public void TriangulateWithRiver(HexDirection dir, HexCell cell, Vector3 center, EdgeVertices edges)
{
Vector3 centerL;
Vector3 centerR;
float centerLinePinch = 2.0f / 3.0f;
if (cell.HasRiverThroughEdge(dir.Opposite()))
{
centerL = center + HexMetrics.GetFirstSolidCorner(dir.Previous()) * HexMetrics.SubdivideFraction;
centerR = center + HexMetrics.GetSecondSolidCorner(dir.Next()) * HexMetrics.SubdivideFraction;
center = (centerL + centerR) / 2.0f;
}
else if (cell.HasRiverThroughEdge(dir.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, edges.v5, centerLinePinch);
}
else if (cell.HasRiverThroughEdge(dir.Previous()))
{
centerL = Vector3.Lerp(center, edges.v1, centerLinePinch);
centerR = center;
}
else if (cell.HasRiverThroughEdge(dir.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(dir.Next()) * (0.5f * HexMetrics.InnerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(dir.Previous()) * (0.5f * HexMetrics.InnerToOuter);
centerR = center;
}
EdgeVertices modifiedEdges = new EdgeVertices(Vector3.Lerp(centerL, edges.v1, 0.5f), Vector3.Lerp(centerR, edges.v5, 0.5f));
modifiedEdges.v3.y = center.y = edges.v3.y;
TriangulateEdgeStrip(modifiedEdges, Weights1, cell.TerrainTypeIndex, edges, Weights1, cell.CellIndex);
Terrain.AddTriangle(centerL, modifiedEdges.v1, modifiedEdges.v2);
Terrain.AddQuad(centerL, center, modifiedEdges.v2, modifiedEdges.v3);
Terrain.AddQuad(center, centerR, modifiedEdges.v3, modifiedEdges.v4);
Terrain.AddTriangle(centerR, modifiedEdges.v4, modifiedEdges.v5);
Vector3 indices = new Vector3(cell.CellIndex, cell.CellIndex, cell.CellIndex);
Terrain.AddTriangleCellData(indices, Weights1);
Terrain.AddQuadCellData(indices, Weights1);
Terrain.AddQuadCellData(indices, Weights1);
Terrain.AddTriangleCellData(indices, Weights1);
if (!cell.IsUnderwater)
{
bool reverse = cell.IncomingRiverDirection == dir;
TriangulateRiverQuad(centerL, centerR, modifiedEdges.v2, modifiedEdges.v4, cell.RiverSurfaceY, 0.4f, reverse, indices);
TriangulateRiverQuad(modifiedEdges.v2, modifiedEdges.v4, edges.v2, edges.v4, cell.RiverSurfaceY, 0.6f, reverse, indices);
}
}
void TriangulateAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) *
(HexMetrics.innerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) &&
cell.HasRiverThroughEdge(direction.Next2())
)
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f)
);
TriangulateEdgeStrip(m, color1, (int)cell.TerrainType, e, color1, (int)cell.TerrainType);
TriangulateEdgeFan(center, m, (int)cell.TerrainType);
}
// Rivers
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
// Left Vertex
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
// Right Vertex
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
// Middle Line
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f);
// Channel bottoms
m.v3.y = center.y = e.v3.y;
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);
if (!cell.IsUnderwater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed);
}
}
void TriangulateAdjacentToRiver(HexDirection direction, HexCell_Script cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics_Script.GetSolidEdgeMiddle(direction) * (HexMetrics_Script.innerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics_Script.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) &&
cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics_Script.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f));
TriangulateEdgeStrip(m, color1, cell.TerrainTypeIndex, e, color1, cell.TerrainTypeIndex);
TriangulateEdgeFan(center, m, cell.TerrainTypeIndex);
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f));
}
}
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.innerToOuter);
centerR = center;
}
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),
1f / 6f
);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
Vector3 indices;
indices.x = indices.y = indices.z = cell.Index;
terrain.AddTriangleCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddQuadCellData(indices, weights1);
terrain.AddTriangleCellData(indices, weights1);
if (!cell.IsUnderWater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed, indices);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed, indices);
}
}
/* Creates the 6 triangles that comprise a hex cell */
void TriangulateCell(HexCell cell)
{
for (HexDirection d = HexDirection.NE; d <= HexDirection.NW; d++)
{
if (cell.isHole)
{
TriangulateHoleWall(d, cell);
}
else
{
TriangulateWedge(d, cell);
}
if (CheckCellValid(cell.GetNeighbor(d)))
{
TriangulateEdge(d, cell);
}
/*** if corner cell, create the long walls of arena ***/
// this check only passes for corner cells
if (!CheckCellValid(cell.GetNeighbor(d)) &&
!CheckCellValid(cell.GetNeighbor(d.Next())) &&
!CheckCellValid(cell.GetNeighbor(d.Next2())))
{
TriangulateOuterWallPanel(d, cell);
TriangulateOuterWallPanel(d.Next(), cell);
TriangulateOuterWallPanel(d.Next2(), cell);
TriangulateWallStrip(d, cell);
}
/**** Alt Method - creates honeycomb walls - pretty but makes for bad gameplay
* HexCell n = cell.GetNeighbor(d);
* if(CheckCellValid(n)){
* TriangulateEdge(d, cell);
* }
* else{
* TriangulateOuterWallPanel(d, cell);
* HexCell n2 = cell.GetNeighbor(d.Next());
* if(CheckCellValid(n2)){
* TriangulateOuterWallPanelCorner(d, cell, n2);
