public void Insert(IBox2DCollider objectBounds)
{
//var cX = objectBounds.MinX;
//var cY = objectBounds.MinY;
var cX = objectBounds.MinX + 0.5f * (objectBounds.MaxX - objectBounds.MinX);
var cY = objectBounds.MinY + 0.5f * (objectBounds.MaxY - objectBounds.MinY);
// Convert to integer grid coordinates.
int minX = Math.Max((int)Math.Floor((cX - Bounds.MinX) / CellSize.X), 0);
int minY = Math.Max((int)Math.Floor((cY - Bounds.MinY) / CellSize.Y), 0);
cells[minX, minY].Add(objectBounds);
}
public void Insert(IBox2DCollider objectBounds)
{
// Convert the object's AABB to integer grid coordinates.
// Objects outside of the grid are clamped to the edge.
int minX = Math.Max((int)Math.Floor((objectBounds.MinX - Bounds.X) / CellSize.X), 0);
int maxX = Math.Min((int)Math.Floor((objectBounds.MaxX - Bounds.X) / CellSize.X), CellCountX - 1);
int minY = Math.Max((int)Math.Floor((objectBounds.MinY - Bounds.Y) / CellSize.Y), 0);
int maxY = Math.Min((int)Math.Floor((objectBounds.MaxY - Bounds.Y) / CellSize.Y), CellCountY - 1);
// Loop over the cells the object overlaps and insert the object.
for (int y = minY; y <= maxY; ++y)
{
for (int x = minX; x <= maxX; ++x)
{
cells[x, y].Add(objectBounds);
}
}
}
public static bool IntersectsX(this IBox2DCollider a, IBox2DCollider b)
{
bool noXintersect = (a.MaxX <= b.MinX) || (a.MinX >= b.MaxX);
return(!noXintersect);
}
public static bool IntersectsY(this IBox2DCollider a, IBox2DCollider b)
{
bool noYintersect = (a.MaxY <= b.MinY) || (a.MinY >= b.MaxY);
return(!noYintersect);
}
