test indexBuffer correctly in mesh class (playcanvas#2024)

slimbuck · Donovan Hutchence · web-flow · commit f591bbeeb6ae · 2020-04-27T15:27:32.000+01:00
Co-authored-by: Donovan Hutchence &lt;dhutchence@snapchat.com&gt;
diff --git a/src/scene/mesh.js b/src/scene/mesh.js
@@ -545,7 +545,7 @@ Object.assign(pc, function () {
                 // set up primitive parameters
                 this.primitive[0].type = (primitiveType === undefined ? pc.PRIMITIVE_TRIANGLES : primitiveType);
 
-                if (this.indexBuffer && this.indexBuffer[0]) {      // indexed
+                if (this.indexBuffer.length > 0 && this.indexBuffer[0]) {      // indexed
                     if (this._geometryData.indexStreamUpdated) {
                         this.primitive[0].count = this._geometryData.indexCount;
                         this.primitive[0].indexed = true;
@@ -647,7 +647,7 @@ Object.assign(pc, function () {
 
             var lines = [];
             var format;
-            if (this.indexBuffer[0]) {
+            if (this.indexBuffer.length > 0 && this.indexBuffer[0]) {
                 var offsets = [[0, 1], [1, 2], [2, 0]];
 
                 var base = this.primitive[pc.RENDERSTYLE_SOLID].base;
diff --git a/tools/glb-viewer/src/debug.js b/tools/glb-viewer/src/debug.js
@@ -44,7 +44,6 @@ var DebugLines = function (app, camera) {
 
     // construct the material
     var material = new pc.BasicMaterial();
-    material.blend = false;
     material.blendType = pc.BLEND_NORMAL;
     material.update();
 
