/// <summary>
/// Draws the graph on a canvas.
/// </summary>
/// <param name="Canvas">Canvas to draw on.</param>
/// <param name="Points">Points to draw.</param>
/// <param name="Normals">Optional normals.</param>
/// <param name="Parameters">Graph-specific parameters.</param>
/// <param name="PrevPoints">Points of previous graph of same type (if available), null (if not available).</param>
/// <param name="PrevNormals">Optional normals of previous graph of same type (if available), null (if not available).</param>
/// <param name="PrevParameters">Parameters of previous graph of same type (if available), null (if not available).</param>
/// <param name="DrawingVolume">Current drawing volume.</param>
public void DrawGraph(Graphs3D.Canvas3D Canvas, Vector4[,] Points, Vector4[,] Normals,
object[] Parameters, Vector4[,] PrevPoints, Vector4[,] PrevNormals,
object[] PrevParameters, DrawingVolume DrawingVolume)
{
int i, c = Points.GetLength(0);
int j, d = Points.GetLength(1);
I3DShader Shader = Graph3D.ToShader(Parameters[0]);
bool TwoSided = Expression.ToDouble(Parameters[1]) != 0;
Vector4[] Nodes = new Vector4[4];
c--;
d--;
for (i = 0; i < c; i++)
{
for (j = 0; j < d; j++)
{
Nodes[0] = Points[i, j];
Nodes[1] = Points[i + 1, j];
Nodes[2] = Points[i + 1, j + 1];
Nodes[3] = Points[i, j + 1];
Canvas.Polygon(Nodes, Shader, TwoSided);
}
}
}
/// <summary>
/// Draws the graph on a canvas.
/// </summary>
/// <param name="Canvas">Canvas to draw on.</param>
/// <param name="Points">Points to draw.</param>
/// <param name="Normals">Optional normals.</param>
/// <param name="Parameters">Graph-specific parameters.</param>
/// <param name="PrevPoints">Points of previous graph of same type (if available), null (if not available).</param>
/// <param name="PrevNormals">Optional normals of previous graph of same type (if available), null (if not available).</param>
/// <param name="PrevParameters">Parameters of previous graph of same type (if available), null (if not available).</param>
/// <param name="DrawingVolume">Current drawing volume.</param>
public void DrawGraph(Graphs3D.Canvas3D Canvas, Vector4[,] Points, Vector4[,] Normals,
object[] Parameters, Vector4[,] PrevPoints, Vector4[,] PrevNormals,
object[] PrevParameters, DrawingVolume DrawingVolume)
{
int i, c = Points.GetLength(0);
int j, d = Points.GetLength(1);
I3DShader Shader = Graph3D.ToShader(Parameters[0]);
Vector3 P1, P2;
float dx, dz;
int i0, j0;
double[] v = DrawingVolume.ScaleY(new DoubleVector(0));
float OrigoY = (float)v[0];
for (i = 0; i < c; i++)
{
i0 = i == 0 ? i : i - 1;
for (j = 0; j < d; j++)
{
j0 = j == 0 ? j : j - 1;
P1 = Graphs3D.Canvas3D.ToVector3(Points[i0, j0]);
P2 = Graphs3D.Canvas3D.ToVector3(Points[i0 + 1, j0 + 1]);
dx = P2.X - P1.X;
dz = P2.Z - P1.Z;
P1 = Graphs3D.Canvas3D.ToVector3(Points[i, j]);
dx /= 2;
dz /= 2;
Canvas.Box(P1.X - dx, OrigoY, P1.Z - dz, P1.X + dx, P1.Y, P1.Z + dz, Shader);
}
}
}
/// <summary>
/// Draws the graph on a canvas.
/// </summary>
/// <param name="Canvas">Canvas to draw on.</param>
/// <param name="Points">Points to draw.</param>
/// <param name="Normals">Optional normals.</param>
/// <param name="Parameters">Graph-specific parameters.</param>
/// <param name="PrevPoints">Points of previous graph of same type (if available), null (if not available).</param>
/// <param name="PrevNormals">Optional normals of previous graph of same type (if available), null (if not available).</param>
/// <param name="PrevParameters">Parameters of previous graph of same type (if available), null (if not available).</param>
/// <param name="DrawingVolume">Current drawing volume.</param>
public void DrawGraph(Graphs3D.Canvas3D Canvas, Vector4[,] Points, Vector4[,] Normals,
object[] Parameters, Vector4[,] PrevPoints, Vector4[,] PrevNormals,
object[] PrevParameters, DrawingVolume DrawingVolume)
{
int i, c = Points.GetLength(0);
int j, d = Points.GetLength(1);
I3DShader Shader = Graph3D.ToShader(Parameters[0]);
bool TwoSided = Expression.ToDouble(Parameters[1]) != 0;
Vector4[] Nodes = new Vector4[4];
Vector4[] NodeNormals = new Vector4[4];
c--;
d--;
if (Normals is null)
{
Vector4[,] N = new Vector4[c + 1, d + 1];
Vector4 P1, P2, P3;
int n;
for (i = 0; i < c; i++)
{
for (j = 0; j < d; j++)
{
P1 = Points[i, j];
P2 = Points[i + 1, j];
if (P1 == P2)
{
P2 = Points[i + 1, j + 1];
}
P3 = Points[i, j + 1];
if (P1 == P3)
{
P3 = Points[i + 1, j + 1];
}
N[i, j] = Graphs3D.Canvas3D.CalcNormal(P1, P2, P3);
}
if (Vector4.Distance(Points[i, d], Points[i, 0]) < 1e-10f)
{
N[i, d] = N[i, 0];
}
else
{
N[i, d] = N[i, d - 1];
}
}
for (j = 0; j <= d; j++)
{
if (Vector4.Distance(Points[c, j], Points[0, j]) < 1e-10f)
{
N[c, j] = N[0, j];
}
else
{
N[c, j] = N[c - 1, j];
}
}
Normals = new Vector4[c + 1, d + 1];
for (i = 0; i <= c; i++)
{
for (j = 0; j <= d; j++)
{
P1 = N[i, j];
n = 1;
if (i > 0)
{
P1 += N[i - 1, j];
n++;
if (j > 0)
{
P1 += N[i - 1, j - 1];
n++;
}
}
if (j > 0)
{
P1 += N[i, j - 1];
n++;
}
Normals[i, j] = P1 / n;
}
}
}
for (i = 0; i < c; i++)
{
for (j = 0; j < d; j++)
{
Nodes[0] = Points[i, j];
Nodes[1] = Points[i + 1, j];
Nodes[2] = Points[i + 1, j + 1];
Nodes[3] = Points[i, j + 1];
NodeNormals[0] = Normals[i, j];
NodeNormals[1] = Normals[i + 1, j];
NodeNormals[2] = Normals[i + 1, j + 1];
NodeNormals[3] = Normals[i, j + 1];
Canvas.Polygon(Nodes, NodeNormals, Shader, TwoSided);
}
}
}