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HalleyTopographyFractal.cs
1using System;
2using System.Numerics;
3using System.Text;
4using SkiaSharp;
5using Waher.Script.Abstraction.Elements;
6using Waher.Script.Model;
7using Waher.Script.Exceptions;
8using Waher.Script.Objects.VectorSpaces;
9using Waher.Script.Fractals.Exceptions;
10
11namespace Waher.Script.Fractals.ComplexFractals
12{
40 public class HalleyTopographyFractal : FunctionMultiVariate
41 {
45 public HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients,
46 ScriptNode Palette, ScriptNode DimX, ScriptNode DimY, int Start, int Length, Expression Expression)
47 : base(new ScriptNode[] { z, dr, R, Coefficients, Palette, DimX, DimY },
48 new ArgumentType[] { ArgumentType.Scalar, ArgumentType.Scalar, ArgumentType.Scalar,
49 ArgumentType.Normal, ArgumentType.Vector, ArgumentType.Scalar, ArgumentType.Scalar}, Start, Length, Expression)
50 {
51 }
52
56 public HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients,
57 ScriptNode Palette, ScriptNode DimX, int Start, int Length, Expression Expression)
58 : base(new ScriptNode[] { z, dr, R, Coefficients, Palette, DimX },
59 new ArgumentType[] { ArgumentType.Scalar, ArgumentType.Scalar, ArgumentType.Scalar,
60 ArgumentType.Normal, ArgumentType.Vector, ArgumentType.Scalar}, Start, Length, Expression)
61 {
62 }
63
67 public HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients,
68 ScriptNode Palette, int Start, int Length, Expression Expression)
69 : base(new ScriptNode[] { z, dr, R, Coefficients, Palette },
70 new ArgumentType[] { ArgumentType.Scalar, ArgumentType.Scalar, ArgumentType.Scalar,
71 ArgumentType.Normal, ArgumentType.Vector}, Start, Length, Expression)
72 {
73 }
74
78 public HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients,
79 int Start, int Length, Expression Expression)
80 : base(new ScriptNode[] { z, dr, R, Coefficients },
81 new ArgumentType[] { ArgumentType.Scalar, ArgumentType.Scalar, ArgumentType.Scalar,
82 ArgumentType.Normal}, Start, Length, Expression)
83 {
84 }
85
89 public HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, int Start, int Length, Expression Expression)
90 : base(new ScriptNode[] { z, dr, R },
91 new ArgumentType[] { ArgumentType.Scalar, ArgumentType.Scalar, ArgumentType.Scalar }, Start, Length, Expression)
92 {
93 }
94
98 public HalleyTopographyFractal(ScriptNode z, ScriptNode dr, int Start, int Length, Expression Expression)
99 : base(new ScriptNode[] { z, dr },
100 new ArgumentType[] { ArgumentType.Scalar, ArgumentType.Scalar }, Start, Length, Expression)
101 {
102 }
103
107 public override string[] DefaultArgumentNames
108 {
109 get
110 {
111 return new string[] { "z", "dr", "R", "Coefficients", "Palette", "DimX", "DimY" };
112 }
113 }
114
118 public override IElement Evaluate(IElement[] Arguments, Variables Variables)
119 {
120 string ColorExpression = null;
121 SKColor[] Palette;
122 double[] Coefficients = null;
123 Complex[] CoefficientsZ = null;
124 ILambdaExpression f = null;
125 ScriptNode fDef = null;
126 double rc, ic;
127 double dr;
128 Complex R;
129 int dimx, dimy;
130 int c = Arguments.Length;
131 int i = 0;
132 object Obj;
133
134 Obj = Arguments[i++].AssociatedObjectValue;
135 if (Obj is Complex z)
136 {
