// createFluidBody
public void createFluidBody(List<Vector2> polygonPoints)
{
List<PolygonPoint> P2TPoints = new List<PolygonPoint>();
Polygon polygon;
Vector2 topLeft = polygonPoints[0];
Vector2 bottomRight = polygonPoints[0];
float spacing = RADIUS / 3.7f;
Random random = new Random();
foreach (Vector2 point in polygonPoints)
{
topLeft = Vector2.Min(topLeft, point);
bottomRight = Vector2.Max(bottomRight, point);
P2TPoints.Add(new PolygonPoint(point.X, point.Y));
}
polygon = new Polygon(P2TPoints);
for (float i = topLeft.X; i < bottomRight.X; i += spacing)
{
for (float j = topLeft.Y; j < bottomRight.Y; j += spacing)
{
Vector2 jitter = new Vector2(-1 + (float)random.NextDouble() * 2, -1 + (float)random.NextDouble() * 2) * (spacing * 0.2f);
Vector2 point = new Vector2(i, j) + jitter;
if (polygon.IsPointInside(new PolygonPoint(point.X, point.Y)))
createParticle(point, Vector2.Zero);
}
}
}
private List<Polygon> TriangulatePolyTree(PolyTree tree)
{
List<Polygon> polygonsGenerated = new List<Polygon>();
List<PolygonPoint> AllPoints = new List<PolygonPoint>();
foreach (PolyNode islands in tree.Childs)
{
List<PolygonPoint> floorPoints = new List<PolygonPoint>();
foreach (IntPoint point in SubdividePolygon(islands.Contour))
{
floorPoints.Add(new PolygonPoint(point.X / GenerationInformation.CalculationScaleFactor, point.Y / GenerationInformation.CalculationScaleFactor));
}
AllPoints.AddRange(floorPoints);
Polygon floorPolygon = new Polygon(floorPoints);
foreach (PolyNode nextNode in islands.Childs)
{
if (nextNode.IsHole)
{
List<PolygonPoint> holePoints = new List<PolygonPoint>();
foreach (IntPoint point in SubdividePolygon(nextNode.Contour))
{
holePoints.Add(new PolygonPoint(point.X / GenerationInformation.CalculationScaleFactor, point.Y / GenerationInformation.CalculationScaleFactor));
}
AllPoints.AddRange(holePoints);
floorPolygon.AddHole(new Polygon(holePoints));
}
}
if (GenerationInformation.UseGrid)
{
List<TriangulationPoint> steinerPoints = new List<TriangulationPoint>();
for (float x = (float)floorPolygon.BoundingBox.MinX - ((float)floorPolygon.BoundingBox.MinX % GenerationInformation.GridSize.x); x < floorPolygon.BoundingBox.MaxX; x += GenerationInformation.GridSize.x)
{
for (float y = (float)floorPolygon.BoundingBox.MinY - ((float)floorPolygon.BoundingBox.MinY % GenerationInformation.GridSize.y); y < floorPolygon.BoundingBox.MaxY; y += GenerationInformation.GridSize.y)
{
TriangulationPoint p = new TriangulationPoint(x, y);
if (floorPolygon.IsPointInside(p))
steinerPoints.Add(p);
}
}
CullSteinerPoints(ref steinerPoints, AllPoints, 0.1f);
floorPolygon.AddSteinerPoints(steinerPoints);
}
floorPolygon.Prepare(P2T.CreateContext(TriangulationAlgorithm.DTSweep));
P2T.Triangulate(floorPolygon);
polygonsGenerated.Add(floorPolygon);
}
return polygonsGenerated;
}