private BezierSpline BuildSplineToCenter(IHexCell cell, HexDirection fromEdge)
{
Vector3 start = cell.AbsolutePosition + RenderConfig.GetEdgeMidpoint(fromEdge);
Vector3 controlOne = cell.AbsolutePosition + (
RenderConfig.GetEdgeMidpoint(fromEdge) + RenderConfig.GetEdgeMidpoint(fromEdge.Previous())
) / 3f;
var roadSpline = new BezierSpline(start);
roadSpline.AddCubicCurve(controlOne, cell.AbsolutePosition, cell.AbsolutePosition);
return(roadSpline);
}
private BezierSpline BuildSplineBetween(IHexCell cell, HexDirection directionOne, HexDirection directionTwo)
{
Vector3 controlOne = cell.AbsolutePosition + (
RenderConfig.GetEdgeMidpoint(directionOne) + RenderConfig.GetFirstCorner(directionOne.Previous())
) / 3f;
Vector3 controlTwo = cell.AbsolutePosition + (
RenderConfig.GetEdgeMidpoint(directionTwo) + RenderConfig.GetFirstCorner(directionTwo.Previous())
) / 3f;
var spline = new BezierSpline(cell.AbsolutePosition + RenderConfig.GetEdgeMidpoint(directionOne));
spline.AddCubicCurve(controlOne, controlTwo, cell.AbsolutePosition + RenderConfig.GetEdgeMidpoint(directionTwo));
return(spline);
}
private void AssembleRiverSplines()
{
RiverAssemblyCanon.RefreshRivers();
foreach (var river in RiverAssemblyCanon.Rivers)
{
RiverSection section = river[0];
var centerSpline = new BezierSpline(section.FlowFromOne == RiverFlow.Clockwise ? section.Start : section.End);
Vector3 centerToV1Direction, centerToV4Direction;
Vector3 v1Tangent, v4Tangent;
Vector3 controlOne, controlTwo;
Vector3 v1, v4;
bool isV1Internal, isV4Internal;
bool isControlOneNegative, isControlTwoNegative;
for (int i = 0; i < river.Count; i++)
{
section = river[i];
if (section.FlowFromOne == RiverFlow.Clockwise)
{
v1 = section.Start;
v4 = section.End;
isV1Internal = section.PreviousOnInternalCurve;
isV4Internal = section.NextOnInternalCurve;
}
else
{
v1 = section.End;
v4 = section.Start;
isV1Internal = section.NextOnInternalCurve;
isV4Internal = section.PreviousOnInternalCurve;
}
if (isV1Internal)
{
centerToV1Direction = (v1 - section.AdjacentCellOne.AbsolutePosition).normalized;
}
else
{
centerToV1Direction = (v1 - section.AdjacentCellTwo.AbsolutePosition).normalized;
}
if (isV4Internal)
{
centerToV4Direction = (v4 - section.AdjacentCellOne.AbsolutePosition).normalized;
}
else
{
centerToV4Direction = (v4 - section.AdjacentCellTwo.AbsolutePosition).normalized;
}
isControlOneNegative = (section.FlowFromOne == RiverFlow.Clockwise && isV1Internal) ||
(section.FlowFromOne == RiverFlow.Counterclockwise && !isV1Internal);
isControlTwoNegative = (section.FlowFromOne == RiverFlow.Clockwise && !isV4Internal) ||
(section.FlowFromOne == RiverFlow.Counterclockwise && isV4Internal);
v1Tangent = new Vector3(-centerToV1Direction.z, centerToV1Direction.y, centerToV1Direction.x);
v4Tangent = new Vector3(-centerToV4Direction.z, centerToV4Direction.y, centerToV4Direction.x);
controlOne = v1 + v1Tangent * RenderConfig.RiverCurveStrength * (isControlOneNegative ? -1f : 1f);
controlTwo = v4 + v4Tangent * RenderConfig.RiverCurveStrength * (isControlTwoNegative ? -1f : 1f);
centerSpline.AddCubicCurve(controlOne, controlTwo, v4);
}
var newRiverSpline = new RiverSpline()
{
CenterSpline = centerSpline,
WesternCells = river.Select(riverSection => riverSection.AdjacentCellOne).ToList(),
EasternCells = river.Select(riverSection => riverSection.AdjacentCellTwo).ToList(),
Directions = river.Select(riverSection => riverSection.DirectionFromOne).ToList(),
Flows = river.Select(riverSection => riverSection.FlowFromOne).ToList()
};
RiverSplines.Add(newRiverSpline);
}
}