137 rc = z.Real;
138 ic = z.Imaginary;
139 }
140 else
141 {
142 rc = Expression.ToDouble(Obj);
143 ic = Expression.ToDouble(Arguments[i++].AssociatedObjectValue);
144 }
145
146 if (i >= c)
147 throw new ScriptRuntimeException("Insufficient parameters in call to HalleyTopographyFractal().", this);
148
149 dr = Expression.ToDouble(Arguments[i++].AssociatedObjectValue);
150
151 if (i < c && ((Obj = Arguments[i].AssociatedObjectValue) is double || Obj is Complex))
152 {
153 R = Expression.ToComplex(Obj);
154 i++;
155 }
156 else
157 {
158 R = Complex.One;
159
160 if (i < c && this.Arguments[i] is null)
161 i++;
162 }
163
164 if (i < c)
165 {
166 if (Arguments[i] is DoubleVector)
167 Coefficients = (double[])Arguments[i++].AssociatedObjectValue;
168 else if (Arguments[i] is ComplexVector)
169 CoefficientsZ = (Complex[])Arguments[i++].AssociatedObjectValue;
170 /*else if (Parameters[i] is RealPolynomial)
171 Coefficients = ((RealPolynomial)Arguments[i++].AssociatedObjectValue).Coefficients;
172 else if (Parameters[i] is ComplexPolynomial)
173 CoefficientsZ = ((ComplexPolynomial)Arguments[i++].AssociatedObjectValue).Coefficients;*/
174 else if (Arguments[i] is IVector)
175 {
176 IVector Vector = (IVector)Arguments[i++];
177 int j, d = Vector.Dimension;
178
179 CoefficientsZ = new Complex[d];
180 for (j = 0; j < d; j++)
181 CoefficientsZ[j] = Expression.ToComplex(Vector.GetElement(j).AssociatedObjectValue);
182 }
183 else if (Arguments[i].AssociatedObjectValue is ILambdaExpression)
184 {
185 f = (ILambdaExpression)Arguments[i];
186 if (f.NrArguments != 1)
187 throw new ScriptRuntimeException("Lambda expression in calls to HalleyTopographyFractal() must be of one variable.", this);
188
189 fDef = this.Arguments[i++];
190 }
191 else
192 {
193 throw new ScriptRuntimeException("Parameter " + (i + 1).ToString() +
194 " in call to HalleyTopographyFractal has to be a vector of numbers, containing coefficients " +
195 "of the polynomial to use. Now it was of type " + Arguments[i].GetType().FullName,
196 this);
197 }
198 }
199 else
200 throw new ScriptRuntimeException("Missing coefficients or lambda expression.", this);
201
202 if (i < c && !(this.Arguments[i] is null) && Arguments[i] is ObjectVector)
203 {
204 ColorExpression = this.Arguments[i].SubExpression;
205 Palette = FractalGraph.ToPalette((ObjectVector)Arguments[i++]);
206 }
207 else
208 {
209 Palette = ColorModels.RandomLinearAnalogousHSL.CreatePalette(128, 4, out int Seed, this, Variables);
210 ColorExpression = "RandomLinearAnalogousHSL(128,4," + Seed.ToString() + ")";
211
212 if (i < c && this.Arguments[i] is null)
213 i++;
214 }
215
216 if (i < c)
217 dimx = (int)Expression.ToDouble(Arguments[i++].AssociatedObjectValue);
218 else
219 dimx = 320;
220
221 if (i < c)
222 dimy = (int)Expression.ToDouble(Arguments[i++].AssociatedObjectValue);
223 else
224 dimy = 200;
225
226 if (i < c)
227 {
228 throw new ScriptRuntimeException("Parameter mismatch in call to HalleyTopographyFractal(z,dr[,R][,Coefficients][,Palette][,dimx[,dimy]]).",
229 this);
230 }
231
232 if (dimx <= 0 || dimx > 5000 || dimy <= 0 || dimy > 5000)
233 throw new FractalImageSizeScriptException(this);
234
235 if (!(f is null))
236 {
237 return CalcHalley(rc, ic, dr, R, f, Variables, Palette, dimx, dimy, this, this.FractalZoomScript,
