void TriangulateRoadCentre(SquareCell cell, Vector3 centre, Vector3 vs0, Vector3 vs1, Vector3 vs2, Vector3 vs3)
{
roads.AddTriangle(centre, vs0, GetMidVector(vs0, vs1));
roads.AddTriangle(centre, GetMidVector(vs0, vs1), vs1);
roads.AddTriangle(centre, vs1, GetMidVector(vs1, vs2));
roads.AddTriangle(centre, GetMidVector(vs1, vs2), vs2);
roads.AddTriangle(centre, vs2, GetMidVector(vs2, vs3));
roads.AddTriangle(centre, GetMidVector(vs2, vs3), vs3);
roads.AddTriangle(centre, vs3, GetMidVector(vs3, vs0));
roads.AddTriangle(centre, GetMidVector(vs3, vs0), vs0);
// W
float midU = cell.HasRoadThroughEdge(GridDirection.W) ? 1f : 0f;
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(0f, 1f), new Vector2(midU, 1f));
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(midU, 1f), new Vector2(0f, 1f));
// N
midU = cell.HasRoadThroughEdge(GridDirection.N) ? 1f : 0f;
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(0f, 1f), new Vector2(midU, 1f));
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(midU, 1f), new Vector2(0f, 1f));
// E
midU = cell.HasRoadThroughEdge(GridDirection.E) ? 1f : 0f;
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(0f, 1f), new Vector2(midU, 1f));
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(midU, 1f), new Vector2(0f, 1f));
// S
midU = cell.HasRoadThroughEdge(GridDirection.S) ? 1f : 0f;
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(0f, 1f), new Vector2(midU, 1f));
roads.AddTriangleUV(new Vector2(1f, 1f), new Vector2(midU, 1f), new Vector2(0f, 1f));
}
public void TrimLinksToRoadType()
{
List <Node> nodesToCull = new List <Node>();
for (int i = 0; i < 8; i += 2)
{
if (!parentCell.HasRoadThroughEdge((GridDirection)i))
{
nodesToCull.AddRange(nodes.FindAll(n => n.compassDirection == (GridDirection)i));
}
}
foreach (Node n in nodesToCull)
{
network.DeleteNode(n);
}
}
void AddHalfCell(SquareCell cell, GridDirection direction, Vector3 centre, Vector3 v0, Vector3 v1, Vector3 v2, Vector3 va, Vector3 vb, Vector3 vc, Vector3 vd, Vector3 vx, Vector3 vy, Vector3 vz)
{
Vector3 riverbed = centre + Vector3.up * (cell.CentreElevation + GridMetrics.streamBedElevationOffset) * GridMetrics.elevationStep;
Vector3 midSolidEdgePrev = centre + GridMetrics.GetSolidEdge(direction.Previous()) + Vector3.up * (cell.CentreElevation + GridMetrics.streamBedElevationOffset) * GridMetrics.elevationStep;
Vector3 midSolidEdgeNext = centre + GridMetrics.GetSolidEdge(direction.Next()) + Vector3.up * (cell.CentreElevation + GridMetrics.streamBedElevationOffset) * GridMetrics.elevationStep;
SquareCell neighborPrev = cell.GetNeighbor(direction.Previous()) ?? cell;
SquareCell neighborNext = cell.GetNeighbor(direction.Next()) ?? cell;
Vector3 midEdgePrev = centre + GridMetrics.GetEdge(direction.Previous()) + Vector3.up * ((cell.CentreElevation + neighborPrev.CentreElevation) / 2 + GridMetrics.streamBedElevationOffset) * GridMetrics.elevationStep;
Vector3 midEdgeNext = centre + GridMetrics.GetEdge(direction.Next()) + Vector3.up * ((cell.CentreElevation + neighborNext.CentreElevation) / 2 + GridMetrics.streamBedElevationOffset) * GridMetrics.elevationStep;
if (cell.HasRiver)
{
if (cell.HasRiverThroughEdge(direction.Previous()))
{
terrain.AddTriangle(v0, midSolidEdgePrev, riverbed); // split tri into two tris
terrain.AddTriangle(midSolidEdgePrev, v1, riverbed);
}
else
{
terrain.AddTriangle(v0, v1, riverbed);
} // edge with no river
if (cell.HasRiverThroughEdge(direction.Next()))
{
terrain.AddTriangle(v1, midSolidEdgeNext, riverbed); // split tri into two tris
terrain.AddTriangle(midSolidEdgeNext, v2, riverbed);
}
else
{
terrain.AddTriangle(v1, v2, riverbed);
} // edge with no river
}
else
{
terrain.AddTriangle(v0, v1, v2);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
terrain.AddQuad(v1, va, midEdgeNext, midSolidEdgeNext);
terrain.AddQuad(midSolidEdgeNext, midEdgeNext, vb, v2);
}
else
{
terrain.AddQuad(v1, va, vb, v2);
} // top Edge
if (cell.HasRiverThroughEdge(direction.Previous()))
{
terrain.AddQuad(v1, midSolidEdgePrev, midEdgePrev, vd);
terrain.AddQuad(midSolidEdgePrev, v0, vc, midEdgePrev);
}
else
{
terrain.AddQuad(v1, v0, vc, vd);
} // left Edge
if (cell.HasRiverThroughEdge(direction))
{
}
else
{
terrain.AddQuad(v1, vd, vx, va);
} // direction edge
if (cell.HasRiverThroughEdge(direction.Next2()))
{
}
else
{
terrain.AddQuad(v2, vb, vy, vz);
} // clockwise edge
AddColors(cell, direction);
if (cell.HasRoadThroughEdge(direction.Next()))
{
midEdgeNext = centre + GridMetrics.GetEdge(direction.Next()) + Vector3.up * ((int)cell.GridElevations[direction] + (int)cell.GridElevations[direction.Next2()]) / 2 * GridMetrics.elevationStep;
midSolidEdgeNext = centre + GridMetrics.GetSolidEdge(direction.Next()) + Vector3.up * ((int)cell.GridElevations[direction] + (int)cell.GridElevations[direction.Next2()]) / 2 * GridMetrics.elevationStep;
TriangulateRoadSegment(v1, midSolidEdgeNext, v2, va, midEdgeNext, vb);
}
if (cell.HasRoadThroughEdge(direction.Previous()))
{
midEdgePrev = centre + GridMetrics.GetEdge(direction.Previous()) + Vector3.up * ((int)cell.GridElevations[direction] + (int)cell.GridElevations[direction.Previous2()]) / 2 * GridMetrics.elevationStep;
midSolidEdgePrev = centre + GridMetrics.GetSolidEdge(direction.Previous()) + Vector3.up * ((int)cell.GridElevations[direction] + (int)cell.GridElevations[direction.Previous2()]) / 2 * GridMetrics.elevationStep;
TriangulateRoadSegment(v0, midSolidEdgePrev, v1, vc, midEdgePrev, vd);
}
}