VTK
vtkFunctionParser.h
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1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkFunctionParser.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
49 #ifndef vtkFunctionParser_h
50 #define vtkFunctionParser_h
51 
52 #include "vtkCommonMiscModule.h" // For export macro
53 #include "vtkObject.h"
54 #include "vtkTuple.h" // needed for vtkTuple
55 #include <vector> // needed for vector
56 #include <string> // needed for string.
57 
58 #define VTK_PARSER_IMMEDIATE 1
59 #define VTK_PARSER_UNARY_MINUS 2
60 #define VTK_PARSER_UNARY_PLUS 3
61 
62 // supported math functions
63 #define VTK_PARSER_ADD 4
64 #define VTK_PARSER_SUBTRACT 5
65 #define VTK_PARSER_MULTIPLY 6
66 #define VTK_PARSER_DIVIDE 7
67 #define VTK_PARSER_POWER 8
68 #define VTK_PARSER_ABSOLUTE_VALUE 9
69 #define VTK_PARSER_EXPONENT 10
70 #define VTK_PARSER_CEILING 11
71 #define VTK_PARSER_FLOOR 12
72 #define VTK_PARSER_LOGARITHM 13
73 #define VTK_PARSER_LOGARITHME 14
74 #define VTK_PARSER_LOGARITHM10 15
75 #define VTK_PARSER_SQUARE_ROOT 16
76 #define VTK_PARSER_SINE 17
77 #define VTK_PARSER_COSINE 18
78 #define VTK_PARSER_TANGENT 19
79 #define VTK_PARSER_ARCSINE 20
80 #define VTK_PARSER_ARCCOSINE 21
81 #define VTK_PARSER_ARCTANGENT 22
82 #define VTK_PARSER_HYPERBOLIC_SINE 23
83 #define VTK_PARSER_HYPERBOLIC_COSINE 24
84 #define VTK_PARSER_HYPERBOLIC_TANGENT 25
85 #define VTK_PARSER_MIN 26
86 #define VTK_PARSER_MAX 27
87 #define VTK_PARSER_SIGN 29
88 
89 // functions involving vectors
90 #define VTK_PARSER_CROSS 28
91 #define VTK_PARSER_VECTOR_UNARY_MINUS 30
92 #define VTK_PARSER_VECTOR_UNARY_PLUS 31
93 #define VTK_PARSER_DOT_PRODUCT 32
94 #define VTK_PARSER_VECTOR_ADD 33
95 #define VTK_PARSER_VECTOR_SUBTRACT 34
96 #define VTK_PARSER_SCALAR_TIMES_VECTOR 35
97 #define VTK_PARSER_VECTOR_TIMES_SCALAR 36
98 #define VTK_PARSER_VECTOR_OVER_SCALAR 37
99 #define VTK_PARSER_MAGNITUDE 38
100 #define VTK_PARSER_NORMALIZE 39
101 
102 // constants involving vectors
103 #define VTK_PARSER_IHAT 40
104 #define VTK_PARSER_JHAT 41
105 #define VTK_PARSER_KHAT 42
106 
107 // code for if(bool, trueval, falseval) resulting in a scalar
108 #define VTK_PARSER_IF 43
109 
110 // code for if(bool, truevec, falsevec) resulting in a vector
111 #define VTK_PARSER_VECTOR_IF 44
112 
113 // codes for boolean expressions
114 #define VTK_PARSER_LESS_THAN 45
115 
116 // codes for boolean expressions
117 #define VTK_PARSER_GREATER_THAN 46
118 
119 // codes for boolean expressions
120 #define VTK_PARSER_EQUAL_TO 47
121 
122 // codes for boolean expressions
123 #define VTK_PARSER_AND 48
124 
125 // codes for boolean expressions
126 #define VTK_PARSER_OR 49
127 
128 // codes for scalar variables come before those for vectors. Do not define
129 // values for VTK_PARSER_BEGIN_VARIABLES+1, VTK_PARSER_BEGIN_VARIABLES+2, ...,
130 // because they are used to look up variables numbered 1, 2, ...