238 new object[] { Palette, dimx, dimy, R, fDef, ColorExpression });
239 }
240 else if (!(CoefficientsZ is null))
241 {
242 return CalcHalley(Variables, rc, ic, dr, R, CoefficientsZ, Palette, dimx, dimy,
243 this, this.FractalZoomScript,
244 new object[] { Palette, dimx, dimy, R, CoefficientsZ, ColorExpression });
245 }
246 else
247 {
248 return CalcHalley(Variables, rc, ic, dr, R, Coefficients, Palette, dimx, dimy,
249 this, this.FractalZoomScript,
250 new object[] { Palette, dimx, dimy, R, Coefficients, ColorExpression });
251 }
252 }
253
254 private string FractalZoomScript(double r, double i, double Size, object State)
255 {
256 object[] Parameters = (object[])State;
257 int DimX = (int)Parameters[1];
258 int DimY = (int)Parameters[2];
259 Complex R = (Complex)Parameters[3];
260 double[] Coefficients = Parameters[4] as double[];
261 string ColorExpression = (string)Parameters[5];
262
263 StringBuilder sb = new StringBuilder();
264
265 sb.Append("HalleyTopographyFractal((");
266 sb.Append(Expression.ToString(r));
267 sb.Append(',');
268 sb.Append(Expression.ToString(i));
269 sb.Append("),");
270 sb.Append(Expression.ToString(Size / 4));
271 sb.Append(',');
272 sb.Append(Expression.ToString(R));
273 sb.Append(',');
274
275 if (Parameters[4] is ScriptNode fDef)
276 sb.Append(fDef.SubExpression);
277 else if (Parameters[4] is Complex[] CoefficientsZ)
278 sb.Append(Expression.ToString(CoefficientsZ));
279 else
280 sb.Append(Expression.ToString(Coefficients));
281
282 if (!string.IsNullOrEmpty(ColorExpression))
283 {
284 sb.Append(',');
285 sb.Append(ColorExpression);
286 }
287
288 sb.Append(',');
289 sb.Append(DimX.ToString());
290 sb.Append(',');
291 sb.Append(DimY.ToString());
292 sb.Append(')');
293
294 return sb.ToString();
295 }
296
300 public static FractalGraph CalcHalley(Variables Variables, double rCenter, double iCenter, double rDelta, Complex R,
301 double[] Coefficients, SKColor[] Palette, int Width, int Height, ScriptNode Node,
302 FractalZoomScript FractalZoomScript, object State)
303 {
304 double RRe = R.Real;
305 double RIm = R.Imaginary;
306 double r0, i0, r1, i1;
307 double dr, di;
308 double r, i;
309 double zr, zi, zr2, zi2, zr3, zi3, zr4, zi4, zr5, zi5, zr6, zi6;
310 double aspect;
311 double Temp;
312 int x, y;
313 int n, N;
314 int index;
315 int Degree = Coefficients.Length - 1;
316
317 N = Palette.Length;
318
319 if (Degree < 3)
320 {
321 Array.Resize(ref Coefficients, 4);
322 while (Degree < 3)
323 Coefficients[++Degree] = 0;
324 }
325
326 double[] Prim = new double[Degree];
327 for (x = 1; x <= Degree; x++)
328 Prim[x - 1] = x * Coefficients[x];
329
330 double[] Bis = new double[Degree - 1];
331 for (x = 1; x < Degree; x++)
332 Bis[x - 1] = x * Prim[x];
333
334 Array.Reverse(Bis);
335 Array.Reverse(Prim);
336 Coefficients = (double[])Coefficients.Clone();
337 Array.Reverse(Coefficients);
338
339 int size = Width * Height;
340 int[] ColorIndex = new int[size];
341 double Conv = 1e-10;
342 double Div = 1e10;
343
344 rDelta *= 0.5;
345 r0 = rCenter - rDelta;
346 r1 = rCenter + rDelta;
347
348 aspect = ((double)Width) / Height;
349
350 i0 = iCenter - rDelta / aspect;
351 i1 = iCenter + rDelta / aspect;
352
353 dr = (r1 - r0) / Width;
