Common/vtkFunctionParser.h
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00026 #ifndef __vtkFunctionParser_h
00027 #define __vtkFunctionParser_h
00028
00029 #include "vtkObject.h"
00030
00031 #define VTK_PARSER_IMMEDIATE 1
00032 #define VTK_PARSER_UNARY_MINUS 2
00033
00034
00035 #define VTK_PARSER_ADD 3
00036 #define VTK_PARSER_SUBTRACT 4
00037 #define VTK_PARSER_MULTIPLY 5
00038 #define VTK_PARSER_DIVIDE 6
00039 #define VTK_PARSER_POWER 7
00040 #define VTK_PARSER_ABSOLUTE_VALUE 8
00041 #define VTK_PARSER_EXPONENT 9
00042 #define VTK_PARSER_CEILING 10
00043 #define VTK_PARSER_FLOOR 11
00044 #define VTK_PARSER_LOGARITHM 12
00045 #define VTK_PARSER_SQUARE_ROOT 13
00046 #define VTK_PARSER_SINE 14
00047 #define VTK_PARSER_COSINE 15
00048 #define VTK_PARSER_TANGENT 16
00049 #define VTK_PARSER_ARCSINE 17
00050 #define VTK_PARSER_ARCCOSINE 18
00051 #define VTK_PARSER_ARCTANGENT 19
00052 #define VTK_PARSER_HYPERBOLIC_SINE 20
00053 #define VTK_PARSER_HYPERBOLIC_COSINE 21
00054 #define VTK_PARSER_HYPERBOLIC_TANGENT 22
00055 #define VTK_PARSER_MIN 23
00056 #define VTK_PARSER_MAX 24
00057 #define VTK_PARSER_SIGN 25
00058
00059
00060 #define VTK_PARSER_VECTOR_UNARY_MINUS 26
00061 #define VTK_PARSER_DOT_PRODUCT 27
00062 #define VTK_PARSER_VECTOR_ADD 28
00063 #define VTK_PARSER_VECTOR_SUBTRACT 29
00064 #define VTK_PARSER_SCALAR_TIMES_VECTOR 30
00065 #define VTK_PARSER_VECTOR_TIMES_SCALAR 31
00066 #define VTK_PARSER_MAGNITUDE 32
00067 #define VTK_PARSER_NORMALIZE 33
00068
00069
00070 #define VTK_PARSER_IHAT 34
00071 #define VTK_PARSER_JHAT 35
00072 #define VTK_PARSER_KHAT 36
00073
00074
00075 #define VTK_PARSER_BEGIN_VARIABLES 37
00076
00077
00078 #define VTK_PARSER_ERROR_RESULT VTK_LARGE_FLOAT
00079
00080 class VTK_COMMON_EXPORT vtkFunctionParser : public vtkObject
00081 {
00082 public:
00083 static vtkFunctionParser *New();
00084 vtkTypeRevisionMacro(vtkFunctionParser, vtkObject);
00085 void PrintSelf(ostream& os, vtkIndent indent);
00086
00088
00089 void SetFunction(const char *function);
00090 vtkGetStringMacro(Function);
00092
00095 int IsScalarResult();
00096
00099 int IsVectorResult();
00100
00102 double GetScalarResult();
00103
00105
00106 double* GetVectorResult();
00107 void GetVectorResult(double result[3]) {
00108 double *r = this->GetVectorResult();
00109 result[0] = r[0]; result[1] = r[1]; result[2] = r[2]; };
00111
00113
00117 void SetScalarVariableValue(const char* variableName, double value);
00118 void SetScalarVariableValue(int i, double value);
00120
00122
00123 double GetScalarVariableValue(const char* variableName);
00124 double GetScalarVariableValue(int i);
00126
00128
00132 void SetVectorVariableValue(const char* variableName, double xValue,
00133 double yValue, double zValue);
00134 void SetVectorVariableValue(const char* variableName,
00135 const double values[3]) {
00136 this->SetVectorVariableValue(variableName,values[0],values[1],values[2]);};
00137 void SetVectorVariableValue(int i, double xValue, double yValue,
00138 double zValue);
00139 void SetVectorVariableValue(int i, const double values[3]) {
00140 this->SetVectorVariableValue(i,values[0],values[1],values[2]);};
00142
00144
00145 double* GetVectorVariableValue(const char* variableName);
00146 void GetVectorVariableValue(const char* variableName, double value[3]) {
00147 double *r = this->GetVectorVariableValue(variableName);
00148 value[0] = r[0]; value[1] = r[1]; value[2] = r[2]; };
00149 double* GetVectorVariableValue(int i);
00150 void GetVectorVariableValue(int i, double value[3]) {
00151 double *r = this->GetVectorVariableValue(i);
00152 value[0] = r[0]; value[1] = r[1]; value[2] = r[2]; };
00154
00156
00157 vtkGetMacro(NumberOfScalarVariables,int);
00159
00161
00162 vtkGetMacro(NumberOfVectorVariables,int);
00164
00166 char* GetScalarVariableName(int i);
00167
00169 char* GetVectorVariableName(int i);
00170
00172 void RemoveAllVariables();
00173
00174 protected:
00175 vtkFunctionParser();
00176 ~vtkFunctionParser();
00177
00178 int Parse();
00179 void Evaluate();
00180
00181 int CheckSyntax();
00182 void RemoveSpaces();
00183 char* RemoveSpacesFrom(const char* variableName);
00184
00185 int BuildInternalFunctionStructure();
00186 void BuildInternalSubstringStructure(int beginIndex, int endIndex);
00187 void AddInternalByte(unsigned char newByte);
00188
00189 int IsSubstringCompletelyEnclosed(int beginIndex, int endIndex);
00190 int FindEndOfMathFunction(int beginIndex);
00191 int FindEndOfMathConstant(int beginIndex);
00192
00193 int IsVariableName(int currentIndex);
00194 int IsElementaryOperator(int op);
00195
00196 int GetMathFunctionNumber(int currentIndex);
00197 int GetMathFunctionStringLength(int mathFunctionNumber);
00198 int GetMathConstantNumber(int currentIndex);
00199 int GetMathConstantStringLength(int mathConstantNumber);
00200 int GetElementaryOperatorNumber(char op);
00201 int GetOperandNumber(int currentIndex);
00202 int GetVariableNameLength(int variableNumber);
00203
00204 int DisambiguateOperators();
00205
00206 char* Function;
00207 int FunctionLength;
00208 int NumberOfScalarVariables;
00209 int NumberOfVectorVariables;
00210 char** ScalarVariableNames;
00211 char** VectorVariableNames;
00212 double* ScalarVariableValues;
00213 double** VectorVariableValues;
00214 unsigned char *ByteCode;
00215 int ByteCodeSize;
00216 double *Immediates;
00217 int ImmediatesSize;
00218 double *Stack;
00219 int StackSize;
00220 int StackPointer;
00221
00222 vtkTimeStamp FunctionMTime;
00223 vtkTimeStamp ParseMTime;
00224 vtkTimeStamp VariableMTime;
00225 vtkTimeStamp EvaluateMTime;
00226 private:
00227 vtkFunctionParser(const vtkFunctionParser&);
00228 void operator=(const vtkFunctionParser&);
00229 };
00230
00231 #endif