public void CreateFacePairs_WhenGivenAPolygon_CreateFacePairs()
{
var polygon = new[]
{
new Vector2(-5, 5),
new Vector2(5, 5),
new Vector2(5, -5),
new Vector2(-5, -5)
};
var pairs = helper.CreateFacePairs(polygon);
Assert.AreEqual(pairs.Length, polygon.Length);
for (int i = 0; i < polygon.Length; i++)
{
Assert.AreEqual(2, pairs[i].Length);
if (i == polygon.Length - 1)
{
Assert.AreEqual(pairs[i][0], polygon[i]);
Assert.AreEqual(pairs[i][1], polygon[0]);
}
else
{
Assert.AreEqual(pairs[i][0], polygon[i]);
Assert.AreEqual(pairs[i][1], polygon[i + 1]);
}
}
}
private void ResizeFace(IPlantCell aCell, IPlantCell bCell)
{
var aGeo = aCell.Geometry;
var aFace = aGeo.Face.Points;
var bGeo = bCell.Geometry;
var bFace = bGeo.Face.Points;
var pairs = geometryHelper.CreateFacePairs(bFace);
for (int i = 0; i < aFace.Length; i++)
{
if (!geometryHelper.IsInsidePolygon(aFace[i], bFace))
{
continue;
}
Vector2 nearest = FindNearestPoint(aFace[i], pairs);
Vector2 direction = (aFace[i] - nearest) * aCell.Turgidity;
aFace[i] = nearest;
ChangeFace(aGeo, aFace[i], direction);
}
}
public bool Colliding(IPlantCell a, IPlantCell b, bool allowOnLine)
{
if (!IsWithinHeight(a.Geometry, b.Geometry))
{
return(false);
}
var aFace = a.Geometry.Face.Points;
var bFace = b.Geometry.Face.Points;
var inside = IsInsidePolygon(aFace, bFace);
if (inside && allowOnLine)
{
var isOnLine = IsOnPolygonLine(aFace, helper.CreateFacePairs(bFace));
return(!isOnLine);
}
return(inside);
}