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PanoramaGL向你展示360°全景影像

2013-07-28 23:17 316 查看
传送门 ☞ 轮子的专栏 ☞ 转载请注明 ☞ http://blog.csdn.net/leverage_1229

介绍

本指南将介绍一个PanoramaGL 0.1类库的简单用法,更多的细节请签出HelloPanoramaGL示例查看。

细节

1如何导入PanoramaGL类库?

1.1从源代码中导入

(1)下载PanoramaGL_0.1.zip或从代码仓库下载源代码

(2)如果你下载zip文件然后解压该文件

(3)在Eclipse中导入PanoramaGL项目:

点击“File”选择“Import”菜单;

选择“General”目录中的“Existing Projects into Workspace”,点击“Next”按钮;

点击“Browse”按钮,选择PanoramaGL项目文件夹

点击“Finish”按钮。

(4)右键单击你的项目并选择“Properties”选项

(5)选择左侧面板“Android”选项

(6)找到右侧面板“Library”部分,点击“Add...”按钮

(7)选择“PanoramaGL”类库,点击“OK”按钮

(8)在属性窗口的右下角选择“OK”按钮表示接受更改

1.2从编译后的文件中导入

(1)下载libglues.zip

(2)解压zip文件并复制到你的项目的“libs”文件夹中

(3)下载PanoramaGL 0.1.jar

(4)复制jar文件到你的项目的“libs”文件夹中

(5)在你的项目中导入jar文件:

右键单击你的项目并选择“Properties”选项;

选择左侧面板“Java Build Path”选项;

选择“Libraries”选项卡;

点击“Add JARs”按钮;

在你的项目中选择“libs/PanoramaGL_0.1.jar”文件;

点击“OK”按钮;

在属性窗口的右下角选择“OK”按钮表示接受更改。

2在应用程序中如何使用PanoramaGL?

(1)如前面描述那样导入类库

(2)在“res/raw”文件夹中导入一个球面图像(如:pano_sphere.jpg)

(3)在Activity中,你需要构建一个全景图像的查看器,具体做法如下:

继承PLView类

public class YourActivity extends PLView
在onCreate()方法中加载全景图像

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
PLSphericalPanorama panorama = new PLSphericalPanorama();
panorama.setImage(this.getCurrentGL(), PLImage.imageWithBitmap(PLUtils.getBitmap(this, R.raw.pano_sphere)));
this.setPanorama(panorama);
}
注意:如果有必要的话,你也可以从其他方法中加载全景图像或事件。

3简单JSON协议

同样,你可以使用JSON协议加载全景图像。

注意:在该版本中,JSON协议被限制只处理本地文件。

3.1源代码

this.load(new PLJSONLoader(this, "res://raw/json_spherical"));
注意:在我的应用程序的“res/raw”文件夹中有一个名为“json_spherical.data”的文件,可以使用这段代码加载。或

this.load(new PLJSONLoader(this, "file:///sdcard/files/json_spherical.data"));
注意:在Android设备的“/sdcard/files”文件夹中有一个名为“json_spherical.data”的文件,可以使用这段代码加载。

3.2JSON协议

{
"urlBase": "file:///sdcard/files",  //URL base where the files are
//The options are res:// for application resources and file:// for file system (this feature will be improved to support the http protocol)
"type": "spherical",                //Panorama type: [spherical, spherical2, cubic, cylindrical]
"sensorialRotation": false,         //Automatic rotation using sensors [true, false] <Optional>
"scrolling":                        //Scrolling section <Optional>
{
"enabled": false                //Enable scrolling feature [true, false] <Optional>
},
"inertia":                          //Inertia section <Optional>
{
"enabled": false,               //Enable inertia feature [true, false] <Optional>
"interval": 3                   //Inertia's interval in seconds <Optional>
},
"accelerometer":                    //Accelerometer section <Optional>
{
"enabled": false,               //Enable the accelerometer feature [true, false] <Optional>
"interval": 0.033,              //Update interval of accelerometer (this value must be calculated as 1/frequency) <Optional>
"sensitivity": 10.0,            //Sensitivity of the accelerometer <Optional>
"leftRightEnabled": true,       //Enable the direction of movement with the accelerometer (left/right) <Optional>
"upDownEnabled": false          //Enable the direction of movement with the accelerometer (up/down) <Optional>
},
"images":                           //Panoramic images section
//A property can be a name e.g. preview.jpg, preview or URL e.g. file:///sdcard/files/preview.jpg, res://raw/preview
//if a property only have a name, the real path will be the urlBase + image name
{
"preview": "preview.jpg",       //Preview image name or URL (this option will be used with http protocol) <Optional>
"image": "pano.jpg"             //Panoramic image name or URL for spherical, spherical2 and cylindrical panoramas
"front": "front.jpg",           //Front image name or URL for cubic panorama (only use with cubic panorama)
"back": "back.jpg",             //Back image name or URL for cubic panorama (only use with cubic panorama)
"left": "left.jpg",             //Left image name or URL for cubic panorama (only use with cubic panorama)
"right": "right.jpg",           //Right image name or URL for cubic panorama (only use with cubic panorama)
"up": "up.jpg",                 //Up image name or URL for cubic panorama (only use with cubic panorama)
"down": "down.jpg"              //Down image name or URL for cubic panorama (only use with cubic panorama)
},
"camera":                           //Camera settings section <Optional>
{
"vlookat": 0,                   //Initial vertical position [-90, 90]
"hlookat": 0,                   //Initial horizontal position [-180, 180]
"atvmin": -90,                  //Min vertical position [-90, 90]
"atvmax": 90,                   //Max vertical position [-90, 90]
"athmin": -180,                 //Min horizontal position [-180, 180]
"athmax": 180                   //Max horizontal position [-180, 180]
},
"hotspots": [                       //Hotspots section (this section is an array of hotspots) <Optional>
{
"id": 1,               //Hotspot identifier (long)
"atv": 0,              //Vertical position [-90, 90]
"ath": 0,              //Horizontal position [-180, 180]
"width": 0.08,         //Width
"height": 0.08,        //Height
"image": "hotspot.png" //Image name or URL
}
]
}

3.3看到

PLJSONLoader类和PLView加载方法。

json_spherical.data、json_spherical2、json_cylindrical.data和json_cubic.data都位于HelloPanoramaGL示例的“res/raw”文件夹中。

4更多信息

想获得更多信息,请签出HelloPanoramaGL示例,该示例运行在Android2.x或以上版本。

5效果图



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