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gordonwoodhull / segment-intersection.js
Created October 9, 2015 20:10
// Adapted from http://stackoverflow.com/questions/563198/how-do-you-detect-where-two-line-segments-intersect/1968345#1968345
var eps = 0.0000001;
function between(a, b, c) {
return a-eps <= b && b <= c+eps;
}
function segment_intersection(x1,y1,x2,y2, x3,y3,x4,y4) {
var x=((x1*y2-y1*x2)*(x3-x4)-(x1-x2)*(x3*y4-y3*x4)) /
((x1-x2)*(y3-y4)-(y1-y2)*(x3-x4));
var y=((x1*y2-y1*x2)*(y3-y4)-(y1-y2)*(x3*y4-y3*x4)) /
((x1-x2)*(y3-y4)-(y1-y2)*(x3-x4));
@gordonwoodhull
gordonwoodhull / gvparse.hpp
Last active August 29, 2015 14:22
Parse graphviz graph description at C++ compile time using metaparse! (incomplete)
#define MPLLIBS_LIMIT_SEQUENCE_SIZE 7
#define MPLLIBS_LIMIT_STRING_SIZE 256
#include <mpllibs/metaparse/string.hpp>
#include <mpllibs/metaparse/keyword.hpp>
#include <mpllibs/metaparse/token.hpp>
#include <mpllibs/metaparse/lit_c.hpp>
#include <mpllibs/metaparse/any.hpp>
#include <mpllibs/metaparse/alphanum.hpp>
#include <mpllibs/metaparse/sequence.hpp>
@gordonwoodhull
gordonwoodhull / readme.md
Last active December 23, 2015 06:59 — forked from jlewin/readme.md

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