131 #define VTK_PARSER_BEGIN_VARIABLES 50
132 
133 // the value that is retuned as a result if there is an error
134 #define VTK_PARSER_ERROR_RESULT VTK_FLOAT_MAX
135 
136 class VTKCOMMONMISC_EXPORT vtkFunctionParser : public vtkObject
137 {
138 public:
140  vtkTypeMacro(vtkFunctionParser, vtkObject);
141  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
142 
146  vtkMTimeType GetMTime() VTK_OVERRIDE;
147 
149 
152  void SetFunction(const char *function);
153  vtkGetStringMacro(Function);
155 
160  int IsScalarResult();
161 
166  int IsVectorResult();
167 
171  double GetScalarResult();
172 
174 
177  double* GetVectorResult();
178  void GetVectorResult(double result[3]) {
179  double *r = this->GetVectorResult();
180  result[0] = r[0]; result[1] = r[1]; result[2] = r[2]; };
182 
184 
190  void SetScalarVariableValue(const char* variableName, double value);
191  void SetScalarVariableValue(int i, double value);
193 
195 
198  double GetScalarVariableValue(const char* variableName);
199  double GetScalarVariableValue(int i);
201 
203 
209  void SetVectorVariableValue(const char* variableName, double xValue,
210  double yValue, double zValue);
211  void SetVectorVariableValue(const char* variableName,
212  const double values[3]) {
213  this->SetVectorVariableValue(variableName,values[0],values[1],values[2]);};
214  void SetVectorVariableValue(int i, double xValue, double yValue,
215  double zValue);
216  void SetVectorVariableValue(int i, const double values[3]) {
217  this->SetVectorVariableValue(i,values[0],values[1],values[2]);};
219 
221 
224  double* GetVectorVariableValue(const char* variableName);
225  void GetVectorVariableValue(const char* variableName, double value[3]) {
226  double *r = this->GetVectorVariableValue(variableName);
227  value[0] = r[0]; value[1] = r[1]; value[2] = r[2]; };
228  double* GetVectorVariableValue(int i);
229  void GetVectorVariableValue(int i, double value[3]) {
230  double *r = this->GetVectorVariableValue(i);
231  value[0] = r[0]; value[1] = r[1]; value[2] = r[2]; };
233 
238  { return static_cast<int>(this->ScalarVariableNames.size()); }
239 
244  { return static_cast<int>(this->VectorVariableNames.size()); }
245 
249  const char* GetScalarVariableName(int i);
250 
254  const char* GetVectorVariableName(int i);
255 
257 
263  bool GetScalarVariableNeeded(const char* variableName);
265 
267 
273  bool GetVectorVariableNeeded(const char* variableName);
275 
280 
285 
290 
292 
298  vtkSetMacro(ReplaceInvalidValues,int);
299  vtkGetMacro(ReplaceInvalidValues,int);
300  vtkBooleanMacro(ReplaceInvalidValues,int);
301  vtkSetMacro(ReplacementValue,double);
302  vtkGetMacro(ReplacementValue,double);
304 
308  void CheckExpression(int &pos, char **error);
309 
314 
315 protected:
317  ~vtkFunctionParser() VTK_OVERRIDE;
318 
319  int Parse();
320 
324  bool Evaluate();
325 
326  int CheckSyntax();
327 
328  void CopyParseError(int &position, char **error);
329 
330  void RemoveSpaces();
331  char* RemoveSpacesFrom(const char* variableName);
332  int OperatorWithinVariable(int idx);
333 
334  int BuildInternalFunctionStructure();
335  void BuildInternalSubstringStructure(int beginIndex, int endIndex);
336  void AddInternalByte(unsigned char newByte);
337 
338  int IsSubstringCompletelyEnclosed(int beginIndex, int endIndex);
339  int FindEndOfMathFunction(int beginIndex);
340  int FindEndOfMathConstant(int beginIndex);
341 
342  int IsVariableName(int currentIndex);
343  int IsElementaryOperator(int op);
344 
345  int GetMathFunctionNumber(int currentIndex);
346  int GetMathFunctionNumberByCheckingParenthesis( int currentIndex );
347  int GetMathFunctionStringLength(int mathFunctionNumber);
348  int GetMathConstantNumber(int currentIndex);
349  int GetMathConstantStringLength(int mathConstantNumber);
350  unsigned char GetElementaryOperatorNumber(char op);
351  unsigned char GetOperandNumber(int currentIndex);
352  int GetVariableNameLength(int variableNumber);
353 
354  int DisambiguateOperators();
355 
360  void UpdateNeededVariables();
361 
362  vtkSetStringMacro(ParseError);
363 
364  int FindPositionInOriginalFunction(const int& pos);
365 
366  char* Function;
367  char* FunctionWithSpaces;
368 
369  int FunctionLength;
370  std::vector<std::string> ScalarVariableNames;
371  std::vector<std::string> VectorVariableNames;
372  std::vector<double> ScalarVariableValues;
373  std::vector<vtkTuple<double, 3> > VectorVariableValues;
374  std::vector<bool> ScalarVariableNeeded;
375  std::vector<bool> VectorVariableNeeded;
376 
377  unsigned char *ByteCode;
378  int ByteCodeSize;
379  double *Immediates;
380  int ImmediatesSize;
381  double *Stack;
382  int StackSize;
383  int StackPointer;
384 
385  vtkTimeStamp FunctionMTime;
386  vtkTimeStamp ParseMTime;
387  vtkTimeStamp VariableMTime;
388  vtkTimeStamp EvaluateMTime;
389  vtkTimeStamp CheckMTime;
390 
391  int ReplaceInvalidValues;
392  double ReplacementValue;
393 
394  int ParseErrorPositon;
395  char* ParseError;
396 
397 private:
398  vtkFunctionParser(const vtkFunctionParser&) VTK_DELETE_FUNCTION;
399  void operator=(const vtkFunctionParser&) VTK_DELETE_FUNCTION;
400 };
401 
402 #endif
vtkFunctionParser::GetScalarVariableValue
double GetScalarVariableValue(int i)
vtkX3D::vector
@ vector
Definition: vtkX3D.h:237
vtkX3D::function
@ function
Definition: vtkX3D.h:249
vtkFunctionParser::GetVectorVariableNeeded
bool GetVectorVariableNeeded(const char *variableName)
vtkFunctionParser::GetVectorVariableName
const char * GetVectorVariableName(int i)
Get the ith vector variable name.
