SVGLoader: Fix stroke generation with round strokeLineJoin

examples/js/loaders/SVGLoader.js

@@ -1612,23 +1612,31 @@ THREE.SVGLoader.pointsToStrokeWithBuffers = function () {
 
 			if ( joinIsOnLeftSide ) {
 
-				lastInner.toArray( vertices, 0 * 3 );
-				lastInner.toArray( vertices, 3 * 3 );
+				if ( isMiter || initialJoinIsOnLeftSide ) {
 
-				if ( isMiter ) {
+					lastInner.toArray( vertices, 0 * 3 );
+					lastInner.toArray( vertices, 3 * 3 );
 
-					lastOuter.toArray( vertices, 1 * 3 );
+					if ( isMiter ) {
+
+						lastOuter.toArray( vertices, 1 * 3 );
+
+					}
 
 				}
 
 			} else {
 
-				lastInner.toArray( vertices, 1 * 3 );
-				lastInner.toArray( vertices, 3 * 3 );
+				if ( isMiter || ! initialJoinIsOnLeftSide ) {
 
-				if ( isMiter ) {
+					lastInner.toArray( vertices, 1 * 3 );
+					lastInner.toArray( vertices, 3 * 3 );
 
-					lastOuter.toArray( vertices, 0 * 3 );
+					if ( isMiter ) {
+
+						lastOuter.toArray( vertices, 0 * 3 );
+
+					}
 
 				}
 

examples/jsm/loaders/SVGLoader.js

@@ -1625,23 +1625,31 @@ SVGLoader.pointsToStrokeWithBuffers = function () {
 
 			if ( joinIsOnLeftSide ) {
 
-				lastInner.toArray( vertices, 0 * 3 );
-				lastInner.toArray( vertices, 3 * 3 );
+				if ( isMiter || initialJoinIsOnLeftSide ) {
 
-				if ( isMiter ) {
+					lastInner.toArray( vertices, 0 * 3 );
+					lastInner.toArray( vertices, 3 * 3 );
 
-					lastOuter.toArray( vertices, 1 * 3 );
+					if ( isMiter ) {
+
+						lastOuter.toArray( vertices, 1 * 3 );
+
+					}
 
 				}
 
 			} else {
 
-				lastInner.toArray( vertices, 1 * 3 );
-				lastInner.toArray( vertices, 3 * 3 );
+				if ( isMiter || ! initialJoinIsOnLeftSide ) {
 
-				if ( isMiter ) {
+					lastInner.toArray( vertices, 1 * 3 );
+					lastInner.toArray( vertices, 3 * 3 );
 
-					lastOuter.toArray( vertices, 0 * 3 );
+					if ( isMiter ) {
+
+						lastOuter.toArray( vertices, 0 * 3 );
+
+					}
 
 				}