Merge pull request #14279 from WestLangley/dev-fat_line_fix

Fix for fat line pixelation artifacts

examples/js/lines/LineMaterial.js

@@ -205,19 +205,19 @@ THREE.ShaderLib[ 'line' ] = {
 
 			#ifdef USE_DASH
 
-				if ( vUv.y < 0.5 || vUv.y > 0.5 ) discard; // discard endcaps
+				if ( vUv.y < - 1.0 || vUv.y > 1.0 ) discard; // discard endcaps
 
 				if ( mod( vLineDistance, dashSize + gapSize ) > dashSize ) discard; // todo - FIX
 
 			#endif
 
-			if ( vUv.y < 0.5 || vUv.y > 0.5 ) {
+			if ( abs( vUv.y ) > 1.0 ) {
 
-				float a = vUv.x - 0.5;
-				float b = vUv.y - 0.5;
+				float a = vUv.x;
+				float b = ( vUv.y > 0.0 ) ? vUv.y - 1.0 : vUv.y + 1.0;
 				float len2 = a * a + b * b;
 
-				if ( len2 > 0.25 ) discard;
+				if ( len2 > 1.0 ) discard;
 
 			}
 

examples/js/lines/LineSegmentsGeometry.js

@@ -12,7 +12,7 @@ THREE.LineSegmentsGeometry = function () {
 	var plane = new THREE.BufferGeometry();
 
 	var positions = [ - 1, 2, 0, 1, 2, 0, - 1, 1, 0, 1, 1, 0, - 1, 0, 0, 1, 0, 0, - 1, - 1, 0, 1, - 1, 0 ];
-	var uvs = [ 0, 1, 1, 1, 0, .5, 1, .5, 0, .5, 1, .5, 0, 0, 1, 0 ];
+	var uvs = [ - 1, 2, 1, 2, - 1, 1, 1, 1, - 1, - 1, 1, - 1, - 1, - 2, 1, - 2 ];
 	var index = [ 0, 2, 1, 2, 3, 1, 2, 4, 3, 4, 5, 3, 4, 6, 5, 6, 7, 5 ];
 
 	this.setIndex( index );