vtkX3D::value
@ value
Definition: vtkX3D.h:220
vtkFunctionParser::SetVectorVariableValue
void SetVectorVariableValue(int i, const double values[3])
Definition: vtkFunctionParser.h:216
vtkFunctionParser::vtkFunctionParser
vtkFunctionParser()
vtkTimeStamp
record modification and/or execution time
Definition: vtkTimeStamp.h:36
vtkFunctionParser::InvalidateFunction
void InvalidateFunction()
Allow the user to force the function to be re-parsed.
vtkObject
abstract base class for most VTK objects
Definition: vtkObject.h:60
vtkFunctionParser::SetVectorVariableValue
void SetVectorVariableValue(int i, double xValue, double yValue, double zValue)
vtkFunctionParser::GetScalarVariableNeeded
bool GetScalarVariableNeeded(int i)
Returns whether a scalar variable is needed for the function evaluation.
vtkFunctionParser::RemoveScalarVariables
void RemoveScalarVariables()
Remove all the scalar variables.
vtkFunctionParser::SetScalarVariableValue
void SetScalarVariableValue(int i, double value)
vtkFunctionParser::New
static vtkFunctionParser * New()
vtkFunctionParser::GetScalarVariableNeeded
bool GetScalarVariableNeeded(const char *variableName)
vtkMTimeType
vtkTypeUInt64 vtkMTimeType
Definition: vtkType.h:248
vtkX3D::position
@ position
Definition: vtkX3D.h:261
vtkFunctionParser::SetVectorVariableValue
void SetVectorVariableValue(const char *variableName, const double values[3])
Definition: vtkFunctionParser.h:211
vtkFunctionParser::GetVectorVariableValue
void GetVectorVariableValue(const char *variableName, double value[3])
Definition: vtkFunctionParser.h:225
vtkFunctionParser::CheckExpression
void CheckExpression(int &pos, char **error)
Check the validity of the function expression.
vtkIndent
a simple class to control print indentation
Definition: vtkIndent.h:40
vtkFunctionParser::SetScalarVariableValue
void SetScalarVariableValue(const char *variableName, double value)
Set the value of a scalar variable.
vtkFunctionParser::GetVectorVariableNeeded
bool GetVectorVariableNeeded(int i)
Returns whether a vector variable is needed for the function evaluation.
vtkFunctionParser::GetScalarVariableValue
double GetScalarVariableValue(const char *variableName)
Get the value of a scalar variable.
vtkGetStringMacro
vtkGetStringMacro(ExtensionsString)
Returns a string listing all available extensions.
vtkObject.h
vtkBooleanMacro
vtkBooleanMacro(IgnoreDriverBugs, bool)
Updates the extensions string.
vtkSetMacro
vtkSetMacro(IgnoreDriverBugs, bool)
Updates the extensions string.
vtkFunctionParser::GetMTime
vtkMTimeType GetMTime() override
Return parser's MTime.
vtkTuple.h
vtkFunctionParser::~vtkFunctionParser
~vtkFunctionParser() override
vtkFunctionParser::GetVectorVariableValue
void GetVectorVariableValue(int i, double value[3])
Definition: vtkFunctionParser.h:229
vtkFunctionParser::GetVectorVariableValue
double * GetVectorVariableValue(int i)
vtkFunctionParser
Parse and evaluate a mathematical expression.
Definition: vtkFunctionParser.h:137
vtkFunctionParser::GetScalarVariableName
const char * GetScalarVariableName(int i)
Get the ith scalar variable name.
vtkFunctionParser::RemoveVectorVariables
void RemoveVectorVariables()
Remove all the vector variables.
vtkFunctionParser::GetNumberOfScalarVariables
int GetNumberOfScalarVariables()
Get the number of scalar variables.
Definition: vtkFunctionParser.h:237
vtkFunctionParser::PrintSelf
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
vtkTuple
templated base type for containers of constant size.
Definition: vtkTuple.h:36
vtkFunctionParser::GetNumberOfVectorVariables
int GetNumberOfVectorVariables()
Get the number of vector variables.
Definition: vtkFunctionParser.h:243
vtkFunctionParser::SetVectorVariableValue
void SetVectorVariableValue(const char *variableName, double xValue, double yValue, double zValue)
Set the value of a vector variable.
vtkFunctionParser::GetVectorVariableValue
double * GetVectorVariableValue(const char *variableName)
Get the value of a vector variable.
vtkFunctionParser::RemoveAllVariables
void RemoveAllVariables()
Remove all the current variables.