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/*
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Licensed to the Software Freedom Conservancy (SFC) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The SFC licenses this file
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to you under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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     http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "interactions_common.h"
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#include "logging.h"
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#include <assert.h>
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#include <math.h>
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#include <stdlib.h>
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unsigned long distanceBetweenPoints(long fromX, long fromY, long toX, long toY)
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{
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  if (fromX < 0) {
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	  LOG(WARN) << "From X appears to be < 0. Rounding to 0. " << fromX;
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	  fromX = 0;
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  }
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  if (fromY < 0) {
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	  LOG(WARN) << "From Y appears to be < 0. Rounding to 0. " << fromY;
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	  fromY = 0;
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  }
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  if (toX < 0) {
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	  LOG(WARN) << "To X appears to be < 0. Rounding to 0. " << toX;
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	  toX = 0;
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  }
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  if (toY < 0) {
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	  LOG(WARN) << "From X appears to be < 0. Rounding to 0. " << toY;
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	  toY = 0;
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  }
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  assert(fromX >= 0);
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  assert(fromY >= 0);
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  assert(toX >= 0);
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  assert(toY >= 0);
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  long xDiff = abs(toX - fromX);
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  long yDiff = abs(toY - fromY);
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  // Cast first argument of pow to double, since conversion of arguments on
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  // Visual Studio ends up creating ambiguity.
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  return (long) sqrt(pow((double) xDiff, 2) + pow((double) yDiff, 2));
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}
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