private void TriangulateRoadAdjacentToRiver(VoronoiCell cell, VoronoiDirection direction, Vector3 center, EdgeVertices e)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous(cell));
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next(cell));
Vector2 interpolators = GetRoadInterpolators(cell, direction);
Vector3 roadCenter = center;
if (cell.HasRiverBeginOrEnd)
{
roadCenter -= VoronoiMetrics.GetSolidEdgeMiddle(cell, cell.RiverBeginOrEndDirection) * (1 / 3f);
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous(cell))
{
roadCenter -= VoronoiMetrics.GetSecondCorner(cell, cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next(cell))
{
roadCenter -= VoronoiMetrics.GetFirstCorner(cell, cell.IncomingRiver) * 0.2f;
}
else if (cell.HasRoadOnThisSideOfRiver(direction))
{
Vector3 offset = cell.GetRiverMidpointOffset(direction);
if (previousHasRiver && nextHasRiver)
{
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
else
{
roadCenter += offset * 0.5f;
center += offset * 0.2f;
}
}
else
{
return;
}
Vector3 mL = Vector3.Lerp(roadCenter, e.V1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.V5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge);
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center);
}
}
private void TriangulateConnection(VoronoiCell cell, VoronoiDirection direction, EdgeVertices e1)
{
VoronoiCell neighbor = cell.GetNeighbor(direction);
Vector3 bridge = VoronoiMetrics.GetBridge(cell, direction);
EdgeVertices e2 = new EdgeVertices(
e1.V1 + bridge,
e1.V5 + bridge
);
if (cell.HasRiverThroughEdge(direction))
{
e2.V3 = Vector3.ClampMagnitude(e2.V3, neighbor.StreamBedElevation);
TriangulateRiverQuad(e1.V2, e1.V4, e2.V2, e2.V4,
cell.RiverSurfaceElevation, neighbor.RiverSurfaceElevation, 0.8f,
cell.HasIncomingRiver && cell.IncomingRiver == direction
);
}
if (cell.GetEdgeType(direction) == VoronoiEdgeType.Slope)
{
TriangulateEdgeTerraces(e1, cell, e2, neighbor, cell.HasRoadThroughEdge(direction));
}
else
{
TriangulateEdgeStrip(e1, cell.Color, e2, neighbor.Color, cell.HasRoadThroughEdge(direction));
}
VoronoiCell nextNeighbor = cell.GetNeighbor(direction.Next(cell));
if (cell.CornerConnections.Contains(direction))
{
Vector3 v5 = e1.V5 + VoronoiMetrics.GetBridge(cell, direction.Next(cell));
if (cell.Elevation <= neighbor.Elevation)
{
if (cell.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(e1.V5, cell, e2.V5, neighbor, v5, nextNeighbor);
}
else
{
TriangulateCorner(v5, nextNeighbor, e1.V5, cell, e2.V5, neighbor);
}
}
else if (neighbor.Elevation <= nextNeighbor.Elevation)
{
TriangulateCorner(e2.V5, neighbor, v5, nextNeighbor, e1.V5, cell);
}
else
{
TriangulateCorner(v5, nextNeighbor, e1.V5, cell, e2.V5, neighbor);
}
}
}
private void Triangulate(VoronoiCell cell, VoronoiDirection direction)
{
Vector3 center = cell.transform.localPosition;
EdgeVertices e = new EdgeVertices(
center + VoronoiMetrics.GetFirstSolidCorner(cell, direction),
center + VoronoiMetrics.GetSecondSolidCorner(cell, direction)
);
if (cell.HasRiver)
{
if (cell.HasRiverThroughEdge(direction))
{
e.V3 = Vector3.ClampMagnitude(e.V3, cell.StreamBedElevation);
if (cell.HasRiverBeginOrEnd)
{
TriangulateWithRiverBeginOrEnd(cell, direction, center, e);
}
else
{
TriangulateWithRiver(cell, direction, center, e);
}
}
else
{
TriangulateAdjacentToRiver(cell, direction, center, e);
}
}
else
{
TriangulateWithoutRiver(cell, direction, center, e);
}
if (cell.EdgeConnections.Contains(direction))
{
TriangulateConnection(cell, direction, e);
}
if (cell.IsUnderwater)
{
TriangulateWater(cell, direction, center);
}
}
private void TriangulateWithRiver(VoronoiCell cell, VoronoiDirection direction, Vector3 center, EdgeVertices e)
{
Vector3 centerR;
Vector3 centerL = centerR = center;
// 4 sided straight
if (cell.HasRiverThroughEdge(direction.Next2(cell)) && cell.HasRiverThroughEdge(direction.Previous2(cell)))