* }
* }
*/
}
}
bool CanAddBridge(HexCell cell, HexDirection dir)
{
if (cell.incomingRiver != dir.Next())
{
return(false);
}
return(cell.HasRoadThroughEdge(dir.Next2()) || cell.HasRoadThroughEdge(dir.Opposite()));
}
void TriangulateWithRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center +
HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center +
HexMetrics.GetSolidEdgeMiddle(direction.Next()) *
(0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center +
HexMetrics.GetSolidEdgeMiddle(direction.Previous()) *
(0.5f * HexMetrics.innerToOuter);
centerR = center;
}
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),
1f / 6f
);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, cell.Color, e, cell.Color);
AddTriangle(centerL, m.v1, m.v2);
AddTriangleColor(cell.Color);
AddQuad(centerL, center, m.v2, m.v3);
AddQuadColor(cell.Color);
AddQuad(center, centerR, m.v3, m.v4);
AddQuadColor(cell.Color);
AddTriangle(centerR, m.v4, m.v5);
AddTriangleColor(cell.Color);
}
private void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 centre, EdgeVertices e)
{
Vector3 centreL, centreR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centreL = centre + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centreR = centre + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centreL = centre;
centreR = Vector3.Lerp(centre, e.v5, 2f / 3);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centreL = Vector3.Lerp(centre, e.v1, 2f / 3);
centreR = centre;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centreL = centre;
centreR = centre + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * 0.5f * HexMetrics.InnerToOuter;
}
else
{
centreL = centre + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * 0.5f * HexMetrics.InnerToOuter;
centreR = centre;
}
centre = Vector3.Lerp(centreL, centreR, 0.5f); // aligns edges
var m = new EdgeVertices(
Vector3.Lerp(centreL, e.v1, 0.5f),
Vector3.Lerp(centreR, e.v5, 0.5f),
1f / 6);
m.v3.y = centre.y = e.v3.y;
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
Terrain.AddTriangle(centreL, m.v1, m.v2);
Terrain.AddQuad(centreL, centre, m.v2, m.v3);
Terrain.AddQuad(centre, centreR, m.v3, m.v4);
Terrain.AddTriangle(centreR, m.v4, m.v5);
var indices = new Vector3(cell.Index, cell.Index, cell.Index);
Terrain.AddTriangleCellData(indices, weights1);
Terrain.AddQuadCellData(indices, weights1);
Terrain.AddQuadCellData(indices, weights1);
Terrain.AddTriangleCellData(indices, weights1);
var reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centreL, centreR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed, indices);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed, indices);
}
public void TriangulateContoursBetween(
IHexCell center, IHexCell right, HexDirection direction, Color centerWeights, Color rightWeights, IHexMesh mesh
)
{
var centerRightContour = CellContourCanon.GetContourForCellEdge(center, direction);
var rightCenterContour = CellContourCanon.GetContourForCellEdge(right, direction.Opposite());
int centerRightIndex = 1, rightCenterIndex = rightCenterContour.Count - 1;
while (centerRightIndex < centerRightContour.Count && rightCenterIndex > 0)
{
mesh.AddQuad(
centerRightContour[centerRightIndex - 1].ToXYZ(), centerRightContour[centerRightIndex].ToXYZ(),
rightCenterContour[rightCenterIndex].ToXYZ(), rightCenterContour[rightCenterIndex - 1].ToXYZ()
);
mesh.AddQuadColor(centerWeights, rightWeights);
centerRightIndex++;
rightCenterIndex--;
}
for (; centerRightIndex < centerRightContour.Count; centerRightIndex++)
{
mesh.AddTriangle(
centerRightContour[centerRightIndex - 1].ToXYZ(), rightCenterContour[0].ToXYZ(), centerRightContour[centerRightIndex].ToXYZ()
);
mesh.AddTriangleColor(centerWeights, rightWeights, centerWeights);
}
for (; rightCenterIndex > 0; rightCenterIndex--)
{
mesh.AddTriangle(
centerRightContour.Last().ToXYZ(), rightCenterContour[rightCenterIndex].ToXYZ(), rightCenterContour[rightCenterIndex - 1].ToXYZ()
);
mesh.AddTriangleColor(centerWeights, rightWeights, rightWeights);
}
if (RiverCanon.HasRiverAlongEdge(right, direction.Next2()))
{
var nextRight = Grid.GetNeighbor(center, direction.Next());
var rightNextRightContour = CellContourCanon.GetContourForCellEdge(right, direction.Next2());
var nextRightRightContour = CellContourCanon.GetContourForCellEdge(nextRight, direction.Previous());
mesh.AddTriangle(
centerRightContour.Last().ToXYZ(),
rightNextRightContour.Last().ToXYZ(),
nextRightRightContour.First().ToXYZ()
);
mesh.AddTriangleColor(centerWeights, rightWeights, rightWeights);
}
}
private HexDirection GetBestDirection(HexDirection startDirection, List <HexDirection> otherDirections, HexHash hash)
{
if (otherDirections.Contains(startDirection.Opposite()))
{
return(startDirection.Opposite());
}
else if (otherDirections.Contains(startDirection.Next2()))
{
return(startDirection.Next2());
}
else if (otherDirections.Contains(startDirection.Previous2()))
{
return(startDirection.Previous2());
}
else
{
return(otherDirections[Mathf.FloorToInt(hash.A * otherDirections.Count)]);
}
}
//The fact that we're building sections only from the NE, E, and SE
//cell edges is very important. A lot of the code here is structured
//as it is to deal with this reality.
