109dbbe93SAndrew Rist /************************************************************** 2*b056bc42Smseidel * 309dbbe93SAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 409dbbe93SAndrew Rist * or more contributor license agreements. See the NOTICE file 509dbbe93SAndrew Rist * distributed with this work for additional information 609dbbe93SAndrew Rist * regarding copyright ownership. The ASF licenses this file 709dbbe93SAndrew Rist * to you under the Apache License, Version 2.0 (the 809dbbe93SAndrew Rist * "License"); you may not use this file except in compliance 909dbbe93SAndrew Rist * with the License. You may obtain a copy of the License at 10*b056bc42Smseidel * 1109dbbe93SAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*b056bc42Smseidel * 1309dbbe93SAndrew Rist * Unless required by applicable law or agreed to in writing, 1409dbbe93SAndrew Rist * software distributed under the License is distributed on an 1509dbbe93SAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 1609dbbe93SAndrew Rist * KIND, either express or implied. See the License for the 1709dbbe93SAndrew Rist * specific language governing permissions and limitations 1809dbbe93SAndrew Rist * under the License. 19*b056bc42Smseidel * 2009dbbe93SAndrew Rist *************************************************************/ 2109dbbe93SAndrew Rist 2209dbbe93SAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir // MARKER(update_precomp.py): autogen include statement, do not remove 25cdf0e10cSrcweir #include "precompiled_basegfx.hxx" 26cdf0e10cSrcweir #include <basegfx/numeric/ftools.hxx> 272a27d9caSArmin Le Grand #include <algorithm> 28cdf0e10cSrcweir 29cdf0e10cSrcweir namespace basegfx 30cdf0e10cSrcweir { 31cdf0e10cSrcweir // init static member of class fTools 32cdf0e10cSrcweir double ::basegfx::fTools::mfSmallValue = 0.000000001; 332a27d9caSArmin Le Grand snapToNearestMultiple(double v,const double fStep)342a27d9caSArmin Le Grand double snapToNearestMultiple(double v, const double fStep) 352a27d9caSArmin Le Grand { 362a27d9caSArmin Le Grand if(fTools::equalZero(fStep)) 372a27d9caSArmin Le Grand { 382a27d9caSArmin Le Grand // with a zero step, all snaps to 0.0 392a27d9caSArmin Le Grand return 0.0; 402a27d9caSArmin Le Grand } 412a27d9caSArmin Le Grand else 422a27d9caSArmin Le Grand { 432a27d9caSArmin Le Grand const double fHalfStep(fStep * 0.5); 442a27d9caSArmin Le Grand const double fChange(fHalfStep - fmod(v + fHalfStep, fStep)); 452a27d9caSArmin Le Grand 46*b056bc42Smseidel if(basegfx::fTools::equal(fabs(v), fabs(fChange))) 47*b056bc42Smseidel { 48*b056bc42Smseidel return 0.0; 49*b056bc42Smseidel } 50*b056bc42Smseidel else 51*b056bc42Smseidel { 52*b056bc42Smseidel return v + fChange; 53*b056bc42Smseidel } 542a27d9caSArmin Le Grand } 552a27d9caSArmin Le Grand } 562a27d9caSArmin Le Grand snapToZeroRange(double v,double fWidth)572a27d9caSArmin Le Grand double snapToZeroRange(double v, double fWidth) 582a27d9caSArmin Le Grand { 592a27d9caSArmin Le Grand if(fTools::equalZero(fWidth)) 602a27d9caSArmin Le Grand { 612a27d9caSArmin Le Grand // with no range all snaps to range bound 622a27d9caSArmin Le Grand return 0.0; 632a27d9caSArmin Le Grand } 642a27d9caSArmin Le Grand else 652a27d9caSArmin Le Grand { 662a27d9caSArmin Le Grand if(v < 0.0 || v > fWidth) 672a27d9caSArmin Le Grand { 682a27d9caSArmin Le Grand double fRetval(fmod(v, fWidth)); 692a27d9caSArmin Le Grand 702a27d9caSArmin Le Grand if(fRetval < 0.0) 712a27d9caSArmin Le Grand { 722a27d9caSArmin Le Grand fRetval += fWidth; 732a27d9caSArmin Le Grand } 742a27d9caSArmin Le Grand 752a27d9caSArmin Le Grand return fRetval; 762a27d9caSArmin Le Grand } 772a27d9caSArmin Le Grand else 782a27d9caSArmin Le Grand { 792a27d9caSArmin Le Grand return v; 802a27d9caSArmin Le Grand } 812a27d9caSArmin Le Grand } 822a27d9caSArmin Le Grand } 832a27d9caSArmin Le Grand snapToRange(double v,double fLow,double fHigh)842a27d9caSArmin Le Grand double snapToRange(double v, double fLow, double fHigh) 852a27d9caSArmin Le Grand { 862a27d9caSArmin Le Grand if(fTools::equal(fLow, fHigh)) 872a27d9caSArmin Le Grand { 882a27d9caSArmin Le Grand // with no range all snaps to range bound 892a27d9caSArmin Le Grand return 0.0; 902a27d9caSArmin Le Grand } 912a27d9caSArmin Le Grand else 922a27d9caSArmin Le Grand { 932a27d9caSArmin Le Grand if(fLow > fHigh) 942a27d9caSArmin Le Grand { 952a27d9caSArmin Le Grand // correct range order. Evtl. assert this (?) 962a27d9caSArmin Le Grand std::swap(fLow, fHigh); 972a27d9caSArmin Le Grand } 982a27d9caSArmin Le Grand 992a27d9caSArmin Le Grand if(v < fLow || v > fHigh) 1002a27d9caSArmin Le Grand { 1012a27d9caSArmin Le Grand return snapToZeroRange(v - fLow, fHigh - fLow) + fLow; 1022a27d9caSArmin Le Grand } 1032a27d9caSArmin Le Grand else 1042a27d9caSArmin Le Grand { 1052a27d9caSArmin Le Grand return v; 1062a27d9caSArmin Le Grand } 1072a27d9caSArmin Le Grand } 1082a27d9caSArmin Le Grand } 109cdf0e10cSrcweir } // end of namespace basegfx 110cdf0e10cSrcweir 111cdf0e10cSrcweir // eof 112