# HG changeset patch
# User Teemu Piippo <teemu.s.piippo@gmail.com>
# Date 1681125919 -10800
# Node ID b2914aaeec1aab24be918e3757d1cf819f7d9954
# Parent  171d3f9638a982476a71a53d58a6411657ddcd57
Winding is now an enum class winding_e

diff -r 171d3f9638a9 -r b2914aaeec1a src/geometry.cpp
--- a/src/geometry.cpp	Mon Apr 10 14:21:17 2023 +0300
+++ b/src/geometry.cpp	Mon Apr 10 14:25:19 2023 +0300
@@ -244,7 +244,7 @@
  * @param polygon
  * @return winding
  */
-Winding winding(const QPolygonF &polygon)
+winding_e calculate_polygon_winding(const QPolygonF &polygon)
 {
 	// based on https://stackoverflow.com/a/1165943
 	double sum = 0.0;
@@ -254,7 +254,7 @@
 		const QPointF& p2 = polygon[(i + 1) % polygon.size()];
 		sum += (p2.x() - p1.x()) * (p2.y() + p1.y());
 	}
-	return (sum < 0) ? Winding::Anticlockwise : Winding::Clockwise;
+	return (sum < 0) ? winding_e::anticlockwise : winding_e::clockwise;
 }
 
 /**
diff -r 171d3f9638a9 -r b2914aaeec1a src/geometry.h
--- a/src/geometry.h	Mon Apr 10 14:21:17 2023 +0300
+++ b/src/geometry.h	Mon Apr 10 14:25:19 2023 +0300
@@ -3,30 +3,12 @@
 #include <glm/glm.hpp>
 #include <optional>
 
-enum Winding
-{
-	NoWinding,
-	Anticlockwise,
-	Clockwise,
-};
-
-//! \brief XOR operator for winding
-constexpr Winding operator^(Winding one, Winding other)
+enum class winding_e
 {
-	if (one == NoWinding or other == NoWinding) {
-		return NoWinding;
-	}
-	else {
-		const int xored = static_cast<int>(one) ^ static_cast<int>(other);
-		return static_cast<Winding>(xored);
-	}
-}
-
-constexpr Winding& operator^=(Winding& one, Winding other)
-{
-	one = one ^ other;
-	return one;
-}
+	none,
+	anticlockwise,
+	clockwise
+};
 
 struct Plane
 {
@@ -141,7 +123,7 @@
 enum class convexity_e { concave, convex };
 convexity_e quadrilateral_convexity(const Quadrilateral& quad);
 convexity_e polygon_convexity(const std::vector<glm::vec3>& polygon);
-Winding winding(const QPolygonF& polygon);
+winding_e calculate_polygon_winding(const QPolygonF& polygon);
 struct unscaled_matrix
 {
 	glm::vec3 scaling;
diff -r 171d3f9638a9 -r b2914aaeec1a src/gl/partrenderer.h
--- a/src/gl/partrenderer.h	Mon Apr 10 14:21:17 2023 +0300
+++ b/src/gl/partrenderer.h	Mon Apr 10 14:25:19 2023 +0300
@@ -113,11 +113,11 @@
 	return points2d;
 }
 
-inline Winding worldPolygonWinding(
+inline winding_e worldPolygonWinding(
 	const std::vector<glm::vec3> &points,
 	const PartRenderer* renderer)
 {
-	return winding(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
+	return calculate_polygon_winding(QPolygonF{convertWorldPointsToScreenPoints(points, renderer)});
 }
 
 inline void drawWorldPoint(
diff -r 171d3f9638a9 -r b2914aaeec1a src/layers/edittools.cpp
--- a/src/layers/edittools.cpp	Mon Apr 10 14:21:17 2023 +0300
+++ b/src/layers/edittools.cpp	Mon Apr 10 14:25:19 2023 +0300
@@ -202,7 +202,7 @@
 				drawWorldPolyline(painter, points, renderer);
 			}
 			else {
-				if (worldPolygonWinding(points, this->renderer) == Winding::Clockwise) {
+				if (worldPolygonWinding(points, this->renderer) == winding_e::clockwise) {
 					painter->setBrush(pens.greenPolygonBrush);
 				}
 				else {
diff -r 171d3f9638a9 -r b2914aaeec1a src/polygoncache.cpp
--- a/src/polygoncache.cpp	Mon Apr 10 14:21:17 2023 +0300
+++ b/src/polygoncache.cpp	Mon Apr 10 14:25:19 2023 +0300
@@ -82,7 +82,7 @@
 template<typename Fn, typename Fn2>
 static void collectPolygons(
 	const ParsedLine& element,
-	Winding& winding,
+	winding_e& winding,
 	GetPolygonsContext* context,
 	Fn&& add,
 	Fn2&& reserve)
@@ -96,13 +96,13 @@
 				foundinvertnext = true;
 			}
 			else if (text == QStringLiteral("BFC CERTIFY CW")) {
-				winding = Clockwise;
+				winding = winding_e::clockwise;
 			}
 			else if (text == QStringLiteral("BFC CERTIFY CCW")) {
-				winding = Anticlockwise;
+				winding = winding_e::anticlockwise;
 			}
 			else if (text == QStringLiteral("BFC NOCERTIFY")) {
-				winding = NoWinding;
+				winding = winding_e::none;
 			}
 		},
 		[&](const LineType2& line2) {
@@ -147,12 +147,12 @@
 	const QTextDocument* model,
 	GetPolygonsContext* context)
 {
-	Winding winding = NoWinding;
+	winding_e winding = winding_e::none;
 	std::vector<WithId<PolygonElement>> result;
 	int i = 0;
 	const auto add = [&result, &winding, &i](int lineno, const PolygonElement& poly){
 		result.push_back({poly, i});
-		if (lineno != 1 and winding == Winding::Clockwise) {
+		if (lineno != 1 and winding == winding_e::clockwise) {
 			gl::invert(result.back());
 		}
 	};