public void RefreshRiverSections()
{
sections.Clear();
SectionBetweenCells.Clear();
CellEdgeContourCanon.Clear();
foreach (var cell in Grid.Cells)
{
for (HexDirection direction = HexDirection.NE; direction <= HexDirection.SE; direction++)
{
if (RiverCanon.HasRiverAlongEdge(cell, direction))
{
var neighbor = Grid.GetNeighbor(cell, direction);
Vector3 start = cell.AbsolutePosition + RenderConfig.GetFirstCorner(direction);
Vector3 end = cell.AbsolutePosition + RenderConfig.GetSecondCorner(direction);
RiverFlow flow = RiverCanon.GetFlowOfRiverAtEdge(cell, direction);
//Our control points need to operate differently if we're at endpoints,
//and both ControlOne and ControlTwo might have alternate behavior.
//We need to check both ends of the section for endpoints
bool previousCellRiver = RiverCanon.HasRiverAlongEdge(cell, direction.Previous());
bool previousNeighborRiver = RiverCanon.HasRiverAlongEdge(neighbor, direction.Previous2());
bool hasPreviousEndpoint =
!previousCellRiver &&
!previousNeighborRiver;
bool hasNextEndpoint =
!RiverCanon.HasRiverAlongEdge(cell, direction.Next()) &&
!RiverCanon.HasRiverAlongEdge(neighbor, direction.Next2());
var newRiverSection = new RiverSection()
{
AdjacentCellOne = cell,
AdjacentCellTwo = neighbor,
DirectionFromOne = direction,
Start = start,
End = end,
FlowFromOne = flow,
HasPreviousEndpoint = hasPreviousEndpoint,
HasNextEndpoint = hasNextEndpoint
};
SectionBetweenCells[new Tuple <IHexCell, IHexCell>(cell, neighbor)] = newRiverSection;
sections.Add(newRiverSection);
}
}
}
}
private void TriangulateWaterCorner(
IHexCell center, Vector3 localCenterPos, Color centerColor,
IHexCell right, Vector3 localRightPos, Color rightColor,
IHexCell left, Vector3 localLeftPos, Color leftColor,
HexDirection direction, IHexMesh mesh
)
{
mesh.AddTriangle(
localCenterPos + RenderConfig.GetFirstSolidCorner(direction),
localLeftPos + RenderConfig.GetFirstSolidCorner(direction.Next2()),
localRightPos + RenderConfig.GetFirstSolidCorner(direction.Previous2())
);
mesh.AddTriangleColor(centerColor, leftColor, rightColor);
}
//We need to draw a river from previousCell to nextCell by adding rivers
//to the edges of currentCell. PreviousCell is in directionToNext.Next2(),
//and should have some river pointing at currentCell
private RiverPathResults CreateRiverAlongCell_GentleCWTurn(
IHexCell previousCell, IHexCell currentCell, IHexCell nextCell,
HexDirection directionToPrevious, HexDirection directionToNext,
IEnumerable <IHexCell> oceanCells, HashSet <IHexCell> cellsAdjacentToRiver
)
{
var leftLeftPath = new RiverPath(
currentCell, directionToPrevious.Next(), directionToNext.Previous(),
RiverFlow.Clockwise, RiverCanon, Grid
);
var leftRightPath = new RiverPath(
currentCell, directionToPrevious, directionToNext.Next(),
RiverFlow.Counterclockwise, RiverCanon, Grid
);
var rightRightPath = new RiverPath(
currentCell, directionToNext.Next(),
RiverFlow.Counterclockwise, RiverCanon, Grid
);
var rightleftPath = new RiverPath(
currentCell, directionToPrevious, directionToNext.Previous(),
RiverFlow.Clockwise, RiverCanon, Grid
);
var pathsToTry = new List <RiverPath>();
//If directionToNext.Previous() is considered up,
//this case triggers when previousCell has a river
//along its upper-left edge.
if (RiverCanon.HasRiverAlongEdge(previousCell, directionToPrevious.Next2()))
{
pathsToTry.Add(leftLeftPath);
pathsToTry.Add(leftRightPath);
}
//If directionToNext.Previous() is considered up,
//this case triggers when previousCell has a river
//along its upper-right edge.