{
centerL = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Previous(cell)) *
(0.25f * VoronoiMetrics.InnerToOuter(cell, direction.Previous(cell)));
centerR = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Next(cell)) *
(0.25f * VoronoiMetrics.InnerToOuter(cell, direction.Next(cell)));
// 1 step turn
}
else if (cell.HasRiverThroughEdge(direction.Next(cell)))
{
centerL = center;
centerR = Vector3.Lerp(center, e.V5, 2 / 3f);
// 1 step turn
}
else if (cell.HasRiverThroughEdge(direction.Previous(cell)))
{
centerL = Vector3.Lerp(center, e.V1, 2 / 3f);
centerR = center;
// 2 step turn
}
else if (cell.HasRiverThroughEdge(direction.Next2(cell)))
{
centerL = center;
centerR = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Next(cell)) *
(0.5f * VoronoiMetrics.InnerToOuter(cell, direction.Next(cell)));
// 2 step turn
}
else if (cell.HasRiverThroughEdge(direction.Previous2(cell)))
{
centerL = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Previous(cell)) *
(0.5f * VoronoiMetrics.InnerToOuter(cell, direction.Previous(cell)));
centerR = center;
// 6 sided straight
}
else if (cell.HasRiverThroughEdge(direction.Next3(cell)) &&
cell.HasRiverThroughEdge(direction.Previous3(cell)))
{
centerL = center + VoronoiMetrics.GetFirstSolidCorner(cell, direction.Previous(cell)) * 0.25f;
centerR = center + VoronoiMetrics.GetSecondSolidCorner(cell, direction.Next(cell)) * 0.25f;
// 7 sided straight
}
else if (cell.HasRiverThroughEdge(direction.Previous3(cell)) &&
cell.HasRiverThroughEdge(direction.Next4(cell)) &&
cell.Neighbors.Count > 4)
{
centerL = center + VoronoiMetrics.GetFirstSolidCorner(cell, direction.Previous(cell)) * 0.25f;
centerR = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Next2(cell)) * 0.25f;
// 7 sided straight
}
else if (cell.HasRiverThroughEdge(direction.Previous4(cell)) &&
cell.HasRiverThroughEdge(direction.Next3(cell)) &&
cell.Neighbors.Count > 4)
{
centerL = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Previous2(cell)) * 0.25f;
centerR = center + VoronoiMetrics.GetSecondSolidCorner(cell, direction.Next(cell)) * 0.25f;
// 8 sided straight
}
else if (cell.HasRiverThroughEdge(direction.Previous4(cell)) &&
cell.HasRiverThroughEdge(direction.Next4(cell)) &&
cell.Neighbors.Count > 4)
{
centerL = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Previous2(cell)) * 0.25f;
centerR = center + VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Next2(cell)) * 0.25f;
// 3 step turn
}
else if (cell.HasRiverThroughEdge(direction.Previous3(cell)) &&
cell.HasRiverThroughEdge(direction.Next5(cell)) &&
cell.Neighbors.Count > 5)
{
centerR = center + VoronoiMetrics.GetSecondSolidCorner(cell, direction.Next2(cell)) * 0.25f;
centerL = center + VoronoiMetrics.GetFirstSolidCorner(cell, direction.Previous(cell)) * 0.25f;
// 3 step turn
}
else if (cell.HasRiverThroughEdge(direction.Previous5(cell)) &&
cell.HasRiverThroughEdge(direction.Next3(cell)) &&
cell.Neighbors.Count > 5)
{
centerL = center + VoronoiMetrics.GetFirstSolidCorner(cell, direction.Previous2(cell)) * 0.25f;
centerR = center + VoronoiMetrics.GetSecondSolidCorner(cell, direction.Next(cell)) * 0.25f;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.V1, 0.5f),
Vector3.Lerp(centerR, e.V5, 0.5f),
1 / 6f
);
m.V3 = Vector3.ClampMagnitude(m.V3, cell.StreamBedElevation);
center = Vector3.ClampMagnitude(center, cell.StreamBedElevation);
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
Terrain.AddTriangle(centerL, m.V1, m.V2);
Terrain.AddTriangleColor(cell.Color);
Terrain.AddQuad(centerL, center, m.V2, m.V3);
Terrain.AddQuadColor(cell.Color);
Terrain.AddQuad(center, centerR, m.V3, m.V4);
Terrain.AddQuadColor(cell.Color);
Terrain.AddTriangle(centerR, m.V4, m.V5);
Terrain.AddTriangleColor(cell.Color);
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.V2, m.V4, cell.RiverSurfaceElevation, 0.4f, reversed);
