public void TriangulateAllCells()
{
// This method could be invoked at any time, even when cells have already been triangulated earlier.
// So we should begin by clearing the old data.
Terrain.Clear();
Rivers.Clear();
Roads.Clear();
Water.Clear();
WaterShore.Clear();
Estuaries.Clear();
Features.Clear();
for (int i = 0; i < _cells.Length; i++)
{
Precalculation(_cells[i]);
}
for (int i = 0; i < _cells.Length; i++)
{
TriangulateCell(_cells[i]);
AddFeatures(_cells[i]);
}
Terrain.Apply();
Rivers.Apply();
Roads.Apply();
Water.Apply();
WaterShore.Apply();
Estuaries.Apply();
Features.Apply();
}
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));
}
}
private void TriangulateEstuary(EdgeVertices e1, EdgeVertices e2, bool incomingRiver, Vector3 indices)
{
WaterShore.AddTriangle(e2.v1, e1.v2, e1.v1);
WaterShore.AddTriangle(e2.v5, e1.v5, e1.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)
);
WaterShore.AddTriangleCellData(indices, weights2, weights1, weights1);
WaterShore.AddTriangleCellData(indices, weights2, weights1, weights1);
Estuaries.AddQuad(e2.v1, e1.v2, e2.v2, e1.v3);
Estuaries.AddTriangle(e1.v3, e2.v2, e2.v4);
Estuaries.AddQuad(e1.v3, e1.v4, e2.v4, e2.v5);
Estuaries.AddQuadUV(
new Vector2(0f, 1f), new Vector2(0f, 0f),
new Vector2(1f, 1f), new Vector2(0f, 0f));
Estuaries.AddTriangleUV(
new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(1f, 1f));
Estuaries.AddQuadUV(
new Vector2(0f, 0f), new Vector2(0f, 0f),
new Vector2(1f, 1f), new Vector2(0f, 1f));
Estuaries.AddQuadCellData(indices, weights2, weights1, weights2, weights1);
Estuaries.AddTriangleCellData(indices, weights1, weights2, weights2);
Estuaries.AddQuadCellData(indices, weights1, weights2);
if (incomingRiver)
{
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
{
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));
}
}
/// <summary>
/// Creates the estuary (when river meets shore) geometry.
/// </summary>
void TriangulateEstuary(EdgeVertices e1, EdgeVertices e2, bool incomingRiver, Vector3 indices)
{
// Some of the estuary is still water shore, namely one triangle on each side
// that leaves the estuary itself with a trapezoid shape connecting the shore/river to water
WaterShore.AddTriangle(e2.v1, e1.v2, e1.v1);
WaterShore.AddTriangle(e2.v5, e1.v5, e1.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));
WaterShore.AddTriangleCellData(indices, weights2, weights1, weights1);
WaterShore.AddTriangleCellData(indices, weights2, weights1, weights1);
// Make the estuary trapezoid
Estuaries.AddQuad(e2.v1, e1.v2, e2.v2, e1.v3); // Adding it rotated for symetric geometry
Estuaries.AddTriangle(e1.v3, e2.v2, e2.v4);
Estuaries.AddQuad(e1.v3, e1.v4, e2.v4, e2.v5);
// For shore effect
Estuaries.AddQuadUV(
new Vector2(0f, 1f), new Vector2(0f, 0f),
new Vector2(1f, 1f), new Vector2(0f, 0f)
);
Estuaries.AddTriangleUV(
new Vector2(0f, 0f), new Vector2(1f, 1f), new Vector2(1f, 1f)
);
Estuaries.AddQuadUV(
new Vector2(0f, 0f), new Vector2(0f, 0f),
new Vector2(1f, 1f), new Vector2(0f, 1f)
);
Estuaries.AddQuadCellData(indices, weights2, weights1, weights2, weights1);
Estuaries.AddTriangleCellData(indices, weights1, weights2, weights2);
Estuaries.AddQuadCellData(indices, weights1, weights2);
// For river effect, depending on river flow direction UVs are different
// That is if river flows into the water or out of the water (e.g. when a river starts from a lake)
if (incomingRiver)
{
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
{
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));
}
}
/// <summary>
/// Builds the mesh of the hex grid out of the provided array of cells.
/// </summary>
public void Triangulate()
{
Terrain.Clear();
Rivers.Clear();
Roads.Clear();
Water.Clear();
WaterShore.Clear();
Estuaries.Clear();
Features.Clear();
for (int i = 0; i < Cells.Length; i++)
{
Triangulate(Cells[i]);
}
Terrain.Apply();
Rivers.Apply();
Roads.Apply();
Water.Apply();
WaterShore.Apply();
Estuaries.Apply();
Features.Apply();
}
public void Triangulate(HexCell[] cells)
{
Terrain.Clear();
Rivers.Clear();
Roads.Clear();
Water.Clear();
WaterShore.Clear();
Estuaries.Clear();
Features.Clear();
foreach (var cell in cells)
{
TriangulateCell(cell);
}
Terrain.Apply();
Rivers.Apply();
Roads.Apply();
Water.Apply();
WaterShore.Apply();
Estuaries.Apply();
Features.Apply();
}
