FSVGImporterUtils::ShouldPolygonBeDrawn

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Description

Evaluates if the specified ShapeToCheck is to be drawn or not (e.g. actual shape or hole to be cut) The value nonzero determines the "insideness" of a point in the shape by drawing a ray from that point to infinity in any direction, and then examining the places where a segment of the shape crosses the ray. Starting with a count of zero, add one each time a path segment crosses the ray from left to right and subtract one each time a path segment crosses the ray from right to left. After counting the crossings, if the result is zero then the point is outside the path. Otherwise, it is inside.

See: https://developer.mozilla.org/en-US/docs/Web/Attribute/fill-rule

For now, this function is only considering the non-zero fill rule. todo: might need support for even odd fill rule.

static bool ShouldPolygonBeDrawn  
(  
    const FSVGPathPolygon & ShapeToCheck,  
    const TArray < FSVGPathPolygon > & Polygons,  
    bool & bOutIsClockwise  
)  
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static bool ShouldPolygonBeDrawn (     const FSVGPathPolygon & ShapeToCheck,     const TArray < FSVGPathPolygon > & Polygons,     bool & bOutIsClockwise )