354 di = (i1 - i0) / Height;
355
356 for (y = 0, i = i0, index = 0; y < Height; y++, i += di)
357 {
358 for (x = 0, r = r0; x < Width; x++, r += dr)
359 {
360 zr = r;
361 zi = i;
362
363 n = 0;
364 do
365 {
366 // f:
367 zr2 = zi2 = 0;
368 foreach (double C in Coefficients)
369 {
370 Temp = zr2 * zr - zi2 * zi + C;
371 zi2 = zr2 * zi + zi2 * zr;
372 zr2 = Temp;
373 }
374
375 // f':
376 zr3 = zi3 = 0;
377 foreach (double C in Prim)
378 {
379 Temp = zr3 * zr - zi3 * zi + C;
380 zi3 = zr3 * zi + zi3 * zr;
381 zr3 = Temp;
382 }
383
384 // f":
385 zr4 = zi4 = 0;
386 foreach (double C in Bis)
387 {
388 Temp = zr4 * zr - zi4 * zi + C;
389 zi4 = zr4 * zi + zi4 * zr;
390 zr4 = Temp;
391 }
392
393 // 2*f*f'
394
395 zr5 = 2 * (zr2 * zr3 - zi2 * zi3);
396 zi5 = 2 * (zr2 * zi3 + zi2 * zr3);
397
398 // 2f'^2-f*f"
399
400 zr6 = 2 * (zr3 * zr3 - zi3 * zi3) - (zr2 * zr4 - zi2 * zi4);
401 zi6 = 4 * zr3 * zi3 - (zr2 * zi4 + zr4 * zi2);
402
403 // R*2*f*f'/2f'^2-f*f"
404
405 Temp = 1.0 / (zr6 * zr6 + zi6 * zi6);
406 zr4 = (zr5 * zr6 + zi5 * zi6) * Temp;
407 zi4 = (zi5 * zr6 - zr5 * zi6) * Temp;
408
409 // R*2*f*f'/(2f'^2-f*f")
410 Temp = zr4 * RRe - zi4 * RIm;
411 zi4 = zr4 * RIm + zi4 * RRe;
412 zr4 = Temp;
413
414 zr -= zr4;
415 zi -= zi4;
416
417 Temp = Math.Sqrt(zr4 * zr4 + zi4 * zi4);
418 }
419 while ((Temp > Conv) && (Temp < Div) && (n++ < N));
420
421 if (Temp < Conv && n < N)
422 ColorIndex[index++] = n;
423 else
424 ColorIndex[index++] = N;
425 }
426 }
427
428 ColorIndex = FractalGraph.FindBoundaries(ColorIndex, Width, Height);
429
430 return new FractalGraph(Variables, FractalGraph.ToPixels(ColorIndex, Width, Height, Palette),
431 r0, i0, r1, i1, rDelta * 2, true, Node, FractalZoomScript, State);
432 }
433
437 public static FractalGraph CalcHalley(Variables Variables, double rCenter, double iCenter, double rDelta, Complex R,
438 Complex[] Coefficients, SKColor[] Palette, int Width, int Height, ScriptNode Node, FractalZoomScript FractalZoomScript,
439 object State)
440 {
441 double RRe = R.Real;
442 double RIm = R.Imaginary;
443 double r0, i0, r1, i1;
444 double dr, di;
445 double r, i;
446 double zr, zi, zr2, zi2, zr3, zi3, zr4, zi4, zr5, zi5, zr6, zi6;
447 double aspect;
448 double Temp;
449 int x, y;
450 int n, N;
451 int index;
452 int Degree = Coefficients.Length - 1;
453
454 N = Palette.Length;
455
456 if (Degree < 3)
457 {
458 Array.Resize(ref Coefficients, 4);
459 while (Degree < 3)
460 Coefficients[++Degree] = Complex.Zero;
461 }
462
463 Complex[] Prim = new Complex[Degree];
464 for (x = 1; x <= Degree; x++)
465 Prim[x - 1] = x * Coefficients[x];
466
467 Complex[] Bis = new Complex[Degree - 1];
468 for (x = 1; x < Degree; x++)
469 Bis[x - 1] = x * Prim[x];
470
471 Array.Reverse(Bis);
472 Array.Reverse(Prim);
473 Coefficients = (Complex[])Coefficients.Clone();
474 Array.Reverse(Coefficients);
475
476 int j, c = Prim.Length;
477 int c2 = c - 1;
478 double[] ReC = new double[c + 1];
479 double[] ImC = new double[c + 1];
480 double[] RePrim = new double[c];
481 double[] ImPrim = new double[c];
482 double[] ReBis = new double[c2];
483 double[] ImBis = new double[c2];
484 Complex z;
485
486 for (j = 0; j < c; j++)
487 {
488 z = Coefficients[j];
489 ReC[j] = z.Real;
490 ImC[j] = z.Imaginary;
491
492 z = Prim[j];
