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Sample code for OpenGL Android training class
( Original Id: Ib1650025a3c4b018c60d70ede3f25113660f68d8 ) Change-Id: I1d760b75d1f2bfe1ec90c71471867577bd146241 (cherry picked from commit 66f6fe6)
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‎samples/OpenGL/HelloOpenGLES10/.gitignore‎

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# Files ignored for git source control
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#
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# Add this file to source control so the following files
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# are not tracked and added to git:
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.project
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.classpath
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project.properties
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bin/
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gen/

‎samples/OpenGL/HelloOpenGLES10/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright (C) 2011 The Android Open Source Project.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<manifest
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xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.example.android.opengl"
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android:versionCode="1"
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android:versionName="1.0" >
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<uses-sdk
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android:minSdkVersion="4"
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android:targetSdkVersion="17" />
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<!-- Tell the system this app requires OpenGL ES 1.0 or higher-->
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<uses-feature android:glEsVersion="0x00010000" />
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<application
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android:icon="@drawable/ic_launcher"
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android:label="@string/app_name"
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android:allowBackup="true" >
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<activity
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android:name="com.example.android.opengl.OpenGLES10Activity"
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android:label="@string/app_name" >
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<intent-filter>
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<action android:name="android.intent.action.MAIN" />
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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</application>
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</manifest>

‎samples/OpenGL/HelloOpenGLES10/res/drawable/ic_launcher.png‎

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‎samples/OpenGL/HelloOpenGLES10/res/layout/main.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright (C) 2011 The Android Open Source Project.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<LinearLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="fill_parent"
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android:layout_height="fill_parent"
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android:orientation="vertical" >
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<TextView
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android:layout_width="fill_parent"
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android:layout_height="wrap_content"
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android:text="@string/hello" />
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</LinearLayout>

‎samples/OpenGL/HelloOpenGLES10/res/values/strings.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright (C) 2011 The Android Open Source Project.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<resources>
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<string name="hello">Hello, OpenGL ES 1.0!</string>
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<string name="app_name">Hello OpenGL ES 1.0</string>
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</resources>

‎samples/OpenGL/HelloOpenGLES10/src/com/example/android/opengl/MyGLRenderer.java‎

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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.opengl;
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import javax.microedition.khronos.egl.EGLConfig;
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import javax.microedition.khronos.opengles.GL10;
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import android.opengl.GLSurfaceView;
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import android.opengl.GLU;
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/**
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* Provides drawing instructions for a GLSurfaceView object. This class
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* must override the OpenGL ES drawing lifecycle methods:
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* <ul>
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* <li>{@link android.opengl.GLSurfaceView.Renderer#onSurfaceCreated}</li>
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* <li>{@link android.opengl.GLSurfaceView.Renderer#onDrawFrame}</li>
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* <li>{@link android.opengl.GLSurfaceView.Renderer#onSurfaceChanged}</li>
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* </ul>
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*/
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public class MyGLRenderer implements GLSurfaceView.Renderer {
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private Triangle mTriangle;
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private Square mSquare;
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private float mAngle;
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@Override
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public void onSurfaceCreated(GL10 gl, EGLConfig config) {
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// Set the background frame color
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gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
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mTriangle = new Triangle();
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mSquare = new Square();
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}
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@Override
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public void onDrawFrame(GL10 gl) {
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// Draw background color
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gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
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// Set GL_MODELVIEW transformation mode
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gl.glMatrixMode(GL10.GL_MODELVIEW);
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gl.glLoadIdentity(); // reset the matrix to its default state
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// When using GL_MODELVIEW, you must set the view point
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GLU.gluLookAt(gl, 0, 0, -3, 0f, 0f, 0f, 0f, 1.0f, 0.0f);
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// Draw square
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mSquare.draw(gl);
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// Create a rotation for the triangle
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// Use the following code to generate constant rotation.
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// Leave this code out when using TouchEvents.
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// long time = SystemClock.uptimeMillis() % 4000L;
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// float angle = 0.090f * ((int) time);
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gl.glRotatef(mAngle, 0.0f, 0.0f, 1.0f);
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// Draw triangle
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mTriangle.draw(gl);
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}
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@Override
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public void onSurfaceChanged(GL10 gl, int width, int height) {
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// Adjust the viewport based on geometry changes
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// such as screen rotations
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gl.glViewport(0, 0, width, height);
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// make adjustments for screen ratio
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float ratio = (float) width / height;
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gl.glMatrixMode(GL10.GL_PROJECTION); // set matrix to projection mode
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gl.glLoadIdentity(); // reset the matrix to its default state
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gl.glFrustumf(-ratio, ratio, -1, 1, 3, 7); // apply the projection matrix
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}
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/**
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* Returns the rotation angle of the triangle shape (mTriangle).
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*
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* @return - A float representing the rotation angle.
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*/
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public float getAngle() {
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return mAngle;
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}
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/**
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* Sets the rotation angle of the triangle shape (mTriangle).
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*/
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public void setAngle(float angle) {
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mAngle = angle;
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}
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}

