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
17package com.android.modelviewer;
18
19import android.renderscript.Matrix4f;
20import android.renderscript.RSSurfaceView;
21import android.renderscript.RenderScriptGL;
22
23import android.content.Context;
24import android.hardware.Sensor;
25import android.hardware.SensorEvent;
26import android.hardware.SensorEventListener;
27import android.hardware.SensorManager;
28import android.view.MotionEvent;
29import android.view.SurfaceHolder;
30import android.view.ScaleGestureDetector;
31import android.util.Log;
32
33public 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