How to resolve the algorithm Find if a point is within a triangle step by step in the J programming language

Published on 12 May 2024 09:40 PM
#J

How to resolve the algorithm Find if a point is within a triangle step by step in the J programming language

Table of Contents

Problem Statement

Find if a point is within a triangle.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Find if a point is within a triangle step by step in the J programming language

Source code in the j programming language

area=: [:| 0.5-/ .*@,.+. NB. signed area of triangle
I3=: =i.3 NB. identity matrix
inside=: {{ (area y)=+/area"1|:(I3*x)+(1-I3)*y }}


   0j0 inside 1.5j2.4 5.1j_3.1 _3.8j1.2
1
   0j1 inside 1.5j2.4 5.1j_3.1 _3.8j1.2
1
   3j1 inside 1.5j2.4 5.1j_3.1 _3.8j1.2
0
   5.414285714285714j14.349206349206348 inside 0.1j1r9 12.5j100r3 25j100r9
1
   5.414285714285714j14.349206349206348 inside 0.1j1r9 12.5j100r3 _12.5j100r6
1

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