void TriangulateEstuary(HexCell cell, HexDirection direction)
{
var neighbor = cell.GetNeighbor(direction);
EdgeVertices closerWaterEdge = cell.WaterEdges[(int)direction];
EdgeVertices furtherWaterEdge = neighbor.WaterEdges[(int)direction.Opposite()];
EdgeVertices furtherEdge = neighbor.Edges[(int)direction.Opposite()];
furtherEdge.V1.y = HexMetrics.WaterSurfaceY;
furtherEdge.V2.y = HexMetrics.WaterSurfaceY;
furtherEdge.V3.y = HexMetrics.WaterSurfaceY;
furtherEdge.V4.y = HexMetrics.WaterSurfaceY;
furtherEdge.V5.y = HexMetrics.WaterSurfaceY;
WaterShore.AddTriangleUnperturbed(furtherEdge.V5, closerWaterEdge.V2, closerWaterEdge.V1);
WaterShore.AddTriangleUnperturbed(furtherEdge.V1, closerWaterEdge.V5, closerWaterEdge.V4);
WaterShore.AddTriangleUV(new Vector2(0f, 1f), new Vector2(0f, 0f), new Vector2(0f, 0f));
WaterShore.AddTriangleUV(new Vector2(0f, 1f), new Vector2(0f, 0f), new Vector2(0f, 0f));
// left quad
// quad is rotated 90 degrees to the right so the diagonal connection is shorter
// it is done to maintain the symetry with the other quad
Estuaries.AddQuadUnperturbed(furtherEdge.V5, closerWaterEdge.V2, furtherEdge.V4, closerWaterEdge.V3);
Estuaries.AddQuadUV(new Vector2(0f, 1f), new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(0f, 0f));
// big triangle in the middle
Estuaries.AddTriangleUnperturbed(closerWaterEdge.V3, furtherEdge.V4, furtherEdge.V2);
Estuaries.AddTriangleUV(new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(0f, 1f));
// right quad
Estuaries.AddQuadUnperturbed(closerWaterEdge.V3, closerWaterEdge.V4, furtherEdge.V2, furtherEdge.V1);
Estuaries.AddQuadUV(new Vector2(0f, 0f), new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(0f, 1f));
// is incoming river
if (cell.IncomingRiver == direction)
{
Estuaries.AddQuadUV2(
new Vector2(1.5f, 1f), new Vector2(0.7f, 1.15f),
new Vector2(1f, 0.8f), new Vector2(0.5f, 1.1f));
Estuaries.AddTriangleUV2(
new Vector2(0.5f, 1.1f), new Vector2(1f, 0.8f), new Vector2(0f, 0.8f));
Estuaries.AddQuadUV2(
new Vector2(0.5f, 1.1f), new Vector2(0.3f, 1.15f),
new Vector2(0f, 0.8f), new Vector2(-0.5f, 1f));
}
else
{
// the U coordinates have to be mirrored for outgoing rivers
// the V coordinates are a little bit less straightforward
Estuaries.AddQuadUV2(
new Vector2(-0.5f, -0.2f), new Vector2(0.3f, -0.35f),
new Vector2(0f, 0f), new Vector2(0.5f, -0.3f));
Estuaries.AddTriangleUV2(
new Vector2(0.5f, -0.3f), new Vector2(0f, 0f), new Vector2(1f, 0f));
Estuaries.AddQuadUV2(
new Vector2(0.5f, -0.3f), new Vector2(0.7f, -0.35f),
new Vector2(1f, 0f), new Vector2(1.5f, -0.2f));
}
}
void TriangulateWater(HexDirection direction, HexCell cell)
{
EdgeVertices closerWaterEdge = cell.WaterEdges[(int)direction];
// water fan
Water.AddTriangleUnperturbed(cell.WaterCenter, closerWaterEdge.V1, closerWaterEdge.V5);
HexCell neighbor = cell.GetNeighbor(direction);
if (neighbor == null)
{
return;
}
// estuary
if (!neighbor.IsUnderwater && cell.HasRiverThroughEdge(direction))
{
