/// <summary>
/// This is the method that actually does the work.
/// </summary>
/// <param name="DA">The DA object can be used to retrieve data from input parameters and
/// to store data in output parameters.</param>
protected override void SolveInstance(IGH_DataAccess DA)
{
// 1. Retrieve and validate inputs
var cell = new UnitCell();
Surface s1 = null;
Surface s2 = null;
int nU = 0;
int nV = 0;
int nW = 0;
bool morphed = false;
if (!DA.GetData(0, ref cell)) { return; }
if (!DA.GetData(1, ref s1)) { return; }
if (!DA.GetData(2, ref s2)) { return; }
if (!DA.GetData(3, ref nU)) { return; }
if (!DA.GetData(4, ref nV)) { return; }
if (!DA.GetData(5, ref nW)) { return; }
if (!DA.GetData(6, ref morphed)) { return; }
if (!cell.isValid) { return; }
if (!s1.IsValid) { return; }
if (!s2.IsValid) { return; }
if (nU == 0) { return; }
if (nV == 0) { return; }
if (nW == 0) { return; }
// 2. Initialize the lattice
var lattice = new Lattice();
// Will contain the morphed uv spaces (as surface-surface)
var spaceTree = new DataTree<GeometryBase>();
// 3. Package the number of cells in each direction into an array
float[] N = new float[3] { nU, nV, nW };
// 4. Normalize the UV-domain
Interval unitDomain = new Interval(0,1);
s1.SetDomain(0, unitDomain); // s1 u-direction
s1.SetDomain(1, unitDomain); // s1 v-direction
s2.SetDomain(0, unitDomain); // s2 u-direction
s2.SetDomain(1, unitDomain); // s2 v-direction
// 5. Prepare cell (this is a UnitCell object)
cell = cell.Duplicate();
cell.FormatTopology();
// 6. Map nodes to design space
// Loop through the uvw cell grid
for (int u = 0; u <= N[0]; u++)
{
for (int v = 0; v <= N[1]; v++)
{
for (int w = 0; w <= N[2]; w++)
{
// Construct cell path in tree
GH_Path treePath = new GH_Path(u, v, w);
// Fetch the list of nodes to append to, or initialise it
var nodeList = lattice.Nodes.EnsurePath(treePath);
// This loop maps each node in the cell onto the UV-surface maps
for (int i = 0; i < cell.Nodes.Count; i++)
{
double usub = cell.Nodes[i].X; // u-position within unit cell (local)
double vsub = cell.Nodes[i].Y; // v-position within unit cell (local)
double wsub = cell.Nodes[i].Z; // w-position within unit cell (local)
double[] uvw = { u + usub, v + vsub, w + wsub }; // uvw-position (global)
// Check if the node belongs to another cell (i.e. it's relative path points outside the current cell)
bool isOutsideCell = (cell.NodePaths[i][0] > 0 || cell.NodePaths[i][1] > 0 || cell.NodePaths[i][2] > 0);
// Check if current uvw-position is beyond the upper boundary
bool isOutsideSpace = (uvw[0] > N[0] || uvw[1] > N[1] || uvw[2] > N[2]);
if (isOutsideCell || isOutsideSpace)
{
nodeList.Add(null);
}
else
{
// Initialize for surface 1
Point3d pt1; Vector3d[] derivatives1;
// Initialize for surface 2
Point3d pt2; Vector3d[] derivatives2;
// Evaluate point on both surfaces
s1.Evaluate(uvw[0] / N[0], uvw[1] / N[1], 2, out pt1, out derivatives1);
s2.Evaluate(uvw[0] / N[0], uvw[1] / N[1], 2, out pt2, out derivatives2);
// Create vector joining the two points (this is our w-range)
Vector3d wVect = pt2 - pt1;
// Create the node, accounting for the position along the w-direction
var newNode = new LatticeNode(pt1 + wVect * uvw[2] / N[2]);
// Add node to tree
nodeList.Add(newNode);
}
}
}
// Define the uv space tree (used for morphing)
if (morphed && u < N[0] && v < N[1])
{
GH_Path spacePath = new GH_Path(u, v);
// Set trimming interval
var uInterval = new Interval((u) / N[0], (u + 1) / N[0]);
var vInterval = new Interval((v) / N[1], (v + 1) / N[1]);
// Create sub-surfaces
Surface ss1 = s1.Trim(uInterval, vInterval);
Surface ss2 = s2.Trim(uInterval, vInterval);
// Unitize domain
ss1.SetDomain(0, unitDomain); ss1.SetDomain(1, unitDomain);
ss2.SetDomain(0, unitDomain); ss2.SetDomain(1, unitDomain);
// Save to the space tree
spaceTree.Add(ss1, spacePath);
spaceTree.Add(ss2, spacePath);
}
}
}
// 7. Map struts to the node tree
if (morphed) lattice.MorphMapping(cell, spaceTree, N);
else lattice.ConformMapping(cell, N);
// 8. Set output
DA.SetDataList(0, lattice.Struts);
}
/// <summary>
/// This is the method that actually does the work.
