/// <summary>
/// Creates a mesh with a horizontal and vertical resolution indicated
/// by the input parameters. It will generate
/// (precisionU-1)*(precisionV-1) quads.
/// </summary>
public MeshGeometry3D CreateMesh(int precisionU, int precisionV)
{
_lengthX = precisionU;
_lengthY = precisionV;
_du = (UMax - UMin) / (precisionU - 1);
_dv = (VMax - VMin) / (precisionV - 1);
_positions = new Point3D[_lengthX, _lengthY];
_normals = new Vector3D[_lengthX, _lengthY];
_textureCoords = new Point[_lengthX, _lengthY];
_indices = new ArrayList();
var v = VMin;
for (var y = 0; y < _lengthY; y++)
{
var u = UMin;
if (y == _lengthY - 1)
{
v = VMax;
}
for (var x = 0; x < _lengthX; x++)
{
if (x == _lengthX - 1)
{
u = UMax;
}
VariableExpression.Define("u", u);
VariableExpression.Define("v", v);
_positions[x, y] = Evaluate();
_normals[x, y] = GetNormal(u, v);
u += _du;
}
v += _dv;
}
VariableExpression.Undefine("u");
VariableExpression.Undefine("v");
SetTextureCoordinates();
SetIndices();
var mesh = new MeshGeometry3D();
for (var y = 0; y < _lengthY; y++)
{
for (var x = 0; x < _lengthX; x++)
{
mesh.Positions.Add(_positions[x, y]);
mesh.Normals.Add(_normals[x, y]);
mesh.TextureCoordinates.Add(_textureCoords[x, y]);
}
}
mesh.TriangleIndices = new Int32Collection();
foreach (int index in _indices)
{
mesh.TriangleIndices.Add(index);
}
return(mesh);
}
/// <summary>
/// Creates a mesh with a horizontal and vertical resolution indicated
/// by the input parameters. It will generate
/// (precisionU-1)*(precisionV-1) quads.
/// </summary>
public Model3DGroup CreateWireframeModel(int precisionU, int precisionV)
{
_lengthX = precisionU;
_lengthY = precisionV;
_du = (UMax - UMin) / (precisionU - 1);
_dv = (VMax - VMin) / (precisionV - 1);
_positions = new Point3D[_lengthX, _lengthY];
var v = VMin;
for (var y = 0; y < _lengthY; y++)
{
var u = UMin;
if (y == _lengthY - 1)
{
v = VMax;
}
for (var x = 0; x < _lengthX; x++)
{
if (x == _lengthX - 1)
{
u = UMax;
}
VariableExpression.Define("u", u);
VariableExpression.Define("v", v);
_positions[x, y] = Evaluate();
u += _du;
}
v += _dv;
}
VariableExpression.Undefine("u");
VariableExpression.Undefine("v");
var group = new Model3DGroup();
// TODO: Remove
//ScreenSpaceLines3D lines;
/*
* // Create Horizontal lines
* for ( int y = 0; y < lengthY; y++ )
* {
* lines = new ScreenSpaceLines3D();
* lines.Color = Colors.Black;
* lines.Thickness = 1;
* for ( int x = 0; x < lengthX; x++ )
* {
* lines.Points.Add( positions[ x,y ] );
* }
* group.Children.Add( lines );
* }
*
* // Create Vertical lines
* for ( int x = 0; x < lengthX; x++ )
* {
* lines = new ScreenSpaceLines3D();
* lines.Color = Colors.Black;
* lines.Thickness = 1;
* for ( int y = 0; y < lengthY; y++ )
* {
* lines.Points.Add( positions[ x,y ] );
* }
* group.Children.Add( lines );
* }
*/
return(group);
}