493 RePrim[j] = z.Real;
494 ImPrim[j] = z.Imaginary;
495
496 if (j < c2)
497 {
498 z = Bis[j];
499 ReBis[j] = z.Real;
500 ImBis[j] = z.Imaginary;
501 }
502 }
503
504 z = Coefficients[j];
505 ReC[j] = z.Real;
506 ImC[j] = z.Imaginary;
507
508 int size = Width * Height;
509 int[] ColorIndex = new int[size];
510 double Conv = 1e-10;
511 double Div = 1e10;
512
513 rDelta *= 0.5;
514 r0 = rCenter - rDelta;
515 r1 = rCenter + rDelta;
516
517 aspect = ((double)Width) / Height;
518
519 i0 = iCenter - rDelta / aspect;
520 i1 = iCenter + rDelta / aspect;
521
522 dr = (r1 - r0) / Width;
523 di = (i1 - i0) / Height;
524
525 for (y = 0, i = i0, index = 0; y < Height; y++, i += di)
526 {
527 for (x = 0, r = r0; x < Width; x++, r += dr)
528 {
529 zr = r;
530 zi = i;
531
532 n = 0;
533 do
534 {
535 // f:
536 zr2 = zi2 = 0;
537 for (j = 0; j <= c; j++)
538 {
539 Temp = zr2 * zr - zi2 * zi + ReC[j];
540 zi2 = zr2 * zi + zi2 * zr + ImC[j];
541 zr2 = Temp;
542 }
543
544 // f':
545 zr3 = zi3 = 0;
546 for (j = 0; j < c; j++)
547 {
548 Temp = zr3 * zr - zi3 * zi + RePrim[j];
549 zi3 = zr3 * zi + zi3 * zr + ImPrim[j];
550 zr3 = Temp;
551 }
552
553 // f":
554 zr4 = zi4 = 0;
555 for (j = 0; j < c2; j++)
556 {
557 Temp = zr4 * zr - zi4 * zi + ReBis[j];
558 zi4 = zr4 * zi + zi4 * zr + ImBis[j];
559 zr4 = Temp;
560 }
561
562 // 2*f*f'
563
564 zr5 = 2 * (zr2 * zr3 - zi2 * zi3);
565 zi5 = 2 * (zr2 * zi3 + zi2 * zr3);
566
567 // 2f'^2-f*f"
568
569 zr6 = 2 * (zr3 * zr3 - zi3 * zi3) - (zr2 * zr4 - zi2 * zi4);
570 zi6 = 4 * zr3 * zi3 - (zr2 * zi4 + zr4 * zi2);
571
572 // R*2*f*f'/2f'^2-f*f"
573
574 Temp = 1.0 / (zr6 * zr6 + zi6 * zi6);
575 zr4 = (zr5 * zr6 + zi5 * zi6) * Temp;
576 zi4 = (zi5 * zr6 - zr5 * zi6) * Temp;
577
578 // R*2*f*f'/(2f'^2-f*f")
579 Temp = zr4 * RRe - zi4 * RIm;
580 zi4 = zr4 * RIm + zi4 * RRe;
581 zr4 = Temp;
582
583 zr -= zr4;
584 zi -= zi4;
585
586 Temp = Math.Sqrt(zr4 * zr4 + zi4 * zi4);
587 }
588 while ((Temp > Conv) && (Temp < Div) && (n++ < N));
589
590 if (Temp < Conv && n < N)
591 ColorIndex[index++] = n;
592 else
593 ColorIndex[index++] = N;
594 }
595 }
596
597 ColorIndex = FractalGraph.FindBoundaries(ColorIndex, Width, Height);
598
599 return new FractalGraph(Variables, FractalGraph.ToPixels(ColorIndex, Width, Height, Palette),
600 r0, i0, r1, i1, rDelta * 2, true, Node, FractalZoomScript, State);
601 }
602
606 public static FractalGraph CalcHalley(double rCenter, double iCenter, double rDelta, Complex R,
607 ILambdaExpression f, Variables Variables, SKColor[] Palette, int Width, int Height,
608 ScriptNode Node, FractalZoomScript FractalZoomScript, object State)
609 {
610 double RRe = R.Real;
611 double RIm = R.Imaginary;
612 double r0, i0, r1, i1;
613 double dr, di;
614 double r, i;
615 double aspect;
616 int x, y;
617 int n, N;
618
619 N = Palette.Length;
620
621 Variables v = new Variables();
622 Variables.CopyTo(v);
623
624 string ParameterName;
625 if (!(f is IDifferentiable Differentiable) ||
626 !(Differentiable.Differentiate(ParameterName = Differentiable.DefaultVariableName, v) is ILambdaExpression fPrim))
627 {
628 throw new ScriptRuntimeException("Lambda expression not differentiable.", Node);
629 }
630
631 if (!(fPrim is IDifferentiable Differentiable2) ||