if (RiverCanon.HasRiverAlongEdge(previousCell, directionToPrevious.Previous2()))
{
pathsToTry.Add(rightRightPath);
pathsToTry.Add(rightleftPath);
}
return(TryFollowSomePath(pathsToTry, oceanCells, cellsAdjacentToRiver));
}
void TriangulateAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) *
(HexMetrics.innerToOuter * 0.5f);
}
else if (
cell.HasRiverThroughEdge(direction.Previous2())
)
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (
cell.HasRiverThroughEdge(direction.Previous()) &&
cell.HasRiverThroughEdge(direction.Next2())
)
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f)
);
TriangulateEdgeStrip(
m, weights1, cell.Index,
e, weights1, cell.Index
);
TriangulateEdgeFan(center, m, cell.Index);
//спавн объектов игрового окружения в каждом из 6 треугольников если нет рек и дорог
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f));
}
}
//We need to draw a river from previousCell to nextCell by adding rivers
//to the edges of currentCell. PreviousCell and nextCell are across from
//each-other. Previous river should have some river pointing at currentCell
private RiverPathResults CreateRiverAlongCell_StraightAcross(
IHexCell previousCell, IHexCell currentCell, IHexCell nextCell,
HexDirection directionToPrevious, HexDirection directionToNext,
IEnumerable <IHexCell> oceanCells, HashSet <IHexCell> cellsAdjacentToRiver
)
{
var leftToLeftPath = new RiverPath(
currentCell, directionToNext.Previous2(), directionToNext.Previous(),
RiverFlow.Clockwise, RiverCanon, Grid
);
var leftToRightPath = new RiverPath(
currentCell, directionToPrevious, directionToNext.Next(),
RiverFlow.Counterclockwise, RiverCanon, Grid
);
var rightToRightPath = new RiverPath(
currentCell, directionToNext.Next2(), directionToNext.Next(),
RiverFlow.Counterclockwise, RiverCanon, Grid
);
var rightToLeftPath = new RiverPath(
currentCell, directionToPrevious, directionToNext.Previous(),
RiverFlow.Clockwise, RiverCanon, Grid
);
var pathsToTry = new List <RiverPath>();
//If nextCell is above us, this case happens when previousCell has a
//river along its left edge
if (RiverCanon.HasRiverAlongEdge(previousCell, directionToNext.Previous()))
{
pathsToTry.Add(leftToLeftPath);
pathsToTry.Add(leftToRightPath);
//If nextCell is above us, this case happens when previousCell has a
//river along its right edge
}
else if (RiverCanon.HasRiverAlongEdge(previousCell, directionToNext.Next()))
{
pathsToTry.Add(rightToRightPath);
pathsToTry.Add(rightToLeftPath);
}
return(TryFollowSomePath(pathsToTry, oceanCells, cellsAdjacentToRiver));
}
public void updateChunkWithRiversAndRoads1Test()
{
GameObject obj = MonoBehaviour.Instantiate(Resources.Load <GameObject>("Prefabs/Hex Grid"));
HexGrid grid = obj.GetComponent <HexGrid>();
HexGridChunk[] chunks = grid.getHexGridChunks();
HexCell[] cells = chunks[0].getCells();
HexDirection direction = HexDirection.NE;
int index = 7;
// ....................................................
// SET DIRECT RIVER
// ....................................................
// Find cell with next steps: go to NE, go to NE
HexCell cell = cells[index].GetNeighbor(direction)
.GetNeighbor(direction);
// Set river to NW direction
cell.SetOutgoingRiver(direction.Previous());
// Get neigbor from SE direction cell
HexCell neighbor = cell.GetNeighbor(direction.Next2());
// Set river to NW direction
neighbor.SetOutgoingRiver(direction.Previous());
// Set road to previous 2 direction
cell.AddRoad(direction.Next());
// Set road to opposite direction
cell.AddRoad(direction.Next().Opposite());
// ....................................................
// Update chunk
foreach (HexGridChunk chunk in chunks)
{
chunk.Triangulate();
}
Assert.IsTrue(cell.HasIncomingRiver);
Assert.IsTrue(cell.HasOutgoingRiver);
Assert.IsTrue(cell.HasRoads);
GameObject.Destroy(obj);
}
private void TriangulateAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
// Check whether we are on the inside of a curve. This occurs when
// both the previous and next direction contai a river. In this case teh center
// will be moved towards the edge.
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction)
* (HexMetrics.innerToOuter * 0.5f);
// Check whether this is a straight river, in that case move the center
// towards the first corner.