‎samples/OpenGL/HelloOpenGLES10/src/com/example/android/opengl/MyGLSurfaceView.java‎

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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.opengl;
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import android.content.Context;
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import android.opengl.GLSurfaceView;
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import android.view.MotionEvent;
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/**
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* A view container where OpenGL ES graphics can be drawn on screen.
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* This view can also be used to capture touch events, such as a user
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* interacting with drawn objects.
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*/
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public class MyGLSurfaceView extends GLSurfaceView {
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private final MyGLRenderer mRenderer;
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public MyGLSurfaceView(Context context) {
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super(context);
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// Set the Renderer for drawing on the GLSurfaceView
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mRenderer = new MyGLRenderer();
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setRenderer(mRenderer);
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// Render the view only when there is a change in the drawing data
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setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
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}
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private final float TOUCH_SCALE_FACTOR = 180.0f / 320;
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private float mPreviousX;
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private float mPreviousY;
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@Override
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public boolean onTouchEvent(MotionEvent e) {
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// MotionEvent reports input details from the touch screen
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// and other input controls. In this case, we are only
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// interested in events where the touch position changed.
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float x = e.getX();
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float y = e.getY();
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switch (e.getAction()) {
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case MotionEvent.ACTION_MOVE:
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float dx = x - mPreviousX;
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float dy = y - mPreviousY;
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// reverse direction of rotation above the mid-line
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if (y > getHeight() / 2) {
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dx = dx * -1 ;
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}
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// reverse direction of rotation to left of the mid-line
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if (x < getWidth() / 2) {
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dy = dy * -1 ;
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}
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mRenderer.setAngle(
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mRenderer.getAngle() +
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((dx + dy) * TOUCH_SCALE_FACTOR)); // = 180.0f / 320
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requestRender();
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}
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mPreviousX = x;
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mPreviousY = y;
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return true;
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}
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}

‎samples/OpenGL/HelloOpenGLES10/src/com/example/android/opengl/OpenGLES10Activity.java‎

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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.opengl;
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import android.app.Activity;
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import android.opengl.GLSurfaceView;
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import android.os.Bundle;
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public class OpenGLES10Activity extends Activity {
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private GLSurfaceView mGLView;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// Create a GLSurfaceView instance and set it
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// as the ContentView for this Activity.
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mGLView = new MyGLSurfaceView(this);
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setContentView(mGLView);
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}
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@Override
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protected void onPause() {
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// The following call pauses the rendering thread.
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// If your OpenGL application is memory intensive,
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// you should consider de-allocating objects that
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// consume significant memory here.
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super.onPause();
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mGLView.onPause();
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}
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@Override
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protected void onResume() {
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// The following call resumes a paused rendering thread.
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// If you de-allocated graphic objects for onPause()
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// this is a good place to re-allocate them.
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super.onResume();
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mGLView.onResume();
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}
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}

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