632 !(Differentiable2.Differentiate(ParameterName, v) is ILambdaExpression fBis))
633 {
634 throw new ScriptRuntimeException("Lambda expression not twice differentiable.", Node);
635 }
636
637 int size = Width * Height;
638 int[] ColorIndex = new int[size];
639 double Conv = 1e-10;
640 double Div = 1e10;
641
642 Complex[] Row;
643 Complex[] Row2;
644 Complex[] Row3;
645 Complex[] Row4;
646 int[] Offset;
647 IElement[] P = new IElement[1];
648 int j, c, x2;
649 IElement Obj, Obj2, Obj3;
650 double Mod;
651 Complex z, z2, z3;
652 Complex R2 = R * 2;
653
654 rDelta *= 0.5;
655 r0 = rCenter - rDelta;
656 r1 = rCenter + rDelta;
657
658 aspect = ((double)Width) / Height;
659
660 i0 = iCenter - rDelta / aspect;
661 i1 = iCenter + rDelta / aspect;
662
663 dr = (r1 - r0) / Width;
664 di = (i1 - i0) / Height;
665
666 for (y = 0, i = i0; y < Height; y++, i += di)
667 {
668 Row = new Complex[Width];
669 Offset = new int[Width];
670
671 c = Width;
672 for (x = 0, x2 = y * Width, r = r0; x < Width; x++, r += dr, x2++)
673 {
674 Row[x] = new Complex(r, i);
675 Offset[x] = x2;
676 }
677
678 n = 0;
679 while (n < N && c > 0)
680 {
681 n++;
682 P[0] = new ComplexVector(Row);
683 Obj = f.Evaluate(P, v);
684 Obj2 = fPrim.Evaluate(P, v);
685 Obj3 = fBis.Evaluate(P, v);
686 Row2 = Obj.AssociatedObjectValue as Complex[];
687 Row3 = Obj2.AssociatedObjectValue as Complex[];
688 Row4 = Obj3.AssociatedObjectValue as Complex[];
689
690 if (Row2 is null || Row3 is null || Row4 is null)
691 {
692 throw new ScriptRuntimeException("Lambda expression (and its first and second derivative) must be able to accept complex vectors, " +
693 "and return complex vectors of equal length. Type returned: " +
694 Obj.GetType().FullName + ", " + Obj2.GetType().FullName + " and " + Obj3.GetType().FullName,
695 Node);
696 }
697 else if (Row2.Length != c || Row3.Length != c)
698 {
699 throw new ScriptRuntimeException("Lambda expression (and its first and second derivative) must be able to accept complex vectors, " +
700 "and return complex vectors of equal length. Length returned: " +
701 Row2.Length.ToString() + ", " + Row3.Length.ToString() + " and " + Row4.Length.ToString() +
702 ". Expected: " + c.ToString(), Node);
703 }
704
705 for (x = x2 = 0; x < c; x++)
706 {
707 j = Offset[x];
708 z = Row2[x];
709 z2 = Row3[x];
710 z3 = Row4[x];
711
712 z = R2 * z * z2 / (2 * z2 * z2 - z * z3);
713 Row[x] -= z;
714
715 Mod = z.Magnitude;
716
717 if (Mod > Conv && Mod < Div)
718 {
719 if (x != x2)
720 Offset[x2] = j;
721
722 x2++;
723 }
724 else
725 {
726 if (n >= N)
727 ColorIndex[j++] = N;
728 else
729 ColorIndex[j++] = n;
730 }
731 }
732
733 if (x2 < x)
734 {
735 Array.Resize(ref Row, x2);
736 Array.Resize(ref Offset, x2);
737 c = x2;
738 }
739 }
740 }
741
742 ColorIndex = FractalGraph.FindBoundaries(ColorIndex, Width, Height);
743
744 return new FractalGraph(Variables, FractalGraph.ToPixels(ColorIndex, Width, Height, Palette),
745 r0, i0, r1, i1, rDelta * 2, true, Node, FractalZoomScript, State);
746 }
747
751 public override string FunctionName => nameof(HalleyTopographyFractal);
752 }
753}
Waher.Script.Expression
Class managing a script expression.
Definition: Expression.cs:41
Waher.Script.Expression.ToComplex
static Complex ToComplex(object Object)
Converts an object to a complex value.
