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Clarify is_polygon_clockwise() coordinate system

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The function assumes a normal Cartesian coordinate system.
This commit is contained in:
lawnjelly 2024-05-20 10:16:23 +01:00
parent daa81bbb7d
commit 331ecf3ca8
2 changed files with 3 additions and 0 deletions
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2
core/math/geometry_2d.h
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@ -350,6 +350,8 @@ public:
return triangles;
}
// Assumes cartesian coordinate system with +x to the right, +y up.
// If using screen coordinates (+x to the right, +y down) the result will need to be flipped.
static bool is_polygon_clockwise(const Vector<Vector2> &p_polygon) {
int c = p_polygon.size();
if (c < 3) {

1
doc/classes/Geometry2D.xml
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@ -116,6 +116,7 @@
<param index="0" name="polygon" type="PackedVector2Array" />
<description>
Returns [code]true[/code] if [param polygon]'s vertices are ordered in clockwise order, otherwise returns [code]false[/code].
[b]Note:[/b] Assumes a Cartesian coordinate system where [code]+x[/code] is right and [code]+y[/code] is up. If using screen coordinates ([code]+y[/code] is down), the result will need to be flipped (i.e. a [code]true[/code] result will indicate counter-clockwise).
</description>
</method>
<method name="line_intersects_line">