/* The intention here is to find the AABB of the blob
* and then draw another quad that contains the AABB but
* is aligned to the edges of the hexagons rather than
* world axes. We then use that box's edges to draw lines
* that go across the hex diagonally.
*/
private void DrawLines(
List <IHexCell> farmBlob, out List <FarmLine> toNortheastLines, out List <FarmLine> toNorthwestLines
)
{
if (RenderConfig.FarmPatchMaxWidth <= 0f)
{
throw new InvalidOperationException("RenderConfig.FarmPatchMaxWidth must be greater than zero");
}
toNortheastLines = new List <FarmLine>();
toNorthwestLines = new List <FarmLine>();
Rect boundingRect = GetBlobRect(farmBlob);
Vector2 aabbBottomLeft = new Vector2(boundingRect.xMin, boundingRect.yMin);
Vector2 aabbBottomRight = new Vector2(boundingRect.xMax, boundingRect.yMin);
Vector2 aabbTopLeft = new Vector2(boundingRect.xMin, boundingRect.yMax);
Vector2 aabbTopRight = new Vector2(boundingRect.xMax, boundingRect.yMax);
Vector2 toNortheastDirection = RenderConfig.GetEdgeMidpointXZ(HexDirection.NE).normalized;
Vector2 toNorthwestDirection = new Vector2(toNortheastDirection.y, -toNortheastDirection.x).normalized;
Vector2 eastPoint, southPoint, westPoint;
Geometry2D.ClosestPointsOnTwoLines(
aabbBottomRight, toNortheastDirection,
aabbTopRight, toNorthwestDirection,
out eastPoint, out eastPoint
);
Geometry2D.ClosestPointsOnTwoLines(
aabbBottomLeft, toNorthwestDirection,
aabbBottomRight, toNortheastDirection,
out southPoint, out southPoint
);
Geometry2D.ClosestPointsOnTwoLines(
aabbBottomLeft, toNorthwestDirection,
aabbTopLeft, toNortheastDirection,
out westPoint, out westPoint
);
float southToWestDistance = (southPoint - westPoint).magnitude;
float southToEastDistance = (southPoint - eastPoint).magnitude;
//Draws the line segments going northeast
for (float t = 0; t <= 1f;)
{
Vector2 start = Vector2.Lerp(southPoint, westPoint, t);
toNortheastLines.Add(new FarmLine(start, toNortheastDirection));
HexHash hash = NoiseGenerator.SampleHashGrid(start);
t += Mathf.Lerp(RenderConfig.FarmPatchMinWidth, RenderConfig.FarmPatchMaxWidth, hash.A) / southToWestDistance;
}
//Draws the line segments going northwest
for (float t = 0; t <= 1f;)
{
Vector2 start = Vector2.Lerp(southPoint, eastPoint, t);
toNorthwestLines.Add(new FarmLine(start, toNorthwestDirection));
HexHash hash = NoiseGenerator.SampleHashGrid(start);
t += Mathf.Lerp(RenderConfig.FarmPatchMinWidth, RenderConfig.FarmPatchMaxWidth, hash.A) / southToEastDistance;
}
}
private void TriangulateCultureCorners_FlatEdge(
IHexCell center, IHexCell left, IHexCell right, IHexCell nextRight, HexDirection direction,
ICivilization centerOwner, ReadOnlyCollection <Vector2> centerRightContour,
ReadOnlyCollection <Vector2> rightCenterContour, IHexMesh cultureMesh
)
{
if (left != null && CivTerritoryLogic.GetCivClaimingCell(left) != centerOwner)
{
Color cultureColor = centerOwner.Template.Color;
var centerLeftContour = CellEdgeContourCanon.GetContourForCellEdge(center, direction.Previous());
var rightLeftContour = CellEdgeContourCanon.GetContourForCellEdge(right, direction.Previous2());
Vector2 centerLeftFirstInner = Vector2.Lerp(centerLeftContour.First(), center.AbsolutePositionXZ, RenderConfig.CultureWidthPercent);
Vector2 centerLeftLastInner = Vector2.Lerp(centerLeftContour.Last(), center.AbsolutePositionXZ, RenderConfig.CultureWidthPercent);
Vector2 rightLeftFirstInner = Vector2.Lerp(rightLeftContour.First(), right.AbsolutePositionXZ, RenderConfig.CultureWidthPercent);
Vector2 rightleftLastInner = Vector2.Lerp(rightLeftContour.Last(), right.AbsolutePositionXZ, RenderConfig.CultureWidthPercent);
Vector2 rayAlongCenterLeft = (centerLeftLastInner - centerLeftFirstInner).normalized;
Vector2 rayAlongRightLeft = (rightLeftFirstInner - rightleftLastInner).normalized;
Vector2 bezierControl;
if (!Geometry2D.ClosestPointsOnTwoLines(
centerLeftLastInner, rayAlongCenterLeft, rightLeftFirstInner, rayAlongRightLeft,
out bezierControl, out bezierControl
))
{
Debug.LogError("TriangulateCultureCorners_FlatEdge failed to find a valid control point");
return;
}
Vector3 pivotXYZ = new Vector3(centerLeftContour.Last().x, 0f, centerLeftContour.Last().y);
float paramDelta = 5f / RenderConfig.RiverQuadsPerCurve;
for (float t = 0; t < 1f; t = Mathf.Clamp01(t + paramDelta))
{
float nextT = Mathf.Clamp01(t + paramDelta);
Vector2 bezierOne = BezierQuadratic.GetPoint(centerLeftLastInner, bezierControl, rightLeftFirstInner, nextT);
Vector2 bezierTwo = BezierQuadratic.GetPoint(centerLeftLastInner, bezierControl, rightLeftFirstInner, t);
cultureMesh.AddTriangle(pivotXYZ, new Vector3(bezierOne.x, 0f, bezierOne.y), new Vector3(bezierTwo.x, 0f, bezierTwo.y));
cultureMesh.AddTriangleUV(new Vector2(0f, 1f), Vector2.zero, Vector2.zero);
cultureMesh.AddTriangleColor(cultureColor);
}
if (rightCenterContour.Count == 3)
{
Vector2 innerPoint = Vector2.Lerp(rightCenterContour.Last(), right.AbsolutePositionXZ, RenderConfig.CultureWidthPercent);
Vector2 secondToLastContour = rightCenterContour[rightCenterContour.Count - 2];
Vector2 lastContour = rightCenterContour.Last();
cultureMesh.AddTriangle(
new Vector3(innerPoint.x, 0f, innerPoint.y), new Vector3(secondToLastContour.x, 0f, secondToLastContour.y),
new Vector3(lastContour.x, 0f, lastContour.y)
);
cultureMesh.AddTriangleUV(new Vector2(0f, 0f), new Vector2(0f, 1f), new Vector2(0f, 1f));
cultureMesh.AddTriangleColor(cultureColor);
}
}
}