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optimize further_point_from_line

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scanner 2017-01-20 16:33:54 +01:00
parent fb15d3d5b1
commit 88adc0ba22
2 changed files with 6 additions and 5 deletions
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1
CMakeLists.txt
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@ -7,6 +7,7 @@ endif(NOT CMAKE_BUILD_TYPE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Wall -Werror -pedantic")
set(CMAKE_CXX_FLAGS_PROFILE "${CMAKE_CXX_FLAGS_DEBUG} -Wall -Werror -pedantic -pg")
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -Wextra -pedantic -D_DEBUG")

10
geometry.cpp
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@ -9,6 +9,9 @@ using namespace cv;
#include "geometry.h"
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
double dist(Point a, Point b)
{
return sqrt((double)pow(a.x-b.x,2)+pow(a.y-b.y,2));
@ -115,16 +118,13 @@ cv::Point
further_point_from_line(cv::Vec<double,3> line, std::vector<Point> points)
{
//distance = abs(a*p.x+b*p.y+c) / sqrt(a^2+b^2)
double denom = sqrt(line(0)*line(0)+line(1)*line(1));
Point further = points[0];
double maxdist = -1;
std::cout << "--- further" << std::endl;
for(Point p: points)
{
double numerator = abs(line(0)*p.x + line(1)*p.y + line(2));
double distance = numerator/denom;
if(distance > maxdist) {
maxdist = distance;
if(numerator > maxdist) {
maxdist = numerator;
further = p;
}
}