/// </summary>
/// <param name="DA">The DA object can be used to retrieve data from input parameters and
/// to store data in output parameters.</param>
protected override void SolveInstance(IGH_DataAccess DA)
{
// 1. Retrieve and validate data
var cell = new UnitCell();
double radius = 0;
double height = 0;
int nU = 0;
int nV = 0;
int nW = 0;
bool morphed = false;
if (!DA.GetData(0, ref cell)) { return; }
if (!DA.GetData(1, ref radius)) { return; }
if (!DA.GetData(2, ref height)) { return; }
if (!DA.GetData(3, ref nU)) { return; }
if (!DA.GetData(4, ref nV)) { return; }
if (!DA.GetData(5, ref nW)) { return; }
if (!DA.GetData(6, ref morphed)) { return; }
if (!cell.isValid) { return; }
if (radius == 0) { return; }
if (height == 0) { return; }
if (nU == 0) { return; }
if (nV == 0) { return; }
if (nW == 0) { return; }
// 2. Initialize the lattice
var lattice = new Lattice();
// Will contain the morphed uv spaces (as surface-surface, surface-axis or surface-point)
var spaceTree = new DataTree<GeometryBase>();
// 3. Define cylinder
Plane basePlane = Plane.WorldXY;
Surface cylinder = ( new Cylinder(new Circle(basePlane, radius), height) ).ToNurbsSurface();
cylinder = cylinder.Transpose();
LineCurve axis = new LineCurve(basePlane.Origin, basePlane.Origin + height*basePlane.ZAxis);
// 4. Package the number of cells in each direction into an array
float[] N = new float[3] { nU, nV, nW };
// 5. Normalize the UV-domain
Interval unitDomain = new Interval(0, 1);
cylinder.SetDomain(0, unitDomain); // surface u-direction
cylinder.SetDomain(1, unitDomain); // surface v-direction
axis.Domain = unitDomain;
// 6. Prepare cell (this is a UnitCell object)
cell = cell.Duplicate();
cell.FormatTopology();
// 7. Map nodes to design space
// Loop through the uvw cell grid
for (int u = 0; u <= N[0]; u++)
{
for (int v = 0; v <= N[1]; v++)
{
for (int w = 0; w <= N[2]; w++)
{
// Construct cell path in tree
GH_Path treePath = new GH_Path(u, v, w);
// Fetch the list of nodes to append to, or initialise it
var nodeList = lattice.Nodes.EnsurePath(treePath);
// This loop maps each node index in the cell onto the UV-surface maps
for (int i = 0; i < cell.Nodes.Count; i++)
{
double usub = cell.Nodes[i].X; // u-position within unit cell (local)
double vsub = cell.Nodes[i].Y; // v-position within unit cell (local)
double wsub = cell.Nodes[i].Z; // w-position within unit cell (local)
double[] uvw = { u + usub, v + vsub, w + wsub }; // uvw-position (global)
// Check if the node belongs to another cell (i.e. it's relative path points outside the current cell)
bool isOutsideCell = (cell.NodePaths[i][0] > 0 || cell.NodePaths[i][1] > 0 || cell.NodePaths[i][2] > 0);
// Check if current uvw-position is beyond the upper boundary
bool isOutsideSpace = (uvw[0] > N[0] || uvw[1] > N[1] || uvw[2] > N[2]);
if (isOutsideCell || isOutsideSpace)
{
nodeList.Add(null);
}
else
{
Point3d pt1, pt2;
Vector3d[] derivatives;
// Construct z-position vector
Vector3d vectorZ = height * basePlane.ZAxis * uvw[0] / N[0];
// Compute pt1 (on axis)
pt1 = basePlane.Origin + vectorZ;
// Compute pt2 (on surface)
cylinder.Evaluate(uvw[0] / N[0], uvw[1] / N[1], 2, out pt2, out derivatives);
// Create vector joining these two points
Vector3d wVect = pt2 - pt1;
// Instantiate new node
var newNode = new LatticeNode(pt1 + wVect * uvw[2] / N[2]);
// Add new node to tree
nodeList.Add(newNode);
}
}
}
// Define the uv space map tree (used for morphing)
if (morphed && u < N[0] && v < N[1])
{
GH_Path spacePath = new GH_Path(u, v);
// Set trimming interval
var uInterval = new Interval((u) / N[0], (u + 1) / N[0]);
var vInterval = new Interval((v) / N[1], (v + 1) / N[1]);
// Create sub-surface and sub axis
Surface ss1 = cylinder.Trim(uInterval, vInterval);
Curve ss2 = axis.Trim(uInterval);
// Unitize domains
ss1.SetDomain(0, unitDomain); ss1.SetDomain(1, unitDomain);
ss2.Domain = unitDomain;
// Save to the space tree
spaceTree.Add(ss1, spacePath);
spaceTree.Add(ss2, spacePath);
}
}
}
// 8. Map struts to the node tree
if (morphed)
{
lattice.MorphMapping(cell, spaceTree, N);
}
else
{
lattice.ConformMapping(cell, N);
}
// 9. Set output
DA.SetDataList(0, lattice.Struts);
}