ios 全景浏览效果demo

demo功能：全景浏览效果，可上下左右前后转动浏览。

demo说明：项目中pano.jpg 是贴图。将这个图贴到球型模型上，摄像机设定为球的中心点，在内向球外观看贴图。

demo截屏：

demo主要代码：plview.m部分（显示全景的view）

[csharp]
#import "PLView.h"

@interface PLView ()

- (void)initializeValues;

@end

@implementation PLView

@synthesize type;
@synthesize camera;

#pragma mark -
#pragma mark init methods

- (void)allocAndInitVariables
{
    [super allocAndInitVariables];
    scene = [PLScene scene];
    renderer = [PLRenderer rendererWithView:self scene:[scene retain]];
    camera = [PLCamera camera];
}

- (void)initializeValues
{
    [super initializeValues];
    textures = [[NSMutableArray array] retain];
    type = PLViewTypeUnknown;
}

- (void)reset
{
    if(camera)
        [camera reset];
    [super reset];
}

#pragma mark -
#pragma mark property methods

- (void)setType:(PLViewType)value
{
    type = value;
    if(sceneElement)
        [sceneElement release];

    switch (value) {
        case PLViewTypeCylindrical:
            camera.fovFactorRange = PLRangeMake(kDefaultCylinderFovFactorMinValue, kDefaultCylinderFovFactorMaxValue);
            sceneElement = [PLCylinder cylinder];
            break;
        case PLViewTypeSpherical:
            camera.fovFactorRange = PLRangeMake(kDefaultFovFactorMinValue, kDefaultFovFactorMaxValue);
            sceneElement = [PLSphere sphere];
            break;
        case PLViewTypeCubeFaces:
            camera.fovFactorRange = PLRangeMake(kDefaultFovFactorMinValue, kDefaultFovFactorMaxValue);
            sceneElement = [PLCube cube];
            break;
        case PLViewTypeUnknown:
            sceneElement = nil;
            break;
        default:
            [NSException raise:@"Invalid panorama type" format:@"Type unknown", nil];
            break;
    }

    if(sceneElement)
    {
        sceneElement = [sceneElement retain];
        for(PLTexture * texture in textures)
            [sceneElement addTexture:texture];
        [scene addElement:sceneElement];
    }
}

#pragma mark -
#pragma mark draw methods

- (void)drawView
{
    [super drawView];

    [sceneElement clonePropertiesOf:camera];
    [scene.currentCamera cloneCameraProperties:camera];
    scene.currentCamera.rotation = PLRotationMake(0.0f, 0.0f, 0.0f);
    scene.currentCamera.position = PLPositionMake(0.0f, 0.0f, 0.0f);

    if(!isValidForFov && !isValidForOrientation)
        [sceneElement rotateWithStartPoint:startPoint endPoint:endPoint sensitivity:camera.rotateSensitivity];
    [renderer render];

    camera.rotation = PLRotationMake(sceneElement.pitch, sceneElement.yaw, sceneElement.roll);
}

#pragma mark -
#pragma mark fov methods

- (BOOL)calculateFov:(NSSet *)touches
{
    if([super calculateFov:touches])
    {
        [camera addFovWithDistance:fovDistance];
        [scene.currentCamera addFovWithDistance:fovDistance];
        return YES;
    }
    return NO;
}

#pragma mark -
#pragma mark texture methods

- (void)addTexture:(PLTexture *)texture
{
    [textures addObject:texture];
    if(sceneElement)
        [sceneElement addTexture:texture];
}

- (void)removeTexture:(PLTexture *)texture
{
    [textures removeObject:texture];
    if(sceneElement)
        [sceneElement removeTexture:texture];
}

- (void)removeTextureAtIndex:(NSUInteger) index
{
    [textures removeObjectAtIndex:index];
    if(sceneElement)
        [sceneElement removeTextureAtIndex:index];
}

- (void)removeAllTextures
{
    [textures removeAllObjects];
    if(sceneElement)
        [sceneElement removeAllTextures];
}

#pragma mark -
#pragma mark orientation methods &n

补充：移动开发 , IOS ,