146 lines
3.4 KiB
C++
146 lines
3.4 KiB
C++
/*
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* LLCalc.cpp
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* SecondLife
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*
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* Created by Aimee Walton on 28/09/2008.
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* Copyright 2008 Aimee Walton.
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*
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*/
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#include "linden_common.h"
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#include "llcalc.h"
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#include "llcalcparser.h"
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#include "llmath.h"
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// Variable names for use in the build floater
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const char* LLCalc::X_POS = "PX";
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const char* LLCalc::Y_POS = "PY";
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const char* LLCalc::Z_POS = "PZ";
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const char* LLCalc::X_SCALE = "SX";
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const char* LLCalc::Y_SCALE = "SY";
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const char* LLCalc::Z_SCALE = "SZ";
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const char* LLCalc::X_ROT = "RX";
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const char* LLCalc::Y_ROT = "RY";
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const char* LLCalc::Z_ROT = "RZ";
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const char* LLCalc::HOLLOW = "HLW";
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const char* LLCalc::CUT_BEGIN = "CB";
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const char* LLCalc::CUT_END = "CE";
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const char* LLCalc::PATH_BEGIN = "PB";
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const char* LLCalc::PATH_END = "PE";
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const char* LLCalc::TWIST_BEGIN = "TB";
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const char* LLCalc::TWIST_END = "TE";
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const char* LLCalc::X_SHEAR = "SHX";
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const char* LLCalc::Y_SHEAR = "SHY";
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const char* LLCalc::X_TAPER = "TPX";
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const char* LLCalc::Y_TAPER = "TPY";
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const char* LLCalc::RADIUS_OFFSET = "ROF";
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const char* LLCalc::REVOLUTIONS = "REV";
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const char* LLCalc::SKEW = "SKW";
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const char* LLCalc::X_HOLE = "HLX";
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const char* LLCalc::Y_HOLE = "HLY";
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const char* LLCalc::TEX_U_SCALE = "TSU";
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const char* LLCalc::TEX_V_SCALE = "TSV";
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const char* LLCalc::TEX_U_OFFSET = "TOU";
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const char* LLCalc::TEX_V_OFFSET = "TOV";
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const char* LLCalc::TEX_ROTATION = "TROT";
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const char* LLCalc::TEX_TRANSPARENCY = "TRNS";
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const char* LLCalc::TEX_GLOW = "GLOW";
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LLCalc* LLCalc::sInstance = NULL;
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LLCalc::LLCalc() : mLastErrorPos(0)
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{
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// Init table of constants
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mConstants["PI"] = F_PI;
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mConstants["TWO_PI"] = F_TWO_PI;
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mConstants["PI_BY_TWO"] = F_PI_BY_TWO;
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mConstants["SQRT_TWO_PI"] = F_SQRT_TWO_PI;
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mConstants["SQRT2"] = F_SQRT2;
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mConstants["SQRT3"] = F_SQRT3;
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mConstants["DEG_TO_RAD"] = DEG_TO_RAD;
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mConstants["RAD_TO_DEG"] = RAD_TO_DEG;
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mConstants["GRAVITY"] = GRAVITY;
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}
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LLCalc::~LLCalc()
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{
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}
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//static
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void LLCalc::cleanUp()
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{
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delete sInstance;
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sInstance = NULL;
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}
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//static
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LLCalc* LLCalc::getInstance()
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{
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if (!sInstance) sInstance = new LLCalc();
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return sInstance;
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}
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void LLCalc::setVar(const std::string& name, const F32& value)
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{
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mVariables[name] = value;
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}
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void LLCalc::clearVar(const std::string& name)
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{
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mVariables.erase(name);
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}
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void LLCalc::clearAllVariables()
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{
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mVariables.clear();
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}
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/*
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void LLCalc::updateVariables(LLSD& vars)
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{
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LLSD::map_iterator cIt = vars.beginMap();
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for(; cIt != vars.endMap(); cIt++)
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{
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setVar(cIt->first, (F32)(LLSD::Real)cIt->second);
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}
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}
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*/
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bool LLCalc::evalString(const std::string& expression, F32& result)
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{
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std::string expr_upper = expression;
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LLStringUtil::toUpper(expr_upper);
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LLCalcParser calc(result, &mConstants, &mVariables);
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mLastErrorPos = 0;
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std::string::iterator start = expr_upper.begin();
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parse_info<std::string::iterator> info;
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try
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{
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info = parse(start, expr_upper.end(), calc, space_p);
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lldebugs << "Math expression: " << expression << " = " << result << llendl;
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}
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catch(parser_error<std::string, std::string::iterator> &e)
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{
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mLastErrorPos = e.where - expr_upper.begin();
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llinfos << "Calc parser exception: " << e.descriptor << " at " << mLastErrorPos << " in expression: " << expression << llendl;
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return false;
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}
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if (!info.full)
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{
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mLastErrorPos = info.stop - expr_upper.begin();
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llinfos << "Unhandled syntax error at " << mLastErrorPos << " in expression: " << expression << llendl;
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return false;
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}
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return true;
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}
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