FluidInfo ILineFluidAffectable.GetFluidInfo(GetTangentCallback callback, Line line)
{
if (polygons.Length == 1)
{
return(ShapeHelper.GetFluidInfo(Vertexes, callback, line));
}
List <Vector2D[]> submerged = new List <Vector2D[]>(polygons.Length);
for (int index = 0; index < polygons.Length; ++index)
{
Vector2D[] vertexes = ShapeHelper.GetIntersection(polygons[index], line);
if (vertexes.Length >= 3)
{
submerged.Add(vertexes);
}
}
if (submerged.Count == 0)
{
return(null);
}
Vector2D[][] newPolygons = submerged.ToArray();
Vector2D centroid = MultiPolygonShape.GetCentroid(newPolygons);
Scalar area = MultiPolygonShape.GetArea(newPolygons);
Vector2D tangent = callback(centroid);
Vector2D dragCenter;
Scalar dragArea;
ShapeHelper.GetFluidInfo(newPolygons, tangent, out dragCenter, out dragArea);
return(new FluidInfo(dragCenter, dragArea, centroid, area));
}
DragInfo IExplosionAffectable.GetExplosionInfo(Matrix2x3 matrix, Scalar radius, GetTangentCallback callback)
{
Vector2D[] vertexes2 = new Vector2D[Vertexes.Length];
for (int index = 0; index < vertexes2.Length; ++index)
{
vertexes2[index] = matrix * Vertexes[index];
}
Vector2D[] inter = ShapeHelper.GetIntersection(vertexes2, radius);
if (inter.Length < 3)
{
return(null);
}
Vector2D centroid = PolygonShape.GetCentroid(inter);
Vector2D tangent = callback(centroid);
Scalar min, max;
ShapeHelper.GetProjectedBounds(inter, tangent, out min, out max);
Scalar avg = (max + min) / 2;
return(new DragInfo(tangent * avg, max - min));
}
public static FluidInfo GetFluidInfo(Vector2D[] vertexes2, GetTangentCallback callback, Line line)
{
Vector2D centroid;
Scalar area;
Vector2D dragCenter;
Scalar dragArea;
Vector2D[] vertexes = ShapeHelper.GetIntersection(vertexes2, line);
if (vertexes.Length < 3)
{
return(null);
}
centroid = PolygonShape.GetCentroid(vertexes);
area = PolygonShape.GetArea(vertexes);
Vector2D tangent = callback(centroid);
Scalar min, max;
ShapeHelper.GetProjectedBounds(vertexes, tangent, out min, out max);
Scalar avg = (max + min) / 2;
dragCenter = tangent * avg;
dragArea = max - min;
return(new FluidInfo(dragCenter, dragArea, centroid, area));
}