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (
cell.HasRiverThroughEdge(direction.Previous()) &&
cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(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);
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
features.AddFeature((center + e.v1 + e.v5) * (1f / 3f));
}
}
public T GetMixForNextCornerAtPoint <T>(
IHexCell center, IHexCell right, IHexCell nextRight, HexDirection direction, Vector3 point,
DataSelectorCallback <T> dataSelector, Func <T, T, T> aggregator
)
{
Vector2 centerCorner = center.AbsolutePositionXZ + RenderConfig.GetSecondSolidCornerXZ(direction);
Vector2 rightCorner = right.AbsolutePositionXZ + RenderConfig.GetSecondSolidCornerXZ(direction.Next2());
Vector2 nextRightCorner = nextRight.AbsolutePositionXZ + RenderConfig.GetSecondSolidCornerXZ(direction.Previous2());
float percentCenter, percentRight, percentNextRight;
Geometry2D.GetBarycentric2D(
new Vector2(point.x, point.z), centerCorner, rightCorner, nextRightCorner,
out percentCenter, out percentRight, out percentNextRight
);
T centerContribution = dataSelector(point, center, direction, percentCenter);
T rightContribution = dataSelector(point, right, direction.Next2(), percentRight);
T nextRightContribution = dataSelector(point, nextRight, direction.Previous2(), percentNextRight);
return(aggregator(aggregator(centerContribution, rightContribution), nextRightContribution));
}
void TriangulateAdjacentToRiver(HexDirection dir, HexCell cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(dir, cell, center, e);
}
if (cell.HasRiverThroughEdge(dir.Next()))
{
if (cell.HasRiverThroughEdge(dir.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(dir)
* (HexMetrics.innerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(dir.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(dir) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(dir.Previous()) &&
cell.HasRiverThroughEdge(dir.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(dir) * 0.25f;
}
var m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f));
TriangulateEdgeStrip(m, color1, cell.terrainTypeIndex, e, color1, cell.terrainTypeIndex);
TriangulateEdgeFan(center, m, cell.terrainTypeIndex);
if (CanAddFeature(cell, dir))
{
// offset the feature slightly from the center towards
// the directional edge.
var pos = (center + e.v1 + e.v5) * (1f / 3f);
features.AddFeature(cell, pos);
}
}
//We need to draw a river from previousCell to nextCell by adding rivers
//to the edges of currentCell. PreviousCell is in directionToNext.Next(),
//and should have some river pointing at currentCell
private RiverPathResults CreateRiverAlongCell_SharpCWTurn(
IHexCell previousCell, IHexCell currentCell, IHexCell nextCell,
HexDirection directionToPrevious, HexDirection directionToNext,
IEnumerable <IHexCell> oceanCells, HashSet <IHexCell> cellsAdjacentToRiver
)
{
var leftToLeftPath = new RiverPath(
currentCell, directionToPrevious.Next(), directionToNext.Previous(),
RiverFlow.Clockwise, RiverCanon, Grid
);
var leftToRightPath = new RiverPath(
currentCell, directionToPrevious, RiverFlow.Counterclockwise,
RiverCanon, Grid
);
var pathsToTry = new List <RiverPath>();
//Assuming directionToPrevious.Opposite() is up,
//this case triggers when previousCell has a
//river along its upper left edge
if (RiverCanon.HasRiverAlongEdge(previousCell, directionToPrevious.Next2()))
{
pathsToTry.Add(leftToLeftPath);
pathsToTry.Add(leftToRightPath);
}
//Assuming directionToPrevious.Opposite() is up,
//this case triggers when previousCell has a
//river along its upper right edge
if (RiverCanon.HasRiverAlongEdge(previousCell, directionToPrevious.Previous2()))
{
return(RiverPathResults.Success);
}
return(TryFollowSomePath(pathsToTry, oceanCells, cellsAdjacentToRiver));
}
void TriangulateRoadAdjacentToRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center;
if (cell.HasRiverBeginOrEnd)
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(
cell.RiverBeginOrEndDirection.Opposite()
) * (1f / 3f);
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite())
{
Vector3 corner;
if (previousHasRiver)
{
if (
!hasRoadThroughEdge &&
!cell.HasRoadThroughEdge(direction.Next())
)
{
return;
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
if (
!hasRoadThroughEdge &&
!cell.HasRoadThroughEdge(direction.Previous())
)
{
return;
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
if (cell.IncomingRiver == direction.Next() && (
cell.HasRoadThroughEdge(direction.Next2()) ||
cell.HasRoadThroughEdge(direction.Opposite())
))
{
features.AddBridge(roadCenter, center - corner * 0.5f);
}
center += corner * 0.25f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous())
{
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next())
{
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
}
else if (previousHasRiver && nextHasRiver)
{
if (!hasRoadThroughEdge)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) *
HexMetrics.innerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
else
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
if (
!cell.HasRoadThroughEdge(middle) &&
!cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next())
)
{
return;
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle);
roadCenter += offset * 0.25f;
if (
direction == middle &&
cell.HasRoadThroughEdge(direction.Opposite())
)
{
features.AddBridge(
roadCenter,
center - offset * (HexMetrics.innerToOuter * 0.7f)
);
}
}
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge, cell.Index);
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL, cell.Index);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center, cell.Index);
}
}
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
//outer walls
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center +
HexMetric.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetric.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
// sharp turns
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
