GLTFExporter: Fix omitted wrapS/wrapT sampler modes.

examples/js/exporters/GLTFExporter.js

@@ -28,19 +28,26 @@ var WEBGL_CONSTANTS = {
 	NEAREST_MIPMAP_NEAREST: 0x2700,
 	LINEAR_MIPMAP_NEAREST: 0x2701,
 	NEAREST_MIPMAP_LINEAR: 0x2702,
-	LINEAR_MIPMAP_LINEAR: 0x2703
-};
+	LINEAR_MIPMAP_LINEAR: 0x2703,
 
-var THREE_TO_WEBGL = {
-	// @TODO Replace with computed property name [THREE.*] when available on es6
-	1003: WEBGL_CONSTANTS.NEAREST,
-	1004: WEBGL_CONSTANTS.NEAREST_MIPMAP_NEAREST,
-	1005: WEBGL_CONSTANTS.NEAREST_MIPMAP_LINEAR,
-	1006: WEBGL_CONSTANTS.LINEAR,
-	1007: WEBGL_CONSTANTS.LINEAR_MIPMAP_NEAREST,
-	1008: WEBGL_CONSTANTS.LINEAR_MIPMAP_LINEAR
+	CLAMP_TO_EDGE: 33071,
+	MIRRORED_REPEAT: 33648,
+	REPEAT: 10497
 };
 
+var THREE_TO_WEBGL = {};
+
+THREE_TO_WEBGL[ THREE.NearestFilter ] = WEBGL_CONSTANTS.NEAREST;
+THREE_TO_WEBGL[ THREE.NearestMipMapNearestFilter ] = WEBGL_CONSTANTS.NEAREST_MIPMAP_NEAREST;
+THREE_TO_WEBGL[ THREE.NearestMipMapLinearFilter ] = WEBGL_CONSTANTS.NEAREST_MIPMAP_LINEAR;
+THREE_TO_WEBGL[ THREE.LinearFilter ] = WEBGL_CONSTANTS.LINEAR;
+THREE_TO_WEBGL[ THREE.LinearMipMapNearestFilter ] = WEBGL_CONSTANTS.LINEAR_MIPMAP_NEAREST;
+THREE_TO_WEBGL[ THREE.LinearMipMapLinearFilter ] = WEBGL_CONSTANTS.LINEAR_MIPMAP_LINEAR;
+
+THREE_TO_WEBGL[ THREE.ClampToEdgeWrapping ] = WEBGL_CONSTANTS.CLAMP_TO_EDGE;
+THREE_TO_WEBGL[ THREE.RepeatWrapping ] = WEBGL_CONSTANTS.REPEAT;
+THREE_TO_WEBGL[ THREE.MirroredRepeatWrapping ] = WEBGL_CONSTANTS.MIRRORED_REPEAT;
+
 var PATH_PROPERTIES = {
 	scale: 'scale',
 	position: 'translation',