TriangulateRiverQuad(m.V2, m.V4, e.V2, e.V4, cell.RiverSurfaceElevation, 0.6f, reversed);
}
private void TriangulateAdjacentToRiver(VoronoiCell cell, VoronoiDirection direction, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(cell, direction, center, e);
}
// Inside two step turn
if (cell.HasRiverThroughEdge(direction.Next(cell)) &&
cell.HasRiverThroughEdge(direction.Previous(cell)))
{
if (cell.Neighbors.Count == 4)
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction) *
(0.25f * VoronoiMetrics.InnerToOuter(cell, direction));
}
else
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction) *
(0.5f * VoronoiMetrics.InnerToOuter(cell, direction));
}
// 6 sided adjacencies
}
else if (cell.Neighbors.Count == 6)
{
if (cell.HasRiverThroughEdge(direction.Next(cell)) &&
cell.HasRiverThroughEdge(direction.Previous2(cell)))
{
center += VoronoiMetrics.GetFirstSolidCorner(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous(cell)) &&
cell.HasRiverThroughEdge(direction.Next2(cell)))
{
center += VoronoiMetrics.GetSecondSolidCorner(cell, direction) * 0.25f;
}
// 7 sided adjacencies
}
else if (cell.Neighbors.Count == 7)
{
if (cell.HasRiverThroughEdge(direction.Next(cell)) &&
cell.HasRiverThroughEdge(direction.Previous2(cell)))
{
center += VoronoiMetrics.GetFirstSolidCorner(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous(cell)) &&
cell.HasRiverThroughEdge(direction.Next2(cell)))
{
center += VoronoiMetrics.GetSecondSolidCorner(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next2(cell)) &&
cell.HasRiverThroughEdge(direction.Previous2(cell)))
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next(cell)) &&
cell.HasRiverThroughEdge(direction.Previous3(cell)))
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Previous(cell)) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next3(cell)) &&
cell.HasRiverThroughEdge(direction.Previous(cell)))
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Next(cell)) * 0.25f;
}
}
else if (cell.Neighbors.Count == 8)
{
if (cell.HasRiverThroughEdge(direction.Next(cell)) &&
cell.HasRiverThroughEdge(direction.Previous3(cell)))
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Previous(cell)) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next2(cell)) &&
cell.HasRiverThroughEdge(direction.Previous2(cell)))
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next3(cell)) &&
cell.HasRiverThroughEdge(direction.Previous(cell)))
{
center += VoronoiMetrics.GetSolidEdgeMiddle(cell, direction.Next(cell)) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous(cell)) &&
cell.HasRiverThroughEdge(direction.Next4(cell)))
{
center += VoronoiMetrics.GetSecondSolidCorner(cell, direction.Next(cell)) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous2(cell)) &&
cell.HasRiverThroughEdge(direction.Next3(cell)))
{
center += VoronoiMetrics.GetSecondSolidCorner(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous3(cell)) &&
cell.HasRiverThroughEdge(direction.Next2(cell)))
{
center += VoronoiMetrics.GetFirstSolidCorner(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous4(cell)) &&
cell.HasRiverThroughEdge(direction.Next(cell)))
{
center += VoronoiMetrics.GetFirstSolidCorner(cell, direction.Previous(cell)) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous(cell)) &&
cell.HasRiverThroughEdge(direction.Next2(cell)))
{
center += VoronoiMetrics.GetSecondSolidCorner(cell, direction) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Previous2(cell)) &&
cell.HasRiverThroughEdge(direction.Next(cell)))
{
center += VoronoiMetrics.GetFirstSolidCorner(cell, direction) * 0.25f;
}
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.V1, 0.5f),
Vector3.Lerp(center, e.V5, 0.5f)
);
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
TriangulateEdgeFan(center, m, cell.Color);
}
