protected override void Init()
{
base.Init();
position = new double[] { 0, 0, 0 };
scale = new ExpressionD("1");
trans = new VectorExpr(new string[] { "0", "0", "0" });
color = new VectorExpr(new string[] { "1", "0", "1", "0" });
origin = new VectorExpr(new string[] { "0", "0", "0" });
rot = new VectorExpr(new string[] { "0", "0", "0" });
}
/// <summary>
/// Returns an array of points representing a graph in polar coordinates
/// </summary>
/// <param name="expression">What to graph</param>
/// <param name="start">Theta value to begin at</param>
/// <param name="stop">Theta value to end at</param>
/// <param name="step">Theta resolution</param>
/// <returns></returns>
public static double[,] GraphPolar(ExpressionD expression, double start, double stop, double step)
{
if (start >= stop || step <= 0)
{
throw new Exception("Cannot graph polar, invalid arguments");
}
double[,] result;
ArrayList points = new ArrayList();
//Perform calculations
ExpressionD.AddSymbol("i", 0);
int index = 0;
double theta;
for (double i = start; i < stop; i += step)
{
ExpressionD.SetSymbolValue("i", i * Math.PI / 180.0);
theta = i * Math.PI / 180.0;
points.Add(new Point3(
expression.Evaluate() * Math.Sin(theta),
expression.Evaluate() * Math.Cos(theta),
0
));
index++;
}
ExpressionD.RemoveSymbol("i");
//Convert
result = new double[3, points.Count];
int count = 0;
foreach (Point3 p in points)
{
result[0, count] = p.x;
result[1, count] = p.y;
result[2, count] = p.z;
count++;
}
return(result);
}
public override void Recalculate()
{
//base.Recalculate();
//Setup expression values
ExpressionD.AddSymbol("dist", 0);
ExpressionD.AddSymbol("length", length);
ExpressionD.AddSymbol("xslope", 0);
ExpressionD.AddSymbol("yslope", 0);
ExpressionD.AddSymbol("zslope", 0);
//Set the properties of the child objects
foreach (PenVertex penVert in vertecies)
{
//Set variables
ExpressionD.SetSymbolValue("dist", penVert.distance);
ExpressionD.SetSymbolValue("xslope", penVert.slope[0]);
ExpressionD.SetSymbolValue("yslope", penVert.slope[1]);
ExpressionD.SetSymbolValue("zslope", penVert.slope[2]);
//Calculate
color.Recalculate();
//Set
((SimpleObject3)penVert.obj).Recalculate();
((SimpleObject3)penVert.obj).SetColor(color.Values());
((SimpleObject3)penVert.obj).ScaleGeo(scale.Evaluate());
((SimpleObject3)penVert.obj).TranslateGeo(penVert.x, penVert.y, penVert.z);
}
//Remove them as the program leaves scope
ExpressionD.RemoveSymbol("dist");
ExpressionD.RemoveSymbol("length");
ExpressionD.RemoveSymbol("xslope");
ExpressionD.RemoveSymbol("yslope");
ExpressionD.RemoveSymbol("zslope");
}
public override void Draw()
{
foreach (PenVertex penVert in vertecies)
{
double dist = speed * ExpressionD.GetSymbolValue("time");
double sdfs = penVert.distance;
if (speed >= 0)
{
if (penVert.distance < dist)
{
penVert.obj.Draw();
}
else
{
vertecies.Reset();
break;
}
}
else
{
penVert.obj.Draw();
}
}
}
/// <summary>
/// Sets the expression at the given index
/// </summary>
/// <param name="index"></param>
/// <param name="expr"></param>
public void SetExprAt(int index, string expr)
{
expressions[index] = new ExpressionD(expr);
}
public override void SetAttributes(Dictionary <string, string> args)
{
base.SetAttributes(args);
#region Set Rotational Values
if (args.ContainsKey("rotation"))
{
rot = new VectorExpr(new string[] {
args["rotation"], args["rotation"], args["rotation"]
});
}
if (args.ContainsKey("xrotation"))
{
rot.SetExprAt(0, args["xrotation"]);
}
if (args.ContainsKey("yrotation"))
{
rot.SetExprAt(1, args["yrotation"]);
}
if (args.ContainsKey("zrotation"))
{
rot.SetExprAt(2, args["zrotation"]);
}
#endregion
#region Set Color Values
if (args.ContainsKey("color"))
{
color = new VectorExpr(new string[] {
args["color"], args["color"], args["color"], args["color"]
});
}
if (args.ContainsKey("rcolor"))
{
color.SetExprAt(0, args["rcolor"]);
}
if (args.ContainsKey("gcolor"))
{
color.SetExprAt(1, args["gcolor"]);
}
if (args.ContainsKey("bcolor"))
{
color.SetExprAt(2, args["bcolor"]);
}
if (args.ContainsKey("acolor"))
{
color.SetExprAt(3, args["acolor"]);
}
#endregion
if (args.ContainsKey("scale"))
{
scale = new ExpressionD(args["scale"]);
}
}