public static (bool found, double positionZ) CalculateObjectPositionZ(Component_Scene scene, Component_GroupOfObjects toGroupOfObjects, double defaultPositionZ, Vector2 position, List <Component> destinationCachedBaseObjects = null)
{
var ray = new Ray(new Vector3(position, defaultPositionZ + 10000), new Vector3(0, 0, -20000));
if (toGroupOfObjects != null)
{
//when destination != null
double?maxPositionZ = null;
var baseObjects = destinationCachedBaseObjects ?? toGroupOfObjects.GetBaseObjects();
foreach (var baseObject in baseObjects)
{
//terrain
var terrain = baseObject as Component_Terrain;
if (terrain != null)
{
if (terrain.GetBounds2().Contains(position))
{
var height = terrain.GetHeight(position, false);
if (maxPositionZ == null || height > maxPositionZ.Value)
{
maxPositionZ = height;
}
}
}
//mesh in space
var meshInSpace = baseObject as Component_MeshInSpace;
if (meshInSpace != null)
{
if (meshInSpace.RayCast(ray, Component_Mesh.CompiledData.RayCastMode.Auto, out var scale, out _))
{
var height = ray.GetPointOnRay(scale).Z;
if (maxPositionZ == null || height > maxPositionZ.Value)
{
maxPositionZ = height;
}
}
}
//group of objects
var groupOfObjects = baseObject as Component_GroupOfObjects;
if (groupOfObjects != null)
{
//!!!!
}
}
if (maxPositionZ != null)
{
return(true, maxPositionZ.Value);
}
}
else
{
//when destination == null
var result = CalculateCreateObjectPositionByRay(scene, null, ray, false);
if (result.found)
{
return(true, result.position.Z);
}
}
return(false, defaultPositionZ);
}
Component_GroupOfObjects.Object[] UpdateOutputDefault(Component_Surface surface, Component_GroupOfObjects groupOfObjects)
{
var pointPositions = GetPointPositions();
var pointPositions2 = pointPositions.Select(a => a.ToVector2()).ToArray();
var pointBounds = GetPointPositionsBounds();
var lines = new List <Line2>();
for (int n = 0; n < pointPositions2.Length; n++)
{
lines.Add(new Line2(pointPositions2[n], pointPositions2[(n + 1) % pointPositions2.Length]));
}
var random = new Random(RandomSeed.Value);
double GetFadeFactor(Vector2 point)
{
var minLength = double.MaxValue;
foreach (var line in lines)
{
var d = Math.Min((line.Start - point).Length(), (line.End - point).Length());
var projected = MathAlgorithms.ProjectPointToLine(line.Start, line.End, point);
Rectangle b = new Rectangle(line.Start);
b.Add(line.End);
if (b.Contains(projected))
{
var d2 = (projected - point).Length();
if (d2 < d)
{
d = d2;
}
}
if (d < minLength)
{
minLength = d;
}
}
if (minLength >= FadeLength)
{
return(1);
}
return(minLength / FadeLength);
}
if (pointPositions.Length >= 3)
{
//calculate object count
int count;
{
double polygonArea;
{
var points = new List <Vector2>(pointPositions2);
points.Add(points[0]);
polygonArea = Math.Abs(points.Take(points.Count - 1)
.Select((p, i) => (points[i + 1].X - p.X) * (points[i + 1].Y + p.Y))
.Sum() / 2);
}
//!!!!среднее от всех групп
double minDistanceBetweenObjects;
{
var groups = surface.GetComponents <Component_SurfaceGroupOfElements>();
if (groups.Length != 0)
{
minDistanceBetweenObjects = 0;
foreach (var group in groups)
{
minDistanceBetweenObjects += group.MinDistanceBetweenObjects;
}
minDistanceBetweenObjects /= groups.Length;
}
else
{
minDistanceBetweenObjects = 1;
}
}
double radius = minDistanceBetweenObjects / 2;
double objectArea = Math.PI * radius * radius;
if (objectArea < 0.1)
{
objectArea = 0.1;
}
double maxCount = polygonArea / objectArea;
count = (int)(Strength * (double)maxCount);
count = Math.Max(count, 0);
}
var data = new List <Component_GroupOfObjects.Object>(count);
var scene = groupOfObjects.FindParent <Component_Scene>();
if (scene != null)
{
var destinationCachedBaseObjects = groupOfObjects.GetBaseObjects();
var pointContainerFindFreePlace = new PointContainer3D(pointBounds, 100);
for (int n = 0; n < count; n++)
{
surface.GetRandomVariation(new Component_Surface.GetRandomVariationOptions(), random, out var groupIndex, out var elementIndex, out var positionZ, out var rotation, out var scale);
var surfaceGroup = surface.GetGroup(groupIndex);
Vector3?position = null;
int counter = 0;
while (counter < 20)
{
Vector2 position2 = Vector2.Zero;
position2.X = MathEx.Lerp(pointBounds.Minimum.X, pointBounds.Maximum.X, random.NextFloat());
position2.Y = MathEx.Lerp(pointBounds.Minimum.Y, pointBounds.Maximum.Y, random.NextFloat());
if (MathAlgorithms.IsPointInPolygon(pointPositions2, position2))
{
double factor = 1;
if (FadeLength > 0)
{
factor = GetFadeFactor(position2);
}
if (factor >= 1 || random.NextDouble() <= factor)
{
var result = Component_Scene_Utility.CalculateObjectPositionZ(scene, groupOfObjects, pointBounds.GetCenter().Z, position2, destinationCachedBaseObjects);
if (result.found || destinationCachedBaseObjects.Count == 0)
{
var p = new Vector3(position2, destinationCachedBaseObjects.Count != 0 ? result.positionZ : pointBounds.GetCenter().Z);
//check by MinDistanceBetweenObjects
if (surfaceGroup == null || !pointContainerFindFreePlace.Contains(new Sphere(p, surfaceGroup.MinDistanceBetweenObjects)))
{
//found place to create
position = p;
break;
}
}
}
}
counter++;
}
if (position != null)
{
var obj = new Component_GroupOfObjects.Object();
obj.Element = 0; // (ushort)element.Index.Value;
obj.VariationGroup = groupIndex;
obj.VariationElement = elementIndex;
obj.Flags = Component_GroupOfObjects.Object.FlagsEnum.Enabled | Component_GroupOfObjects.Object.FlagsEnum.Visible;
obj.Position = position.Value + new Vector3(0, 0, positionZ);
obj.Rotation = rotation;
obj.Scale = scale;
obj.Color = ColorValue.One;
data.Add(obj);
//add to point container
pointContainerFindFreePlace.Add(ref obj.Position);
}
}
}
return(data.ToArray());
}
else
{
return(new Component_GroupOfObjects.Object[0]);
}
}
