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Diffstat (limited to 'indra/llmath/llcalc.cpp')
| -rw-r--r-- | indra/llmath/llcalc.cpp | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/indra/llmath/llcalc.cpp b/indra/llmath/llcalc.cpp new file mode 100644 index 0000000000..1b2d609b67 --- /dev/null +++ b/indra/llmath/llcalc.cpp @@ -0,0 +1,162 @@ +/* + * LLCalc.cpp + * Copyright 2008 Aimee Walton. + * $LicenseInfo:firstyear=2008&license=viewerlgpl$ + * Second Life Viewer Source Code + * Copyright (C) 2008, Linden Research, Inc. + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; + * version 2.1 of the License only. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * $/LicenseInfo$ + * + */ + +#include "linden_common.h" + +#include "llcalc.h" + +#include "llcalcparser.h" +#include "llmath.h" + + +// Variable names for use in the build floater +const char* LLCalc::X_POS = "PX"; +const char* LLCalc::Y_POS = "PY"; +const char* LLCalc::Z_POS = "PZ"; +const char* LLCalc::X_SCALE = "SX"; +const char* LLCalc::Y_SCALE = "SY"; +const char* LLCalc::Z_SCALE = "SZ"; +const char* LLCalc::X_ROT = "RX"; +const char* LLCalc::Y_ROT = "RY"; +const char* LLCalc::Z_ROT = "RZ"; +const char* LLCalc::HOLLOW = "HLW"; +const char* LLCalc::CUT_BEGIN = "CB"; +const char* LLCalc::CUT_END = "CE"; +const char* LLCalc::PATH_BEGIN = "PB"; +const char* LLCalc::PATH_END = "PE"; +const char* LLCalc::TWIST_BEGIN = "TB"; +const char* LLCalc::TWIST_END = "TE"; +const char* LLCalc::X_SHEAR = "SHX"; +const char* LLCalc::Y_SHEAR = "SHY"; +const char* LLCalc::X_TAPER = "TPX"; +const char* LLCalc::Y_TAPER = "TPY"; +const char* LLCalc::RADIUS_OFFSET = "ROF"; +const char* LLCalc::REVOLUTIONS = "REV"; +const char* LLCalc::SKEW = "SKW"; +const char* LLCalc::X_HOLE = "HLX"; +const char* LLCalc::Y_HOLE = "HLY"; +const char* LLCalc::TEX_U_SCALE = "TSU"; +const char* LLCalc::TEX_V_SCALE = "TSV"; +const char* LLCalc::TEX_U_OFFSET = "TOU"; +const char* LLCalc::TEX_V_OFFSET = "TOV"; +const char* LLCalc::TEX_ROTATION = "TROT"; +const char* LLCalc::TEX_TRANSPARENCY = "TRNS"; +const char* LLCalc::TEX_GLOW = "GLOW"; + + +LLCalc* LLCalc::sInstance = NULL; + +LLCalc::LLCalc() : mLastErrorPos(0) +{ + // Init table of constants + mConstants["PI"] = F_PI; + mConstants["TWO_PI"] = F_TWO_PI; + mConstants["PI_BY_TWO"] = F_PI_BY_TWO; + mConstants["SQRT_TWO_PI"] = F_SQRT_TWO_PI; + mConstants["SQRT2"] = F_SQRT2; + mConstants["SQRT3"] = F_SQRT3; + mConstants["DEG_TO_RAD"] = DEG_TO_RAD; + mConstants["RAD_TO_DEG"] = RAD_TO_DEG; + mConstants["GRAVITY"] = GRAVITY; +} + +LLCalc::~LLCalc() +{ +} + +//static +void LLCalc::cleanUp() +{ + delete sInstance; + sInstance = NULL; +} + +//static +LLCalc* LLCalc::getInstance() +{ + if (!sInstance) sInstance = new LLCalc(); + return sInstance; +} + +void LLCalc::setVar(const std::string& name, const F32& value) +{ + mVariables[name] = value; +} + +void LLCalc::clearVar(const std::string& name) +{ + mVariables.erase(name); +} + +void LLCalc::clearAllVariables() +{ + mVariables.clear(); +} + +/* +void LLCalc::updateVariables(LLSD& vars) +{ + LLSD::map_iterator cIt = vars.beginMap(); + for(; cIt != vars.endMap(); cIt++) + { + setVar(cIt->first, (F32)(LLSD::Real)cIt->second); + } +} +*/ + +bool LLCalc::evalString(const std::string& expression, F32& result) +{ + std::string expr_upper = expression; + LLStringUtil::toUpper(expr_upper); + + LLCalcParser calc(result, &mConstants, &mVariables); + + mLastErrorPos = 0; + std::string::iterator start = expr_upper.begin(); + parse_info<std::string::iterator> info; + + try + { + info = parse(start, expr_upper.end(), calc, space_p); + lldebugs << "Math expression: " << expression << " = " << result << llendl; + } + catch(parser_error<std::string, std::string::iterator> &e) + { + mLastErrorPos = e.where - expr_upper.begin(); + + llinfos << "Calc parser exception: " << e.descriptor << " at " << mLastErrorPos << " in expression: " << expression << llendl; + return false; + } + + if (!info.full) + { + mLastErrorPos = info.stop - expr_upper.begin(); + llinfos << "Unhandled syntax error at " << mLastErrorPos << " in expression: " << expression << llendl; + return false; + } + + return true; +} |