxX, extents.MaxY, v.X, v.Y, h2.X, h2.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MaxY, extents.MaxX, extents.MaxY, v.X, v.Y, h2.X, h2.Y, out _, out _, false, out _) ||
LineIntersection.LinesIntersect(extents.MinX, extents.MinY, extents.MinX, extents.MaxY, v.X, v.Y, h2.X, h2.Y, out _, out _, false, out _))
{
return(true);
}
// Otherwise 'no'
return(false);
}
public void Includes_Point()
{
var bound = new BoundingWorldExtent3D(0, 0, 100, 100);
bound.Includes(0, 0).Should().BeTrue();
bound.Includes(100, 0).Should().BeTrue();
bound.Includes(0, 100).Should().BeTrue();
bound.Includes(100, 100).Should().BeTrue();
bound.Includes(-1, -1).Should().BeFalse();
bound.Includes(101, 0).Should().BeFalse();
bound.Includes(0, 101).Should().BeFalse();
bound.Includes(101, 101).Should().BeFalse();
}