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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.modelviewer;
     18 
     19 import android.renderscript.Matrix4f;
     20 import android.renderscript.RSSurfaceView;
     21 import android.renderscript.RenderScriptGL;
     22 
     23 import android.content.Context;
     24 import android.hardware.Sensor;
     25 import android.hardware.SensorEvent;
     26 import android.hardware.SensorEventListener;
     27 import android.hardware.SensorManager;
     28 import android.view.MotionEvent;
     29 import android.view.SurfaceHolder;
     30 import android.view.ScaleGestureDetector;
     31 import android.util.Log;
     32 
     33 public class SimpleModelView extends RSSurfaceView implements SensorEventListener {
     34 
     35     private RenderScriptGL mRS;
     36     private SimpleModelRS mRender;
     37 
     38     private ScaleGestureDetector mScaleDetector;
     39 
     40     private SensorManager mSensorManager;
     41     private Sensor mRotationVectorSensor;
     42     private final float[] mRotationMatrix = new float[16];
     43 
     44     private static final int INVALID_POINTER_ID = -1;
     45     private int mActivePointerId = INVALID_POINTER_ID;
     46     private boolean mUseSensor = false;
     47     private Matrix4f mIdentityMatrix = new Matrix4f();
     48 
     49     public SimpleModelView(Context context) {
     50         super(context);
     51         ensureRenderScript();
     52         mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
     53         // Get an instance of the SensorManager
     54         mSensorManager = (SensorManager)getContext().getSystemService(Context.SENSOR_SERVICE);
     55         // find the rotation-vector sensor
     56         mRotationVectorSensor = mSensorManager.getDefaultSensor(
     57                 Sensor.TYPE_ROTATION_VECTOR);
     58         mIdentityMatrix.loadIdentity();
     59     }
     60 
     61     private void ensureRenderScript() {
     62         if (mRS == null) {
     63             RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
     64             sc.setDepth(16, 24);
     65             mRS = createRenderScriptGL(sc);
     66             mRender = new SimpleModelRS();
     67             mRender.init(mRS, getResources());
     68         }
     69     }
     70 
     71     @Override
     72     public void resume() {
     73         mSensorManager.registerListener(this, mRotationVectorSensor, 10000);
     74     }
     75 
     76     @Override
     77     public void pause() {
     78         mSensorManager.unregisterListener(this);
     79     }
     80 
     81     @Override
     82     protected void onAttachedToWindow() {
     83         super.onAttachedToWindow();
     84         ensureRenderScript();
     85     }
     86 
     87     @Override
     88     public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
     89         super.surfaceChanged(holder, format, w, h);
     90         mRender.surfaceChanged();
     91     }
     92 
     93     @Override
     94     protected void onDetachedFromWindow() {
     95         mRender = null;
     96         if (mRS != null) {
     97             mRS = null;
     98             destroyRenderScriptGL();
     99         }
    100     }
    101 
    102     public void loadA3DFile(String path) {
    103         mRender.loadA3DFile(path);
    104     }
    105 
    106     @Override
    107     public boolean onTouchEvent(MotionEvent ev) {
    108         mScaleDetector.onTouchEvent(ev);
    109 
    110         boolean ret = false;
    111         float x = ev.getX();
    112         float y = ev.getY();
    113 
    114         final int action = ev.getAction();
    115 
    116         switch (action & MotionEvent.ACTION_MASK) {
    117         case MotionEvent.ACTION_DOWN: {
    118             mRender.onActionDown(x, y);
    119             mActivePointerId = ev.getPointerId(0);
    120             ret = true;
    121             break;
    122         }
    123         case MotionEvent.ACTION_MOVE: {
    124             if (!mScaleDetector.isInProgress()) {
    125                 mRender.onActionMove(x, y);
    126             }
    127             mRender.onActionDown(x, y);
    128             ret = true;
    129             break;
    130         }
    131 
    132         case MotionEvent.ACTION_UP: {
    133             mActivePointerId = INVALID_POINTER_ID;
    134             break;
    135         }
    136 
    137         case MotionEvent.ACTION_CANCEL: {
    138             mActivePointerId = INVALID_POINTER_ID;
    139             break;
    140         }
    141 
    142         case MotionEvent.ACTION_POINTER_UP: {
    143             final int pointerIndex = (ev.getAction() & MotionEvent.ACTION_POINTER_INDEX_MASK)
    144                     >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
    145             final int pointerId = ev.getPointerId(pointerIndex);
    146             if (pointerId == mActivePointerId) {
    147                 // This was our active pointer going up. Choose a new
    148                 // active pointer and adjust accordingly.
    149                 final int newPointerIndex = pointerIndex == 0 ? 1 : 0;
    150                 x = ev.getX(newPointerIndex);
    151                 y = ev.getY(newPointerIndex);
    152                 mRender.onActionDown(x, y);
    153                 mActivePointerId = ev.getPointerId(newPointerIndex);
    154             }
    155             break;
    156         }
    157         }
    158 
    159         return ret;
    160     }
    161 
    162     private class ScaleListener extends ScaleGestureDetector.SimpleOnScaleGestureListener {
    163         @Override
    164         public boolean onScale(ScaleGestureDetector detector) {
    165             mRender.onActionScale(detector.getScaleFactor());
    166             return true;
    167         }
    168     }
    169 
    170     public void onSensorChanged(SensorEvent event) {
    171         // we received a sensor event. it is a good practice to check
    172         // that we received the proper event
    173         if (mUseSensor) {
    174             if (event.sensor.getType() == Sensor.TYPE_ROTATION_VECTOR) {
    175                 // convert the rotation-vector to a 4x4 matrix. the matrix
    176                 // is interpreted by Open GL as the inverse of the
    177                 // rotation-vector, which is what we want.
    178                 SensorManager.getRotationMatrixFromVector(
    179                         mRotationMatrix , event.values);
    180 
    181                 if (mRender != null) {
    182                     mRender.onPostureChanged(new Matrix4f(mRotationMatrix));
    183                 }
    184             }
    185         }
    186     }
    187 
    188     public void onAccuracyChanged(Sensor sensor, int accuracy) {
    189     }
    190 
    191     public void toggleSensor() {
    192         mUseSensor = !mUseSensor;
    193         if (mUseSensor == false) {
    194             mRender.onPostureChanged(mIdentityMatrix);
    195         }
    196     }
    197 }
    198