VerticalBars3DPainter.cs

using System;
using System.Numerics;
using Waher.Script.Objects.VectorSpaces;
using Waher.Script.Graphs.Functions.Plots;
 
namespace Waher.Script.Graphs3D.Functions.Plots
{
    public class VerticalBars3DPainter : SingleColorGraphPainter, IPainter3D
    {
        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);
                }
            }
        }
    }
}