// two way turns
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetric.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetric.innerToOuter);
}
else
{
centerL = center + HexMetric.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetric.innerToOuter);
centerR = center;
}
//mid point of channel
EdgeVertices m = new EdgeVertices(Vector3.Lerp(centerL, e.v1, 0.5f), Vector3.Lerp(centerR, e.v5, 0.5f), 1f / 6f);
m.v3.y = center.y = e.v3.y;
//fill area
TriangulateEdgeStrip(m, color1, cell.TerrainTypeIndex, e, color1, cell.TerrainTypeIndex);
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
terrain.AddTriangleColor(color1);
terrain.AddQuadColor(color1);
terrain.AddQuadColor(color1);
terrain.AddTriangleColor(color1);
Vector3 types;
types.x = types.y = types.z = cell.TerrainTypeIndex;
terrain.AddTriangleTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddTriangleTerrainTypes(types);
//river water quads
if (!cell.IsUnderwater)
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed);
}
}
int CreateRiver(HexCell origin)
{
int length = 1;
HexCell cell = origin;
HexDirection direction = HexDirection.NE;
while (!cell.IsUnderwater)
{
int minNeighborElevation = int.MaxValue;
flowDirections.Clear();
for (HexDirection d = HexDirection.NE; d <= HexDirection.NW; d++)
{
HexCell neighbor = cell.GetNeighbor(d);
if (!neighbor)
{
continue;
}
if (neighbor.Elevation < minNeighborElevation)
{
minNeighborElevation = neighbor.Elevation;
}
if (neighbor == origin || neighbor.HasIncomingRiver)
{
continue;
}
int delta = neighbor.Elevation - cell.Elevation;
if (delta > 0)
{
continue;
}
if (neighbor.HasOutgoingRiver)
{
cell.SetOutgoingRiver(d);
return(length);
}
if (delta < 0)
{
flowDirections.Add(d);
flowDirections.Add(d);
flowDirections.Add(d);
}
if (
length == 1 ||
(d != direction.Next2() && d != direction.Previous2())
)
{
flowDirections.Add(d);
}
flowDirections.Add(d);
}
if (flowDirections.Count == 0)
{
if (length == 1)
{
return(0);
}
if (minNeighborElevation >= cell.Elevation)
{
cell.WaterLevel = minNeighborElevation;
if (minNeighborElevation == cell.Elevation)
{
cell.Elevation = minNeighborElevation - 1;
}
}
break;
}
direction = flowDirections[Random.Range(0, flowDirections.Count)];
cell.SetOutgoingRiver(direction);
length += 1;
if (
minNeighborElevation >= cell.Elevation &&
Random.value < extraLakeProbability
)
{
cell.WaterLevel = cell.Elevation;
cell.Elevation -= 1;
}
cell = cell.GetNeighbor(direction);
}
return(length);
}
/// <summary>
/// Creates road geometry when there is a river in the cell.
/// </summary>
void TriangulateRoadAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
bool hasRoadThroughEdge = cell.HasRoadThroughEdge(direction);
bool previousHasRiver = cell.HasRiverThroughEdge(direction.Previous());
bool nextHasRiver = cell.HasRiverThroughEdge(direction.Next());
Vector2 interpolators = GetRoadInterpolators(direction, cell);
Vector3 roadCenter = center;
// When there is a river start/end or a river zig-zag then we only need to offset road center
// If there is a straight section of river cutting through or a smooth turn then those divide the road network
if (cell.HasRiverBeginOrEnd) // If this is river start or river end
{
roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f);
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite()) // If this is a river section cutting cell in the middle
{
Vector3 corner;
if (previousHasRiver)
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next()))
{
return; // Dont draw on the other side of the river
}
corner = HexMetrics.GetSecondSolidCorner(direction);
}
else
{
if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous()))
{
return; // Dont draw on the other side of the river
}
corner = HexMetrics.GetFirstSolidCorner(direction);
}
roadCenter += corner * 0.5f;
// Prevent duplicate bridges and add a bridge if road on both sides
if (cell.IncomingRiver == direction.Next() && (
cell.HasRoadThroughEdge(direction.Next2()) ||
cell.HasRoadThroughEdge(direction.Opposite())
))
{
Features.AddBridge(roadCenter, center - corner * 0.5f);
}
center += corner * 0.25f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Previous()) // Check if zig-zag and offset
{
roadCenter -= HexMetrics.GetSecondCorner(cell.IncomingRiver) * 0.2f;
}
else if (cell.IncomingRiver == cell.OutgoingRiver.Next()) // Check if zig-zag and offset
{
roadCenter -= HexMetrics.GetFirstCorner(cell.IncomingRiver) * 0.2f;
}
else if (previousHasRiver && nextHasRiver) // Check smooth curve (inside of the curve)
{
if (!hasRoadThroughEdge)
{
return; // Dont draw on the other side of the river
}
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.InnerToOuter;
roadCenter += offset * 0.7f;
center += offset * 0.5f;
}
else // Smooth curve (outside of the curve)
{
HexDirection middle;
if (previousHasRiver)
{
middle = direction.Next();
}
else if (nextHasRiver)
{
middle = direction.Previous();
}
else
{
middle = direction;
}
if (!cell.HasRoadThroughEdge(middle) && !cell.HasRoadThroughEdge(middle.Previous()) &&
!cell.HasRoadThroughEdge(middle.Next()))
{
return; // Dont draw on the other side of the river
}
// Set center and add bridge
Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle);
roadCenter += offset * 0.25f;
// Prevent duplicate bridges and road on both sides
if (direction == middle && cell.HasRoadThroughEdge(direction.Opposite()))
{
Features.AddBridge(roadCenter, center - offset * (HexMetrics.InnerToOuter * 0.7f));
}
}
Vector3 mL = Vector3.Lerp(roadCenter, e.v1, interpolators.x);
Vector3 mR = Vector3.Lerp(roadCenter, e.v5, interpolators.y);
TriangulateRoad(roadCenter, mL, mR, e, hasRoadThroughEdge, cell.Index);
// Create auxiliary geometry
if (previousHasRiver)
{
TriangulateRoadEdge(roadCenter, center, mL, cell.Index);
}
if (nextHasRiver)
{
TriangulateRoadEdge(roadCenter, mR, center, cell.Index);
}
}
/// <summary>
/// Creates the triangles for a side of the hexagon, when there is a river in the hex.