Definition: Expression.cs:5228
Waher.Script.Expression.ToDouble
static double ToDouble(object Object)
Converts an object to a double value.
Definition: Expression.cs:5110
Waher.Script.Expression.ToString
static string ToString(double Value)
Converts a value to a string, that can be parsed as part of an expression.
Definition: Expression.cs:4760
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.HalleyTopographyFractal
HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients, int Start, int Length, Expression Expression)
TODO
Definition: HalleyTopographyFractal.cs:78
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.HalleyTopographyFractal
HalleyTopographyFractal(ScriptNode z, ScriptNode dr, int Start, int Length, Expression Expression)
TODO
Definition: HalleyTopographyFractal.cs:98
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.HalleyTopographyFractal
HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients, ScriptNode Palette, ScriptNode DimX, ScriptNode DimY, int Start, int Length, Expression Expression)
TODO
Definition: HalleyTopographyFractal.cs:45
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.Evaluate
override IElement Evaluate(IElement[] Arguments, Variables Variables)
TODO
Definition: HalleyTopographyFractal.cs:118
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.HalleyTopographyFractal
HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients, ScriptNode Palette, ScriptNode DimX, int Start, int Length, Expression Expression)
TODO
Definition: HalleyTopographyFractal.cs:56
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.CalcHalley
static FractalGraph CalcHalley(Variables Variables, double rCenter, double iCenter, double rDelta, Complex R, double[] Coefficients, SKColor[] Palette, int Width, int Height, ScriptNode Node, FractalZoomScript FractalZoomScript, object State)
TODO
Definition: HalleyTopographyFractal.cs:300
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.HalleyTopographyFractal
HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, ScriptNode Coefficients, ScriptNode Palette, int Start, int Length, Expression Expression)
TODO
Definition: HalleyTopographyFractal.cs:67
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.CalcHalley
static FractalGraph CalcHalley(Variables Variables, double rCenter, double iCenter, double rDelta, Complex R, Complex[] Coefficients, SKColor[] Palette, int Width, int Height, ScriptNode Node, FractalZoomScript FractalZoomScript, object State)
TODO
Definition: HalleyTopographyFractal.cs:437
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.CalcHalley
static FractalGraph CalcHalley(double rCenter, double iCenter, double rDelta, Complex R, ILambdaExpression f, Variables Variables, SKColor[] Palette, int Width, int Height, ScriptNode Node, FractalZoomScript FractalZoomScript, object State)
TODO
Definition: HalleyTopographyFractal.cs:606
Waher.Script.Fractals.ComplexFractals.HalleyTopographyFractal.HalleyTopographyFractal
HalleyTopographyFractal(ScriptNode z, ScriptNode dr, ScriptNode R, int Start, int Length, Expression Expression)
TODO
Definition: HalleyTopographyFractal.cs:89
Waher.Script.Fractals.Exceptions.FractalImageSizeScriptException
Exception thrown if an image with invalid size is requested.
