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Added HelloAR Android sample
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‎Android/HelloAR/.gitignore‎

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.cxx

‎Android/HelloAR/CMakeLists.txt‎

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# Copyright (C) 2017 Google Inc.
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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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# For more information about using CMake with Android Studio, read the
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# documentation: https://d.android.com/studio/projects/add-native-code.html
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# Sets the minimum version of CMake required to build the native library.
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cmake_minimum_required(VERSION 3.4.1)
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# Import the ARCore library.
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add_library(arcore SHARED IMPORTED)
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# ARCORE_LIBPATH and ARCORE_INCLUDE are given by gradle to cmake build
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set_target_properties(arcore PROPERTIES
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IMPORTED_LOCATION ${ARCORE_LIBPATH}/${ANDROID_ABI}/libarcore_sdk_c.so
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INTERFACE_INCLUDE_DIRECTORIES ${ARCORE_INCLUDE}
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)
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# This is the main app library.
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add_library(HelloAR SHARED
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src/main/cpp/BackgroundRenderer.cc
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src/main/cpp/hello_ar_application.cc
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src/main/cpp/jni_interface.cc
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src/main/cpp/ObjectRenderer.cc
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src/main/cpp/PlaneRenderer.cc
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src/main/cpp/PointCloudRenderer.cc
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src/main/cpp/util.cc
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../../Tutorials/Common/src/TexturedCube.cpp
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)
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target_include_directories(HelloAR PRIVATE
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src/main/cpp
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)
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target_link_libraries(HelloAR
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android
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log
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GLESv3
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arcore
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Diligent-BuildSettings
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Diligent-Common
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Diligent-GraphicsEngineOpenGL-shared
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Diligent-GraphicsTools
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Diligent-TextureLoader)

‎Android/HelloAR/build.gradle‎

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apply plugin: 'com.android.application'
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buildDir '../build/HelloAR'
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def setVersionName = { ->
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if (project.hasProperty("androidVersionName")) {
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println("Replacing versionName with supplied build parameter: " +
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"$androidVersionName")
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return androidVersionName
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} else {
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return "1.0"
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}
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}
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android {
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compileSdkVersion 28
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defaultConfig {
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applicationId "com.google.ar.core.examples.c.helloar"
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// 24 is the minimum since ARCore only works with 24 and higher.
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minSdkVersion 24
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targetSdkVersion 28
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versionCode 1
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versionName setVersionName()
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}
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compileOptions {
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sourceCompatibility JavaVersion.VERSION_1_8
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targetCompatibility JavaVersion.VERSION_1_8
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}
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buildTypes {
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release {
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minifyEnabled false
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proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
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}
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}
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}
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dependencies {
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implementation project(":Common")
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implementation 'com.android.support:appcompat-v7:28.0.0'
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implementation 'com.android.support:design:28.0.0'
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}

‎Android/HelloAR/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# By default, the flags in this file are appended to flags specified
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# in /opt/android-sdk/tools/proguard/proguard-android.txt
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# You can edit the include path and order by changing the proguardFiles
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# directive in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# Add any project specific keep options here:
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}

‎Android/HelloAR/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<!--
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Copyright 2017 Google Inc.
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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 xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.google.ar.core.examples.c.helloar">
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<uses-permission android:name="android.permission.CAMERA"/>
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<!-- This tag indicates that this application requires ARCore. This results in the application
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only being visible in the Google Play Store on devices that support ARCore. -->
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<uses-feature android:name="android.hardware.camera.ar" android:required="true"/>
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<uses-feature android:glEsVersion="0x00030000" android:required="true" />
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<application
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android:allowBackup="true"
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android:icon="@drawable/ic_launcher"
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android:label="@string/app_name"
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android:theme="@style/AppTheme"
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android:usesCleartextTraffic="false">
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<!-- This tag indicates that this application requires ARCore. This results in the Google Play
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Store downloading and installing ARCore along with the application. -->
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<meta-data android:name="com.google.ar.core" android:value="required" />
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<activity
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android:name=".HelloArActivity"
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android:label="@string/app_name"
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android:configChanges="orientation|screenSize"
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android:exported="true"
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android:theme="@style/Theme.AppCompat.NoActionBar"
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android:screenOrientation="locked">
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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>