TriangulateEstuary(cell, direction);
}
EdgeVertices furtherEdge = neighbor.Edges[(int)direction.Opposite()];
EdgeVertices furtherWaterEdge = neighbor.WaterEdges[(int)direction.Opposite()];
HexDirection nextDirection = direction.Next();
HexCell nextNeighbor = cell.GetNeighbor(nextDirection);
HexCell previousNeighbor = cell.GetNeighbor(direction.Previous());
// neighbor is under water as well
if (neighbor.IsUnderwater)
{
if (direction <= HexDirection.SouthEast)
{
Water.AddQuadUnperturbed(closerWaterEdge.V1, closerWaterEdge.V5, furtherWaterEdge.V5, furtherWaterEdge.V1);
}
}
// estuary is on the right side
else if (nextNeighbor != null && nextNeighbor.HasEstuaryThroughEdge(direction.Previous()))
{
Vector3 v4 = furtherEdge.V1;
v4.y = HexMetrics.WaterSurfaceY;
WaterShore.AddQuadUnperturbed(closerWaterEdge.V1, closerWaterEdge.V5, furtherWaterEdge.V5, v4);
WaterShore.AddQuadUV(0f, 0f, 0f, 1f);
}
// estuary is on the left side
else if (previousNeighbor != null && previousNeighbor.HasEstuaryThroughEdge(direction.Next()))
{
Vector3 v3 = furtherEdge.V5;
v3.y = HexMetrics.WaterSurfaceY;
WaterShore.AddQuadUnperturbed(closerWaterEdge.V1, closerWaterEdge.V5, v3, furtherWaterEdge.V1);
WaterShore.AddQuadUV(0f, 0f, 0f, 1f);
}
// standard connection quad
else if (!cell.HasRiverThroughEdge(direction))
{
WaterShore.AddQuadUnperturbed(closerWaterEdge.V1, closerWaterEdge.V5, furtherWaterEdge.V5, furtherWaterEdge.V1);
WaterShore.AddQuadUV(0f, 0f, 0f, 1f);
}
// calculate connection triangles
if (neighbor.IsUnderwater)
{
if (direction <= HexDirection.East && nextNeighbor != null && nextNeighbor.IsUnderwater)
{
Vector3 v3 = nextNeighbor.WaterEdges[(int)nextDirection.Opposite()].V5;
Water.AddTriangleUnperturbed(closerWaterEdge.V5, furtherWaterEdge.V1, v3);
}
}
// calculate water shore
else if (cell.HasRiverThroughEdge(direction) && nextNeighbor != null)
{
Vector3 v2 = neighbor.Edges[(int)direction.Opposite()].V1;
v2.y = HexMetrics.WaterSurfaceY;
Vector3 v3 = nextNeighbor.WaterEdges[(int)nextDirection.Opposite()].V5;
WaterShore.AddTriangleUnperturbed(closerWaterEdge.V5, v2, v3);
WaterShore.AddTriangleUV(new Vector2(0f, 0f), new Vector2(0f, 1f),
new Vector2(0f, nextNeighbor.IsUnderwater ? 0f : 1f));
}
else if (nextNeighbor != null)
{
Vector3 v2, v3;
// estuary is on the right side
if (cell.HasRiverThroughEdge(nextDirection))
{
v2 = furtherWaterEdge.V1;
v3 = nextNeighbor.Edges[(int)nextDirection.Opposite()].V5;
v3.y = HexMetrics.WaterSurfaceY;
}
// estuary is on the left side
else if (nextNeighbor.HasEstuaryThroughEdge(direction.Previous()))
{
v2 = furtherEdge.V1;
v2.y = HexMetrics.WaterSurfaceY;
v3 = nextNeighbor.WaterEdges[(int)nextDirection.Opposite()].V5;
}
else
{
v2 = furtherWaterEdge.V1;
v3 = nextNeighbor.WaterEdges[(int)nextDirection.Opposite()].V5;
}
WaterShore.AddTriangleUnperturbed(closerWaterEdge.V5, v2, v3);
WaterShore.AddTriangleUV(new Vector2(0f, 0f), new Vector2(0f, 1f),
new Vector2(0f, nextNeighbor.IsUnderwater ? 0f : 1f));
}
}