/// </summary>
void TriangulateAdjacentToRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
if (cell.HasRoads)
{
TriangulateRoadAdjacentToRiver(direction, cell, center, e);
}
// Determine center by finding river channel center edge
if (cell.HasRiverThroughEdge(direction.Next()))
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
center += HexMetrics.GetSolidEdgeMiddle(direction) * (HexMetrics.InnerToOuter * 0.5f);
}
else if (cell.HasRiverThroughEdge(direction.Previous2()))
{
center += HexMetrics.GetFirstSolidCorner(direction) * 0.25f;
}
}
else if (cell.HasRiverThroughEdge(direction.Previous()) && cell.HasRiverThroughEdge(direction.Next2()))
{
center += HexMetrics.GetSecondSolidCorner(direction) * 0.25f;
}
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(center, e.v1, 0.5f),
Vector3.Lerp(center, e.v5, 0.5f)
);
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
TriangulateEdgeFan(center, m, cell.Index);
// If possible add any features
if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction))
{
Features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f));
}
}
/// <summary>
/// Creates the triangles for a side of the hexagon, with river passing through (incoming and outgoing river) at this side.
/// </summary>
void TriangulateWithRiver(HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite())) // If river flows forward through the cell
// Extend center into line
{
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next())) // If river bends sharply in next dir
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous())) // If river bends sharply in prev dir
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2())) // River bends smoothly to next.next dir
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next()) * (0.5f * HexMetrics.InnerToOuter);
}
else // River bends smoothly to previous.previous dir
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous()) * (0.5f * HexMetrics.InnerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f); // Average center to serve all cases
// Edge 1/2 the way from edge and cell center
EdgeVertices m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f
);
m.v3.y = center.y = e.v3.y; // Lower middle edge and center to river bed
TriangulateEdgeStrip(m, weights1, cell.Index, e, weights1, cell.Index);
// Final gap between the middle edge and the center
// Geo
Terrain.AddTriangle(centerL, m.v1, m.v2);
Terrain.AddQuad(centerL, center, m.v2, m.v3);
Terrain.AddQuad(center, centerR, m.v3, m.v4);
Terrain.AddTriangle(centerR, m.v4, m.v5);
// Splat + Terrain Types
Vector3 indices;
indices.x = indices.y = indices.z = cell.Index;
Terrain.AddTriangleCellData(indices, weights1);
Terrain.AddQuadCellData(indices, weights1);
Terrain.AddQuadCellData(indices, weights1);
Terrain.AddTriangleCellData(indices, weights1);
if (!cell.IsUnderwater) // No river water surface when underwater, river bed allowed
// River water surface
{
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed, indices);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed, indices);
}
}
/// <summary>
/// Creates the segments of the river flowing through multiple cells. There are some specifications to creating a river:
/// - The cell a river is joined onto must be level or a lower elevation
/// - River cannot loop onto itself.
/// - River will priorities cells that aren't directly next to itself (Harsh turns on the river)
/// - If it runs into another river origin then it will join the two rivers together.
