add read shortbuffer in position

engine/src/main/java/org/andresoviedo/android_3d_model_engine/drawer/DrawerImpl.java

@@ -505,13 +505,6 @@ private void drawShape(Object3DData obj, int drawMode, int drawSize) {
             drawBufferType = GLES20.GL_UNSIGNED_SHORT;
         }
 
-//        if (drawBufferType == GLES20.GL_UNSIGNED_SHORT){
-//            drawOrderBuffer = obj.getDrawOrderAsShort();
-//        }
-//
-//        if (drawBufferType == GLES20.GL_UNSIGNED_BYTE){
-//            drawOrderBuffer = obj.getDrawOrderAsByte();
-//        }
 
         if (obj.isDrawUsingArrays()) {
             drawOrderBuffer = null;

engine/src/main/java/org/andresoviedo/android_3d_model_engine/services/gltf/GltfLoader.java

@@ -107,9 +107,22 @@ private static void traverseNode(NodeModel node, List<Object3DData> ret, int ind
                     // get accessor, bufferview, and buffer for vertex buffer, normal buffer
                     // texture coordinate buffer
                     AccessorModel accessor = attriMap.get(key);
-                    //TODO: ShortBuffer cannot be converted to FloatBuffer, try consider convert
-                    FloatBuffer dataFB = (FloatBuffer)accessor.getCorrBufferData();
 
+                    // TODO: add read of other types of buffer if needed
+                    Buffer dataB = accessor.getCorrBufferData();
+                    FloatBuffer dataFB = null;
+                    if (dataB instanceof FloatBuffer){
+                        dataFB = (FloatBuffer)dataB;
+                    } else if (dataB instanceof ShortBuffer){
+                        ShortBuffer dataSB = (ShortBuffer)dataB;
+                        short[] shortArr = new short[dataSB.capacity()];
+                        dataSB.get(shortArr);
+                        ByteBuffer bb = ByteBuffer.allocate(shortArr.length * 2);
+                        bb.asShortBuffer().put(shortArr);
+                        dataFB = bb.asFloatBuffer();
+                    }
+
+//                    FloatBuffer dataFB = accessor.getCorrBufferData();
                     if (key.equals("POSITION")){
                         transformVertices(data3D, node, dataFB);
                         data3D.setVertexArrayBuffer(dataFB);

engine/src/main/java/org/andresoviedo/android_3d_model_engine/services/gltf/jgltf_model/AccessorModel.java

@@ -27,7 +27,6 @@
 package org.andresoviedo.android_3d_model_engine.services.gltf.jgltf_model;
 
 import java.nio.Buffer;
-
 /**
  * Interface for a data accessor
  */

engine/src/main/java/org/andresoviedo/android_3d_model_engine/services/gltf/jgltf_model/impl/DefaultAccessorModel.java

@@ -252,18 +252,24 @@ public Buffer getCorrBufferData(){
             short[] ver = bytesToShort(byte2);
             retBuffer = tempbuf.asShortBuffer();
             ((ShortBuffer)retBuffer).put(ver);
+//            tempbuf.asShortBuffer().put(ver);
         } else if (type == GLES20.GL_UNSIGNED_INT) {
             int[] ver = bytesToInt(byte2);
             retBuffer = tempbuf.asIntBuffer();
             ((IntBuffer)retBuffer).put(ver);
+//            tempbuf.asIntBuffer().put(ver);
         } else if (type == GLES20.GL_UNSIGNED_BYTE){
             retBuffer = tempbuf;
             ((ByteBuffer)retBuffer).put(byte2);
+//            tempbuf.put(byte2);
         } else if (type == GLES20.GL_FLOAT){
             float[] ver = byteToFloat(byte2);
             retBuffer = tempbuf.asFloatBuffer();
             ((FloatBuffer)retBuffer).put(ver);
+//            float[] ver = byteToFloat(byte2);
+//            tempbuf.asFloatBuffer().put(ver);
         }
+//        tempbuf.position(0);
         retBuffer.position(0);
 
         return retBuffer;