private void CalculateWindingDirectionIfNeeded()
{
if (_windingDirection == WindingDirection.Unknown) // Only if unknown
{
_windingDirection = (Mathf.Sign(_signedArea) > 0.0f) ? WindingDirection.CCW : WindingDirection.CW;
}
}
public void UpdatePointPositionsWithTransforms(Transform[] pointTransforms) // Assuming unchanged point count
{
for (int index = 0; index < pointTransforms.Length; index++)
{
Transform eachPointTransform = pointTransforms[index];
_points[index] = eachPointTransform.localPosition.xy();
}
// Polygon calculations.
CalculateBounds();
CalculateArea();
CalculateCentroid();
_windingDirection = WindingDirection.Unknown;
CalculateWindingDirectionIfNeeded();
}
public static Polygon PolygonWithPoints(Vector2[] points, WindingDirection windingDirection)
{
Polygon polygon = new Polygon(points.Length);
// Create points (copy actually).
for (int index = 0; index < points.Length; index++)
{
polygon._points[index] = points[index];
}
// Polygon calculations.
polygon.CalculateBounds();
polygon.CalculateWindingDirectionIfNeeded();
polygon.CalculateArea();
polygon.CalculateCentroid();
// Create members.
polygon.CreateVerticesFromPoints();
polygon.CreateEdgesConnectingPoints();
return(polygon);
}
// Centering
public void RecalculateWindindDirection()
{
_windingDirection = WindingDirection.Unknown;
CalculateWindingDirectionIfNeeded();
}
public static Polygon PolygonWithPointTransforms(Transform[] pointTransforms, WindingDirection windingDirection) // Uses Transform.localPosition.xy()
{
// Create points array.
Vector2[] points = new Vector2[pointTransforms.Length];
for (int index = 0; index < pointTransforms.Length; index++)
{
Transform eachPointTransform = pointTransforms[index];
points[index] = eachPointTransform.localPosition.xy();
}
return(Polygon.PolygonWithPoints(points, windingDirection));
}
