public static AxisAlignedBox2f Bounds(IEnumerable <Vector2f> positions)
{
AxisAlignedBox2f box = AxisAlignedBox2f.Empty;
foreach (Vector2f v in positions)
{
box.Contain(v);
}
return(box);
}
void SetBounds(AxisAlignedBox2f bounds)
{
m_bounds = bounds;
m_fXShift = (bounds.Min.x < 0) ? bounds.Min.x : -bounds.Min.x;
m_fYShift = (bounds.Min.y < 0) ? bounds.Min.y : -bounds.Min.y;
m_fScale = (bounds.Width > bounds.Height) ? bounds.Width : bounds.Height;
m_fCellSize = m_fScale / m_nCells;
}
public AxisAlignedBox2f Intersect(AxisAlignedBox2f box)
{
AxisAlignedBox2f intersect = new AxisAlignedBox2f(
Math.Max(Min.x, box.Min.x), Math.Max(Min.y, box.Min.y),
Math.Min(Max.x, box.Max.x), Math.Min(Max.y, box.Max.y));
if (intersect.Height <= 0 || intersect.Width <= 0)
{
return(AxisAlignedBox2f.Empty);
}
else
{
return(intersect);
}
}
public MarchingQuads(int nSubdivisions, AxisAlignedBox2f bounds, float fIsoValue)
{
m_stroke = new DPolyLine2f();
m_bounds = new AxisAlignedBox2f();
m_nCells = nSubdivisions;
SetBounds(bounds);
m_cells = null;
InitializeCells();
m_seedPoints = new ArrayList();
m_cellStack = new ArrayList();
m_bEdgeSigns = new bool[4];
m_fIsoValue = fIsoValue;
}
public AxisAlignedBox2f(AxisAlignedBox2f o)
{
Min = new Vector2f(o.Min);
Max = new Vector2f(o.Max);
}
public bool Intersects(AxisAlignedBox2f box)
{
return(!((box.Max.x < Min.x) || (box.Min.x > Max.x) || (box.Max.y < Min.y) || (box.Min.y > Max.y)));
}
public void Contain(AxisAlignedBox2f box)
{
Contain(box.Min);
Contain(box.Max);
}
