private void Triangulate(HexDirection direction, HexCell cell) { Vector3 center = cell.Position; EdgeVertices e = new EdgeVertices( center + HexMetrics.GetFirstSolidCorner(direction), center + HexMetrics.GetSecondSolidCorner(direction) ); if (cell.HasRiver) { if (cell.HasRiverThroughEdge(direction)) { e.v3.y = cell.StreamBedY; if (cell.HasRiverBeginOrEnd) { TriangulateWithRiverBeginOrEnd(direction, cell, center, e); } else { TriangulateWithRiver(direction, cell, center, e); } } else { TriangulateAdjacentToRiver(direction, cell, center, e); } } else { TriangulateWithoutRiver(direction, cell, center, e); if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction)) { features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f)); } } if (direction <= HexDirection.SE) { TriangulateConnection(direction, cell, e); } if (cell.IsUnderwater) { TriangulateWater(direction, cell, center); } }
private 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); if (!cell.IsUnderwater && !cell.HasRoadThroughEdge(direction)) { features.AddFeature(cell, (center + e.v1 + e.v5) * (1f / 3f)); } }
void TriangulateWaterShore(HexDirection direction, HexCell cell, HexCell neighbor, Vector3 center) { // Triangulate as a fan EdgeVertices e1 = new EdgeVertices(center + HexMetrics.GetFirstWaterCorner(direction), center + HexMetrics.GetSecondWaterCorner(direction)); water.AddTriangle(center, e1.v1, e1.v2); water.AddTriangle(center, e1.v2, e1.v3); water.AddTriangle(center, e1.v3, e1.v4); water.AddTriangle(center, e1.v4, e1.v5); // Triangulate the strip Vector3 center2 = neighbor.Position; center2.y = center.y; EdgeVertices e2 = new EdgeVertices(center2 + HexMetrics.GetSecondSolidCorner(direction.Opposite()), center2 + HexMetrics.GetFirstSolidCorner(direction.Opposite())); if (cell.HasRiverThroughEdge(direction)) { TriangulateEstuary(e1, e2, cell.HasIncomingRiver && cell.IncomingRiver == direction); } else { waterShore.AddQuad(e1.v1, e1.v2, e2.v1, e2.v2); waterShore.AddQuad(e1.v2, e1.v3, e2.v2, e2.v3); waterShore.AddQuad(e1.v3, e1.v4, e2.v3, e2.v4); waterShore.AddQuad(e1.v4, e1.v5, e2.v4, e2.v5); waterShore.AddQuadUV(0f, 0f, 0f, 1f); waterShore.AddQuadUV(0f, 0f, 0f, 1f); waterShore.AddQuadUV(0f, 0f, 0f, 1f); waterShore.AddQuadUV(0f, 0f, 0f, 1f); } // Don't forget the corner triangle HexCell nextNeighbor = cell.GetNeighbor(direction.Next()); if (nextNeighbor != null) { Vector3 v3 = nextNeighbor.Position + (nextNeighbor.IsUnderwater ? HexMetrics.GetFirstWaterCorner(direction.Previous()) : HexMetrics.GetFirstSolidCorner(direction.Previous())); v3.y = center.y; waterShore.AddTriangle(e1.v5, e2.v5, v3); waterShore.AddTriangleUV(new Vector2(0f, 0f), new Vector2(0f, 1f), new Vector2(0f, nextNeighbor.IsUnderwater ? 0f : 1f)); } }
private 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 ); } }
private 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); } }
private void TriangulateWaterShore( HexDirection direction, HexCell cell, HexCell neighbor, Vector3 center ) { EdgeVertices e1 = new EdgeVertices( center + HexMetrics.GetFirstWaterCorner(direction), center + HexMetrics.GetSecondWaterCorner(direction) ); water.AddTriangle(center, e1.v1, e1.v2); water.AddTriangle(center, e1.v2, e1.v3); water.AddTriangle(center, e1.v3, e1.v4); water.AddTriangle(center, e1.v4, e1.v5); Vector3 indices; indices.x = indices.z = cell.Index; indices.y = neighbor.Index; water.AddTriangleCellData(indices, weights1); water.AddTriangleCellData(indices, weights1); water.AddTriangleCellData(indices, weights1); water.AddTriangleCellData(indices, weights1); Vector3 center2 = neighbor.Position; if (neighbor.ColumnIndex < cell.ColumnIndex - 1) { center2.x += HexMetrics.wrapSize * HexMetrics.innerDiameter; } else if (neighbor.ColumnIndex > cell.ColumnIndex + 1) { center2.x -= HexMetrics.wrapSize * HexMetrics.innerDiameter; } center2.y = center.y; EdgeVertices e2 = new EdgeVertices( center2 + HexMetrics.GetSecondSolidCorner(direction.Opposite()), center2 + HexMetrics.GetFirstSolidCorner(direction.Opposite()) ); if (cell.HasRiverThroughEdge(direction)) { TriangulateEstuary(e1, e2, cell.HasIncomingRiver && cell.IncomingRiver == direction, indices); } else { waterShore.AddQuad(e1.v1, e1.v2, e2.v1, e2.v2); waterShore.AddQuad(e1.v2, e1.v3, e2.v2, e2.v3); waterShore.AddQuad(e1.v3, e1.v4, e2.v3, e2.v4); waterShore.AddQuad(e1.v4, e1.v5, e2.v4, e2.v5); waterShore.AddQuadUV(0f, 0f, 0f, 1f); waterShore.AddQuadUV(0f, 0f, 0f, 1f); waterShore.AddQuadUV(0f, 0f, 0f, 1f); waterShore.AddQuadUV(0f, 0f, 0f, 1f); waterShore.AddQuadCellData(indices, weights1, weights2); waterShore.AddQuadCellData(indices, weights1, weights2); waterShore.AddQuadCellData(indices, weights1, weights2); waterShore.AddQuadCellData(indices, weights1, weights2); } HexCell nextNeighbor = cell.GetNeighbor(direction.Next()); if (nextNeighbor != null) { Vector3 center3 = nextNeighbor.Position; if (nextNeighbor.ColumnIndex < cell.ColumnIndex - 1) { center3.x += HexMetrics.wrapSize * HexMetrics.innerDiameter; } else if (nextNeighbor.ColumnIndex > cell.ColumnIndex + 1) { center3.x -= HexMetrics.wrapSize * HexMetrics.innerDiameter; } Vector3 v3 = center3 + (nextNeighbor.IsUnderwater ? HexMetrics.GetFirstWaterCorner(direction.Previous()) : HexMetrics.GetFirstSolidCorner(direction.Previous())); v3.y = center.y; waterShore.AddTriangle(e1.v5, e2.v5, v3); waterShore.AddTriangleUV( new Vector2(0f, 0f), new Vector2(0f, 1f), new Vector2(0f, nextNeighbor.IsUnderwater ? 0f : 1f) ); indices.z = nextNeighbor.Index; waterShore.AddTriangleCellData( indices, weights1, weights2, weights3 ); } }
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; // push the road center in the opposite direction of river if (cell.HasRiverBeginOrEnd) { roadCenter += HexMetrics.GetSolidEdgeMiddle(cell.RiverBeginOrEndDirection.Opposite()) * (1f / 3f); } // Check if river is a straight else if (cell.IncomingRiver == cell.OutgoingRiver.Opposite()) { Vector3 corner; if (previousHasRiver) { // Skip triangulation if there is no road on this side on=f the river if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Next())) { return; } corner = HexMetrics.GetSecondSolidCorner(direction); } else { // Skip triangulation if there is no road on this side on=f the river if (!hasRoadThroughEdge && !cell.HasRoadThroughEdge(direction.Previous())) { return; } corner = HexMetrics.GetFirstSolidCorner(direction); } roadCenter += corner * 0.5f; // Add bridge once per cell, if there is a 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; } // Check if river is a zigzag 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; } // Check if we are inside of a curve else if (previousHasRiver && nextHasRiver) { if (!hasRoadThroughEdge) { return; } Vector3 offset = HexMetrics.GetSolidEdgeMiddle(direction) * HexMetrics.innerToOutter; roadCenter += offset * 0.7f; center += offset * 0.5f; } // We are outside of a curve else { HexDirection middle; if (previousHasRiver) { middle = direction.Next(); } else if (nextHasRiver) { middle = direction.Previous(); } else { middle = direction; } if (!cell.HasRoadThroughEdge(middle.Previous()) && !cell.HasRoadThroughEdge(middle) && !cell.HasRoadThroughEdge(middle.Next())) { return; } Vector3 offset = HexMetrics.GetSolidEdgeMiddle(middle); roadCenter += offset * 0.25f; // Add bridge once per cell, if there is a road on both sides if (direction == middle && cell.HasRoadThroughEdge(direction.Opposite())) { features.AddBridge(roadCenter, center - offset * (HexMetrics.innerToOutter * 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); if (previousHasRiver) { TriangulateRoadEdge(roadCenter, center, mL); } if (nextHasRiver) { TriangulateRoadEdge(roadCenter, mR, center); } }