fix error when trying to export empty vertex colors

GoB.py

@@ -945,6 +945,28 @@ def exportGoZ(self, path, scn, obj, pathImport):
                         vcolArray[vert_idx*3] = int(255*vcoldata[loop.index].color[0])
                         vcolArray[vert_idx*3+1] = int(255*vcoldata[loop.index].color[1])
                         vcolArray[vert_idx*3+2] = int(255*vcoldata[loop.index].color[2])
+
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint:  loop")
+
+                    goz_file.write(pack('<4B', 0xb9, 0x88, 0x00, 0x00))
+                    goz_file.write(pack('<I', numVertices*4+16))
+                    goz_file.write(pack('<Q', numVertices))
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint:  write numVertices")
+
+                    for i in range(0, len(vcolArray), 3):
+                        goz_file.write(pack('<B', vcolArray[i+2]))
+                        goz_file.write(pack('<B', vcolArray[i+1]))
+                        goz_file.write(pack('<B', vcolArray[i]))
+                        goz_file.write(pack('<B', 0))
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint: write color")
+
+                    vcolArray.clear()
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint:  vcolArray.clear")
+
             else:
                 if obj.data.color_attributes.active_color_name:                
                     vcoldata = me.color_attributes[obj.data.color_attributes.active_color_name].data 
@@ -954,30 +976,30 @@ def exportGoZ(self, path, scn, obj, pathImport):
                         vcolArray[v.index * 3] = int(255*vcoldata[v.index].color_srgb[0])
                         vcolArray[v.index * 3+1] = int(255*vcoldata[v.index].color_srgb[1])
                         vcolArray[v.index * 3+2] = int(255*vcoldata[v.index].color_srgb[2])
+
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint:  loop")
 
-                if prefs().performance_profiling: 
-                    start_time = profiler(start_time, "    Polypaint:  loop")
-
-                goz_file.write(pack('<4B', 0xb9, 0x88, 0x00, 0x00))
-                goz_file.write(pack('<I', numVertices*4+16))
-                goz_file.write(pack('<Q', numVertices))
-                if prefs().performance_profiling: 
-                    start_time = profiler(start_time, "    Polypaint:  write numVertices")
+                    goz_file.write(pack('<4B', 0xb9, 0x88, 0x00, 0x00))
+                    goz_file.write(pack('<I', numVertices*4+16))
+                    goz_file.write(pack('<Q', numVertices))
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint:  write numVertices")
 
-                for i in range(0, len(vcolArray), 3):
-                    goz_file.write(pack('<B', vcolArray[i+2]))
-                    goz_file.write(pack('<B', vcolArray[i+1]))
-                    goz_file.write(pack('<B', vcolArray[i]))
-                    goz_file.write(pack('<B', 0))
-                if prefs().performance_profiling: 
-                    start_time = profiler(start_time, "    Polypaint: write color")
+                    for i in range(0, len(vcolArray), 3):
+                        goz_file.write(pack('<B', vcolArray[i+2]))
+                        goz_file.write(pack('<B', vcolArray[i+1]))
+                        goz_file.write(pack('<B', vcolArray[i]))
+                        goz_file.write(pack('<B', 0))
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint: write color")
 
-                vcolArray.clear()
-                if prefs().performance_profiling: 
-                    start_time = profiler(start_time, "    Polypaint:  vcolArray.clear")
-
-            if prefs().performance_profiling: 
-                start_time = profiler(start_time, "Write Polypaint")
+                    vcolArray.clear()
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "    Polypaint:  vcolArray.clear")
+                    
+                    if prefs().performance_profiling: 
+                        start_time = profiler(start_time, "Write Polypaint")
 
             # --Mask--
             if not prefs().export_clear_mask:

__init__.py

@@ -36,7 +36,7 @@
     "name": "GoB",
     "description": "An unofficial GOZ-like addon for Blender",
     "author": "ODe, JoseConseco, Daniel Grauer",
-    "version": (3, 6, 2),
+    "version": (3, 6, 3),
     "blender": (2, 93, 0),
     "location": "In the info header",
     "doc_url": "https://github.com/JoseConseco/GoB/wiki",