From 45322ce97566a8fe1ce7573cff62934a20d041fd Mon Sep 17 00:00:00 2001
From: Felix Herbst <felix.herbst@gmail.com>
Date: Tue, 6 Sep 2022 22:13:07 +0200
Subject: [PATCH] wip add SHORT support (for exporting meshopt-compressed
 meshes, not working yet)

---
 examples/jsm/exporters/GLTFExporter.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/examples/jsm/exporters/GLTFExporter.js b/examples/jsm/exporters/GLTFExporter.js
index c3f0a3f04baaa6..d1236b6fb2bb33 100644
--- a/examples/jsm/exporters/GLTFExporter.js
+++ b/examples/jsm/exporters/GLTFExporter.js
@@ -157,6 +157,7 @@ const WEBGL_CONSTANTS = {
 
 	BYTE: 0x1400,
 	UNSIGNED_BYTE: 0x1401,
+	SHORT: 0x1402,
 	UNSIGNED_SHORT: 0x1403,
 	FLOAT: 0x1406,
 	UNSIGNED_INT: 0x1405,
@@ -952,6 +953,10 @@ class GLTFWriter {
 
 					dataView.setInt8( offset, value );
 
+				} else if ( componentType === WEBGL_CONSTANTS.SHORT ) {
+
+					dataView.setInt16( offset, value );
+
 				}
 
 				offset += componentSize;
@@ -1074,6 +1079,10 @@ class GLTFWriter {
 
 			componentType = WEBGL_CONSTANTS.BYTE;
 
+		} else if ( attribute.array.constructor === Int16Array ) {
+
+			componentType = WEBGL_CONSTANTS.SHORT;
+
 		} else {
 
 			throw new Error( 'THREE.GLTFExporter: Unsupported bufferAttribute component type: ' + attribute.array.constructor );