/// - If the surrounding cells of the river end are higher than the current, it will create lake
/// - There is a random chance of lakes being created along the river if the cell is of lower elevation
/// </summary>
/// <param name="origin"> Origin cell of river </param>
/// <returns> Amount of cells used in river creation </returns>
int CreateRiver(HexCell origin)
{
int length = 1;
HexCell cell = origin;
HexDirection direction = HexDirection.NE;
while (!cell.isUnderwater)
{
int minNeighborElevation = int.MaxValue;
flowDirections.Clear();
for (HexDirection d = HexDirection.NE; d <= HexDirection.NW; d++)
{
HexCell neighbor = cell.GetNeighbor(d);
if (!neighbor)
{
continue;
}
if (neighbor.Elevation < minNeighborElevation)
{
minNeighborElevation = neighbor.Elevation;
}
if (neighbor == origin || neighbor.HasIncomingRiver)
{
continue;
}
int delta = neighbor.Elevation - cell.Elevation;
if (delta > 0)
{
continue;
}
if (delta < 0) //Increases chance of river choosing a cell which goes downhill
{
flowDirections.Add(d);
flowDirections.Add(d);
flowDirections.Add(d);
}
if (length == 1 || (d != direction.Next2() && d != direction.Previous2())) //Increases chance of river choosing cell that has a gentler turn
{
flowDirections.Add(d);
}
if (neighbor.HasOutgoingRiver) // If river runs into another origin river, join the rivers together. Early Return
{
cell.SetOutgoingRiver(d);
return(length);
}
flowDirections.Add(d);
}
if (flowDirections.Count == 0)
{
if (length == 1)
{
return(0);
}
if (minNeighborElevation >= cell.Elevation)
{
cell.WaterLevel = minNeighborElevation;
if (minNeighborElevation == cell.Elevation)
{
cell.Elevation = minNeighborElevation - 1;
}
}
break;
}
direction = flowDirections[Random.Range(0, flowDirections.Count)];
cell.SetOutgoingRiver(direction);
length += 1;
if (minNeighborElevation >= cell.Elevation && Random.value < extraLakeProbabiliity)
{
cell.WaterLevel = cell.Elevation;
cell.Elevation -= 1;
}
cell = cell.GetNeighbor(direction);
}
return(length);
}
void TriangulateWithRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center + HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center + HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center + HexMetrics.GetSolidEdgeMiddle(direction.Next())
* (0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center + HexMetrics.GetSolidEdgeMiddle(direction.Previous())
* (0.5f * HexMetrics.innerToOuter);
centerR = center;
}
center = Vector3.Lerp(centerL, centerR, 0.5f);
var m = new EdgeVertices(
Vector3.Lerp(centerL, e.v1, 0.5f),
Vector3.Lerp(centerR, e.v5, 0.5f),
1f / 6f);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, color1, cell.terrainTypeIndex, e, color1, cell.terrainTypeIndex);
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);
terrain.AddTriangleColor(color1);
terrain.AddQuadColor(color1);
terrain.AddQuadColor(color1);
terrain.AddTriangleColor(color1);
var types = Vector3.one * cell.terrainTypeIndex;
terrain.AddTriangleTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddTriangleTerrainTypes(types);
if (!cell.isUnderWater)
{
var reversed = cell.incomingRiver == direction;
TriangulateRiverQuad(centerL, centerR, m.v2, m.v4, cell.riverSurfaceY, 0.4f, reversed);
TriangulateRiverQuad(m.v2, m.v4, e.v2, e.v4, cell.riverSurfaceY, 0.6f, reversed);
}
}
void TriangulateWithRiver(
HexDirection direction, HexCell cell, Vector3 center, EdgeVertices e
)
{
Vector3 centerL, centerR;
if (cell.HasRiverThroughEdge(direction.Opposite()))
{
centerL = center +
HexMetrics.GetFirstSolidCorner(direction.Previous()) * 0.25f;
centerR = center +
HexMetrics.GetSecondSolidCorner(direction.Next()) * 0.25f;
}
else if (cell.HasRiverThroughEdge(direction.Next()))
{
centerL = center;
centerR = Vector3.Lerp(center, e.v5, 2f / 3f);
}
else if (cell.HasRiverThroughEdge(direction.Previous()))
{
centerL = Vector3.Lerp(center, e.v1, 2f / 3f);
centerR = center;
}
else if (cell.HasRiverThroughEdge(direction.Next2()))
{
centerL = center;
centerR = center +
HexMetrics.GetSolidEdgeMiddle(direction.Next()) *
(0.5f * HexMetrics.innerToOuter);
}
else
{
centerL = center +
HexMetrics.GetSolidEdgeMiddle(direction.Previous()) *
(0.5f * HexMetrics.innerToOuter);
centerR = center;
}
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),
1f / 6f
);
m.v3.y = center.y = e.v3.y;
TriangulateEdgeStrip(m, color1, (int)cell.TerrainType, e, color1, (int)cell.TerrainType);
terrain.AddTriangle(centerL, m.v1, m.v2);
terrain.AddQuad(centerL, center, m.v2, m.v3);
terrain.AddQuad(center, centerR, m.v3, m.v4);
terrain.AddTriangle(centerR, m.v4, m.v5);
terrain.AddTriangleColor(color1);
terrain.AddQuadColor(color1);
terrain.AddQuadColor(color1);
terrain.AddTriangleColor(color1);
Vector3 types;
types.x = types.y = types.z = (float)cell.TerrainType;
terrain.AddTriangleTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddQuadTerrainTypes(types);
terrain.AddTriangleTerrainTypes(types);
bool reversed = cell.IncomingRiver == direction;
TriangulateRiverQuad(
centerL, centerR, m.v2, m.v4, cell.RiverSurfaceY, 0.4f, reversed
);
TriangulateRiverQuad(
m.v2, m.v4, e.v2, e.v4, cell.RiverSurfaceY, 0.6f, reversed
);
}