wormhole shape

sources/modesConfiguration.cpp

@@ -71,6 +71,7 @@ namespace unnatural
 				&sdfTube,
 				&sdfTwistedHexagonalPrism,
 				&sdfTwistedPlane,
+				&sdfWormhole,
 			};
 
 			static constexpr uint32 shapeModesCount = sizeof(shapeModeFunctions) / sizeof(shapeModeFunctions[0]);
@@ -109,6 +110,7 @@ namespace unnatural
 				"tube",
 				"twistedhexagonalprism",
 				"twistedplane",
+				"wormhole",
 			};
 
 			static_assert(shapeModesCount == sizeof(shapeModeNames) / sizeof(shapeModeNames[0]), "number of functions and names must match");
@@ -152,6 +154,8 @@ namespace unnatural
 					return true;
 				if (name == "twistedplane")
 					return true;
+				if (name == "wormhole")
+					return true;
 				return false;
 			}();
 		}

sources/sdf.cpp

@@ -395,4 +395,11 @@ namespace unnatural
 		const Real s = min(s1, s2);
 		return smoothMin(c, s, 100);
 	}
+
+	Real sdfWormhole(const Vec3 &p)
+	{
+		const Real x = min(length(Vec2(p[0], p[2])) - 1400, 0);
+		const Real y = p[1];
+		return 700 - length(Vec2(x, y));
+	}
 }

sources/sdf.h

@@ -40,6 +40,7 @@ namespace unnatural
 	Real sdfTube(const Vec3 &pos);
 	Real sdfTwistedHexagonalPrism(const Vec3 &pos);
 	Real sdfTwistedPlane(const Vec3 &p);
+	Real sdfWormhole(const Vec3 &p);
 }
 
 #endif