InPoly: Difference between revisions
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(Created page with "{{Welcome| desc=Checks if a point is inside a polygon defined by multiple vertices.| params=<syntaxhighlight lang="lua">(px, py, x1, y1, x2, y2, ...)</syntaxhighlight> <poem>::px, py: The coordinates of the point to be checked. ::x1, y1: The coordinates of the first vertex of the polygon. ::x2, y2: The coordinates of the second vertex of the polygon. ::...: The coordinates of subsequent vertices of the polygon.</poem>| retvals=Returns `true` if the point is inside the po...") |
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::...: The coordinates of subsequent vertices of the polygon.</poem>| | ::...: The coordinates of subsequent vertices of the polygon.</poem>| | ||
retvals=Returns `true` if the point is inside the polygon, otherwise returns `false`.| | retvals=Returns `true` if the point is inside the polygon, otherwise returns `false`.| | ||
example=<source lang="lua"> | example=[[File:InPoly.png|thumb|]] | ||
<source lang="lua"> | |||
local inside = InPoly(3, 4, 0, 0, 6, 0, 6, 6, 0, 6); | local inside = InPoly(3, 4, 0, 0, 6, 0, 6, 6, 0, 6); | ||
if(inside) | if(inside) | ||
Revision as of 07:50, 1 October 2024
Description:
Checks if a point is inside a polygon defined by multiple vertices.
Parameters:
(px, py, x1, y1, x2, y2, ...)
px, py: The coordinates of the point to be checked.
x1, y1: The coordinates of the first vertex of the polygon.
x2, y2: The coordinates of the second vertex of the polygon.
...: The coordinates of subsequent vertices of the polygon.
Return Values:
Returns `true` if the point is inside the polygon, otherwise returns `false`.
Example
local inside = InPoly(3, 4, 0, 0, 6, 0, 6, 6, 0, 6);
if(inside)
print("The point (3,4) is inside the polygon.");
else
print("The point (3,4) is outside the polygon.");