‎Android/HelloAR/src/main/assets/shaders/object.psh‎

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Texture2D g_Texture;
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SamplerState g_Texture_sampler;
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struct PSInput
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{
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float4 Pos : SV_POSITION;
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float2 UV : TEX_COORD;
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};
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struct PSOutput
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{
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float4 Color : SV_TARGET;
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};
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cbuffer Constants
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{
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float4x4 g_ModelView;
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float4x4 g_ModelViewProjection;
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float4 g_LightingParameters;
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float4 g_ColorCorrectionParameters;
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float4 g_ObjectColor;
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}
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void main(in PSInput PSIn,
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out PSOutput PSOut)
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{
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float3 Color = g_Texture.Sample(g_Texture_sampler, PSIn.UV).rgb * 0.5;
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// Approximate sRGB gamma.
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const float kGamma = 0.4545454;
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const float kInverseGamma = 2.2;
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const float kMiddleGrayGamma = 0.466;
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float3 ColorShift = g_ColorCorrectionParameters.rgb;
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float AveragePixelIntensity = g_ColorCorrectionParameters.a;
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// Apply color to grayscale image only if the alpha of g_ObjectColor is
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// greater than or equal to 255.0.
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//if (g_ObjectColor.a >= 255.0)
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//{
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// float intensity = Color.r;
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// Color.rgb = g_ObjectColor.rgb * intensity / 255.0;
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//}
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// Apply sRGB gamma before writing the fragment color.
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Color.rgb = pow(Color, float3(kGamma, kGamma, kGamma));
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// Apply average pixel intensity and color shift
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Color *= ColorShift * (AveragePixelIntensity / kMiddleGrayGamma);
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PSOut.Color = float4(Color, 1.0);
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}

‎Android/HelloAR/src/main/assets/shaders/object.vsh‎

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cbuffer Constants
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{
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float4x4 g_ModelView;
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float4x4 g_ModelViewProjection;
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float4 g_LightingParameters;
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float4 g_ColorCorrectionParameters;
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float4 g_ObjectColor;
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}
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struct VSInput
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{
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float3 Pos : ATTRIB0;
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float2 UV : ATTRIB1;
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};
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struct PSInput
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{
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float4 Pos : SV_POSITION;
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float2 UV : TEX_COORD;
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};
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void main(in VSInput VSIn,
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out PSInput PSIn)
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{
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PSIn.Pos = mul(float4((VSIn.Pos + float3(0.0, 0.0, 1.0)) * 0.075, 1.0), g_ModelViewProjection);
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PSIn.UV = VSIn.UV;
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}

‎Android/HelloAR/src/main/assets/shaders/plane.psh‎

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Texture2D g_Texture;
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SamplerState g_Texture_sampler;
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cbuffer Constants
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{
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float4x4 g_MVP;
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float4x4 g_ModelMat;
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float4 g_Normal;
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float4 g_Color;
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}
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struct PSInput
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{
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float4 Pos : SV_POSITION;
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float2 UV : TEX_COORD;
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float Alpha : ALPHA;
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};
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struct PSOutput
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{
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float4 Color : SV_TARGET;
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};
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void main(in PSInput PSIn,
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out PSOutput PSOut)
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{
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float r = g_Texture.Sample(g_Texture_sampler, PSIn.UV).r;
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PSOut.Color = float4(g_Color.rgb, r * PSIn.Alpha);
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}

‎Android/HelloAR/src/main/assets/shaders/plane.vsh‎

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cbuffer Constants
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{
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float4x4 g_MVP;
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float4x4 g_ModelMat;
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float4 g_Normal;
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float4 g_Color;
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}
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struct VSInput
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{
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float3 Pos : ATTRIB0;
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};
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struct PSInput
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{
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float4 Pos : SV_POSITION;
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float2 UV : TEX_COORD;
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float Alpha : ALPHA;
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};
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void main(in VSInput VSIn,
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out PSInput PSIn)
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{
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// Vertex Z value is used as the alpha in this shader.
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PSIn.Alpha = VSIn.Pos.z;
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float4 LocalPos = float4(VSIn.Pos.x, 0.0, VSIn.Pos.y, 1.0);
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PSIn.Pos = mul(LocalPos, g_MVP);
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float4 WorldPos = mul(LocalPos, g_ModelMat);
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// Construct two vectors that are orthogonal to the normal.
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// This arbitrary choice is not co-linear with either horizontal
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// or vertical plane normals.
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float3 arbitrary = float3(1.0, 1.0, 0.0);
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float3 float_u = normalize(cross(g_Normal.xyz, arbitrary));
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float3 float_v = normalize(cross(g_Normal.xyz, float_u));
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// Project vertices in world frame onto float_u and float_v.
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PSIn.UV = float2(dot(WorldPos.xyz, float_u),
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dot(WorldPos.xyz, float_v));
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}

‎Android/HelloAR/src/main/assets/textures/DGLogo.png‎

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