void TriangulateEdgeStrip(TriMesh mesh, EdgeVertices e1, Color c1, EdgeVertices e2, Color c2, bool isRiverInDir)
{
mesh.AddQuad(e1.v1, e1.v2, e2.v1, e2.v2);
mesh.AddQuadColor(c1, c2);
if (isRiverInDir)
{
Vector3 t = new Vector3(0, TriMetrics.waterElevationOffset, 0);
rivers.AddQuad(e1.v2 + t, e1.v4 + t, e2.v2 + t, e2.v4 + t);
rivers.AddQuadColor(Color.blue, Color.blue);
}
else
{
mesh.AddQuad(e1.v2, e1.v4, e2.v2, e2.v4);
mesh.AddQuadColor(c1, c2);
}
mesh.AddQuad(e1.v4, e1.v5, e2.v4, e2.v5);
mesh.AddQuadColor(c1, c2);
}
void TriangulateWithRiver(TriCell cell, TriDirection direction, Vector3 center, EdgeVertices edge, Color color)
{
Vector3 riverOffset = new Vector3(0, TriMetrics.streamBedElevationOffset - TriMetrics.waterElevationOffset, 0);
Vector3 nextCorner, prevCorner;
nextCorner = (center + edge.v1) / 2f;
prevCorner = (center + edge.v5) / 2f;
Vector3 underCenter = center, underNextCorner = nextCorner, underPrevCorner = prevCorner;
underCenter.y += TriMetrics.streamBedElevationOffset;
underNextCorner.y += TriMetrics.streamBedElevationOffset;
underPrevCorner.y += TriMetrics.streamBedElevationOffset;
EdgeVertices underEdge = edge;
underEdge.v1.y += TriMetrics.streamBedElevationOffset;
underEdge.v2.y += TriMetrics.streamBedElevationOffset;
underEdge.v3.y += TriMetrics.streamBedElevationOffset;
underEdge.v4.y += TriMetrics.streamBedElevationOffset;
underEdge.v5.y += TriMetrics.streamBedElevationOffset;
terrain.AddTriangle(nextCorner, edge.v1, edge.v2);
terrain.AddTriangle(prevCorner, edge.v4, edge.v5);
terrain.AddTriangle(underCenter, underEdge.v2, underEdge.v4);
terrain.AddTriangleColor(color);
terrain.AddTriangleColor(color);
terrain.AddTriangleColor(color);
if (!cell.IsUnderwater)
{
rivers.AddTriangle(underCenter - riverOffset, underEdge.v2 - riverOffset, underEdge.v4 - riverOffset);
rivers.AddTriangleColor(Color.blue);
}
if (cell.HasRiverThroughEdge(direction.Next()))
{
terrain.AddTriangle(underEdge.v4, underPrevCorner, underCenter);
terrain.AddTriangleColor(color);
if (!cell.IsUnderwater)
{
rivers.AddTriangle(underEdge.v4 - riverOffset, underPrevCorner - riverOffset, underCenter - riverOffset);
rivers.AddTriangleColor(Color.blue);
}
terrain.AddQuad(underPrevCorner, prevCorner, underEdge.v4, edge.v4);
terrain.AddQuadColor(color, color);
}
else
{
terrain.AddTriangle(center, edge.v4, prevCorner);
terrain.AddQuad(underCenter, center, underEdge.v4, edge.v4);
terrain.AddTriangleColor(color);
terrain.AddQuadColor(color, color);
}
if (cell.HasRiverThroughEdge(direction.Previous()))
{
terrain.AddTriangle(underEdge.v2, underCenter, underNextCorner);
terrain.AddTriangleColor(color);
if (!cell.IsUnderwater)
{
rivers.AddTriangle(underEdge.v2 - riverOffset, underCenter - riverOffset, underNextCorner - riverOffset);
rivers.AddTriangleColor(Color.blue);
}
terrain.AddQuad(underEdge.v2, edge.v2, underNextCorner, nextCorner);
terrain.AddQuadColor(color, color);
}
else
{
terrain.AddTriangle(center, nextCorner, edge.v2);
terrain.AddQuad(underEdge.v2, edge.v2, underCenter, center);
terrain.AddTriangleColor(color);
terrain.AddQuadColor(color, color);
}
}