Definition: OperandOutOfBoundsScriptException.cs:10
Waher.Script.Fractals.FractalGraph
Defines a clickable fractal graph in the complex plane.
Definition: FractalGraph.cs:23
Waher.Script.Fractals.FractalGraph.ToPixels
static PixelInformation ToPixels(double[] ColorIndex, int Width, int Height, SKColor[] Palette)
TODO
Definition: FractalGraph.cs:1127
Waher.Script.Fractals.FractalGraph.ToPalette
static SKColor[] ToPalette(ObjectVector Vector)
TODO
Definition: FractalGraph.cs:110
Waher.Script.Fractals.FractalGraph.FindBoundaries
static double[] FindBoundaries(double[] ColorIndex, int Width, int Height)
TODO
Definition: FractalGraph.cs:380
Waher.Script.Model.FunctionMultiVariate
Base class for multivariate funcions.
Definition: FunctionMultiVariate.cs:17
Waher.Script.Model.FunctionMultiVariate.Arguments
ScriptNode[] Arguments
Function arguments.
Definition: FunctionMultiVariate.cs:185
Waher.Script.Model.ScriptNode
Base class for all nodes in a parsed script tree.
Definition: ScriptNode.cs:69
Waher.Script.Model.ScriptNode.Length
int Length
Length of expression covered by node.
Definition: ScriptNode.cs:101
Waher.Script.Model.ScriptNode.ToString
override string ToString()
Definition: ScriptNode.cs:359
Waher.Script.Model.ScriptNode.Expression
Expression Expression
Expression of which the node is a part.
Definition: ScriptNode.cs:177
Waher.Script.Model.ScriptNode.Start
int Start
Start position in script expression.
Definition: ScriptNode.cs:92
Waher.Script.Variables
Collection of variables.
Definition: Variables.cs:25
Waher.Script.Variables.CopyTo
void CopyTo(Variables Variables)
Copies available variables to another variable collection.
Definition: Variables.cs:334
Waher.Script.Abstraction.Elements.IElement
Basic interface for all types of elements.
Definition: IElement.cs:21
Waher.Script.Abstraction.Elements.IElement.AssociatedObjectValue
object AssociatedObjectValue
Associated object value.
Definition: IElement.cs:34
Waher.Script.Abstraction.Elements.IVector
Basic interface for vectors.
Definition: IVector.cs:9
Waher.Script.Abstraction.Elements.IVector.Dimension
int Dimension
Dimension of vector.
Definition: IVector.cs:14
Waher.Script.Abstraction.Elements.IVector.GetElement
IElement GetElement(int Index)
Gets an element of the vector.
Waher.Script.Model.IDifferentiable
Base interface for lambda expressions.
Definition: IDifferentiable.cs:9
Waher.Script.Model.ILambdaExpression
Base interface for lambda expressions.
Definition: ILambdaExpression.cs:11
Waher.Script.Model.ILambdaExpression.Evaluate
IElement Evaluate(IElement[] Arguments, Variables Variables)
Evaluates the lambda expression.
Waher.Script.Fractals.FractalZoomScript
delegate string FractalZoomScript(double r, double i, double Size, object State)
Generates new script when zoomed.
Waher.Script.Model.ArgumentType
ArgumentType
Type of parameter used in a function definition or a lambda definition.
Definition: IFunction.cs:9